WO2021112031A1 - アンテナシステムおよびアンテナ回路基板 - Google Patents
アンテナシステムおよびアンテナ回路基板 Download PDFInfo
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- WO2021112031A1 WO2021112031A1 PCT/JP2020/044469 JP2020044469W WO2021112031A1 WO 2021112031 A1 WO2021112031 A1 WO 2021112031A1 JP 2020044469 W JP2020044469 W JP 2020044469W WO 2021112031 A1 WO2021112031 A1 WO 2021112031A1
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- Prior art keywords
- glass
- layer
- antenna system
- circuit board
- low
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/422—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising two or more layers of dielectric material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
- B32B17/1022—Metallic coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10293—Edge features, e.g. inserts or holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
- B32B17/10467—Variable transmission
- B32B17/10495—Variable transmission optoelectronic, i.e. optical valve
- B32B17/10504—Liquid crystal layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/1271—Supports; Mounting means for mounting on windscreens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/40—Radiating elements coated with or embedded in protective material
- H01Q1/405—Radome integrated radiating elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0485—Dielectric resonator antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
Definitions
- the present invention relates to an antenna system useful for high frequency communication and an antenna circuit board useful for this antenna system.
- an antenna for transmitting and receiving a car telephone or a mobile phone is arranged on a moving body such as an automobile.
- Patent Document 1 Japanese Unexamined Patent Publication No. 2007-53505
- an antenna made of conductive wires arranged on the window glass surface of a moving body such as an automobile or the surface of an insulating member of the body is described as a UHF broadcast wave of television. It is described that it is suitable for receiving radio waves of VHF broadcast waves and transmitting and receiving wide band radio waves such as car phones, mobile phones, personal radios, commercial radios, and PHS.
- the amount of information that can be transmitted is limited and the amount of information is large in the radio waves of UHF broadcast waves and VHF broadcast waves, and the radio waves used in automobile phones, mobile phones, personal radios, commercial radios, PHS, etc. Can't be done.
- the amount of information transmitted has been steadily increasing, and in order to exchange a large amount of information, it is necessary to use a high frequency GHz band.
- the inventors of the present invention examined the use of an antenna circuit board having high accuracy for high frequencies in order to achieve the above object. As a result, the transmission distance becomes short at high frequencies, so that in the conventional MHz band, the transmission distance becomes short.
- a first glass layer that transmits high frequencies A low-dielectric layer having a dielectric constant lower than that of the first glass layer, adjacent to the first glass layer, and transmitting a high frequency incident from the first glass layer.
- An antenna system for use at a frequency of 1 GHz or higher preferably 2 GHz or higher, more preferably 6 GHz or higher, further preferably 30 GHz or higher, particularly preferably 50 GHz or higher).
- the antenna system according to the first aspect wherein the high frequency insulating layer is made of a thermoplastic liquid crystal polymer or polyimide.
- the dielectric constant ⁇ g of the first glass layer is 5.5 as the dielectric constant in both one direction in a plane and the direction orthogonal to it, which is measured at a frequency of 28 GHz. It is ⁇ 7.5 (preferably 5.8 to 7.3, more preferably 6.0 to 7.0), and the dielectric constant ⁇ f of the low dielectric layer is 2.0 to 4.0 (preferably 2.).
- the low dielectric layer is selected from the group consisting of a polyvinyl acetal resin, an olefin-vinyl carboxylate copolymer resin, an ionomer resin, and an acrylic resin.
- An antenna system consisting of at least one type of plastic.
- the dielectric constant ⁇ p of the high frequency insulating layer is defined as the dielectric constant in both one direction in a plane and the direction orthogonal to it, which is measured at a frequency of 28 GHz.
- An antenna system of 2.0 to 4.0 preferably 2.2 to 3.5, more preferably 2.4 to 3.0).
- the dielectric loss tangent tan ⁇ p of the high frequency insulating layer is used as the dielectric loss tangent in both the unidirectional plane and the direction orthogonal to the antenna system measured at a frequency of 28 GHz.
- An antenna system of 0.010 or less preferably 0.005 or less, more preferably 0.003 or less.
- Antenna system The antenna system according to any one of aspects 1 to 8, wherein the thickness of the low dielectric layer is ⁇ / 4 ⁇ n ⁇ 0.050 mm (where ⁇ is a high frequency wavelength and n is an integer. ) (Preferably ⁇ / 4 ⁇ n ⁇ 0.030 mm, more preferably ⁇ / 4 ⁇ n ⁇ 0.025 mm).
- the first glass layer is soda lime glass, borate glass, borosilicate glass, aluminosilicate glass, quartz glass, non-alkali glass, and An antenna system consisting of at least one selected from low alkaline glass.
- Aspect 11 The antenna system according to any one of aspects 1 to 10, further comprising a second glass layer, between the first glass layer and the second glass layer, a low dielectric layer and an antenna.
- Aspect 13 The antenna system according to any one of aspects 1 to 11, wherein the antenna system receives radio waves in a state of being attached to a vehicle, a building, or a civil engineering structure.
- a high-frequency antenna circuit board is disposed and a glass layer is disposed on the antenna circuit substrate via a low-dielectric layer to suppress high-frequency attenuation and achieve high-frequency waves. It is possible to improve the transmission characteristics of the antenna circuit board and exchange a large amount of information.
- the antenna system of the present invention has a first glass layer that transmits high frequencies and a dielectric constant lower than that of the first glass layer, is adjacent to the first glass layer, and is incident from the first glass layer. It is provided with at least a low-dielectric layer that transmits the high frequency and an antenna circuit board that is adjacent to the low-dielectric layer and includes a high-frequency insulating layer that receives the high frequency incident from the low-dielectric layer.
- the high frequency frequency targeted by the antenna system of the present invention may be, for example, 1 GHz or higher, preferably 2 GHz or higher, more preferably 6 GHz or higher, still more preferably 30 GHz or higher, and particularly preferably 50 GHz or higher.
- the upper limit of the frequency is not particularly limited, but may be, for example, 400 GHz or less, preferably 300 GHz or less.
- FIG. 1 is a schematic cross-sectional view for explaining a method of manufacturing an antenna system according to the first embodiment.
- the antenna system 100 according to the first embodiment includes a first glass layer 101, a low dielectric layer 103 having a dielectric constant lower than that of the first glass layer 101, and an antenna circuit board 107. It has.
- the first glass layer 101 and the low-dielectric layer 103 have a portion adjacent to each other in the thickness direction, and the low-dielectric layer 103 and the antenna circuit board 107 have a portion adjacent to each other in the thickness direction. ..
- antenna circuit board only one antenna circuit board is arranged, but one or more antenna circuit boards (for example, 1 to 10) are included in one antenna system adjacent to the low dielectric layer. You may. When a plurality of antenna circuit boards are included, it may be multi-band compatible including a non-high frequency antenna circuit board (circuit board whose frequency is less than 1 GHz). This also applies to the following embodiments.
- the first glass layer 101 may be, for example, a window glass or the like.
- the position of the antenna circuit board in the plane of the window glass is not particularly limited.
- the position of the antenna circuit board 107 is arranged so as to be in contact with the end of the window glass.
- the one end portion (the outermost end portion of the antenna circuit board) of the antenna circuit board 107 may be present inward (for example, about 1 to 10 cm inward) from the end portion of the window glass. It may be in the arranged state.
- the antenna circuit board may be arranged on the vehicle glass (windshield, side glass, rear glass).
- the antenna circuit board 107 when visibility is required such as window glass and automobile glass, it is preferable to arrange the antenna circuit board 107 in a portion that does not obstruct the view.
- the antenna circuit in the antenna circuit board 107 may be arranged in the end region of 0 cm or more and 10 cm or less inward from the end portion of the first glass layer 103.
- the antenna circuit in the antenna circuit board 107 may be arranged away from the end portion of the first glass layer 103, for example, the first. It may be arranged in the end region (preferably the region of 1 cm or more and 10 cm or less inward) of 1 cm or more inward from the end of the glass layer 103 of 1. These are the same in the following embodiments.
- the high frequency A indicated by the arrow at one end toward the first glass layer 101 enters the first glass layer 101 from the outside of the first glass layer 101 and exits inside the first glass layer 101. Therefore, in the thickness direction Z indicated by the arrows at both ends, the first glass layer 101 has one as an outer surface and the other as an inner surface.
- the low-dielectric layer 103 is adjacent to the inside of the first glass layer 101 in the thickness direction Z
- the antenna circuit board 107 is adjacent to the inside of the low-dielectric layer 103 in the thickness direction Z.
- the high frequency A enters from the outer surface of the first glass layer 101 and then reaches the antenna circuit board 107 via the low dielectric layer 103 adjacent to the first glass layer 101. Then, the high frequency A that has reached the antenna circuit board 107 is received by the antenna circuit board 107. It should be noted that, in the present specification, even if only the reception is described, not only the reception but also the transmission is possible, and the same applies to all the embodiments.
- the antenna circuit board 107 includes a high-frequency insulating layer (hereinafter, may be simply referred to as an insulating layer) 105, a circuit layer 104 arranged on one surface of the insulating layer 105 (outer surface in the thickness direction Z), and the like. It includes a conductor layer 106 disposed on the other surface (inner side surface in the thickness direction Z) of the insulating layer 105. Although only one circuit layer is shown in FIG. 1 for simplification, the antenna circuit board 107 is a multi-layer circuit board because an inner layer circuit (not shown) may be included in the insulating layer. There may be. Further, the conductor layer 106 may have a circuit pattern, if necessary, or may be a metal layer having reflectivity or the like. In the conductor layer 106, when the high frequency A incident on the antenna circuit board 107 is reflected by the reflective metal layer, the utilization efficiency of the high frequency A in the antenna circuit board 107 can be improved.
- an insulating layer hereinafter, may be simply
- the high frequency A has a wavelength ⁇ at a predetermined frequency, and after being incident on the first glass layer 101, a part of the high frequency A does not reach the antenna circuit board 107 and is reflected, but the first glass layer
- the dielectric constant ⁇ f of the low dielectric layer 103 smaller than the dielectric constant ⁇ g of 101, the reflectance R from when the high frequency A is incident on the first glass layer 101 until it reaches the surface of the antenna circuit board 107 is reduced.
- the ratio of the high frequency A reaching the antenna circuit board 107 can be increased.
- the first glass layer 101 has a thickness dl
- the low dielectric layer 103 has a thickness df on the antenna circuit board 107
- the antenna circuit board has a thickness df.
- the insulating layer 105 in 107 has a thickness of dp.
- the first glass layer 101 and the insulating layer 105 ignoring the circuit portion Although it is grasped as the distance between them, it is referred to as the thickness df of the low dielectric layer 103 for convenience.
- the thickness df on the antenna circuit board 107 may be the thickness of the low dielectric layer disposed on the incident side of the high frequency A with respect to the antenna circuit board.
- the thickness dg of the first glass layer 101 can be appropriately set from, for example, in the range of 0.1 to 100 mm depending on the use of the object provided with the first glass layer, and is, for example, 0. It may be about 5 to 20 mm (for example, 1 to 20 mm), preferably about 1 to 15 mm (for example, 3 to 13 mm), and more preferably about 1.5 to 10 mm (for example, 4 to 10 mm). You may.
- the first glass layer 101 may be the first glass layer of a vehicle, the first glass layer of a building, or the like, or may be the first glass layer forming a laminated glass.
- the thickness dp of the insulating layer 105 in the antenna circuit board 107 can be appropriately set according to the required antenna performance and the like, and can be selected from a wide range of, for example, 10 ⁇ m to 2.5 mm. It may be about 1 to 2.5 mm, preferably about 0.3 to 2.0 mm, and more preferably about 0.3 to 1.0 mm.
- the thickness dp of the insulating layer indicates the total thickness of the insulating layers (or the total thickness of all the insulating layers) constituting the multilayer circuit board when the antenna circuit board is a multilayer circuit board.
- the low-dielectric layer 103 has adhesiveness to both the first glass layer 101 and the antenna circuit board 107, and the antenna circuit board 107 is the first via the low-dielectric layer 103. It is attached to the glass layer 101. Therefore, the low-dielectric layer 103 has a surface in close contact with the first glass layer 101, and the antenna circuit board 107 has a surface in close contact with the low-dielectric layer 103.
- the low-dielectric layer 103 may have a desired size with respect to the antenna circuit board 107 depending on the application. As shown in FIG. 1, the dimension of the low dielectric layer 103 in the plane direction may be the same as that of the antenna circuit board 107, or may be small or large. When the low-dielectric layer 103 is larger in the plane direction than the antenna circuit board 107, the low-dielectric layer 103 may embed the antenna circuit board 107.
- the plane direction is a plane direction with the thickness direction Z in FIG. 1 as a normal.
- the dimensions of the low-dielectric layer and the high-frequency antenna circuit board are also common to the following embodiments.
- the first glass layer 101, the low-dielectric layer 103, and the antenna circuit board 107 may be adjacent to each other by using an external adhesive means, if necessary. .. In that case, it is preferable that the adjacent surfaces between the low-dielectric layer 103 and the first glass layer 101 are in close contact with each other without an air layer. Similarly, the adjacent surfaces between the low dielectric layer 103 and the antenna circuit board 107 are preferably in close contact with each other without an air layer.
- the antenna circuit board 107 can be arranged at a desired location in a desired size according to the application.
- protective members for protecting the antenna circuit board 107 are arranged on the back surface of the antenna circuit board 107 (that is, the surface opposite to the surface in contact with the low dielectric layer 103) and / or the side surface. You may.
- a protective member for example, a further low-dielectric layer may be arranged adjacent to the antenna circuit board 107.
- a further low-dielectric layer and a second glass layer may be arranged adjacent to the antenna circuit board 107 in this order.
- a sealing material may be provided on at least a part of the edge of the first glass layer 103.
- FIG. 2 is a schematic cross-sectional view for explaining a method of manufacturing an antenna system according to the second embodiment.
- the antenna system 200 according to the second embodiment includes a first glass layer 201, a low dielectric layer 203 having a dielectric constant lower than that of the first glass layer 201, and an antenna circuit board 107.
- the first glass layer 201 and the second glass layer 202 arranged so as to face each other in the thickness direction Z are provided.
- the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
- a double glazing (or laminated glass) is formed by a first glass layer 201 and a second glass layer 202, and a window glass or a vehicle glass (front glass, side glass, etc.) made of the double glazing is formed. (Rear glass) or the like, or a state in which the antenna circuit board 107 is disposed inside the first glass layer 201 and the second glass layer 202 via the low dielectric layer 103.
- the antenna circuit board 107 is embedded in the low-dielectric layer 203, and the first glass layer 201 and the second glass layer 202 are adhered to each other by the low-dielectric layer 203.
- the high frequency A has a wavelength ⁇ at a predetermined frequency, and after being incident on the first glass layer 201, a part of the high frequency A does not reach the antenna circuit board 107 and is reflected by a predetermined reflectance R.
- the dielectric constant ⁇ f of the low dielectric layer 203 smaller than the dielectric constant ⁇ g of the first glass layer 201, the reflectance R can be reduced and the ratio of the high frequency A reaching the antenna circuit board 107 can be improved. it can.
- the first glass layer 201 has a thickness dl in the thickness direction Z
- the low dielectric layer 203 has a thickness df above the antenna circuit board 107
- the antenna circuit board The insulating layer 105 in 107 has a thickness of dp.
- the thickness df of the low-dielectric layer 203 is grasped not as the distance between the first glass layer 201 and the second glass layer 202 but as the distance between the first glass layer 201 and the insulating layer 105.
- the total thickness da of the low-dielectric layer 203 means the total thickness of the low-dielectric layer, and in FIG. 2, the distance between the first glass layer 201 and the second glass layer 202 is shown. .. These are the same in all embodiments.
- the thickness dg of the first glass layer 201 can be appropriately set according to the use of the object provided with the first glass layer, and is, for example, about 0.5 to 20 mm (for example, 1 to 20 mm). It may be about 1 to 15 mm (for example, 3 to 13 mm), and more preferably about 1.5 to 10 mm (for example, 4 to 10 mm).
- the thickness dg'of the second glass layer 202 can also be appropriately set according to the use of the object provided with the second glass layer 202, and is, for example, 0.5 to 20 mm (for example, 1 to 1 to 1). It may be about 20 mm), preferably about 1 to 15 mm (for example, 3 to 13 mm), and more preferably about 1.5 to 10 mm (for example, 4 to 10 mm).
- the antenna circuit board 107 can be arranged in a desired place with a desired size according to the application.
- FIG. 3 is a schematic cross-sectional view for explaining a method of manufacturing an antenna system according to a third embodiment.
- the antenna system 300 according to the third embodiment includes a first glass layer 301, a low dielectric layer 303 having a dielectric constant lower than that of the first glass layer 301, and an antenna circuit board 107.
- a second glass layer 302 is provided.
- the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
- the first glass layer 301 and the low-dielectric layer 303 have a portion adjacent to each other in the thickness direction, and the low-dielectric layer 303 and the antenna circuit board 107 have a portion adjacent to each other in the thickness direction. .. Further, the antenna circuit board 107 may be attached to the second glass layer 302 by various fixing means. For example, the antenna circuit board 107 may be attached to the second glass layer 302 via the adhesive layer 308. May be good.
- the second glass layer 302 may be, for example, a window glass, or the antenna circuit board 107 may be arranged outside the window glass.
- the third embodiment after the high frequency A is incident on the first glass layer 301, a part of the high frequency A does not reach the antenna circuit board 107 and is reflected by a predetermined reflectance R, but the first glass.
- the dielectric constant ⁇ f of the low dielectric layer 303 smaller than the dielectric constant ⁇ g of the layer 301, the reflectance R can be reduced and the ratio of the high frequency A reaching the antenna circuit board 107 can be improved.
- the first glass layer 301 has a thickness dl in the thickness direction Z
- the low dielectric layer 303 has a thickness df
- the insulating layer 105 in the antenna circuit board 107 has a thickness df. It has a thickness of dp.
- the thickness df of the low-dielectric layer 303 is grasped not as the distance between the first glass layer 301 and the second glass layer 302, but as the distance between the first glass layer 301 and the insulating layer 305.
- the overall thickness of the low dielectric layer 303 is the same as the thickness df on the antenna circuit board 107.
- the first glass layer 301 may be thin from the viewpoint of weight reduction, and the thickness dg may be, for example, about 0.5 to 7 mm, preferably about 0.7 to 5 mm, and more preferably 0. It may be about 8 to 3 mm.
- the thickness dg'of the second glass layer 302 can be appropriately set according to the use of the object provided with the second glass layer 302, and is, for example, 0.5 to 20 mm (for example, 1 to 20 mm). ), Preferably about 1 to 15 mm (for example, 3 to 13 mm), and more preferably about 1.5 to 10 mm (for example, 4 to 10 mm).
