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WO2018008615A1 - Dispositif électronique - Google Patents

Dispositif électronique Download PDF

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Publication number
WO2018008615A1
WO2018008615A1 PCT/JP2017/024415 JP2017024415W WO2018008615A1 WO 2018008615 A1 WO2018008615 A1 WO 2018008615A1 JP 2017024415 W JP2017024415 W JP 2017024415W WO 2018008615 A1 WO2018008615 A1 WO 2018008615A1
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WO
WIPO (PCT)
Prior art keywords
conductor
coil
loop
inductor bridge
axis direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/024415
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English (en)
Japanese (ja)
Inventor
邦明 用水
一史 愛須
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to CN201790000899.4U priority Critical patent/CN209249234U/zh
Publication of WO2018008615A1 publication Critical patent/WO2018008615A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor

Definitions

  • the present invention relates to an electronic device, and particularly to an electronic device including an inductor bridge having an inductance component.
  • FIG. 11 is an exploded perspective view of one inductor bridge 100 shown in Patent Document 1.
  • the inductor bridge 100 includes a flexible insulating base (a laminate of base layers 11a, 12a, 13a, and 14a) and a helical coil (loop conductors 31a, 32a, and 33a) formed on the insulating base. , 34a, a helical coil).
  • the flexible inductor bridge when the flexible inductor bridge is provided in a limited space inside the electronic device, it may be provided in a state where a predetermined portion is bent. However, when the inductor bridge is bent, the interlayer capacitance of the helical coil may change with deformation of the insulating base material, and the electrical characteristics of the helical coil may change before and after bending.
  • An object of the present invention is to provide an electronic device including an inductor bridge in which stray capacitance generated between other metal bodies is reduced and fluctuation of electrical characteristics due to deformation is suppressed.
  • the electronic device of the present invention An inductor bridge, a first circuit, a second circuit, and a metal body; The first circuit and the second circuit are connected via the inductor bridge;
  • the inductor bridge is An insulating base material having a first main surface and having flexibility;
  • a conical coil formed on the insulating substrate and having a winding axis perpendicular to the first main surface;
  • Have The conical coil is configured to include a plurality of loop-shaped conductors arranged along the winding axis direction of the conical coil, The change along the winding axis direction of the inner and outer diameters of the plurality of loop-shaped conductors is one direction, The plurality of loop-shaped conductors do not overlap each other when viewed from the winding axis direction,
  • the small-diameter loop conductor having the smallest inner and outer diameters among the plurality of loop conductors is arranged closer to the metal body than the other loop conductors.
  • the small-diameter loop-shaped conductor has the smallest inner and outer diameters among the plurality of loop-shaped conductors and the line length is short, and therefore has a smaller conductor area than other loop-shaped conductors. Therefore, with this configuration, the stray capacitance generated between the conical coil and the metal body is smaller than in the case where another loop conductor having a relatively large conductor area is disposed close to the other metal body. Get smaller.
  • the other loop-shaped conductor having a relatively large conductor area is disposed at a position farther from the other metal body than the small-diameter loop-shaped conductor, so even if the inductor bridge is bent, the conical coil The amount of change in stray capacitance between the metal body and other metal bodies is small. Further, in this configuration, since the large-diameter loop conductor and the small-diameter loop conductor do not face each other, the interlayer capacitance between the large-diameter loop conductor and the small-diameter loop conductor is small.
  • the insulating base material is preferably a laminate formed by laminating a plurality of base material layers made of a thermoplastic resin.
  • the insulating base material is a thermoplastic resin, the shape can be easily plastically processed according to the mounting state (unevenness or the like of the mounting destination).
  • the inductor bridge includes a bent portion in part.
  • the conical coil is wound more than two turns, and when viewed from the winding axis direction, a portion of the conical coil that is wound most inside is provided.
  • the first coil portion is defined, and the portion positioned n ⁇ 1 (n is an integer of 2 or more) toward the outer peripheral side with respect to the first coil portion is defined as the nth coil portion, and the first coil portion is defined.
  • the line width of the part is preferably narrower than the line widths of the other coil parts.
  • the line width of the n-th coil part is narrower than the line width of the n + 1-th coil part.