- the adhesive layer 308 is known or commonly used to have adhesiveness to the antenna circuit board and the glass as long as the antenna circuit board 107 can be adhered to the second glass layer.
- Adhesive materials can be used.
- an adhesive material used for the low dielectric layer may be used.
- the 308 may be a pressure-sensitive adhesive tape such as a double-sided tape.
- the antenna circuit board 107 can be arranged in a desired place with a desired size according to the application.
- FIG. 4 is a schematic cross-sectional view for explaining a method of manufacturing an antenna system according to a fourth embodiment.
- the antenna system 400 according to the fourth embodiment includes a first glass layer 401, a low dielectric layer 403 having a dielectric constant lower than that of the first glass layer 401, and an antenna circuit board 107. It has.
- the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
- the first glass layer 401 and the low-dielectric layer 403 have a portion adjacent to each other in the thickness direction, and the low-dielectric layer 403 and the antenna circuit board 107 have a portion adjacent to each other in the thickness direction. ..
- the adherend 409 may have various aspects as long as the antenna circuit board 107 can be fixed, and the adherend 409 may be, for example, a wall portion of a building or a side portion of a vehicle. May be good. Further, the adherend 409 may be a flexible material such as a PEN film, a PET film, or an acrylic film.
- the fourth embodiment after the high frequency A is incident on the first glass layer 401, a part of the high frequency A does not reach the antenna circuit board 107 and is reflected by a predetermined reflectance R, but the first glass.
- the dielectric constant ⁇ f of the low dielectric layer 403 smaller than the dielectric constant ⁇ g of the layer 401, the reflectance R can be reduced and the ratio of the high frequency A reaching the antenna circuit board 107 can be improved.
- the first glass layer 401 has a thickness dl in the thickness direction Z
- the low dielectric layer 403 has a thickness df
- the insulating layer 105 in the antenna circuit board 107 has a thickness df. It has a thickness of dp.
- the thickness df of the low-dielectric layer 403 is grasped as the distance between the first glass layer 401 and the insulating layer 105.
- the overall thickness of the low dielectric layer 403 is the same as the thickness df on the antenna circuit board 107.
- the first glass layer 401 may be thin from the viewpoint of weight reduction, and the thickness dg may be, for example, about 0.5 to 7 mm, preferably about 0.7 to 5 mm, and more preferably 0. It may be about 8 to 3 mm.
- the antenna system 400 may be attached to the adherend 409 by various fixing means.
- the antenna system 400 may be attached to the adherend 409 by using the fixing means 408a and 408b that surround the antenna system 400 from the side surface.
- the fixing means 408a and 408b may be separate members or may be integrated members.
- the fixing means may include bolts, screws, screws and the like.
- the antenna circuit board 107 and the adherend 409 are attached via an adhesive layer such as the adhesive layer 308 shown in FIG. 3, although not shown. It may be glued.
- the adhesive layer uses a known or conventional adhesive material having adhesiveness to the antenna circuit board and the adherend as long as the antenna circuit board 107 can be adhered to the adherend 409. Can be done.
- the adhesive layer may be a pressure-sensitive adhesive material such as double-sided tape.
- the antenna circuit board 107 can be arranged in a desired place with a desired size according to the application.
- FIG. 5 is a schematic cross-sectional view for explaining the antenna system according to the fifth embodiment.
- the antenna system 500 according to the fifth embodiment includes a first glass layer 501, a first low-dielectric layer 503a having a dielectric constant lower than that of the first glass layer 501, and an antenna circuit. It includes a substrate 107, a second low-dielectric layer 503b, and a second glass layer 502 that is disposed relative to the first glass layer 501 in the thickness direction Z.
- the same components as those in the fifth embodiment are designated by the same reference numerals, and the description thereof will be omitted.
- the antenna system 500 may be, for example, a window glass in which laminated glass is formed by the first glass layer 501 and the second glass layer 502 and is made of laminated glass, or the first glass layer 501 and the second glass layer 501 and the second.
- the antenna circuit board 107 may be arranged inside the glass layer 502 via the first low dielectric layer 503a and the second low dielectric layer 503b.
- the antenna circuit board 107 is embedded at the boundary between the first low-dielectric layer 503a and the second low-dielectric layer 503b, and the first low-dielectric layer 503a and the second low-dielectric layer 503b are embedded.
- the first glass layer 501 and the second glass layer 502 are adhered to each other to form a laminated glass.
- the high frequency A has a wavelength ⁇ at a predetermined frequency, and after being incident on the first glass layer 501, a part of the high frequency A does not reach the antenna circuit board 107 and is reflected by a predetermined reflectance R. ,
- the reflectance R is reduced by using the first low-dielectric layer 503a to make the dielectric constant ⁇ f of the first low-dielectric layer 503a smaller than the dielectric constant ⁇ g of the first glass layer 501, and the antenna circuit.
- the proportion of high frequency A reaching the substrate 107 can be improved.
- the first glass layer 501 has a thickness dl in the thickness direction Z
- the first low dielectric layer 503a has a thickness df on the antenna circuit board 107
- the antenna The insulating layer 105 in the circuit board 107 has a thickness dp.
- the thickness df of the first low-dielectric layer 503a on the antenna circuit board 107 is grasped as the distance between the first glass layer 501 and the insulating layer 105.
- the second low-dielectric layer 503b has a thickness df'under the high-frequency antenna circuit board 107, and the second low-dielectric layer 503b has a thickness df'under the high-frequency antenna circuit board 107. Since the ratio of 106 in the plane is more than half, it is grasped as the distance between the second glass layer 501 and the conductive layer 106.
- the thickness df'under the antenna circuit board 107 may be the thickness of the low-dielectric layer arranged on the side opposite to the first low-dielectric layer with respect to the antenna circuit board.
- the first and second low-dielectric layers are integrated, and the total thickness of the low-dielectric layer is the distance between the first glass layer 501 and the second glass layer 502 as the thickness da. Is grasped as.
- the thickness dg of the first glass layer 501 can be appropriately set according to the use of the object provided with the first glass layer 501, and may be, for example, about 0.5 to 20 mm. It may be preferably about 1 to 15 mm, more preferably about 1.5 to 10 mm.
- the thickness dg'of the second glass layer 502 can also be appropriately set according to the use of the object provided with the second glass layer 502, and even if it is, for example, about 0.5 to 20 mm. It may be preferably about 1 to 15 mm, more preferably about 1.5 to 10 mm.
- the thickness df of the first low-dielectric layer 503a and the thickness df'of the second low-dielectric layer 503b may be the same or different from each other.
- the antenna circuit board 107 can be arranged in a desired place with a desired size according to the application.
- FIG. 6 is a schematic cross-sectional view for explaining the antenna system according to the sixth embodiment.
- the antenna system 600 according to the sixth embodiment includes a first glass layer 601 and a first low-dielectric layer 603a having a dielectric constant lower than that of the first glass layer 601 and an antenna circuit. It includes a substrate 107, a second low-dielectric layer 603b, and a second glass layer 602 that is disposed relative to the first glass layer 601 in the thickness direction Z.
- the same components as those in the fifth embodiment are designated by the same reference numerals, and the description thereof will be omitted.
- the antenna system 600 may be, for example, a window glass in which laminated glass is formed by the first glass layer 601 and the second glass layer 602 and is made of laminated glass, or the first glass layer 601 and the second glass layer 601 and the second.
- the antenna circuit board 107 may be arranged inside the glass layer 602 via the first low dielectric layer 603a and the second low dielectric layer 603b.
- the antenna circuit board 107 is embedded in the thick first low-dielectric layer 603a together with the thin second low-dielectric layer 603b.
- the second low-dielectric layer 603b is in contact with the first low-dielectric layer 603a on a surface that is not in contact with either the antenna circuit board or the second glass layer.
- the first low-dielectric layer 603a and the second low-dielectric layer 603b form a low-dielectric layer 603 as a whole, and the first glass layer 601 and the second glass layer 602 are adhered to each other by the low-dielectric layer 603. Laminated glass is formed.
- the high frequency A has a wavelength ⁇ at a predetermined frequency, and after being incident on the first glass layer 601, a part of the high frequency A does not reach the antenna circuit board 107 and is reflected by a predetermined reflectance R.
- the reflectance R is reduced and the antenna circuit. The proportion of high frequency A reaching the substrate 107 can be improved.
- the first glass layer 601 has a thickness dl in the thickness direction Z
- the first low dielectric layer 603a has a thickness df on the antenna circuit board 107
- the antenna The insulating layer 105 in the circuit board 107 has a thickness dp.
- the thickness df of the first low-dielectric layer 603a on the antenna circuit board 107 is insulated from the first glass layer 601 because the ratio of the circuit portion (circuit layer 104) in the plane is less than half. It is grasped as a distance from the layer 105.
- the second low-dielectric layer 603b has a thickness df'under the antenna circuit board 107, and the thickness df'under the antenna circuit board 107 of the second low-dielectric layer 603b is the thickness df'of the conductive layer 106. Since the ratio in the plane is more than half, it is grasped as the distance between the second glass layer 602 and the conductive layer 106.
- the thickness dg of the first glass layer 601 can be appropriately set according to the use of the object provided with the first glass layer 601 and may be, for example, about 0.5 to 20 mm. It may be preferably about 1 to 15 mm, more preferably about 1.5 to 10 mm.
- the thickness dg'of the second glass layer 602 can also be appropriately set according to the use of the object provided with the second glass layer 602, and even if it is, for example, about 0.5 to 20 mm. It may be preferably about 1 to 15 mm, more preferably about 1.5 to 10 mm.
- the antenna circuit board 107 and the second low-dielectric layer 603b may be embedded in the first low-dielectric layer 603a.
- the thickness df on the antenna circuit board 107 of the first low-dielectric layer 603a may be sufficiently thicker than the thickness df'of the second low-dielectric layer 603b.
- the total thickness da of the first and second low-dielectric layers is the same as before the first low-dielectric layer 603a embeds the antenna circuit board 107 and the second low-dielectric layer 603b.
- the thickness of the film of the first low-dielectric layer 603a may be used as the total thickness da of the first and second low-dielectric layers.
- the antenna circuit board 107 can be arranged in a desired place with a desired size according to the application.
- the present invention also includes a laminate including an antenna circuit board and a low dielectric layer adjacent to the antenna circuit board for use in the above-mentioned antenna system and the like.
- the laminate of the present invention may include an antenna circuit board and a low-dielectric layer adjacent to the antenna circuit board.
- the first low-dielectric layer and the antenna circuit board are laminated in this order, and the first low-dielectric layer, the antenna circuit board, and the second low-dielectric layer are laminated in this order.
- Examples include a laminated body to be used.
- the laminated body may further form a third layer such as a protective layer with respect to these laminated bodies.
- the laminate may be combined with an adherend such as glass to form an antenna system.
- such a laminate may form a part of the antenna system described in the first to sixth embodiments described above.
- first and second glass layers are not particularly limited as long as the high frequencies can be transmitted to the antenna circuit board via the low dielectric layer after the high frequencies are transmitted, and the shapes thereof are not particularly limited. Examples include planar glass such as a shape.
- the material of the first and second glass layers is not particularly limited as long as it is a material generally used for window glass and the like, and various translucent transparent or translucent organic glass members (for example, acrylic members, etc.) (Polycarbonate member, etc.) may be used, but from the viewpoint of weather resistance and transparency, inorganic glass members such as soda lime glass, borate glass, borate silicate glass, aluminosilicate glass, and quartz glass can be mentioned. According to the classification by alkaline component, non-alkali glass and low-alkali glass can be mentioned.
- the content of the alkali metal component (for example, Na 2 O, K 2 O, Li 2 O) of the glass member is preferably 15% by weight or less, and more preferably 10% by weight or less.
- the glass member melts a mixture containing a main raw material such as silica and alumina, a defoaming agent such as sardine and antimony oxide, and a reducing agent such as carbon at a temperature of 1400 ° C to 1600 ° C. Then, it is formed into a thin plate and then cooled.
- a main raw material such as silica and alumina
- a defoaming agent such as sardine and antimony oxide
- a reducing agent such as carbon
- the glass formed into a predetermined shape such as a plate by these methods may be thinned or an uneven shape may be imparted to the surface by antiglare treatment or the like. Further, in order to improve smoothness, chemical polishing may be performed with a solvent such as hydrofluoric acid.
- the first and second glass layers may be, for example, window glass for vehicles (for example, window glass for vehicles such as vehicles, railroads, airplanes, and ships), or window glass for buildings. ..
- the second glass layer may be combined with the first glass layer, and the antenna circuit board may be arranged between them.
- the second glass layer is generally a glass member arranged so as to face the first glass layer in the thickness direction, and the second glass layer is made of the same material as the first glass layer. It may be made of different materials.
- the first and second glass layers may include a colored region, and the antenna circuit in the antenna circuit board may be arranged in the colored region.
- the colored areas of the first and / or second glass layer may be partially (eg, edge areas, etc.), especially when visibility is required, such as window glass, vehicle glass, etc. Good.
- the low-dielectric layer has a lower dielectric constant than the first glass layer, and has a role of allowing high frequencies incident from the first glass layer to reach the antenna circuit board.
- the low dielectric layer has a smaller dielectric constant than the first glass layer when compared at the same frequency.
- the dielectric constant ⁇ f of the low dielectric layer exists in the range of the following formula (I) with respect to the dielectric constant ⁇ g of the first glass layer.
- the dielectric constant ⁇ f of the low dielectric layer may be, for example, ⁇ g-5 to ⁇ g-0.1 with respect to the dielectric constant ⁇ g of the first glass layer. It may be preferably ⁇ g-4.5 to ⁇ g-0.5, and more preferably ⁇ g-4 to ⁇ g-1.5.
- the dielectric properties can be measured using a Fabilipero resonator (Model No. DPS03) manufactured by Keycom Co., Ltd. at 28 GHz (25 ° C.) according to JIS R 1660-2.
- the measuring method can measure with extremely high accuracy in both one direction on a plane and a direction perpendicular to it (XY directions), and can measure with high accuracy even if the tan ⁇ is low.
- the dielectric constant ⁇ g of the first glass layer may be 5.5 to 7.5, preferably 5.8 to 7.3, more preferably 6.0 to.
- the dielectric constant ⁇ f of the low dielectric layer may be, for example, 2.0 to 4.0, preferably 2.2 to 3.5, and more preferably 2.4 to 4.0. It may be 3.0.
- the dielectric loss tangent tan ⁇ g of the first glass layer may be 0.05 or less, preferably 0.03 or less, more preferably 0.02 or less.
- the dielectric loss tangent tan ⁇ f of the low dielectric layer may be, for example, 0.05 or less, preferably 0.03 or less, and more preferably 0.01 or less.
- the thickness of the low dielectric layer is ⁇ / 4 ⁇ n ⁇ 0.05 to ⁇ / 4 ⁇ n + 0.050 with respect to the wavelength ⁇ (range: 1 to 100 mm) of high frequency. It may be in the range, preferably in the range of ⁇ / 4 ⁇ n ⁇ 0.030 to ⁇ / 4 ⁇ n + 0.030, more preferably in the range of ⁇ / 4 ⁇ n ⁇ 0.025 to ⁇ / 4 ⁇ n + 0.025. It may be in the range, particularly preferably in the range of ⁇ / 4 ⁇ n ⁇ 0.010 to ⁇ / 4 ⁇ n + 0.010.
- n is an integer (for example, an integer of 1 to 10).
- the thickness of the low dielectric layer (df: unit mm) can be appropriately changed according to the wavelength of high frequency ( ⁇ ) and the dielectric constant ⁇ f of the low dielectric layer, and the following equations (II) to (II) can be appropriately changed. It is preferable that the range satisfies any one of'').
- n is an integer (for example, an integer of 1 to 10).
- the thickness (df: unit mm) of the low-dielectric layer on the antenna circuit board can be appropriately changed according to the wavelength of high frequency ( ⁇ ) and the dielectric constant of the low-dielectric layer, and is described by the following equation (III). ) To (III'') is preferably satisfied.
- n is an integer (for example, an integer of 1 to 10).
- the thickness df of the low dielectric layer can be selected from a wide range of about 1 ⁇ m to 20.0 mm, and from the viewpoint of suppressing reflectance, for example, about 0.1 to 20.0 mm. It may be preferably about 0.1 to 10.0 mm, more preferably about 0.15 to 2.0 mm.
- the thickness df of the low-dielectric layer may be in a thick range when used for laminated glass, and in that case, the thickness df of the low-dielectric layer may exceed, for example, 0.37 mm. It is good, preferably 0.50 mm or more, further preferably 0.75 mm or more, preferably 2.5 mm or less, more preferably 2.28 mm or less, still more preferably 1.6 mm or less, still more. It may be preferably 0.85 mm or less.
- the low-dielectric layer may be thin, for example, the thickness df of the low-dielectric layer may be, for example, 370 ⁇ m or less, more preferably 300 ⁇ m or less, still more preferably 200 ⁇ m. Below, it may be even more preferably 100 ⁇ m or less, particularly preferably 60 ⁇ m or less, particularly more preferably less than 50 ⁇ m, particularly still more preferably 45 ⁇ m or less, and most preferably 40 ⁇ m or less. Further, it is preferably 1 ⁇ m or more, more preferably 5 ⁇ m or more, still more preferably 10 ⁇ m or more, and even more preferably 20 ⁇ m or more.
- the thickness df of the first low-dielectric layer and the thickness df'of the second low-dielectric layer are , Both may be in the thick range, both may be in the thin range, one may be in the thick range, and the other may be in the thin range.
- the thickness of each low-dielectric layer depends on the mode and application of the antenna system. And the size in the plane direction may be the same or different from each other.
- the thickness ratio of the thick low-dielectric layer to the thin low-dielectric layer (df / df'however, df> df') is from 3/1 to It may be 30/1, preferably 4/1 to 20/1.
- a laminated glass interlayer film is hollowed out to fill the step, or a step is formed. It is possible to make a laminated glass without using a spacer for filling the glass.
- the total thickness da of the low-dielectric layer is 0.1 to 1. It may be about 40 mm, preferably about 0.5 to 30 mm, and more preferably about 1.0 to 25 mm.
- the low dielectric layer is not particularly limited as long as it has a predetermined dielectric constant and can be adjacent to the first glass layer, and is formed from, for example, a thermoplastic resin or a thermosetting resin having a predetermined dielectric constant. May be good.
- adjacent means that the objects are in close contact with each other on the adjacent surface of the object, or the incident rate of high frequencies is set to the same level (for example, in the range of about ⁇ 10% in the case of close contact). It means that they are close to each other as long as they are kept.
- the low-dielectric layer itself has adhesiveness. It is preferably a layer.
- the low-dielectric layer may have adhesiveness to the first glass layer, may have adhesiveness to the antenna circuit board, and may have adhesiveness to both sides. Is preferable.
- the low-dielectric layer material When the low-dielectric layer has heat-sealing property, the low-dielectric layer material may be melted and the antenna circuit board and the first glass may be fused via the low-dielectric layer material.
- the solution of the low dielectric layer material dissolved in the solvent has adhesiveness, the low dielectric layer material solution is applied to the joint surface of the first glass and / or the antenna circuit board, and the antenna is passed through the low dielectric layer material.
- the circuit board and the first glass may be adhered to each other.
- fusion or adhesion hereinafter referred to as fusion or the like
- fusion or the like is preferably performed under degassing and / or reduced pressure from the viewpoint of preventing air from being mixed.
- Degassing may be performed by physically extruding air from the junction interface.
- the antenna circuit board and the first glass may be fused or the like under degassing and / or depressurization. ..
- the adhesive low dielectric layer examples include polyvinyl acetal resin, olefin-vinyl carboxylate copolymer resin, ionomer resin, and acrylic resin, which have good affinity for glass materials.
- the adhesive low-dielectric layer can be bonded by heat-bonding, it is possible to prevent the circuit from being broken or deformed during the bonding, and the glass base material is a curved surface of an automobile windshield or the like. Even if it is glass, it can follow and suppress foaming and peeling.
- an antenna system when forming an antenna system as a laminated glass in which a high-frequency antenna circuit board is embedded between glass substrates, it is possible to laminate the laminated glass under general manufacturing conditions, so that an extra step is omitted. can do.
- polyvinyl acetal resin examples include polyvinyl acetal resins produced by acetalizing vinyl alcohol-based resins such as polyvinyl alcohol and vinyl alcohol copolymers.
- the low dielectric layer contains a polyvinyl acetal resin, it may contain one kind of polyvinyl acetal resin, and is used for viscosity average degree of polymerization, acetalization degree, acetyl group amount, hydroxyl group amount, ethylene content, and acetalization. It may contain two or more polyvinyl acetal resins having different molecular weights and chain lengths of the aldehydes.
- the polyvinyl acetal resin contains two or more different polyvinyl acetal resins
- the two or more polyvinyl acetal resins having one or more different viscosity average degree of polymerization, acetalization degree, acetyl group amount, and hydroxyl group amount are used.
- a mixture is preferable from the viewpoint of ease of melt molding and the like.
- the polyvinyl acetal resin used in the present invention can be obtained by a known or conventional method. For example, an aldehyde (or keto compound) and an acid catalyst are added to an aqueous solution of polyvinyl alcohol or a vinyl alcohol copolymer to acetalize the resin. Make a reaction. Then, after filtering the reaction solution as necessary, a neutralizing agent such as alkali is added to neutralize the reaction solution, and the resin is filtered, washed with water and dried to obtain a polyvinyl acetal resin.
- a neutralizing agent such as alkali
- Polyvinyl alcohol can be obtained by saponifying a polyvinyl ester obtained by polymerizing a vinyl ester compound, and a vinyl alcohol copolymer can be obtained by saponifying a copolymer of a vinyl ester compound and another monomer. Obtainable.
- vinyl ester compound examples include vinyl acetate, 1-propenyl acetate, 1-methyl vinyl acetate, 1-butenyl acetate, 2-methyl-1-propenyl acetate, vinyl propionate, vinyl butanoate, vinyl pivalate, and versatic.
- These vinyl ester compounds can be used alone or in combination. Of these vinyl ester compounds, vinyl acetate is preferable from the viewpoint of productivity.
- Examples of other monomers include ⁇ -olefins such as ethylene, propylene, n-butyl and isobutylene; acrylate and salts thereof; methyl acrylate, ethyl acrylate, n-propyl acrylate, i-propyl acrylate and the like.
- Acrylic acid esters such as n-butyl acrylate, i-butyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, dodecyl acrylate, octadecyl acrylate; methacrylic acid and salts thereof; methyl methacrylate, methacryl Ethyl methacrylate, n-propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, i-butyl methacrylate, t-butyl methacrylate, 2-ethylhexyl methacrylate, dodecyl methacrylate, octadecyl methacrylate and the like.
- Esters ; acrylamide; N-methylacrylamide, N-ethylacrylamide, N, N-dimethylacrylamide, diacetoneacrylamide, acrylamidepropanesulfonic acid and its salts, acrylamidepropyldimethylamine and its salts or its quaternary salts, N-methylol Acrylamide derivatives such as acrylamide and derivatives thereof; methacrylamide, N-methylmethacrylate, N-ethylmethacrylate, methacrylamide propanesulfonic acid and its salts, methacrylamidepropyldimethylamine and its salts or quaternary salts thereof, N-methylol.
- Methacrylate derivatives such as methacrylicamide and derivatives thereof; vinyl ethers such as methylvinyl ether, ethyl vinyl ether, n-propyl vinyl ether, i-propyl vinyl ether, n-butyl vinyl ether, i-butyl vinyl ether, t-butyl vinyl ether, dodecyl vinyl ether, stearyl vinyl ether and the like.
- the acid catalyst used for the acetalization reaction is not particularly limited, and any organic acid or inorganic acid can be used, and examples thereof include acetic acid, paratoluenesulfonic acid, nitric acid, sulfuric acid, and hydrochloric acid. Of these, hydrochloric acid, sulfuric acid and nitric acid are preferable from the viewpoint of acid strength and ease of removal during washing.
- the aldehyde (or keto compound) used in the production of the polyvinyl acetal resin is preferably linear, branched or cyclic having 1 to 10 carbon atoms, and preferably linear or branched. More preferred. This results in a corresponding linear or branched acetal side chain.
- the polyvinyl acetal resin used in the present invention may be obtained by acetalizing polyvinyl alcohol or a vinyl alcohol copolymer with a mixture of a plurality of aldehydes (or keto compounds).
- the polyvinyl alcohol or the vinyl alcohol copolymer may be composed of only one of them, or may be a mixture of polyvinyl alcohol and a vinyl alcohol copolymer.
- aldehyde examples include formaldehyde, acetaldehyde, propionaldehyde, n-butyl aldehyde, isobutyl aldehyde, barrel aldehyde, isobarrel aldehyde, n-hexyl aldehyde, 2-ethyl butyl aldehyde, n-heptyl aldehyde, n-octyl aldehyde, and 2 Examples thereof include aliphatic, aromatic and alicyclic aldehydes such as ethylhexyl aldehyde, n-nonyl aldehyde, n-decyl aldehyde, benzaldehyde and cinnam aldehyde.
- aldehydes can be used alone or in combination of two or more. Further, a polyfunctional aldehyde or an aldehyde having another functional group may be used in combination in a range of 20% by mass or less of the total aldehyde.
- the content of n-butyraldehyde in the aldehyde used for acetalization is preferably 50% by mass or more, more preferably 80% by mass or more, further preferably 95% by mass or more, and 99% by mass.
- the above is particularly preferable, and it may be 100% by mass.
- the viscosity average degree of polymerization of polyvinyl alcohol, which is a raw material of the polyvinyl acetal resin is preferably 100 or more, more preferably 300 or more, more preferably 400 or more, further preferably 600 or more, particularly preferably 700 or more, and most preferably 750 or more.
- the viscosity average degree of polymerization of polyvinyl alcohol, which is a raw material of the polyvinyl acetal resin is preferably 500 or more, more preferably 900 or more.
- the viscosity average degree of polymerization of polyvinyl alcohol is preferably 5000 or less, more preferably 3000 or less, further preferably 2500 or less, particularly preferably 2300 or less, and most preferably 2000 or less.
- the viscosity average degree of polymerization of polyvinyl alcohol can be measured, for example, based on JIS K 6726 “Polyvinyl alcohol test method”.
- the viscosity average degree of polymerization of the polyvinyl acetal resin is the same as the viscosity average degree of polymerization of the raw material polyvinyl alcohol. Therefore, the preferable viscosity average degree of polymerization of the above-mentioned polyvinyl alcohol is the same as the preferred viscosity average degree of polymerization of the polyvinyl acetal resin. .. When two or more polyvinyl acetal resins having different low dielectric layers are contained, it is preferable that the viscosity average degree of polymerization of at least one polyvinyl acetal resin is at least the lower limit value and at least the upper limit value.
- the amount of acetyl group in the polyvinyl acetal resin constituting the low dielectric layer is preferably 0.01 to 20% by mass, more preferably 0.05 to 10% by mass, still more preferably, based on the ethylene unit of the polyvinyl acetal main chain. May be 0.1 to 5% by mass.
- the amount of acetyl groups in the polyvinyl acetal resin can be adjusted by appropriately adjusting the degree of saponification of the raw material polyvinyl alcohol or vinyl alcohol copolymer. When two or more polyvinyl acetal resins having different low dielectric layers are contained, the amount of acetyl groups of at least one polyvinyl acetal resin is preferably within the above range.
- the degree of acetalization of the polyvinyl acetal resin used in the present invention is not particularly limited, but is preferably 40 to 86 mol%, more preferably 45 to 82 mol%, further preferably 50 to 78 mol%, and particularly preferably 60 to 74 mol%. Preferably, 68-74 mol% is most preferred.
- the degree of acetalization of the polyvinyl acetal resin can be adjusted within the above range. When the degree of acetalization is within the above range, the compatibility between the polyvinyl acetal resin and the plasticizer is unlikely to decrease.
- the degree of acetalization of at least one polyvinyl acetal resin is within the above range.
- the amount of hydroxyl groups in the polyvinyl acetal resin is preferably 6 to 26% by mass, more preferably 12 to 24% by mass, more preferably 15 to 22% by mass, and particularly preferably 18 to 18 to 26% by mass, based on the ethylene unit of the polyvinyl acetal main chain. It is 21% by mass.
- the amount of aldehyde used when acetalizing the polyvinyl alcohol resin can be adjusted within the above range.
- the amount of hydroxyl groups of at least one polyvinyl acetal resin is within the above range.
- the polyvinyl acetal resin is usually composed of acetal group units, hydroxyl group units and acetyl group units, and the amount of each of these units is measured by, for example, JIS K 6728 "polyvinyl butyral test method" or nuclear magnetic resonance (NMR). it can.
- JIS K 6728 polyvinyl butyral test method
- NMR nuclear magnetic resonance
- the low-dielectric layer preferably contains uncrosslinked polyvinyl acetal from the viewpoint of easily obtaining good film forming properties, but it is also possible to contain crosslinked polyvinyl acetal.
- polyvinyl acetal may be cross-linked by thermal self-cross-linking with a carboxyl group-containing polyvinyl acetal or intermolecular cross-linking with polyaldehyde, glyoxylic acid or the like.
- the viscosity of the polyvinyl acetal resin can be appropriately set according to the type used. For example, when it is formed as a thin low dielectric layer, the viscosity is set to 20 ° C. using a Brookfield type (B type) viscometer.
- the viscosity of the polyvinyl acetal resin can be adjusted by using or using a polyvinyl acetal resin produced by using a polyvinyl alcohol-based resin having a high or low degree of polymerization average as a raw material or a part of the raw materials.
- the viscosity is the viscosity of such a mixture.
- the polyvinyl acetal resin may be combined with a known or commonly used plasticizer, if necessary.
- the plasticizer include the following plasticizers. These plasticizers may be used alone or in combination of two or more.
- a low-dielectric layer may be formed as a plasticized polyvinyl acetal resin composition composed of a plasticizer and a polyvinyl acetal resin.
- plasticizer for example, those shown below can be used.
- -Esters of polyvalent aliphatic or aromatic acids for example, dialkyl adipates (eg, dihexyl adipate, di-2-ethylbutyl adipate, dioctyl adipate, di-2-ethylhexyl adipate, hexylcyclohexyl adipate, mixture of heptyl adipate and nonyl adipate, diisononyl adipate, heptyl nonyl adipate); Esters of acids with alicyclic ester alcohols or alcohols containing ether compounds (eg di (butoxyethyl) adipate, di (butoxyethoxyethyl) adipate); dialkyl sebacates (eg dibutyl sebacate); sebacic acid and fat Esters with alcohols containing cyclic or ether compounds; esters of phthalates
- 1,2-Cyclohexanedicarboxylic acid diisononyl ester 1,2-Cyclohexanedicarboxylic acid diisononyl ester.
- -Esters or ethers of polyhydric aliphatic or aromatic alcohols or oligoether glycols having one or more aliphatic or aromatic substituents examples thereof include esters of glycerin, diglycol, triglycol, tetraglycol and the like with linear or branched aliphatic or alicyclic carboxylic acids. Specifically, diethylene glycol-bis- (2-ethylhexanoate), triethylene glycol-bis- (2-ethylhexanoate), triethylene glycol-bis- (2-ethylbutanoate), tetraethylene.
- Glycol-bis-n-heptanoate triethylene glycol-bis-n-heptanoate, triethylene glycol-bis-n-hexanoate, tetraethylene glycol dimethyl ether, and dipropylene glycol benzoate can be mentioned.
- -Liphatic or aromatic ester Alcoholic phosphate ester examples include tris (2-ethylhexyl) phosphate (TOF), triethyl phosphate, diphenyl-2-ethylhexyl phosphate, and tricresyl phosphate.
- TOF (2-ethylhexyl) phosphate
- TEZ triethyl phosphate
- diphenyl-2-ethylhexyl phosphate diphenyl-2-ethylhexyl phosphate
- tricresyl phosphate tricresyl phosphate.
- polyesters or oligoesters composed of polyhydric alcohols and polycarboxylic acids, terminal esterified products or etherified products thereof, polyesters or oligoesters composed of lactones or hydroxycarboxylic acids, terminal esterified products or etherified products thereof, etc. It may be used as a plasticizing agent.
- the content of the plasticizer may be, for example, 0 to 40% by mass, preferably 0 to 30% by mass, more preferably 0 to 15% by mass, and further, based on the total amount of the polyvinyl acetal resin and the plasticizer. It may be preferably 0 to 10% by mass, and even more preferably 0 to 5% by mass.
- a preferable polyvinyl acetal resin is marketed by Kuraray Co., Ltd. as “Mobital TM” or the like, and a polyvinyl acetal resin film is marketed by Kuraray Co., Ltd. as “Trosifol TM” or the like.
- a plasticizer is further applied to a film made of polyvinyl acetal resin or the like to plasticize the adhesiveness of the polyvinyl acetal resin. It may be enhanced by an agent.
- the above-mentioned plasticizer can be used, and the adhesiveness of the low dielectric layer can be improved. Therefore, triethylene glycol-bis- (2-ethylbutanoate), triethylene glycol.
- the olefin-vinyl carboxylate copolymer resin is not particularly limited as long as it has a dielectric constant lower than that of the first glass layer, and examples of the olefin include ethylene, propylene, n-butene, isobutylene, butadiene, and isoprene.
- examples of vinyl carboxylate include vinyl ester compounds exemplified in the section of polyvinyl acetal resin.
- an ethylene-vinyl acetate copolymer resin in which ethylene is used as the olefin and vinyl acetate is used as the vinyl carboxylic acid compound is preferable because the dielectric constant can be controlled and the adhesiveness is good.
- the olefin-vinyl carboxylate copolymer resin may be further copolymerized with a monomer as a third component as long as the dielectric constant can be controlled within a predetermined range.
- the monomer as the third component include acrylic acid esters, methacrylic acid esters, acrylamide and its derivatives, methacrylicamide and its derivatives, vinyl ethers, nitriles, and vinyl halides described in the section of polyvinyl acetal resin. , Vinylidene halides, allyl compounds, unsaturated carboxylic acids and derivatives thereof, vinylsilyl compounds and the like. These monomers can be used alone or in combination of two or more. When these other monomers are copolymerized, it is usually preferable to use these other monomers in a proportion of less than 10 mol% with respect to the vinyl carboxylate compound.
- the ratio of the vinyl carboxylate unit to the total of the olefin unit and the vinyl carboxylate unit is preferably less than 50 mol%, preferably 30 mol% or less. More preferably, 20 mol% or less is further preferable, and 15 mol% or less is particularly preferable.
- the lower limit of vinyl carboxylate is not particularly limited, but may be, for example, about 5 mol%.
- a preferred olefin-vinyl carboxylate copolymer resin is marketed as, for example, ethylene vinyl acetate by Tosoh Corporation as "Melsen TM".
- the ionomer resin is not particularly limited, but has a structural unit derived from an olefin such as ethylene and a structural unit derived from ⁇ , ⁇ -unsaturated carboxylic acid, and at least a part of ⁇ , ⁇ -unsaturated carboxylic acid is a metal.
- examples include thermoplastic resins neutralized by ions.
- the metal ion include an alkali metal ion such as sodium ion; an alkaline earth metal ion such as magnesium ion; and a zinc ion.
- the content of the structural unit of ⁇ , ⁇ -unsaturated carboxylic acid is the ethylene- ⁇ , ⁇ -unsaturated carboxylic acid. Based on the mass of the acid copolymer, 2% by mass or more is preferable, and 5% by mass or more is more preferable.
- the content of the constituent units of ⁇ , ⁇ -unsaturated carboxylic acid is preferably 30% by mass or less, more preferably 20% by mass or less.
- Examples of the structural unit derived from ⁇ , ⁇ -unsaturated carboxylic acid contained in the ionomer resin include a structural unit derived from acrylic acid, methacrylic acid, maleic acid, monomethyl maleate, monoethyl maleate, and maleic anhydride. Of these, structural units derived from acrylic acid or methacrylic acid are particularly preferable.
- the ionomer resin from the viewpoint of availability, the ionomer of the ethylene-acrylic acid copolymer and the ionomer of the ethylene-methacrylic acid copolymer are more preferable, and the zinc ionomer of the ethylene-acrylic acid copolymer and the ethylene-acrylic acid are used.
- Sodium ionomers, which are acid copolymers, zinc ionomers, which are ethylene-methacrylic acid copolymers, and sodium ionomers, which are ethylene-methacrylic acid copolymers, are particularly preferable.
- Ionomer resins can be used alone or in combination of two or more.
- a preferred ionomer resin film is marketed, for example, by Kuraray Co., Ltd. as "Centriglas TM".
- the acrylic resin is preferably a polymer obtained from an acrylic acid ester-based monomer and / or a methacrylate-based monomer, and the monomer is an alkyl such as methyl acrylate, ethyl acrylate, or n-propyl acrylate.