  • the nth coil portion is closer to the metal body than the (n + 1) th coil portion. Therefore, with this configuration, stray capacitance generated between the conical coil and the metal body can be effectively reduced as compared with the case where the line width of the (n + 1) th coil part is narrower than the line width of the nth coil part.
  • an inductor bridge in which a stray capacitance generated between other metal bodies is reduced and a change in electrical characteristics due to deformation is suppressed, and an electronic apparatus including the inductor bridge.
  • FIG. 1A is a perspective view of the inductor bridge 101 according to the first embodiment
  • FIG. 1B is an exploded perspective view of the inductor bridge 101
  • FIG. 2A is a plan view showing a portion where the conical coil 3 is formed in the inductor bridge 101
  • FIG. 2B is a cross-sectional view of that portion.
  • FIG. 3 is a cross-sectional view illustrating a main part of the electronic apparatus 301 according to the first embodiment.
  • FIG. 4 is a cross-sectional view sequentially showing the manufacturing process of the inductor bridge 101A.
  • FIG. 5A is a partial cross-sectional view showing the relationship between the inductor bridge 101 and the metal body 2 before bending, and FIG.
  • FIG. 5B shows the relationship between the inductor bridge 101 and the metal body 2 in a bent state. It is a fragmentary sectional view shown.
  • 6A is a partial cross-sectional view of another inductor bridge 101A according to the first embodiment
  • FIG. 6B is a partial cross-sectional view of an inductor bridge 101B of a comparative example.
  • FIG. 7 is a cross-sectional view showing a main part of an electronic device 302 according to the second embodiment.
  • FIG. 8 is a cross-sectional view illustrating a main part of an electronic device 303 according to the third embodiment.
  • FIG. 9A is a plan view showing a portion where the conical coil 3C is formed in the inductor bridge 104 according to the fourth embodiment, and FIG.
  • FIG. 9B is a cross-sectional view of that portion.
  • FIG. 10A is a plan view showing a portion where the conical coil 3D is formed in the inductor bridge 105 according to the fifth embodiment, and FIG. 10B is a cross-sectional view of that portion.
  • FIG. 11 is an exploded perspective view of one inductor bridge disclosed in Patent Document 1. In FIG.
  • FIG. 1A is a perspective view of the inductor bridge 101 according to the first embodiment
  • FIG. 1B is an exploded perspective view of the inductor bridge 101
  • FIG. 2A is a plan view showing a portion where the conical coil 3 is formed in the inductor bridge 101
  • FIG. 2B is a cross-sectional view of that portion.
  • the protective layer 1 and the base material layer 14 are not shown, and the opening BR surrounded by the large-diameter loop conductor 32 is shown by a dot pattern.
  • the inductor bridge 101 includes an insulating base 10, a conical coil 3 (described in detail later) formed on the insulating base 10, and connectors 51 and 52.
  • the insulating substrate 10 is a rectangular parallelepiped thermoplastic resin flat plate having a first main surface VS1 and a second main surface VS2 facing the first main surface VS1, and having a longitudinal direction coinciding with the X-axis direction.
  • the “first main surface” in the present embodiment is arranged so as to face a member (for example, a mounting substrate or a housing) having a metal body (described in detail later) in a state where the inductor bridge is provided in the electronic device. It is the surface to be done.
  • the “metal body” in the present embodiment is a metal member that is closest to the conical coil (inductor portion) provided in the inductor bridge in a state where the inductor bridge is provided in the electronic device, for example, a conductor pattern provided on the mounting substrate. And shield cases, metal housings, and the like.
  • the insulating base material 10 is a laminate formed by laminating the base material layers 11, 12, 13, 14 and the protective layer 1, and has flexibility.
  • the plurality of base material layers 11, 12, 13, and 14 are sheet-like flat plates made of a thermoplastic resin whose main material is a liquid crystal polymer, for example, whose planar shape is rectangular, the longitudinal direction of which coincides with the X-axis direction. .
  • the electrode 41 is formed on the back surface of the base material layer 11.
  • the electrode 41 is a conductor pattern having a rectangular planar shape disposed near the first end of the base material layer 11 (the right end of the base material layer 11 in FIG. 1B).
  • the electrode 41 is a conductor pattern such as a Cu foil.
  • a small-diameter loop conductor 31 and a conductor 21 are formed on the back surface of the base material layer 12.