- Modified acrylate such as glycidyl acrylate and 2-hydroxyethyl acrylate
- Polyfunctional acrylate such as ethylene glycol diacrylate, polyethylene glycol diacrylate, polypropylene glycol diacrylate, neopentyl glycol diacrylate, pentaerythritot triacrylate; methyl methacrylate Alkyl methacrylates such as ethyl methacrylate and n-propyl methacrylate; modified methacrylates such as glycidyl methacrylate and 2-hydroxyethyl methacrylate; ethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, polypropylene glycol dimethacrylate, neopentyl glycol dimethacrylate, pentaerythri Examples thereof include polyfunctional methacrylate such as tottrimethacrylate. These monomers can be used alone or in combination of two or more.
- acrylic acid ester-based monomers and / or methacrylic acid ester-based monomers and unsaturated carboxylic acids such as acrylic acid and methacrylic acid; acrylamides such as N, N-dimethylacrylamide; styrene, ⁇ -methylstyrene.
- a copolymer with an aromatic vinyl compound such as the above can also be preferably used as an acrylic resin.
- acrylic resin a liquid injection type resin is marketed by Shinko Glass Industry Co., Ltd. as “3S resin” and the like.
- the low-dielectric layer may contain known or conventional additives, if necessary.
- Additives include, for example, solvents, plasticizers, UV absorbers, antioxidants, adhesion modifiers, whitening agents or optical brighteners, stabilizers, dyes, processing aids, organic or inorganic nanoparticles, calcined Kay. Examples include acids and surface activators. Additives can be used alone or in combination of two or more.
- the antenna circuit board includes at least one circuit layer and at least one high-frequency insulating layer, and its form is not particularly limited, and can be used as various high-frequency circuit boards by known or conventional means. ..
- the present invention also includes an antenna circuit board, and the antenna circuit board of the present invention can be usefully used in the antenna system of the present invention because of the high frequency characteristics derived from the high frequency insulating layer.
- the circuit layer may be formed of, for example, at least a conductive metal, and the circuit may be formed by using a known circuit processing method.
- the conductor forming the circuit layer may be various conductive metals such as gold, silver, copper, iron, nickel, aluminum or alloy metals thereof.
- the antenna circuit board may include a conductor layer such as a ground layer in addition to the circuit layer.
- the conductor layer may be composed of various conductive metals such as gold, silver, copper, iron, nickel, aluminum or alloy metals thereof.
- the conductors constituting the circuit layer and the conductor layer may be the same or different.
- the antenna circuit board may be used for various transmission lines, for example, known or conventional transmission lines such as coaxial lines, strip lines, microstrip lines, coplanar lines, parallel lines, and antennas (eg, microwaves or millimeters). It may be used for a wave antenna). Further, the circuit board may be used for an antenna device in which an antenna and a transmission line are integrated.
- known or conventional transmission lines such as coaxial lines, strip lines, microstrip lines, coplanar lines, parallel lines, and antennas (eg, microwaves or millimeters). It may be used for a wave antenna).
- the circuit board may be used for an antenna device in which an antenna and a transmission line are integrated.
- the antenna structure may have a known or conventional structure as long as a high-frequency insulating layer is used.
- a waveguide slot antenna, a horn antenna, a lens antenna, a chip antenna, a pattern antenna, a printed antenna, and a triplate examples include antennas, microstrip antennas, patch antennas, and other antennas that use millimeter waves or microwaves.
- the antenna circuit board (or semiconductor device mounting board) may be used for various sensors, particularly an in-vehicle radar.
- the antenna circuit board may be a multi-layer circuit board having a plurality of circuit layers and / or conductor layers. Further, the antenna circuit board may be a circuit board (or a semiconductor element mounting board) on which a semiconductor element (for example, an IC chip) is mounted.
- a semiconductor element for example, an IC chip
- the high frequency antenna circuit board may be capable of supporting data transmission speeds of 10 gigabits or more per second.
- the high-frequency antenna circuit board may be a circuit board compatible with 5G and the next generation.
- the antenna circuit board includes a high frequency insulating layer.
- the high-frequency insulating layer is not particularly limited as long as it is an insulating layer capable of reducing transmission loss of electric signals in a high-frequency circuit, and is, for example, thermoplastic liquid crystal polymer (LCP), polyimide (PI) (particularly modified polyimide (MPI)). )), An insulating layer made of a heat-resistant resin such as polyethylene naphthalate (PEN) and polyetheretherketone (PEEK) can be mentioned. Among them, the insulating layer made of polyimide is preferably adopted because it has excellent heat resistance and chemical resistance. Further, in terms of excellent dielectric properties, a thermoplastic liquid crystal polymer is preferably adopted.
- the insulating layer may be formed of a thermoplastic liquid crystal polymer film or a polyimide film, and in that case, a circuit layer or the like may be arranged on the thermoplastic liquid crystal polymer film or the polyimide film to obtain an antenna circuit board. it can.
- the permittivity ⁇ p in both one direction and the direction orthogonal to the plane of the high frequency insulating layer may be 2.0 to 4.0, preferably 2.2 to 3.5, at a frequency of 28 GHz, for example. More preferably, it may be 2.4 to 3.0.
- the dielectric loss tangent tan ⁇ p in both one direction and the direction perpendicular to the plane of the high frequency insulating layer may be 0.010 or less, preferably 0.005 or less, more preferably 0.003, for example, at a frequency of 28 GHz. It may be as follows.
- the dielectric property is a value measured by the above-mentioned method.
- an insulating layer made of polyimide (hereinafter, may be referred to as a polyimide insulating layer) is preferable.
- the polyimide is not particularly limited as long as it is a polymer having an imide group in the structural unit, but for example, a polyimide resin such as polyimide, polyamideimide, polybenzimidazole, polyimide ester, polyetherimide, or polysiloxaneimide. Can be mentioned.
- Polyimide can be formed by imidizing (curing) the precursor polyamic acid.
- Polyamic acid can be synthesized by reacting a known diamine with a tetracarboxylic dian (including an acid anhydride thereof) in the presence of a solvent.
- a tetracarboxylic dian including an acid anhydride thereof
- the diamine aromatic diamines, aliphatic diamines, alicyclic diamines and the like can be used, and aromatic diamines are preferable from the viewpoint of heat resistance.
- the aromatic diamine include 4,4'-diaminodiphenyl ether, 2'-methoxy-4,4'-diaminobenzanilide, 1,4-bis (4-aminophenoxy) benzene, and 1,3-bis (4).
- tetracarboxylic acid aromatic tetracarboxylic acid, aliphatic tetracarboxylic acid, alicyclic tetracarboxylic acid, acid anhydrides thereof and the like can be used, and from the viewpoint of heat resistance, aromatic tetracarboxylic acid.
- An anhydride is preferred.
- aromatic tetracarboxylic dianhydride include pyromellitic anhydride, 3,3', 4,4'-biphenyltetracarboxylic dianhydride, and 3,3', 4,4'-diphenylsulphontetracarboxylic acid. Examples thereof include dianhydride and 4,4'-oxydiphthalic anhydride. These diamines and tetracarboxylic acids can be used alone or in combination of two or more.
- polyimide film used for the polyimide insulating layer for example, a solution of polyamic acid (polyimide precursor) obtained by reacting diamine and tetracarboxylic acid was applied to a support and dried to obtain a polyamic acid film. After that, it can be produced by heat treatment and curing (imidization).
- polyamic acid solution known coating methods such as spin coating, comma coater, screen printing method, slit coating, roll coating, knife coating, dip coating, and die coating can be used.
- additives, fillers, etc. may be added to the polyimide film as long as the effects of the present invention are not impaired.
- polyimide film examples include Kapton EN, Kapton H, and Kapton V (trade names) manufactured by Toray DuPont Co., Ltd., Apical NPI (trade name) manufactured by Kaneka Co., Ltd., and Upirex S (trade name) manufactured by Ube Industries, Ltd. It is marketed as a product name).
- thermoplastic liquid crystal polymer insulating layer made of a thermoplastic liquid crystal polymer (hereinafter, may be referred to as a thermoplastic liquid crystal polymer insulating layer) is preferable.
- the thermoplastic liquid crystal polymer film used for the thermoplastic liquid crystal polymer insulating layer is formed from a liquid crystal polymer that can be melt-molded.
- the thermoplastic liquid crystal polymer is a polymer capable of forming an optically anisotropic molten phase, and the chemical composition thereof is not particularly limited as long as it is a liquid crystal polymer that can be melt-molded. , Thermoplastic liquid crystal polyester, or thermoplastic liquid crystal polyester amide in which an amide bond is introduced therein.
- thermoplastic liquid crystal polymer may be a polymer in which an imide bond, a carbonate bond, an isocyanate-derived bond such as a carbodiimide bond or an isocyanurate bond is further introduced into an aromatic polyester or an aromatic polyester amide.
- thermoplastic liquid crystal polymer used in the present invention include known thermoplastic liquid crystal polyesters and thermoplastic liquid crystal polyesteramides derived from the compounds classified into (1) to (4) and their derivatives exemplified below. Can be mentioned. However, it goes without saying that there is an appropriate range in the combination of various raw material compounds in order to form a polymer capable of forming an optically anisotropic molten phase.
- Aromatic or aliphatic dihydroxy compounds (see Table 1 for typical examples)
- Aromatic diamine, aromatic hydroxyamine or aromatic aminocarboxylic acid (see Table 4 for typical examples).
- thermoplastic liquid crystal polymers obtained from these raw material compounds include copolymers having the structural units shown in Tables 5 and 6.
- a polymer containing p-hydroxybenzoic acid and / or 6-hydroxy-2-naphthoic acid as at least a repeating unit is preferable, and (i) p-hydroxybenzoic acid and 6-hydroxy-are particularly preferable.
- a copolymer containing a repeating unit of an aromatic diol and / or an aromatic hydroxyamine and at least one aromatic dicarboxylic acid is preferred.
- the repeating unit (A) of p-hydroxybenzoic acid contains at least a repeating unit of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid
- At least one aromatic hydroxycarboxylic acid (C) selected from the group consisting of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid and 4,4'-dihydroxy.
- the molar ratio of the repeating unit derived from 6-hydroxy-2-naphthoic acid in the aromatic hydroxycarboxylic acid (C) may be, for example, 85 mol% or more, preferably 90 mol% or more, and more. It may be preferably 95 mol% or more.
- the molar ratio of the repeating unit derived from 2,6-naphthalenedicarboxylic acid in the aromatic dicarboxylic acid (E) may be, for example, 85 mol% or more, preferably 90 mol% or more, and more preferably 95 mol%. It may be% or more.
- optically anisotropic molten phase referred to in the present invention can be formed can be determined, for example, by placing the sample on a hot stage, heating the sample in a nitrogen atmosphere, and observing the transmitted light of the sample. ..
- the thermoplastic liquid crystal polymer preferably has a melting point (hereinafter referred to as Tm0) in the range of 200 to 360 ° C., preferably in the range of 240 to 360 ° C., and more preferably in the range of 260 to 360 ° C. More preferably, Tm0 is 270 to 350 ° C.
- Tm0 is obtained by measuring the temperature at which the main endothermic peak appears with a differential scanning calorimeter (DSC, Shimadzu Corporation). That is, after heating the thermoplastic liquid crystal polymer sample at a rate of 10 ° C./min to completely melt it, the melt is cooled to 50 ° C. at a rate of 10 ° C./min and then raised again at a rate of 10 ° C./min. The position of the endothermic peak that appears after heating is determined as the melting point of the thermoplastic liquid crystal polymer sample.
- DSC differential scanning calorimeter
- thermoplastic liquid crystal polymer includes thermoplastic polymers such as polyethylene terephthalate, modified polyethylene terephthalate, polyolefin, polycarbonate, polyarylate, polyamide, polyphenylene sulfide, polyetheretherketone, and fluororesin, as long as the effects of the present invention are not impaired. , Various additives, fillers and the like may be added.
- thermoplastic liquid crystal polymer film is obtained, for example, by extrusion molding the melt-kneaded product of the thermoplastic liquid crystal polymer. Any method is used as the extrusion molding method, but the well-known T-die method, inflation method and the like are industrially advantageous.
- the inflation method stress is applied not only in the mechanical axis direction (hereinafter abbreviated as MD direction) of the thermoplastic liquid crystal polymer film but also in the direction orthogonal to this (hereinafter abbreviated as TD direction), and the MD direction and TD direction are applied. Since it can be uniformly stretched in the direction, a thermoplastic liquid crystal polymer film having controlled molecular orientation, dielectric properties, etc. in the MD direction and the TD direction can be obtained.
- MD direction mechanical axis direction
- TD direction direction orthogonal to this
- thermoplastic liquid crystal polymer film may be a known or conventional heat treatment to adjust the melting point and / or the coefficient of thermal expansion of the thermoplastic liquid crystal polymer film.
- the heat treatment conditions can be appropriately set according to the purpose.
- the melting point (Tm 0 ) of the thermoplastic liquid crystal polymer is -10 ° C or higher (for example, Tm 0-10 ° C to Tm 0 + 30 ° C, preferably Tm 0 ° C to Tm 0).
- the melting point (Tm) of the thermoplastic liquid crystal polymer film may be raised by heating at (about + 20 ° C.) for several hours.
- thermoplastic liquid crystal polymer film By providing a circuit layer and / or a conductor layer on the obtained thermoplastic liquid crystal polymer film by a known or conventional method, it is possible to manufacture an antenna circuit board having a thermoplastic liquid crystal polymer insulating layer.
- the melting point (Tm) of the thermoplastic liquid crystal polymer insulating layer may be, for example, 200 to 380 ° C., preferably 240 to 370 ° C.
- the melting point (Tm) of the thermoplastic liquid crystal polymer insulating layer can be obtained by observing the thermal behavior of the sample obtained from the thermoplastic liquid crystal polymer insulating layer (or the thermoplastic liquid crystal polymer film) using a differential scanning calorimeter. Can be done. That is, the position of the endothermic peak that appears when the temperature of the thermoplastic liquid crystal polymer film sample is raised at a rate of 10 ° C./min can be determined as the melting point (Tm) of the thermoplastic liquid crystal polymer film.
- the thermoplastic liquid crystal polymer insulating layer has, for example, a coefficient of thermal expansion of 0 to 25 ppm / ° C., and the coefficient of thermal expansion may be preferably about 5 to 22 ppm / ° C.
- the coefficient of thermal expansion is increased from 25 ° C. to 200 ° C. at a rate of 5 ° C./min using a thermomechanical analyzer (TMA), cooled to 30 ° C. at a rate of 20 ° C./min, and again. It can be grasped as a value measured between 30 ° C. and 150 ° C. when the temperature is raised at a rate of 5 ° C./min.
- TMA thermomechanical analyzer
- the thickness of the antenna circuit board was measured using a micrometer (manufactured by Mitutoyo Co., Ltd., model 227-201-CLM-15QM).
- the thickness of the low-dielectric layer was measured using a film used as the low-dielectric layer.
- the thickness of the low dielectric layer is obtained by measuring the thickness of the entire antenna system and the antenna circuit board and glass in the antenna system, and dividing the thickness of the antenna circuit board and glass from the thickness of the entire antenna system. You may.
- Example 1 ⁇ Manufacturing of antenna circuit board> Thermoplastic liquid crystal polymer film (manufactured by Kuraray Co., Ltd., Vexter (registered trademark), thickness 50 ⁇ m, dielectric constant in the X direction: 3.4, dielectric constant in the Y direction: 3.4, dielectric loss tangent in the X direction: 0.002, Y Copper foil (manufactured by Fukuda Metal Foil Powder Industry Co., Ltd., electrolytic copper foil "H9A", thickness 12 ⁇ m) is superposed on both sides of the dielectric loss tangent: 0.002), and the heating plate is heated to 290 ° C. using a vacuum heat press device.
- Thermoplastic liquid crystal polymer film manufactured by Kuraray Co., Ltd., Vexter (registered trademark)
- Y Copper foil manufactured by Fukuda Metal Foil Powder Industry Co., Ltd., electrolytic copper foil "H9A", thickness 12 ⁇ m
- the obtained pellets are melt-extruded using a single-screw extruder and a T-die, and a 50 ⁇ m-thick polyvinyl acetal resin film with a smooth surface using a metal elastic roll (dielectric constant in the X direction: 2.5, in the Y direction).
- Dielectric constant 2.5, dielectric loss tangent in the X direction: 0.01, dielectric loss tangent in the Y direction: 0.01, plasticizer content: 0% by mass, resin viscosity: 245 mPa ⁇ s) were obtained.
- the prepared antenna circuit board (length 5 cm, width 5 cm), a Teflon (registered trademark) sheet with one-sided embossing, and an upper glass having a length of 5 cm, a width of 5 cm, and a thickness of 3 mm were stacked and fixed in this order.
- the polyvinyl acetal resin film, the antenna circuit board, and the upper glass were aligned so as to overlap each other.
- the Teflon (registered trademark) sheet adjacent to the polyvinyl acetal resin film was arranged so that the embossed surface was in contact with the polyvinyl acetal resin film.
- the Teflon (registered trademark) sheet adjacent to the antenna circuit board was arranged so that the mirror surface was in contact with the antenna circuit board.
- the antenna circuit board was arranged so that the surface having the circuit was in contact with the polyvinyl acetal resin film.
- the polyvinyl acetal resin film (low dielectric layer) / circuit (circuit layer) / antenna circuit board inner layer (multilayer board with a thermoplastic liquid crystal polymer film as an insulating layer) A laminated body was prepared in which the copper foil (conductor layer) was laminated in this order.
- the antenna circuit board was arranged in a region of 2 cm or more and 7 cm or less inward from the vertical end of the lower glass. Further, the laminated body and the upper glass were aligned so as to overlap each other. These are heated under vacuum with a vacuum laminator device at 140 ° C. for 15 minutes, the upper chamber is set to -10 kPa (differential pressure from the lower chamber is about 90 kPa), held for 15 minutes, and then returned to normal pressure to Teflon (registered trademark).
- glass (first glass layer) / polyvinyl acetal resin film (low dielectric layer) / circuit (circuit layer) / antenna circuit board inner layer (multilayer board with thermoplastic liquid crystal polymer film as an insulating layer) ) / Copper foil (conductor layer) was laminated in this order, and an antenna system in which an antenna circuit board was arranged on a part of glass was obtained.
- the obtained antenna system no partial peeling or foaming was observed, and no disconnection or deformation of the circuit was observed.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 2 ⁇ Manufacturing of antenna system> Length 20 cm, width 10 cm, thickness 3 mm, permittivity in the X direction: 6.5, permittivity in the Y direction: 6.5, dielectric loss tangent in the X direction: 0.01, dielectric loss tangent in the Y direction: 0.01
- the laminate (length 5 cm, width 5 cm) obtained in Example 1 was laminated on the lower glass so that the polyvinyl acetal resin film (low dielectric layer) was in contact with the lower glass, and the laminate was placed on top of the laminate (5 cm in length and 5 cm in width).
- the prepared polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m, and a thin glass plate having a length of 5 cm, a width of 5 cm, and a thickness of 1 mm were laminated and fixed in this order.
- the antenna circuit board was arranged in a region of 2 cm or more and 7 cm or less inward from the vertical end of the lower glass. Further, the laminated body and the thin glass plate were aligned so as to overlap each other. These are heated under vacuum with a vacuum laminator device at 140 ° C.
- the upper chamber is set to -10 kPa (differential pressure from the lower chamber is about 90 kPa), held for 15 minutes, and then returned to normal pressure to make glass (first).
- An antenna system was obtained in which (low dielectric layer) / thin glass (protective layer) was laminated in this order, and an antenna circuit board with a protective glass plate was arranged on a part of the glass.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 3 ⁇ Manufacturing of laminated body> A Teflon (registered trademark) sheet with single-sided embossing on glass having a length of 20 cm, a width of 10 cm, and a thickness of 3 mm, a dried polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m prepared in Example 1, Examples.
- the glasses were stacked and fixed in this order.
- the polyvinyl acetal resin film, the antenna circuit board, and the thin glass were aligned so as to overlap each other.
- the Teflon (registered trademark) sheet was arranged so that the embossed surface was in contact with the polyvinyl acetal resin film.
- the antenna circuit board was arranged so that the surface having the circuit was in contact with the polyvinyl acetal resin film adjacent to the Teflon (registered trademark) sheet.
- acetal resin film (low dielectric layer) / thin plate glass (protective layer) was laminated in this order was produced.
- the upper chamber is set to -10 kPa (differential pressure from the lower chamber is about 90 kPa), held for 15 minutes, and then returned to normal pressure to make glass (first).
- An antenna system was obtained in which (low dielectric layer) / thin glass (protective layer) was laminated in this order, and an antenna circuit board with a protective glass plate was arranged on a part of the glass.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 4 ⁇ Manufacturing of laminated body> A Teflon (registered trademark) sheet with single-sided embossing on a lower glass having a length of 20 cm, a width of 10 cm, and a thickness of 3 mm, and a dried polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m prepared in Example 1. Antenna circuit board (length 5 cm, width 5 cm) prepared in Example 1, dried polyvinyl acetal resin film prepared in Example 1, length 5 cm, width 5 cm, thickness 50 ⁇ m, Teflon (registered trademark) sheet with single-sided embossing.
- the Teflon (registered trademark) sheet was arranged so that the embossed surface was in contact with the polyvinyl acetal resin film.
- the antenna circuit board was arranged so that the surface having the circuit was in contact with the polyvinyl acetal resin film on the lower glass side.
- a laminate was produced in which the order of / copper foil (conductor layer) / polyvinyl acetal resin film (low dielectric layer) was laminated.
- the laminate (length 5 cm, width 5 cm) is laminated on the glass so that the polyvinyl acetal resin film (low dielectric layer) adjacent to the circuit layer is in contact with the glass, and the laminate is 5 cm long, 5 cm wide, and 1 mm thick.
- the thin glass plates of No. 1 were stacked and fixed.
- the antenna circuit board was arranged in a region of 2 cm or more and 7 cm or less inward from the vertical end of the glass.
- the laminated body and the thin glass plate were aligned so as to overlap each other. These are heated under vacuum with a vacuum laminator device at 140 ° C. for 15 minutes, the upper chamber is set to -10 kPa (differential pressure from the lower chamber is about 90 kPa), held for 15 minutes, and then returned to normal pressure to make glass (first).
- Example 5 ⁇ Manufacturing of laminated body> Instead of a polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m, a polyvinyl butyral resin (28.8% by mass of hydroxyl groups, 1700% of viscosity average polymerization) and 72% by mass of triethylene glycol-bis- (2-ethyl).
- Example 6 ⁇ Manufacturing of antenna system>
- the laminate of Example 5 was used instead of the laminate of Example 1, and the polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m was replaced with the polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m.
- the inner layer of the antenna circuit board (multilayer board with a thermoplastic liquid crystal polymer film as an insulating layer) / copper foil (conductor layer) / plasticized polyvinyl acetal resin film (low dielectric layer) / thin glass (protective layer) are laminated in this order.
- Example 7 ⁇ Manufacturing of laminated body> Instead of a polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m, an ionomer resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m (Sentry Glass (registered trademark) SG5000 manufactured by Kuraray Co., Ltd. is thinned by hot pressing). , X-direction dielectric constant: 2.2, Y-direction dielectric constant: 2.2, X-direction dielectric loss tangent: 0.002, Y-direction dielectric loss tangent: 0.002), in the same manner as in Example 1. Ionomer resin film (low dielectric layer) / circuit (circuit layer) / antenna circuit board inner layer (multilayer board with thermoplastic liquid crystal polymer film as insulating layer) / copper foil (conductor layer) did.
- Antenna circuit board inner layer multilayer board with thermoplastic liquid crystal polymer film as insulating layer
- Copper foil conductor layer
- Ionomer resin film low dielectric layer
- Thin glass protection layer
- Example 8 ⁇ Manufacturing of laminated body> A polyvinyl acetal resin film (low) in the same manner as in Example 1 except that a polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 30 ⁇ m is used instead of the polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m.
- the polyvinyl acetal resin film having a thickness of 30 ⁇ m is composed of the same polyvinyl acetal resin as the polyvinyl acetal resin film produced in Example 1, it is presumed to have the same dielectric constant.
- the low-dielectric layer has a dielectric constant smaller than that of glass, it is presumed that the high frequency incident on the glass can pass through the low-dielectric layer and reach the antenna circuit board.
- Example 9 ⁇ Manufacturing of antenna system> Length 20 cm, width 10 cm, thickness 3 mm, permittivity in the X direction: 6.5, permittivity in the Y direction: 6.5, dielectric loss tangent in the X direction: 0.01, dielectric loss tangent in the Y direction: 0.01
- the dried polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m prepared in Example 1, an antenna circuit substrate (length 5 cm, width 5 cm) prepared in Example 1, and Teflon (registered trademark).
- the sheet and the upper glass having a length of 5 cm, a width of 5 cm, and a thickness of 3 mm were stacked and fixed in this order.
- the antenna circuit board was arranged so that the surface having the circuit was in contact with the polyvinyl acetal resin film.
- the polyvinyl acetal resin film, the antenna circuit board, and the upper glass were aligned so as to overlap each other. These are heated under vacuum with a vacuum laminator device at 140 ° C. for 15 minutes, the upper chamber is set to -10 kPa (differential pressure from the lower chamber is about 90 kPa), held for 15 minutes, and then returned to normal pressure to Teflon (registered trademark).
- glass (first glass layer) / polyvinyl acetal resin film (low dielectric layer) / circuit (circuit layer) / antenna circuit board inner layer (multilayer board with thermoplastic liquid crystal polymer film as an insulating layer) ) / Copper foil (conductor layer) was laminated in this order, and an antenna system in which an antenna circuit board was arranged on a part of glass was obtained.
- the obtained antenna system no partial peeling or foaming was observed, and no disconnection or deformation of the circuit was observed.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 10 ⁇ Manufacturing of antenna system> Length 20 cm, width 10 cm, thickness 3 mm, permittivity in the X direction: 6.5, permittivity in the Y direction: 6.5, dielectric loss tangent in the X direction: 0.01, dielectric loss tangent in the Y direction: 0.01
- a dry polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m prepared in Example 1, an antenna circuit substrate (length 5 cm, width 5 cm) prepared in Example 1, and Example 1.
- the produced dried polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m, and a thin glass plate having a length of 5 cm, a width of 5 cm, and a thickness of 1 mm were laminated and fixed in this order.
- the antenna circuit board was arranged so that the surface having the circuit was in contact with the polyvinyl acetal resin film on the lower glass side.
- the antenna circuit board was arranged in a region of 2 cm or more and 7 cm or less inward from the vertical end of the lower glass. Further, the antenna circuit board, the two polyvinyl acetal resin films, and the thin glass were aligned so as to overlap each other.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 11 ⁇ Manufacturing of antenna system> Example 9 except that the plasticized polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 0.38 mm used in Example 5 was used instead of the polyvinyl acetal resin film having a length of 5 cm, a width of 5 cm, and a thickness of 50 ⁇ m.
- glass first glass layer
- plasticized polyvinyl acetal resin film low dielectric layer
- circuit circuit layer
- antenna circuit substrate inner layer multilayer substrate with thermoplastic liquid crystal polymer film as an insulating layer
- An antenna system was obtained in which copper foils (conductor layers) were laminated in this order and an antenna circuit board was arranged on a part of glass.
- the obtained antenna system no partial peeling or foaming was observed, and no disconnection or deformation of the circuit was observed.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 12 ⁇ Manufacturing of antenna system> Length 20 cm, width 10 cm, thickness 3 mm, permittivity in the X direction: 6.5, permittivity in the Y direction: 6.5, dielectric loss tangent in the X direction: 0.01, dielectric loss tangent in the Y direction: 0.01
- the dried plasticized polyvinyl acetal resin film of 7 cm in length, 7 cm in width, and 0.38 mm in thickness used in Example 5
- the antenna circuit substrate produced in Example 1 in the center of the plasticized polyvinyl acetal resin film The dried polyvinyl acetal resin film having a length of 7 cm, a width of 7 cm, and a thickness of 50 ⁇ m prepared in Example 1 and a thin glass having a length of 7 cm, a width of 7 cm, and a thickness of 1 mm were laminated and fixed in this order.
- the antenna circuit board was arranged so that the surface having the circuit was in contact with the plasticized polyvinyl acetal resin film.
- the antenna circuit board was arranged in a region of 2 cm or more and 7 cm or less inward from the vertical end of the glass. Further, the two polyvinyl acetal resin films and the thin glass were aligned so as to overlap each other. Put these in a vacuum bag, reduce the pressure at room temperature for 15 minutes, raise the temperature to 100 ° C with the reduced pressure and hold for 30 minutes, then lower the temperature to release the reduced pressure, temporarily crimp, and then put it in the autoclave.
- first glass layer plasticized polyvinyl acetal resin film (low dielectric layer) / circuit (circuit layer) / antenna circuit substrate inner layer (thermoplastic liquid crystal polymer film).
- Multilayer substrate as an insulating layer) / Copper foil (conductor layer) / Polyvinyl acetal resin film (low dielectric layer) / Thin glass (protective layer) are laminated in this order, and an antenna circuit substrate with a protective glass plate is part of the glass. Obtained an antenna system in which In the obtained antenna system, no partial peeling or foaming was observed, and no disconnection or deformation of the circuit was observed. Further, in the obtained antenna system, since the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 13 ⁇ Manufacturing of antenna system> Length 30 cm, width 30 cm, thickness 3 mm, dielectric constant in the X direction: 6.5, dielectric constant in the Y direction: 6.5, dielectric loss tangent in the X direction: 0.01, dielectric loss tangent in the Y direction: 0.01
- the laminate obtained in Example 1 was laminated on the lower glass so that the polyvinyl acetal resin film (low dielectric layer) was in contact with the lower glass, and the polyvinyl butyral resin (hydroxyl amount 28.8 mass) was placed on the laminate.
- Viscosity average polymerization degree 1700 72% by mass and triethylene glycol-bis- (2-ethylhexanoate) 28% by mass, a plasticized polyvinyl acetal resin having a length of 30 cm, a width of 30 cm, and a thickness of 0.76 mm.
- the interlayer film and the upper glass having a length of 30 cm, a width of 30 cm, and a thickness of 3 mm were laminated and fixed in this order.
- the antenna circuit board was arranged in the center of the lower glass in the surface direction.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 14 ⁇ Manufacturing of antenna system> Length 30 cm, width 30 cm, thickness 3 mm, permittivity in X direction: 6.5, permittivity in Y direction: 6.5, dielectric loss tangent in X direction: 0.01, dielectric loss tangent in Y direction: 0.01
- the dried polyvinyl acetal resin film having a length of 7 cm, a width of 7 cm, and a thickness of 50 ⁇ m prepared in Example 1 was laminated on the lower glass, and the antenna circuit substrate (length 5 cm) prepared in Example 1 was placed in the center of the polyvinyl acetal resin film.
- the upper glass was stacked and fixed in this order.
- the antenna circuit board was arranged so that the surface having the circuit was in contact with the polyvinyl acetal resin film.
- the antenna circuit board was arranged in the center of the lower glass in the surface direction. Put these in a vacuum bag, reduce the pressure at room temperature for 15 minutes, raise the temperature to 100 ° C with reduced pressure and hold for 30 minutes, then lower the temperature to release the reduced pressure, temporarily crimp, and then put it in the autoclave.
- first glass layer polyvinyl acetal resin film
- circuit layer circuit layer
- antenna circuit substrate inner layer thermoplastic liquid crystal polymer film
- Multilayer substrate with an insulating layer copper foil (conductor layer) / plasticized polyvinyl acetal resin interlayer film (second low-dielectric layer) / glass (second glass layer) are laminated in this order, and the inside of the laminated glass
- An antenna system in which the antenna circuit board was sealed was obtained. In the obtained antenna system, no foaming or large optical unevenness was observed around the antenna circuit. Further, in the obtained antenna system, since the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 15 ⁇ Manufacturing of antenna system> Length 30 cm, width 30 cm, thickness 3 mm, permittivity in the X direction: 6.5, permittivity in the Y direction: 6.5, dielectric loss tangent in the X direction: 0.01, dielectric loss tangent in the Y direction: 0.01
- An ionomer resin film (manufactured by Kuraray Co., Ltd., SentryGlas® SG5000) thinned by hot pressing on the lower glass, 7 cm long, 7 cm wide, and 50 ⁇ m thick, dielectric constant in the X direction: 2.2, The permittivity in the Y direction: 2.2, the dielectric loss tangent in the X direction: 0.002, the dielectric loss tangent in the Y direction: 0.002) are overlapped, and the antenna circuit board (length 5 cm, width 5 cm) produced in Example 1 is placed in the center of the polyvinyl acetal resin film.
- a dried ionomer resin interlayer film manufactured by Kuraray Co., Ltd., SentryGlas® SG5000 having a length of 30 cm, a width of 30 cm, and a thickness of 890 ⁇ m, and a length of 30 cm, a width of 30 cm, and a thickness of 30 cm are placed.
- the 3 mm upper glass was stacked and fixed in this order.
- the antenna circuit board was arranged so that the surface having the circuit was in contact with the ionomer resin film.
- the antenna circuit board was arranged in the center of the lower glass in the surface direction.
- first glass layer / ionomer resin film (first low dielectric layer) / circuit (circuit layer) / antenna circuit substrate inner layer (thermoplastic liquid crystal polymer film).
- Multilayer substrate as an insulating layer) / Copper foil (conductor layer) / Ionomer resin interlayer film (second low dielectric layer) / glass (second glass layer) are laminated in this order, and an antenna circuit substrate is inside the laminated glass.
- a sealed antenna system was obtained.
- the obtained antenna system no foaming or large optical unevenness was observed around the antenna circuit.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 16 ⁇ Manufacturing of antenna system> An appropriate amount of triethylene glycol-di (2-ethylhexanoate) was applied to the surface of the polyvinyl acetal resin film of the laminate obtained in Example 1, and the length was 20 cm, the width was 10 cm, the thickness was 3 mm, and the dielectric in the X direction.
- the glass was laminated on a glass having a rate of 6.5, a dielectric constant in the Y direction: 6.5, a dielectric loss tangent in the X direction: 0.01, and a dielectric loss tangent in the Y direction: 0.01 so as not to allow air to enter.
- the antenna circuit board was arranged in a region of 2 cm or more and 7 cm or less inward from the vertical end of the glass.
- glass first glass layer
- polyvinyl acetal resin film low dielectric layer
- circuit circuit layer
- antenna circuit board inner layer thermoplastic liquid crystal polymer
- An antenna system was obtained in which a multi-layer substrate having a film as an insulating layer) / a copper foil (conductor layer) were laminated in this order, and an antenna circuit board was arranged on a part of glass. No film misalignment was observed when shearing force was applied to the resulting antenna system. Further, in the obtained antenna system, since the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 17 ⁇ Manufacturing of antenna system> An appropriate amount of triethylene glycol-di (2-ethylhexanoate) was applied to the surface of the polyvinyl acetal resin film of the laminate obtained in Example 3, and the length was 20 cm, the width was 10 cm, the thickness was 3 mm, and the dielectric in the X direction.
- the glass was laminated on a glass having a rate of 6.5, a dielectric constant in the Y direction: 6.5, a dielectric loss tangent in the X direction: 0.01, and a dielectric loss tangent in the Y direction: 0.01 so as not to allow air to enter.
- the antenna circuit board was arranged in a region of 2 cm or more and 7 cm or less inward from the vertical end of the glass.
- glass first glass layer
- polyvinyl acetal resin film low dielectric layer
- circuit circuit layer
- antenna circuit board inner layer thermoplastic liquid crystal polymer
- a multilayer substrate with a film as an insulating layer) / copper foil (conductor layer) / polyvinyl acetal resin film (low dielectric layer) / thin glass (protective layer) are laminated in this order, and an antenna with a protective glass plate is attached to a part of the glass.
- An antenna system in which a circuit board was arranged was obtained.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 18 ⁇ Manufacturing of antenna system> Glass (first glass layer) / polyvinyl acetal resin film (low dielectric) in the same manner as in Example 17 except that dibutoxyethyl adipate was used instead of triethylene glycol-di- (2-ethylhexanoate).
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 19 ⁇ Manufacturing of antenna system> Glass (first glass layer) / polyvinyl acetal resin film (low dielectric layer) / circuit (circuit layer) / in the same manner as in Example 17 except that the heating in the hot air dryer was changed to 30 ° C. for 24 hours.
- the inner layer of the antenna circuit board multilayer board with a thermoplastic liquid crystal polymer film as an insulating layer) / copper foil (conductor layer) / polyvinyl acetal resin film (low dielectric layer) / thin glass (protective layer) is laminated in this order, and the glass We obtained an antenna system in which an antenna circuit board with a protective glass plate was arranged in part.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 20 ⁇ Manufacturing of antenna system> Glass (first glass layer) / polyvinyl acetal resin film (low dielectric layer) / circuit (circuit layer) / antenna circuit board in the same manner as in Example 18 except that the heating in the hot air dryer was changed to 30 ° C.