  • the small-diameter loop-shaped conductor 31 is a rectangular loop-shaped conductor pattern of about 0.5 turns formed near the center of the base material layer 12.
  • the conductor 21 is a linear conductor pattern extending in the X-axis direction, and is disposed at a position near the first end of the base material layer 12 from the vicinity of the center of the base material layer 12.
  • the small-diameter loop conductor 31 and the conductor 21 are continuously formed, and the first end of the small-diameter loop conductor 31 is connected to the first end of the conductor 21.
  • a second end of the conductor 21 is connected to the electrode 41 via an interlayer connection conductor V ⁇ b> 1 formed on the base material layer 11.
  • the small-diameter loop conductor 31 and the conductor 21 are conductor patterns such as Cu foil, and the interlayer connection conductor V1 is a via conductor or a through hole, for example.
  • the “small-diameter loop conductor” refers to a loop-shaped conductor having the smallest inner / outer diameter (inner diameter and outer diameter) among a plurality of loop conductors constituting the conical coil.
  • a large-diameter loop conductor 32 and a conductor 22 are formed on the surface of the base material layer 13.
  • the large-diameter loop conductor 32 is a rectangular loop-shaped conductor pattern of about 1 turn formed near the center of the base material layer 13.
  • the small-diameter loop conductor 31 has a smaller inner and outer diameter than the large-diameter loop conductor 32.
  • the conductor 22 is a linear conductor pattern extending in the X-axis direction, and is closer to the second end of the base material layer 13 (the left end of the base material layer 13 in FIG. 1B) from near the center of the base material layer 13. Placed in position.
  • the first end of the large-diameter loop conductor 32 is connected to the small-diameter loop conductor 31 via an interlayer connection conductor V2 formed on the base material layers 12 and 13.
  • the large-diameter loop conductor 32 and the conductor 22 are continuously formed, and the second end of the large-diameter loop conductor 32 is connected to the first end of the conductor 22.
  • the large-diameter loop conductor 32 and the conductor 22 are conductor patterns such as Cu foil, and the interlayer connection conductor V2 is a via conductor or a through hole, for example.
  • the electrode 42 is formed on the surface of the base material layer 14.
  • the electrode 42 is a conductor pattern having a rectangular planar shape disposed near the second end of the base material layer 14 (the left end of the base material layer 14 in FIG. 1B).
  • the electrode 42 is connected to the second end of the conductor 22 via an interlayer connection conductor V3 formed on the base material layer 14.
  • the electrode 42 is a conductor pattern such as a Cu foil, and the interlayer connection conductor V3 is a via conductor or a through hole, for example.
  • the protective layer 1 has substantially the same planar shape as the base material layer 14 and is laminated on the surface of the base material layer 14.
  • the protective layer 1 has an opening AP1 corresponding to the position of the electrode 42. Therefore, the electrode 42 is exposed to the second main surface VS2 of the insulating base material 10.
  • the protective layer 1 is, for example, a solder resist film.
  • the protective layer 1 is not essential.
  • the connector 51 is provided on the first main surface VS1 of the insulating base material 10, and is disposed at the first end in the longitudinal direction of the insulating base material 10 (the right end of the insulating base material 10 in FIG. 1A).
  • the connector 51 is connected to the electrode 41.
  • the connector 52 is provided on the second main surface VS ⁇ b> 2 of the insulating base 10 and is disposed at the second end in the longitudinal direction of the insulating base 10 (the left end of the insulating base 10).
  • the connector 52 is connected to the electrode 42.
  • the rectangular conical coil 3 of about 1.5 turns is configured including the small-diameter loop conductor 31, the large-diameter loop conductor 32, and the interlayer connection conductor V2.
  • the conical coil 3 has a winding axis AX orthogonal to the first main surface VS1 and the second main surface VS2 (parallel to the Z-axis direction).
  • the plurality of loop-shaped conductors are arranged along the winding axis AX direction (Z-axis direction) of the conical coil 3.
  • the small-diameter loop-shaped conductor 31 having the smallest inner and outer diameters among the plurality of loop-shaped conductors is first than the other loop-shaped conductors (large-diameter loop-shaped conductor 32) in the Z-axis direction. Arranged close to main surface VS1.