- the inner layer multilayer substrate with a thermoplastic liquid crystal polymer film as an insulating layer
- copper foil conductor layer
- polyvinyl acetal resin film low dielectric layer
- thin glass protecting layer
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 21 ⁇ Manufacturing of antenna circuit board> Thermoplastic liquid crystal polymer film (manufactured by Kuraray Co., Ltd., Vexter (registered trademark), thickness 50 ⁇ m, dielectric constant in the X direction: 3.4, dielectric constant in the Y direction: 3.4, dielectric loss tangent in the X direction: 0.002, Y Copper foil (manufactured by Fukuda Metal Foil Powder Industry Co., Ltd., electrolytic copper foil "H9A", thickness 12 ⁇ m) is superposed on both sides of the dielectric loss tangent: 0.002), and the heating plate is heated to 290 ° C. using a vacuum heat press device.
- Thermoplastic liquid crystal polymer film manufactured by Kuraray Co., Ltd., Vexter (registered trademark)
- Y Copper foil manufactured by Fukuda Metal Foil Powder Industry Co., Ltd., electrolytic copper foil "H9A", thickness 12 ⁇ m
- Polyvinyl acetal film 3 cm long and 3 cm wide on 01 glass manufactured by Kuraray Co., Ltd., V200KE, thickness 700 ⁇ m, permittivity in the X direction: 2.7, permittivity in the Y direction: 2.7, X direction Dissipation factor: 0.02, dielectric loss tangent in the Y direction: 0.02), the upper end of the film is 2 cm below (inward) from the upper end in the vertical direction of the glass, and the central part in the horizontal direction of the film is in the horizontal direction of the glass.
- the antenna circuit board produced above was placed on the central portion of the above so that the surface having the circuit was in contact with the polyvinyl acetal film.
- the glass was placed in a vacuum bag while maintaining the position of the antenna circuit board, treated under reduced pressure at 100 ° C. for 30 minutes, cooled, and then the reduced pressure was released to prelaminate the antenna circuit board against the glass. Then, this is put into an autoclave and treated at 140 ° C. and 1.2 MPa for 30 minutes, and then glass (first glass layer) / polyvinyl acetal film (low dielectric layer) / circuit (circuit layer) / antenna circuit board inner layer ( An antenna system was obtained in which an antenna circuit board was arranged in a part of glass in the order of (multilayer substrate having a thermoplastic liquid crystal polymer film as an insulating layer) / copper foil (conductor layer).
- the polyvinyl acetal film When a high frequency of wavelength ⁇ is incident on the obtained antenna system from the glass side, the polyvinyl acetal film is smaller than the glass and has a dielectric constant in the range satisfying the above formula (I). It can pass through the polyvinyl acetal layer, which is a low-dielectric layer, and reach the antenna circuit board. Further, since the thickness of the low-dielectric layer satisfies the range of ⁇ / 4 ⁇ n ⁇ 0.050 mm, high frequencies can be efficiently reached to the antenna circuit board.
- Example 22 instead of the low dielectric layer used in Example 21, a polyvinyl acetal film [MFR (190 ° C, 2.16 kg) 0.75 g / 10 min, thickness 50 ⁇ m, dielectric constant in the X direction: 2.5, Y
- MFR polyvinyl acetal film
- the antenna system is also manufactured in the same manner as in Example 21 except that a plurality of pieces of dielectric constant in the direction: 2.5, dielectric loss tangent in the X direction: 0.01, and dielectric loss tangent in the Y direction: 0.01 are used in layers.
- the low dielectric layer has a dielectric constant smaller than that of glass, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 23 instead of the low dielectric layer used in Example 21, an ionomer film (manufactured by Kuraray Co., Ltd., SGR5000, thickness 1000 ⁇ m, dielectric constant in the X direction: 2.2, dielectric constant in the Y direction: 2.2, X direction
- the low dielectric constant has a dielectric constant smaller than that of glass. Therefore, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 24 instead of the thermoplastic liquid crystal polymer film of the antenna circuit board used in Example 21, a polyimide film (manufactured by Toray DuPont Co., Ltd., Capton 300H, thickness 75 ⁇ m, dielectric constant in the X direction: 3.3, in the Y direction) Using a dielectric constant of 3.3, a dielectric tangent in the X direction: 0.007, and a dielectric tangent in the Y direction: 0.007), the adhesion inside the antenna circuit board is performed by SAFY (dielectric) manufactured by Nikkan Kogyo Co., Ltd., which is a low dielectric adhesive.
- SAFY dielectric
- the low dielectric layer has a dielectric constant smaller than that of glass, as in Example 21.
- the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- Example 25 instead of the polyimide film used in Example 24, a polyimide film (manufactured by Kaneka Co., Ltd., Apical NPI, thickness 50 ⁇ m, dielectric constant in the X direction: 3.4, dielectric constant in the Y direction: 3.4, X direction
- the low dielectric constant has a smaller dielectric constant than that of glass, as in the case of Example 21. Therefore, the high frequency incident on the glass can pass through the low dielectric layer and reach the antenna circuit board.
- the antenna system of the present invention suppresses the attenuation of high frequencies, enhances the transmission characteristics of the antenna circuit board against high frequencies, and can exchange a large amount of information. Therefore, for example, so-called connected such as automatic operation and constant communication by an in-vehicle device.
- Small cell base by installing on antenna systems for vehicles such as cars, windows and walls of buildings, various civil engineering structures (railway facilities, road facilities, energy facilities, dams / river facilities, water and sewage facilities, airport facilities), etc. It can be usefully used as a station antenna system or the like.
- the antenna system of the present invention can be used by constructing a window glass of a vehicle or a building, or by adhering to a vehicle or a building.
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Abstract
Description
本発明の別の目的は、ガラス層を介して通信するに当たり、GHz帯域における伝送特性に優れるアンテナ回路基板を提供することにある。
本発明の別の目的は、ガラス層を介して通信するに当たり、GHz帯域における伝送特性に優れるアンテナ回路基板と低誘電層との積層体を提供することにある。
そして、高周波が透過するガラスに対してガラスよりも誘電率が低い低誘電層を隣接させ、前記低誘電層を介して電波をアンテナ回路基板に到達させると、高周波を精度よく利用することが可能であることを見出し、本発明の完成に至った。
〔態様1〕
高周波を透過させる第1のガラス層と、
前記第1のガラス層より低い誘電率を有するとともに、前記第1のガラス層に隣接し、前記第1のガラス層から入射した高周波を透過させる低誘電層と、
前記低誘電層に隣接し、前記低誘電層から入射した高周波を受信する高周波絶縁層を含むアンテナ回路基板と、
で構成された、1GHz以上(好ましくは2GHz以上、より好ましくは6GHz以上、さらに好ましくは30GHz以上、特に好ましくは50GHz以上)の周波数で使用するためのアンテナシステム。
〔態様2〕
態様1に記載のアンテナシステムであって、高周波絶縁層が、熱可塑性液晶ポリマーまたはポリイミドで構成される、アンテナシステム。
〔態様3〕
態様1または2に記載のアンテナシステムであって、周波数28GHzにおいて測定される、平面における一方向およびそれに直行する方向の双方の誘電率として、前記第1のガラス層の誘電率εgが5.5~7.5(好ましくは5.8~7.3、より好ましくは6.0~7.0)であり、前記低誘電層の誘電率εfが2.0~4.0(好ましくは2.2~3.5、より好ましくは2.4~3.0)である、アンテナシステム。
〔態様4〕
態様1~3のいずれか一態様に記載のアンテナシステムであって、周波数28GHzにおいて測定される、平面における一方向およびそれに直行する方向の双方の、誘電正接として、前記第1のガラス層の誘電正接tanδgが0.05以下(好ましくは0.03以下、より好ましくは0.02以下)であり、前記低誘電層の誘電正接tanδfが0.05以下(好ましくは0.03以下、より好ましくは0.01以下)である、アンテナシステム。
〔態様5〕
態様1~4のいずれか一態様に記載のアンテナシステムであって、前記低誘電層がポリビニルアセタール樹脂、オレフィン-カルボン酸ビニル共重合体樹脂、アイオノマー樹脂、およびアクリル系樹脂からなる群から選択される少なくとも一種で構成される、アンテナシステム。
〔態様6〕
態様1~5のいずれか一態様に記載のアンテナシステムであって、周波数28GHzにおいて測定される、平面における一方向およびそれに直行する方向の双方の誘電率として、前記高周波絶縁層の誘電率εpが2.0~4.0(好ましくは2.2~3.5、より好ましくは2.4~3.0)である、アンテナシステム。
〔態様7〕
態様1~6のいずれか一態様に記載のアンテナシステムであって、周波数28GHzにおいて測定される、平面における一方向およびそれに直行する方向の双方の誘電正接として、前記高周波絶縁層の誘電正接tanδpが0.010以下(好ましくは0.005以下、より好ましくは0.003以下)である、アンテナシステム。
〔態様8〕
態様1~7のいずれか一態様に記載のアンテナシステムであって、前記低誘電層の誘電率εfと、前記高周波絶縁層の誘電率εpとが、εf/εp=30/70~60/40(好ましくは35/65~60/40、より好ましくは38/62~55/45)である、
アンテナシステム。
〔態様9〕
態様1~8のいずれか一態様に記載のアンテナシステムであって、前記低誘電層の厚さがλ/4×n±0.050mm(ここで、λは高周波の波長であり、nは整数)(好ましくはλ/4×n±0.030mm、より好ましくはλ/4×n±0.025mm)である、アンテナシステム。
〔態様10〕
態様1~9のいずれか一態様に記載のアンテナシステムであって、前記第1のガラス層が、ソーダ石灰ガラス、ホウ酸ガラス、ホウ珪酸ガラス、アルミノ珪酸ガラス、石英ガラス、無アルカリガラス、および低アルカリガラスから選ばれる少なくとも1種で構成される、アンテナシステム。
〔態様11〕
態様1~10のいずれか一態様に記載のアンテナシステムであって、さらに第2のガラス層を含み、前記第1のガラス層と前記第2のガラス層との間に、低誘電層およびアンテナ回路基板が配設される、アンテナシステム。
〔態様12〕
態様1~11のいずれか一態様に記載のアンテナシステムであって、乗り物または建物の窓ガラスを構成する、アンテナシステム。
〔態様13〕
態様1~11のいずれか一態様に記載のアンテナシステムであって、乗り物、建物または土木構造物に対して付着した状態で電波を受信するための、アンテナシステム。
〔態様14〕
態様1~13のいずれか一態様に記載のアンテナシステムに用いられるための、アンテナ回路基板。
〔態様15〕
態様1~14のいずれか一態様に記載のアンテナシステムに用いられるための、アンテナ回路基板と、当該アンテナ回路基板に隣接する低誘電層との積層体。
図1は、第1の実施形態によるアンテナシステムの製造方法を説明するための概略断面図である。図1に示すように、第1の実施形態に係るアンテナシステム100は、第1のガラス層101と、第1のガラス層101より低い誘電率を有する低誘電層103と、アンテナ回路基板107とを備えている。第1のガラス層101と低誘電層103とは厚み方向において隣接している部分を有し、かつ低誘電層103とアンテナ回路基板107とは厚み方向において隣接している部分を有している。
ここで、低誘電層103の厚さdfは、回路部分(回路層104)の面内に占める割合が半分未満である場合は、回路部分を無視した第1のガラス層101と絶縁層105との間の距離として把握されるが、便宜上、低誘電層103の厚さdfと称している。
なお、アンテナ回路基板107上の厚さdfとは、アンテナ回路基板に対して、高周波Aの入射側に配設された低誘電層の厚さであってもよい。
図2は、第2の実施形態によるアンテナシステムの製造方法を説明するための概略断面図である。図2に示すように、第2の実施形態に係るアンテナシステム200は、第1のガラス層201と、第1のガラス層201より低い誘電率を有する低誘電層203と、アンテナ回路基板107と、第1のガラス層201と厚さ方向Zにおいて相対して配設される第2のガラス層202とを備えている。なお、第1の実施形態と同じ構成要素には同じ符号を付して、その説明を省略する。アンテナシステム200は、例えば、第1のガラス層201および第2のガラス層202により複層ガラス(または合わせガラス)が形成され、複層ガラスからなる窓ガラスや乗り物用ガラス(フロントガラス、サイドガラス、リアガラス)などであってもよく、第1のガラス層201および第2のガラス層202の内部に低誘電層103を介してアンテナ回路基板107が配設されている状態であってもよい。
図3は、第3の実施形態によるアンテナシステムの製造方法を説明するための概略断面図である。図3に示すように、第3の実施形態に係るアンテナシステム300は、第1のガラス層301と、第1のガラス層301より低い誘電率を有する低誘電層303と、アンテナ回路基板107と、第2のガラス層302とを備えている。なお、第1の実施形態と同じ構成要素には同じ符号を付して、その説明を省略する。
第1のガラス層301と低誘電層303とは厚み方向において隣接している部分を有し、かつ低誘電層303とアンテナ回路基板107とは厚み方向において隣接している部分を有している。さらに、アンテナ回路基板107は、各種固着手段により第2のガラス層302に対して付着させればよく、例えば、接着層308を介して第2のガラス層302にアンテナ回路基板107を付着してもよい。
図4は、第4の実施形態によるアンテナシステムの製造方法を説明するための概略断面図である。図4に示すように、第4の実施形態に係るアンテナシステム400は、第1のガラス層401と、第1のガラス層401より低い誘電率を有する低誘電層403と、アンテナ回路基板107とを備えている。なお、第1の実施形態と同じ構成要素には同じ符号を付して、その説明を省略する。
図5は、第5の実施形態によるアンテナシステムを説明するための概略断面図である。図5に示すように、第5の実施形態に係るアンテナシステム500は、第1のガラス層501と、第1のガラス層501より低い誘電率を有する第1の低誘電層503aと、アンテナ回路基板107と、第2の低誘電層503bと、第1のガラス層501と厚さ方向Zにおいて相対して配設される第2のガラス層502とを備えている。なお、第5の実施形態と同じ構成要素には同じ符号を付して、その説明を省略する。アンテナシステム500は、例えば、第1のガラス層501および第2のガラス層502により合わせガラスが形成され、合わせガラスからなる窓ガラスなどであってもよく、第1のガラス層501および第2のガラス層502の内部に第1の低誘電層503aおよび第2の低誘電層503bを介してアンテナ回路基板107が配設されている状態であってもよい。
また、第1および第2の低誘電層は一体化しており、低誘電層の全体の厚さは、厚さdaとして、第1のガラス層501と第2のガラス層502との間の距離として把握される。
図6は、第6の実施形態によるアンテナシステムを説明するための概略断面図である。図6に示すように、第6の実施形態に係るアンテナシステム600は、第1のガラス層601と、第1のガラス層601より低い誘電率を有する第1の低誘電層603aと、アンテナ回路基板107と、第2の低誘電層603bと、第1のガラス層601と厚さ方向Zにおいて相対して配設される第2のガラス層602とを備えている。なお、第5の実施形態と同じ構成要素には同じ符号を付して、その説明を省略する。アンテナシステム600は、例えば、第1のガラス層601および第2のガラス層602により合わせガラスが形成され、合わせガラスからなる窓ガラスなどであってもよく、第1のガラス層601および第2のガラス層602の内部に第1の低誘電層603aおよび第2の低誘電層603bを介してアンテナ回路基板107が配設されている状態であってもよい。
ここで、第1の低誘電層603aのアンテナ回路基板107上の厚さdfは、回路部分(回路層104)の面内に占める割合が半分未満であるため、第1のガラス層601と絶縁層105との間の距離として把握される。
本発明の積層体は、アンテナ回路基板と、当該アンテナ回路基板に隣接する低誘電層とを含んでいればよい。例えば、積層体としては、第1の低誘電層とアンテナ回路基板とをこの順で積層する積層体、第1の低誘電層とアンテナ回路基板と第2の低誘電層とをこの順で積層する積層体などが挙げられる。前記積層体は、これらの積層体に対して、さらに保護層などの第3の層を形成していてもよい。
前記積層体は、ガラスなどの被着体と組み合わされて、アンテナシステムを形成してもよい。例えば、このような積層体は、上述した第1~第6の実施形態に記載するアンテナシステムの一部を構成していてもよい。
第1および第2のガラス層としては、高周波を透過させた後に低誘電層を介してアンテナ回路基板へ高周波を到達させることができる限り、その形状は特に限定されないが、例えば、平面状、曲面状などの面状ガラスが挙げられる。
低誘電層は、第1のガラス層より低い誘電率を有しており、第1のガラス層から入射した高周波をアンテナ回路基板へ到達させる役割を有している。低誘電層は、同一の周波数において比較した場合、第1のガラス層より小さい誘電率を有している。
好ましくは、低誘電層の誘電率εfは、第1のガラス層の誘電率εgに対して、下記式(I)の範囲で存在するのが好ましい。
なお、融着または接着(以下、融着等と称する)に際しては、空気が混和するのを予防する観点から脱気下および/または減圧下で行われるのが好ましい。脱気は接合界面から物理的に空気を押出すことにより行われてもよい。
融着等は、予備的に融着等を行うことによりアンテナ回路基板の位置決めをした後、脱気下および/または減圧下でアンテナ回路基板と第1のガラスとを融着等させてもよい。
ポリビニルアセタール樹脂としては、例えばポリビニルアルコール又はビニルアルコール共重合体等のビニルアルコール系樹脂のアセタール化によって製造されるポリビニルアセタール樹脂が挙げられる。
低誘電層がポリビニルアセタール樹脂を含有する場合、1種類のポリビニルアセタール樹脂を含んでいてもよいし、粘度平均重合度、アセタール化度、アセチル基量、水酸基量、エチレン含有量、アセタール化に用いられるアルデヒドの分子量、及び鎖長のうちいずれか1つ以上がそれぞれ異なる2つ以上のポリビニルアセタール樹脂を含んでいてもよい。ポリビニルアセタール樹脂が異なる2つ以上のポリビニルアセタール樹脂を含む場合は、粘度平均重合度、アセタール化度、アセチル基量、水酸基量のうちいずれか1つ以上がそれぞれ異なる2つ以上のポリビニルアセタール樹脂の混合物であることが、溶融成形の容易性の観点等から好ましい。
また、ポリビニルアルコールの粘度平均重合度は5000以下が好ましく、3000以下がより好ましく、2500以下がさらに好ましく、2300以下が特に好ましく、2000以下が最も好ましい。
ポリビニルアルコールの粘度平均重合度は、例えばJIS K 6726「ポリビニルアルコール試験方法」に基づいて測定できる。
・多価の脂肪族又は芳香族酸のエステル。例えば、ジアルキルアジペート(例えば、ジヘキシルアジペート、ジ-2-エチルブチルアジペート、ジオクチルアジペート、ジ-2-エチルヘキシルアジペート、ヘキシルシクロヘキシルアジペート、ヘプチルアジペートとノニルアジペートとの混合物、ジイソノニルアジペート、ヘプチルノニルアジペート);アジピン酸と脂環式エステルアルコール若しくはエーテル化合物を含むアルコールとのエステル(例えば、ジ(ブトキシエチル)アジペート、ジ(ブトキシエトキシエチル)アジペート);ジアルキルセバケート(例えば、ジブチルセバケート);セバシン酸と脂環式若しくはエーテル化合物を含むアルコールとのエステル;フタル酸のエステル(例えば、ブチルベンジルフタレート、ビス-2-ブトキシエチルフタレート);及び脂環式多価カルボン酸と脂肪族アルコールとのエステル(例えば、1,2-シクロヘキサンジカルボン酸ジイソノニルエステル)が挙げられる。
・多価の脂肪族若しくは芳香族アルコール又は1つ以上の脂肪族若しくは芳香族置換基を有するオリゴエーテルグリコールのエステル又はエーテル。例えば、グリセリン、ジグリコール、トリグリコール、テトラグリコール等と、線状若しくは分岐状の脂肪族若しくは脂環式カルボン酸とのエステルが挙げられる。具体的には、ジエチレングリコール-ビス-(2-エチルヘキサノエート)、トリエチレングリコール-ビス-(2-エチルヘキサノエート)、トリエチレングリコール-ビス-(2-エチルブタノエート)、テトラエチレングリコール-ビス-n-ヘプタノエート、トリエチレングリコール-ビス-n-ヘプタノエート、トリエチレングリコール-ビス-n-ヘキサノエート、テトラエチレングリコールジメチルエーテル、及びジプロピレングリコールベンゾエートが挙げられる。
・脂肪族又は芳香族のエステルアルコールのリン酸エステル。例えば、トリス(2-エチルヘキシル)ホスフェート(TOF)、トリエチルホスフェート、ジフェニル-2-エチルヘキシルホスフェート、及びトリクレジルホスフェートが挙げられる。
・クエン酸、コハク酸及び/又はフマル酸のエステル。
好ましいポリビニルアセタール樹脂は、例えば、株式会社クラレから「モビタール(商標)」などとして上市され、ポリビニルアセタール樹脂製フィルムは、例えば、株式会社クラレから「トロシフォル(商標)」などとして上市されている。
オレフィン-カルボン酸ビニル共重合体樹脂は、第1のガラス層より低い誘電率を有する限り特に限定されず、オレフィンとしては、例えばエチレン、プロピレン、n-ブテン、イソブチレン、ブタジエン、イソプレンなどが挙げられ、カルボン酸ビニルとしては、ポリビニルアセタール樹脂の項で例示したビニルエステル化合物が挙げられる。これらの中でもオレフィンとしてエチレンを使用し、カルボン酸ビニル化合物として酢酸ビニルを使用した、エチレン-酢酸ビニル共重合体樹脂が、誘電率を制御できるとともに接着性が良好であるためから好ましい。
好ましいオレフィン-カルボン酸ビニル共重合体樹脂は、例えば、エチレン酢酸ビニルとして、東ソー株式会社から「メルセン(商標)」などとして上市されている。
アイオノマー樹脂としては特に限定されないが、エチレンなどのオレフィン由来の構成単位、及びα,β-不飽和カルボン酸に由来の構成単位を有し、α,β-不飽和カルボン酸の少なくとも一部が金属イオンによって中和された熱可塑性樹脂が挙げられる。金属イオンとしては、例えばナトリウムイオン等のアルカリ金属イオン;マグネシウムイオン等のアルカリ土類金属イオン;亜鉛イオン等が挙げられる。
好ましいアイオノマー樹脂製のフィルムは、例えば、株式会社クラレから「セントリグラス(商標)」などとして上市されている。
アクリル系樹脂は、アクリル酸エステル系単量体および/またはメタクリル酸エステル系単量体から得られる重合体が好ましく、該単量体としては、メチルアクリレート、エチルアクリレート、n-プロピルアクリレート等のアルキルアクリレート;グリシジルアクリレート、2-ヒドロキシエチルアクリレート等の変性アクリレート;エチレングリコールジアクリレート、ポリエチレングリコールジアクリレート、ポリプロピレングリコールジアクリレート、ネオペンチルグリコールジアクリレート、ペンタエリトリトットトリアクリレート等の多官能アクリレート;メチルメタクリレート、エチルメタクリレート、n-プロピルメタクリレート等のアルキルメタクリレート;グリシジルメタクリレート、2-ヒドロキシエチルメタクリレート等の変性メタクリレート;エチレングリコールジメタクリレート、ポリエチレングリコールジメタクリレート、ポリプロピレングリコールジメタクリレート、ネオペンチルグリコールジメタクリレート、ペンタエリトリトットトリメタクリレート等の多官能メタクリレートなどが挙げられる。これらの単量体は単独又は2種以上を組み合わせて用いることができる。
アンテナ回路基板は、少なくとも1つの回路層と、少なくとも1つの高周波絶縁層とを含んでおり、その形態は特に限定されず、公知または慣用の手段により、各種高周波回路基板として用いることが可能である。
アンテナ回路基板は、高周波絶縁層を備えている。高周波絶縁層とは、高周波回路における電気信号の伝送損失を低減することができる絶縁層である限り特に限定されないが、例えば、熱可塑性液晶ポリマー(LCP)、ポリイミド(PI)(特に変性ポリイミド(MPI))、ポリエチレンナフタレート(PEN)、ポリエーテルエーテルケトン(PEEK)などの耐熱性樹脂で構成される絶縁層が挙げられる。中でも、ポリイミドで構成される絶縁層は、耐熱性に優れるとともに耐薬品性にも優れているので好適に採用される。また、誘電特性が優れている点では、熱可塑性液晶ポリマーが好適に採用される。
また、低誘電層の誘電率εfと、高周波絶縁層の誘電率εpとは、εf/εp=30/70~60/40であってもよく、好ましくは35/65~60/40、より好ましくは38/62~55/45であってもよい。
以下の低誘電層および高周波絶縁層で用いたフィルムについて、キーコム株式会社製 Model No.DPS03(ファブリペロー共振器)を用いて28GHz(25℃)の周波数でJIS R 1660-2に準拠して誘電率および誘電正接の測定を行った。なお、測定は平面における一方向およびそれに直行する方向の双方(X-Y方向)において実施した。
アンテナ回路基板の厚さは、アンテナ回路基板をマイクロメーター(ミツトヨ(株)製、型式227-201-CLM-15QM)を使用して測定した。また、低誘電層の厚さは、低誘電層として用いられるフィルムを用いて測定した。なお、アンテナシステム全体、ならびにアンテナシステム中のアンテナ回路基板およびガラスの厚みをそれぞれ測定し、アンテナシステム全体の厚みからアンテナ回路基板およびガラスの厚みを除することにより、低誘電層の厚さを得てもよい。
ポリビニルアセタール樹脂フィルムを構成するポリビニルアセタール樹脂をトルエン/エタノール=1/1(質量比)の混合溶媒に濃度10質量%となるように溶解して、溶液を調製した。この溶液の粘度を、ブルックフィールド型(B型)粘度計を用いて、20℃、回転数30rpmで測定した。
<アンテナ回路基板の作製>
熱可塑性液晶ポリマーフィルム(株式会社クラレ製、ベクスター(登録商標)、厚さ50μm、X方向の誘電率:3.4、Y方向の誘電率:3.4、X方向の誘電正接:0.002、Y方向の誘電正接:0.002)の両面に銅箔(福田金属箔粉工業株式会社製、電解銅箔「H9A」、厚さ12μm)を重ね合わせ、真空熱プレス装置を用いて、加熱盤を290℃に設定し、4MPaの圧力下、15分間、圧着して、銅箔/熱可塑性液晶ポリマーフィルム/銅箔の構成の銅張積層板を作製した。得られた銅張積層板の一方の面の銅箔の一部をエッチング液により除去することで、回路を形成し、この操作を繰り返すことにより厚さ400μmのアンテナ回路基板(縦5cm、横5cm)を作製した。
ポリビニルブチラール樹脂1(水酸基量19.8質量%、アセタール化度70.8モル%、アセチル基量1.0質量%、樹脂粘度152mPa・s)およびポリビニルブチラール樹脂2(水酸基量20.1質量%、アセタール化度70.4モル%、アセチル基量0.9質量%、樹脂粘度1410mPa・s)を、75:25の質量比でブレンドし、溶融混練してストランド状に押出し、ペレット化した。得られたペレットを単軸押出機とTダイを用いて溶融押出し、金属弾性ロールを用いて表面が平滑な厚さ50μmのポリビニルアセタール樹脂フィルム(X方向の誘電率:2.5、Y方向の誘電率:2.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01、可塑剤含有量:0質量%、樹脂粘度:245mPa・s)を得た。
縦20cm、横10cm、厚さ3mmの下側ガラス上に、片面エンボス付きのテフロン(登録商標)シート、上記で作製した乾燥した縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルム、上記で作製したアンテナ回路基板(縦5cm、横5cm)、片面エンボス付きのテフロン(登録商標)シート、および縦5cm、横5cm、厚さ3mmの上側ガラスをこの順番に重ねて固定した。なお、ポリビニルアセタール樹脂フィルムとアンテナ回路基板と上側ガラスとは、互いに重なるように位置合わせを行った。
ポリビニルアセタール樹脂フィルムに隣接するテフロン(登録商標)シートは、エンボス面がポリビニルアセタール樹脂フィルムに接するように配置した。アンテナ回路基板に隣接するテフロン(登録商標)シートは、鏡面がアンテナ回路基板に接するように配置した。アンテナ回路基板は、回路を有する面がポリビニルアセタール樹脂フィルムに接するように配置した。
これらを真空ラミネータ装置で真空下、140℃で15分間加熱後、上チャンバーを-10kPa(下チャンバーとの差圧約90kPa)にして15分間保持した後、常圧にもどして、上下に配設したテフロン(登録商標)シートと上側および下側ガラスを取り外して、ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)の順で積層された積層体を作製した。
縦20cm、横10cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01の下側ガラス上に、上記積層体(縦5cm、横5cm)を、ポリビニルアセタール樹脂フィルム(低誘電層)が下側ガラスに接するように重ね、その上にテフロン(登録商標)シート、および縦5cm、横5cm、厚さ3mmの上側ガラスをこの順に重ねて固定した。なお、アンテナ回路基板は、下側ガラスの縦方向端部から内方に2cm以上7cm以下の領域に配設された。また、積層体と上側ガラスとは、互いに重なるように位置合わせを行った。
これらを真空ラミネータ装置で真空下、140℃で15分間加熱後、上チャンバーを-10kPa(下チャンバーとの差圧約90kPa)にして15分間保持した後、常圧にもどして、テフロン(登録商標)シートと上側ガラスを取り外して、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)の順で積層され、ガラスの一部にアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
縦20cm、横10cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01の下側ガラス上に、実施例1で得られた積層体(縦5cm、横5cm)を、ポリビニルアセタール樹脂フィルム(低誘電層)が下側ガラスに接するように重ね、その上に実施例1で作製した乾燥した縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルム、および縦5cm、横5cm、厚さ1mmの薄板ガラスをこの順に重ねて固定した。なお、アンテナ回路基板は、下側ガラスの縦方向端部から内方に2cm以上7cm以下の領域に配設された。また、積層体と薄板ガラスとは、互いに重なるように位置合わせを行った。
これらを真空ラミネータ装置で真空下、140℃で15分間加熱後、上チャンバーを-10kPa(下チャンバーとの差圧約90kPa)にして15分間保持した後、常圧にもどして、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<積層体の作製>
縦20cm、横10cm、厚さ3mmのガラス上に、片面エンボス付きのテフロン(登録商標)シート、実施例1で作製した乾燥した縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルム、実施例1で作製したアンテナ回路基板(縦5cm、横5cm)、実施例1で作製した乾燥した縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルム、および縦5cm、横5cm、厚さ1mmの薄板ガラスをこの順に重ねて固定した。なお、ポリビニルアセタール樹脂フィルムとアンテナ回路基板と薄板ガラスとは、互いに重なるように位置合わせを行った。
テフロン(登録商標)シートは、エンボス面がポリビニルアセタール樹脂フィルムに接するように配置した。アンテナ回路基板は、回路を有する面が、テフロン(登録商標)シートに隣接するポリビニルアセタール樹脂フィルムに接するように配置した。
これらを真空ラミネータ装置で真空下、140℃で15分間加熱後、上チャンバーを-10kPa(下チャンバーとの差圧約90kPa)にして15分間保持した後、常圧にもどして、テフロン(登録商標)シートとガラスを取り外して、ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層された積層体を作製した。
縦20cm、横10cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01のガラス上に、上記積層体(縦5cm、横5cm)を、ポリビニルアセタール樹脂フィルム(低誘電層)がガラスに接するように重ねて固定した。なお、積層体は、ガラスにおいて、ガラスの縦方向端部から内方に2cm以上7cm以下の領域に配設された。
これらを真空ラミネータ装置で真空下、140℃で15分間加熱後、上チャンバーを-10kPa(下チャンバーとの差圧約90kPa)にして15分間保持した後、常圧にもどして、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<積層体の作製>
縦20cm、横10cm、厚さ3mmの下側ガラス上に、片面エンボス付きのテフロン(登録商標)シート、実施例1で作製した乾燥した縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルム、実施例1で作製したアンテナ回路基板(縦5cm、横5cm)、実施例1で作製した乾燥した縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルム、片面エンボス付きのテフロン(登録商標)シート、および縦5cm、横5cm、厚さ3mmの上側ガラスをこの順に重ねて固定した。テフロン(登録商標)シートは、エンボス面がポリビニルアセタール樹脂フィルムに接するように配置した。アンテナ回路基板は、回路を有する面が、下側ガラス側のポリビニルアセタール樹脂フィルムに接するように配置した。
これらを真空ラミネータ装置で真空下、140℃で15分間加熱後、上チャンバーを-10kPa(下チャンバーとの差圧約90kPa)にして15分間保持した後、常圧にもどして、上下に配設したテフロン(登録商標)シートと上側および下側ガラスを取り外して、ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)の順で積層された積層体を作製した。
縦20cm、横10cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01のガラス上に、上記積層体(縦5cm、横5cm)を、回路層に隣接したポリビニルアセタール樹脂フィルム(低誘電層)がガラスに接するように重ね、その上に縦5cm、横5cm、厚さ1mmの薄板ガラスを重ねて固定した。なお、アンテナ回路基板は、ガラスの縦方向端部から内方に2cm以上7cm以下の領域に配設された。また、積層体と薄板ガラスとは、互いに重なるように位置合わせを行った。
これらを真空ラミネータ装置で真空下、140℃で15分間加熱後、上チャンバーを-10kPa(下チャンバーとの差圧約90kPa)にして15分間保持した後、常圧にもどして、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<積層体の作製>
縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルムに代えて、ポリビニルブチラール樹脂(水酸基量28.8質量%、粘度平均重合度1700)72質量%とトリエチレングリコール-ビス-(2-エチルヘキサノエート)28質量%とを含む、縦5cm、横5cm、厚さ0.38mmの可塑化ポリビニルアセタール樹脂フィルム(X方向の誘電率:2.7、Y方向の誘電率:2.7、X方向の誘電正接:0.02、Y方向の誘電正接:0.02)を用いた以外は実施例1と同様にして、可塑化ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)の順で積層された積層体を作製した。
実施例1の積層体に代えて上記積層体を用いた以外は実施例1と同様にして、ガラス(第1のガラス層)/可塑化ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)の順で積層され、ガラスの一部にアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
実施例1の積層体に代えて実施例5の積層体を用い、縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルムに代えて、実施例5で使用した縦5cm、横5cm、厚さ0.38mmの可塑化ポリビニルアセタール樹脂フィルムを用いた以外は実施例2と同様にして、ガラス(第1のガラス層)/可塑化ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/可塑化ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<積層体の作製>
縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルムに代えて縦5cm、横5cm、厚さ50μmのアイオノマー樹脂フィルム(株式会社クラレ製、SentryGlas(登録商標) SG5000を熱プレスにより薄膜化したフィルム、X方向の誘電率:2.2、Y方向の誘電率:2.2、X方向の誘電正接:0.002、Y方向の誘電正接:0.002)を用いた以外は実施例1と同様にして、アイオノマー樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)の順で積層された積層体を作製した。
実施例1の積層体に代えて上記積層体を用い、縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルムに代えて縦5cm、横5cm、厚さ50μmのアイオノマー樹脂フィルム(株式会社クラレ製、SentryGlas(登録商標) SG5000を熱プレスにより薄膜化したフィルム)を用いた以外は実施例2と同様にして、ガラス(第1のガラス層)/アイオノマー樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/アイオノマー樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<積層体の作製>
縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルムに代えて、縦5cm、横5cm、厚さ30μmのポリビニルアセタール樹脂フィルムを用いる以外は実施例1と同様にして、ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)の順で積層された積層体を作製する。
実施例1の積層体に代えて上記積層体を用いる以外は実施例2と同様にして、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得る。厚さ30μmのポリビニルアセタール樹脂フィルムは実施例1で作製したポリビニルアセタール樹脂フィルムと同様のポリビニルアセタール樹脂で構成されるため、同様の誘電率を有していると推測される。得られるアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができると推測される。
<アンテナシステムの作製>
縦20cm、横10cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01の下側ガラス上に、実施例1で作製した乾燥した縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルム、実施例1で作製したアンテナ回路基板(縦5cm、横5cm)、テフロン(登録商標)シート、および縦5cm、横5cm、厚さ3mmの上側ガラスをこの順に重ねて固定した。アンテナ回路基板は、回路を有する面が、ポリビニルアセタール樹脂フィルムに接するように配置した。なお、ポリビニルアセタール樹脂フィルムとアンテナ回路基板と上側ガラスとは、互いに重なるように位置合わせを行った。
これらを真空ラミネータ装置で真空下、140℃で15分間加熱後、上チャンバーを-10kPa(下チャンバーとの差圧約90kPa)にして15分間保持した後、常圧にもどして、テフロン(登録商標)シートと上側ガラスを取り外して、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)の順で積層され、ガラスの一部にアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