  • the small-diameter loop conductor 31 is disposed inside the opening BR surrounded by the large-diameter loop conductor 32 when viewed from the Z-axis direction. Further, the plurality of loop-shaped conductors (small-diameter loop-shaped conductor 31 and large-diameter loop-shaped conductor 32) do not overlap each other when viewed from the Z-axis direction.
  • the change in the Z-axis direction of the inner and outer diameters of the plurality of loop-shaped conductors is one direction (see the outline DE of the conical coil 3 in FIG. 2B).
  • “the change along the winding axis direction is one direction” means that the inner and outer diameters of the plurality of loop-shaped conductors change so as to increase (or decrease) along the Z-axis direction.
  • the small-diameter loop-shaped conductor 31 is disposed closer to the first main surface VS1 than the other loop-shaped conductors (large-diameter loop-shaped conductor 32) in the Z-axis direction.
  • the large-diameter loop conductor 32 having the largest diameter is disposed farthest from the first main surface VS1 in the Z-axis direction as compared with the other loop-shaped conductors (small-diameter loop conductor 31). That is, as shown in the outline DE of the conical coil 3 in FIG. 2B, the inner and outer diameters of the plurality of loop conductors are directed in the + Z direction (from the first main surface VS1 side to the second main surface VS2 side). It has changed to become larger.
  • FIG. 3 is a cross-sectional view illustrating a main part of the electronic apparatus 301 according to the first embodiment.
  • the electronic device 301 includes an inductor bridge 101A, a circuit board 71, and a mounting board 201.
  • the circuit configured on the circuit board 71 corresponds to the “first circuit” in the present invention
  • the circuit configured on the mounting board 201 corresponds to the “second circuit” in the present invention.
  • the inductor bridge 101A differs from the inductor bridge 101 in that the insulating base material 10 includes a bent portion (bent portion) in part, and the other configurations are substantially the same.
  • the inductor bridge 101A is connected to a circuit board 71 and a mounting board 201.
  • the metal body 2 is mounted on the upper surface of the mounting substrate 201, and a conductor 81 is formed on the upper surface of the mounting substrate 201.
  • the receptacle 61 is connected to the conductor 81 and is electrically connected to a circuit configured on the mounting substrate 201.
  • the mounting substrate 201 is, for example, a printed wiring board, and the metal body 2 is, for example, a shield case or a battery pack.
  • a receptacle 62 is mounted on the lower surface of the circuit board 71.
  • the receptacle 62 is electrically connected to a first circuit formed on the circuit board 71.
  • the first circuit formed on the circuit board 71 is, for example, a radiating element of a UHF band antenna.
  • the connector 51 is connected to the receptacle 61, and the connector 52 is connected to the receptacle 62.
  • the inductor bridge 101 ⁇ / b> A is arranged so that the first main surface VS ⁇ b> 1 side of the insulating base 10 faces the main surface PS ⁇ b> 1 of the mounting substrate 201. Therefore, the small-diameter loop conductor 31 is arranged closer to the metal body 2 than the other loop conductors (large-diameter loop conductor 32).
  • FIG. 4 is a cross-sectional view sequentially showing the manufacturing process of the inductor bridge 101A.
  • a laminated body is formed by laminating a base layer patterned with small-diameter loop conductors, large-diameter loop conductors, conductors, electrodes, etc., and after coating the protective layer, the insulating base material from the aggregate substrate state Individual element bodies are separated to obtain an inductor bridge 101 shown in (1) in FIG.
  • the first main surface VS1 and the second main surface of the insulating base 10 are formed along the Z-axis direction using the upper die 5 and the lower die 6.
  • VS2 is heated and pressurized (see the arrow indicated by (2) in FIG. 4).
  • the position to be heated and pressed is a position closer to the first end (the right end of the insulating base material) from the center in the longitudinal direction (X-axis direction) of the insulating base material 10.
  • the upper mold 5 and the lower mold 6 have a structure in which a cross-sectional shape is bent into a predetermined shape.
  • the inductor bridge 101A is taken out from the upper mold 5 and the lower mold 6.
  • an inductor bridge 101A having a bent portion (bent portion) is obtained.
  • the inductor bridges 101 and 101A according to the present embodiment have the following effects.
  • the small-diameter loop conductor 31 is disposed closer to the metal body 2 than the large-diameter loop conductor 32 in the Z-axis direction with the inductor bridge 101 provided in the electronic device.