縦20cm、横10cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01の下側ガラス上に、実施例1で作製した乾燥した縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルム、実施例1で作製したアンテナ回路基板(縦5cm、横5cm)、実施例1で作製した乾燥した縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルム、および縦5cm、横5cm、厚さ1mmの薄板ガラスをこの順に重ねて固定した。アンテナ回路基板は、回路を有する面が、下側ガラス側のポリビニルアセタール樹脂フィルムに接するように配置した。なお、アンテナ回路基板は、下側ガラスの縦方向端部から内方に2cm以上7cm以下の領域に配設された。また、アンテナ回路基板と2枚のポリビニルアセタール樹脂フィルムと薄板ガラスとは、互いに重なるように位置合わせを行った。
これらを真空バッグに入れて、常温で減圧して15分後、減圧のまま135℃まで昇温して30分間保持し、その後降温して減圧を解除して、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
縦5cm、横5cm、厚さ50μmのポリビニルアセタール樹脂フィルムに代えて実施例5で使用した縦5cm、横5cm、厚さ0.38mmの可塑化ポリビニルアセタール樹脂フィルムを用いた以外は実施例9と同様にして、ガラス(第1のガラス層)/可塑化ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)の順で積層され、ガラスの一部にアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
縦20cm、横10cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01のガラス上に、実施例5で使用した乾燥した縦7cm、横7cm、厚さ0.38mmの可塑化ポリビニルアセタール樹脂フィルム、可塑化ポリビニルアセタール樹脂フィルムの中央に実施例1で作製したアンテナ回路基板(縦5cm、横5cm)、実施例1で作製した乾燥した縦7cm、横7cm、厚さ50μmのポリビニルアセタール樹脂フィルム、および縦7cm、横7cm、厚さ1mmの薄板ガラスをこの順に重ねて固定した。アンテナ回路基板は、回路を有する面が、可塑化ポリビニルアセタール樹脂フィルムに接するように配置した。なお、アンテナ回路基板は、ガラスの縦方向端部から内方に2cm以上7cm以下の領域に配設された。また、2枚のポリビニルアセタール樹脂フィルムと薄板ガラスとは、互いに重なるように位置合わせを行った。
これらを真空バッグに入れて、常温で減圧して15分後、減圧のまま100℃まで昇温して30分間保持し、その後降温して減圧を解除して仮圧着した後、オートクレーブに投入し、140℃、12MPaで30分間処理して、ガラス(第1のガラス層)/可塑化ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムには、部分的な剥がれや発泡は見られず、回路の断線や変形等も見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
縦30cm、横30cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01の下側ガラス上に、実施例1で得られた積層体を、ポリビニルアセタール樹脂フィルム(低誘電層)が下側ガラスに接するように重ね、その上に、ポリビニルブチラール樹脂(水酸基量28.8質量%、粘度平均重合度1700)72質量%とトリエチレングリコール-ビス-(2-エチルヘキサノエート)28質量%とを含む、縦30cm、横30cm、厚さ0.76mmの可塑化ポリビニルアセタール樹脂中間膜、および縦30cm、横30cm、厚さ3mmの上側ガラスをこの順に重ねて固定した。なお、アンテナ回路基板は、下側ガラスの面方向の中央に配設された。
これらを真空バッグに入れて、常温で減圧して15分後、減圧のまま100℃まで昇温して30分間保持し、その後降温して減圧を解除して仮圧着した後、オートクレーブに投入し、140℃、12MPaで30分間処理して、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(第1の低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/可塑化ポリビニルアセタール樹脂中間膜(第2の低誘電層)/ガラス(第2のガラス層)の順で積層され、合わせガラスの内部にアンテナ回路基板が封止されたアンテナシステムが得られた。得られたアンテナシステムには、アンテナ回路の周囲にも発泡や大きな光学むらは見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
縦30cm、横30cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01の下側ガラス上に、実施例1で作製した乾燥した縦7cm、横7cm、厚さ50μmのポリビニルアセタール樹脂フィルムを重ね、ポリビニルアセタール樹脂フィルムの中央に実施例1で作製したアンテナ回路基板(縦5cm、横5cm)を重ねて配置し、その上に実施例13で使用した縦30cm、横30cm、厚さ0.76mmの可塑化ポリビニルアセタール樹脂中間膜、および縦30cm、横30cm、厚さ3mmの上側ガラスをこの順に重ねて固定した。アンテナ回路基板は、回路を有する面が、ポリビニルアセタール樹脂フィルムに接するように配置した。なお、アンテナ回路基板は、下側ガラスの面方向の中央に配設された。
これらを真空バッグに入れて、常温で減圧して15分後、減圧のまま100℃まで昇温して30分間保持し、その後降温して減圧を解除して仮圧着した後、オートクレーブに投入し、140℃、12MPaで30分間処理して、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(第1の低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/可塑化ポリビニルアセタール樹脂中間膜(第2の低誘電層)/ガラス(第2のガラス層)の順で積層され、合わせガラスの内部にアンテナ回路基板が封止されたアンテナシステムが得られた。得られたアンテナシステムには、アンテナ回路の周囲にも発泡や大きな光学むらは見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
縦30cm、横30cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01の下側ガラス上に、縦7cm、横7cm、厚さ50μmのアイオノマー樹脂フィルム(株式会社クラレ製、SentryGlas(登録商標) SG5000を熱プレスにより薄膜化したフィルム、X方向の誘電率:2.2、Y方向の誘電率:2.2、X方向の誘電正接:0.002、Y方向の誘電正接:0.002)を重ね、ポリビニルアセタール樹脂フィルムの中央に実施例1で作製したアンテナ回路基板(縦5cm、横5cm)を重ねて配置し、その上に乾燥した縦30cm、横30cm、厚さ890μmのアイオノマー樹脂中間膜(株式会社クラレ製、SentryGlas(登録商標) SG5000)、および縦30cm、横30cm、厚さ3mmの上側ガラスをこの順に重ねて固定した。アンテナ回路基板は、回路を有する面が、アイオノマー樹脂フィルムに接するように配置した。なお、アンテナ回路基板は、下側ガラスの面方向の中央に配設された。
これらを真空バッグに入れて、常温で減圧して15分後、減圧のまま100℃まで昇温して30分間保持し、その後降温して減圧を解除して仮圧着した後、オートクレーブに投入し、135℃、12MPaで30分間処理して、ガラス(第1のガラス層)/アイオノマー樹脂フィルム(第1の低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/アイオノマー樹脂中間膜(第2の低誘電層)/ガラス(第2のガラス層)の順で積層され、合わせガラスの内部にアンテナ回路基板が封止されたアンテナシステムが得られた。得られたアンテナシステムには、アンテナ回路の周囲にも発泡や大きな光学むらは見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
実施例1で得られた積層体のポリビニルアセタール樹脂フィルム面にトリエチレングリコール-ジ-(2-エチルヘキサノエート)を適当量塗布し、縦20cm、横10cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01のガラス上に、空気が入らないように貼り合わせた。なお、アンテナ回路基板は、ガラスの縦方向端部から内方に2cm以上7cm以下の領域に配設された。
これらを50℃の熱風乾燥機で1時間加熱することにより、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)の順で積層され、ガラスの一部にアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムに剪断力を加えてもフィルムのずれは見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
実施例3で得られた積層体のポリビニルアセタール樹脂フィルム面にトリエチレングリコール-ジ-(2-エチルヘキサノエート)を適当量塗布し、縦20cm、横10cm、厚さ3mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01のガラス上に、空気が入らないように貼り合わせた。なお、アンテナ回路基板は、ガラスの縦方向端部から内方に2cm以上7cm以下の領域に配設された。
これらを50℃の熱風乾燥機で1時間加熱することにより、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムに剪断力を加えてもフィルムのずれは見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
トリエチレングリコール-ジ-(2-エチルヘキサノエート)に代えてジブトキシエチルアジペートを使用した以外は実施例17と同様にして、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムに剪断力を加えてもフィルムのずれは見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
熱風乾燥機での加熱を30℃、24時間に変更した以外は実施例17と同様にして、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムに剪断力を加えてもフィルムのずれは見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナシステムの作製>
熱風乾燥機での加熱を30℃に変更した以外は実施例18と同様にして、ガラス(第1のガラス層)/ポリビニルアセタール樹脂フィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)/ポリビニルアセタール樹脂フィルム(低誘電層)/薄板ガラス(保護層)の順で積層され、ガラスの一部に、保護ガラス板付きアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムに剪断力を加えてもフィルムのずれは見られなかった。また、得られたアンテナシステムにおいて、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
<アンテナ回路基板の作製>
熱可塑性液晶ポリマーフィルム(株式会社クラレ製、ベクスター(登録商標)、厚さ50μm、X方向の誘電率:3.4、Y方向の誘電率:3.4、X方向の誘電正接:0.002、Y方向の誘電正接:0.002)の両面に銅箔(福田金属箔粉工業株式会社製、電解銅箔「H9A」、厚さ12μm)を重ね合わせ、真空熱プレス装置を用いて、加熱盤を290℃に設定し、4MPaの圧力下、15分間、圧着して、銅箔/熱可塑性液晶ポリマーフィルム/銅箔の構成の銅張積層板を作製した。得られた銅張積層板の一方の面の銅箔の一部をエッチング液により除去することで、回路を形成し、この操作を繰り返すことにより厚さ400μmのアンテナ回路基板(縦3cm、横3cm)を作製した。
縦20cm、横10cm、厚さ3.5mm、X方向の誘電率:6.5、Y方向の誘電率:6.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01のガラスの上に、縦3cm、横3cmのポリビニルアセタールフィルム(株式会社クラレ製、V200KE、厚さ700μm、X方向の誘電率:2.7、Y方向の誘電率:2.7、X方向の誘電正接:0.02、Y方向の誘電正接:0.02)を、フィルムの上端がガラスの縦方向の上端から2cm下側(内方)であり、フィルムの横方向の中央部が、ガラスの横方向の中央部と重なるように配置し、その上に、上記で作製したアンテナ回路基板を、回路を有する面がポリビニルアセタールフィルムに接するように配置した。その後、アンテナ回路基板の位置を保持した状態でガラスを真空バックに入れ、減圧下で100℃で30分間処理し、冷却後に減圧を解除して、アンテナ回路基板をガラスに対してプレラミネートした。その後、これをオートクレーブに投入し、140℃、1.2MPaで30分間処理し、ガラス(第1のガラス層)/ポリビニルアセタールフィルム(低誘電層)/回路(回路層)/アンテナ回路基板内層(熱可塑性液晶ポリマーフィルムを絶縁層とする多層基板)/銅箔(導体層)の順でガラスの一部にアンテナ回路基板が配設されたアンテナシステムを得た。得られたアンテナシステムでは、低誘電層の厚さdfは、700μmであり、対象とする波長λ(1.47mm)の高周波に対して、λ/4×n±0.050mm(n=2)の範囲を満たしている。
また、低誘電層の厚さは、λ/4×n±0.050mmの範囲を満たすため、効率よく高周波をアンテナ回路基板へ到達させることができる。
実施例21で用いられた低誘電層に代えて、ポリビニルアセタールフィルム[MFR(190゜C、2.16kg)0.75g/10分、厚さ50μm、X方向の誘電率:2.5、Y方向の誘電率:2.5、X方向の誘電正接:0.01、Y方向の誘電正接:0.01]を複数枚重ねて用いる以外は、実施例21と同様にしてアンテナシステムを作製する場合も、実施例21と同様に、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
実施例21で用いられた低誘電層に代えて、アイオノマーフィルム(株式会社クラレ製、SGR5000、厚さ1000μm、X方向の誘電率:2.2、Y方向の誘電率:2.2、X方向の誘電正接:0.002、Y方向の誘電正接:0.002)を用いる以外は、実施例21と同様にしてアンテナシステムを作製する場合も、実施例21と同様に、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
実施例21で用いられたアンテナ回路基板の熱可塑性液晶ポリマーフィルムに代えて、ポリイミドフィルム(東レ・デュポン株式会社製、カプトン300H、厚さ75μm、X方向の誘電率:3.3、Y方向の誘電率:3.3、X方向の誘電正接:0.007、Y方向の誘電正接:0.007)を用い、アンテナ回路基板内での接着を、低誘電接着剤であるニッカン工業(株)製SAFY(誘電率:3、誘電正接:0.005)を用いて行う以外は、実施例21と同様にしてアンテナシステムを作製する場合も、実施例21と同様に、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
実施例24で用いられたポリイミドフィルムに代えて、ポリイミドフィルム(株式会社カネカ製、アピカルNPI、厚さ50μm、X方向の誘電率:3.4、Y方向の誘電率:3.4、X方向の誘電正接:0.004、Y方向の誘電正接:0.004)を用いる以外は、実施例24と同様にしてアンテナシステムを作製する場合も、実施例21と同様に、低誘電層はガラスより小さい誘電率を有するため、ガラスへ入射した高周波は、低誘電層を透過し、アンテナ回路基板へ到達することができる。
101,201,301,401,501,601…第1のガラス層
202,302,502,602…第2のガラス層
103,203,303,403…低誘電層
503a,603a…第1の低誘電層
503b,603b…第2の低誘電層
104…回路層
105…高周波絶縁層
106…導体層
107…アンテナ回路基板
308…接着層
408a,408b…固着手段
409…被着体
Claims (15)
- 高周波を透過させる第1のガラス層と、
前記第1のガラス層より低い誘電率を有するとともに、前記第1のガラス層に隣接し、前記第1のガラス層から入射した高周波を透過させる低誘電層と、
前記低誘電層に隣接し、前記低誘電層から入射した高周波を受信する高周波絶縁層を含むアンテナ回路基板と、
で構成された、1GHz以上の周波数で使用するためのアンテナシステム。 - 請求項1に記載のアンテナシステムであって、高周波絶縁層が、熱可塑性液晶ポリマーまたはポリイミドで構成される、アンテナシステム。
- 請求項1または2に記載のアンテナシステムであって、周波数28GHzにおいて測定される、平面における一方向およびそれに直行する方向の双方の誘電率として、前記第1のガラス層の誘電率εgが5.5~7.5であり、前記低誘電層の誘電率εfが2.0~4.0である、アンテナシステム。
- 請求項1~3のいずれか一項に記載のアンテナシステムであって、周波数28GHzにおいて測定される、平面における一方向およびそれに直行する方向の双方の、誘電正接として、前記第1のガラス層の誘電正接tanδgが0.05以下であり、前記低誘電層の誘電正接tanδfが0.05以下である、アンテナシステム。
- 請求項1~4のいずれか一項に記載のアンテナシステムであって、前記低誘電層がポリビニルアセタール樹脂、オレフィン-カルボン酸ビニル共重合体樹脂、アイオノマー樹脂、およびアクリル系樹脂からなる群から選択される少なくとも一種で構成される、アンテナシステム。
- 請求項1~5のいずれか一項に記載のアンテナシステムであって、周波数28GHzにおいて測定される、平面における一方向およびそれに直行する方向の双方の誘電率として、前記高周波絶縁層の誘電率εpが2.0~4.0である、アンテナシステム。
- 請求項1~6のいずれか一項に記載のアンテナシステムであって、周波数28GHzにおいて測定される、平面における一方向およびそれに直行する方向の双方の誘電正接として、前記高周波絶縁層の誘電正接tanδpが0.010以下である、アンテナシステム。
- 請求項1~7のいずれか一項に記載のアンテナシステムであって、前記低誘電層の誘電率εfと、前記高周波絶縁層の誘電率εpとが、εf/εp=30/70~60/40である、アンテナシステム。
- 請求項1~8のいずれか一項に記載のアンテナシステムであって、前記低誘電層の厚さがλ/4×n±0.050mm(ここで、λは高周波の波長であり、nは整数)である、アンテナシステム。
- 請求項1~9のいずれか一項に記載のアンテナシステムであって、前記第1のガラス層が、ソーダ石灰ガラス、ホウ酸ガラス、ホウ珪酸ガラス、アルミノ珪酸ガラス、石英ガラス、無アルカリガラス、および低アルカリガラスから選ばれる少なくとも1種で構成される、アンテナシステム。
- 請求項1~10のいずれか一項に記載のアンテナシステムであって、さらに第2のガラス層を含み、前記第1のガラス層と前記第2のガラス層との間に、低誘電層およびアンテナ回路基板が少なくとも配設される、アンテナシステム。
- 請求項1~11のいずれか一項に記載のアンテナシステムであって、乗り物または建物の窓ガラスを構成する、アンテナシステム。
- 請求項1~11のいずれか一項に記載のアンテナシステムであって、乗り物、建物または土木構造物に対して付着した状態で電波を受信するための、アンテナシステム。
- 請求項1~13のいずれか一項に記載のアンテナシステムに用いられるための、アンテナ回路基板。
- 請求項1~14のいずれか一項に記載のアンテナシステムに用いられるための、アンテナ回路基板と、当該アンテナ回路基板に隣接する低誘電層とを含む、積層体。
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- 2020-11-30 EP EP20897408.9A patent/EP4071926A4/en not_active Withdrawn
- 2020-11-30 CN CN202080083854.4A patent/CN114762188A/zh active Pending
- 2020-11-30 WO PCT/JP2020/044470 patent/WO2021112032A1/ja not_active Ceased
- 2020-11-30 JP JP2021562633A patent/JP7623954B2/ja active Active
- 2020-12-02 TW TW109142333A patent/TW202139512A/zh unknown
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2022
- 2022-06-02 US US17/805,051 patent/US20220302581A1/en not_active Abandoned
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023140261A1 (ja) | 2022-01-18 | 2023-07-27 | 株式会社クラレ | アンテナシステムおよびその製造方法並びに設計方法 |
| KR20240140074A (ko) | 2022-01-18 | 2024-09-24 | 주식회사 쿠라레 | 안테나 시스템 및 그 제조 방법 그리고 설계 방법 |
| WO2023171115A1 (ja) * | 2022-03-10 | 2023-09-14 | 株式会社村田製作所 | アンテナ装置およびそれを搭載する通信装置 |
| WO2023176727A1 (ja) * | 2022-03-17 | 2023-09-21 | Agc株式会社 | 車両用アンテナ装置 |
| US12311637B2 (en) | 2022-11-04 | 2025-05-27 | Agc Automotive Americas Co. | Laminated glazing assembly including an antenna assembly |
| WO2024262453A1 (ja) * | 2023-06-22 | 2024-12-26 | Agc株式会社 | アンテナ装置、及び、無線通信装置 |
| WO2025013703A1 (ja) * | 2023-07-10 | 2025-01-16 | Agc株式会社 | アンテナ装置及び無線通信装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114762188A (zh) | 2022-07-15 |
| JP2025092526A (ja) | 2025-06-19 |
| US20220302581A1 (en) | 2022-09-22 |
| EP4071926A1 (en) | 2022-10-12 |
| WO2021112032A1 (ja) | 2021-06-10 |
| TW202139512A (zh) | 2021-10-16 |
| JPWO2021112031A1 (ja) | 2021-06-10 |
| JPWO2021112032A1 (ja) | 2021-06-10 |
| EP4071926A4 (en) | 2023-12-27 |
| JP7623954B2 (ja) | 2025-01-29 |
| JP7657729B2 (ja) | 2025-04-07 |
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