  • the small-diameter loop-shaped conductor 31 has the smallest inner and outer diameters among the plurality of loop-shaped conductors and a short line length, and therefore has a smaller conductor area than the other loop-shaped conductors (large-diameter loop-shaped conductor 32). Therefore, with this configuration, the stray capacitance generated between the conical coil 3 and the metal body 2 is smaller than when another loop conductor having a relatively large conductor area is disposed close to the metal body 2. .
  • the insulating base material 10 is a thermoplastic resin, as shown to (2) in FIG. 4, a shape is easy according to a mounting state (unevenness
  • the conical coil 3 is configured including the small-diameter loop conductor 31 and the large-diameter loop conductor 32 respectively formed on the plurality of base material layers 12 and 13. With this configuration, a conical coil having a predetermined number of turns and inductance can be formed on the insulating substrate 10.
  • a plurality of loop conductors small-diameter loop conductor 31 and large-diameter loop conductor 32
  • the plurality of loop conductors do not overlap each other when viewed from the Z-axis direction.
  • the loop-shaped conductors small-diameter loop-shaped conductor 31 and large-diameter loop-shaped conductor 32
  • the loop-shaped conductors do not face each other, so that the interlayer capacitance between the plurality of loop-shaped conductors is small.
  • FIG. 5A is a partial cross-sectional view showing the relationship between the inductor bridge 101 and the metal body 2 before bending
  • FIG. 5B shows the relationship between the inductor bridge 101 and the metal body 2 in a bent state. It is a fragmentary sectional view shown.
  • the inductor bridge 101 is bent in an L shape (with the first main surface VS1 side inward) along the longitudinal direction of the insulating base material 10.
  • the second main surface VS2 side is deformed to be pulled by the bending displacement of the insulating base material 10, and the first main surface VS1 side is deformed to be compressed.
  • the large-diameter loop conductor 32 positioned closer to the second main surface VS2 in the Z-axis direction extends toward both ends of the insulating base 10 in the longitudinal direction. Displacement (see hollow arrow DF2 in FIG. 5B).
  • the small-diameter loop conductor 31 located closer to the first main surface VS1 in the Z-axis direction is displaced so as to contract (the hollow arrow DF1 in FIG. 5B). reference).
  • the small-diameter loop conductor 31 and the large-diameter loop conductor 32 do not overlap when viewed from the Z-axis direction (between surfaces). Therefore, the amount of change in the interlayer capacitance between the small-diameter loop conductor 31 and the large-diameter loop conductor 32 is small.
  • another loop conductor (large diameter loop conductor 32) having a relatively large conductor area is separated from the metal body 2 more than the small diameter loop conductor 31. Placed in a different position. Therefore, even when the inductor bridge 101 is bent and another loop conductor having a large conductor area (large diameter loop conductor 32) is deformed, the amount of change in the stray capacitance between the conical coil 3 and the metal body 2 is small. .
  • the inductor bridge 101 when the inductor bridge 101 is bent, the small-diameter loop conductor 31 is also deformed and the conductor area changes.
  • the metal body 2 accompanying a change in the conductor area can be obtained as compared with the case where another loop conductor (large diameter loop conductor 32) having a relatively large conductor area is disposed close to the metal body 2. The amount of stray capacitance change between and is small.
  • the inductor bridge in the present invention may have the following configuration.
  • 6A is a partial cross-sectional view of another inductor bridge 101A according to the first embodiment
  • FIG. 6B is a partial cross-sectional view of an inductor bridge 101B of a comparative example.
  • 6A and 6B the thicknesses of the small-diameter loop conductors 31A and 31B and the large-diameter loop conductors 32A and 32B are exaggerated.
  • the small-diameter loop conductors 31A and 31B and the large-diameter loop conductors 32A and 32B related to the inductor bridges 101A and 101B are connected to the inductor bridge 101 shown in FIG.
  • the small-diameter loop conductor 31 and the large-diameter loop conductor 32 are thicker in the Z-axis direction.
  • the thickness in the Z-axis direction of the small-diameter loop conductors 31A and 31B and the large-diameter loop conductors 32A and 32B is thicker than the thickness in the Z-axis direction of each base material layer before lamination.
  • the thickness T1 in the Z-axis direction of the insulating base material 10A of the inductor bridges 101A and 101B is equal to the thickness in the Z-axis direction of the insulating base material 10 of the inductor bridge 101 shown in FIG.
  • the distance L2 between the small-diameter loop conductor 31B and the large-diameter loop conductor 32B is The distance L1 between the small-diameter loop conductor 31A and the large-diameter loop conductor 32A is shorter (L1> L2). Therefore, when an external force causing bending is applied to the inductor bridge 101B of the comparative example, the amount of change in the interlayer capacitance of the conical coil 3B due to the deformation of the inductor bridge 101B is large.
  • the small-diameter loop-shaped conductor 31A and the large-diameter loop-shaped conductor 32A do not overlap when viewed from the Z-axis direction, and therefore the change in the interlayer capacitance of the conical coil 3A accompanying the deformation of the inductor bridge 101A.
  • the amount is small.
  • the portion where the conical coil 3A is formed becomes difficult to bend, and the mechanical strength against external force is increased. Furthermore, the DCR (direct current resistance) of the conical coil 3A can be reduced by increasing the thickness in the Z-axis direction of the small-diameter loop conductor 31A and the large-diameter loop conductor 32A.
  • Second Embodiment a structure different from the electronic device shown in the first embodiment will be described.
  • FIG. 7 is a cross-sectional view showing a main part of the electronic device 302 according to the second embodiment.
  • the electronic device 302 includes an inductor bridge 102, a resin casing 91, and a mounting substrate 202.
  • a conductor pattern 4 is formed on the inner surface of the resin casing 91.
  • the conductor pattern 4 is, for example, a ground conductor.
  • the circuit configured on the mounting substrate 202 corresponds to the “first circuit” in the present invention
  • the circuit (ground conductor) configured in the resin casing 91 corresponds to the “second circuit” in the present invention. To do.
  • the inductor bridge 102 is connected to the conductor pattern 4 of the resin casing 91 and the conductor 82 of the mounting substrate 202.
  • the inductor bridge 102 differs from the inductor bridge 101 according to the first embodiment in that a part of the inductor bridge is bent. Other configurations are substantially the same as those of the inductor bridge 101.
  • Conductors 82 and 84 are formed on the top surface of the mounting substrate 202, and a conductor 83 is formed inside the mounting substrate 202.
  • the receptacle 62 is connected to the conductor 82 and is electrically connected to a circuit configured on the mounting substrate 202.
  • the mounting board 202 is, for example, a printed wiring board.
  • the conductor 84 is the “metal body” in the present invention.
  • a receptacle 61 is mounted on the inner surface of the resin casing 91.
  • the receptacle 61 is electrically connected to the conductor pattern 4 (ground conductor) formed in the resin casing 91.
  • the connector 51 of the inductor bridge 102 is connected to the receptacle 61, and the connector 52 is connected to the receptacle 62.
  • the inductor bridge 102 is connected to the mounting substrate 202 and the resin casing 91, and as shown in FIG. 7, the small-diameter loop conductor 31 is more conductive than the other loop conductors (large-diameter loop conductor 32).
  • 84 metal body
  • the inductor bridge 102 the portion where the conical coil 3 is formed is exposed from the opening OP1 formed in the resin casing 91. Therefore, the conical coil 3 is not shielded from the electromagnetic field. Therefore, this inductor bridge 102 can be used as an antenna, and communication with the outside becomes possible.
  • the inductor bridge 102 is bent in an L shape at a portion where the conical coil 3 is not formed. Specifically, the inductor bridge 102 is connected to the mounting substrate 202 and the conductor pattern 4 of the resin casing 91, and the first end from the center in the longitudinal direction of the insulating base material 10C (the insulating base material 10C in FIG. 7). The position near the right end) is bent in an L shape with the first main surface VS1 inside.
  • the first main surface VS1 side is stressed in the ⁇ X direction
  • the second main surface VS2 side is stressed in the + X direction. Therefore, the small-diameter loop conductor 31 positioned closer to the first main surface VS1 in the Z-axis direction is displaced so that its inner and outer diameters are reduced (see the hollow arrow DF1a in FIG. 7). Further, the large-diameter loop conductor 32 positioned closer to the second main surface VS2 in the Z-axis direction is displaced so that its inner and outer diameters are expanded (see the hollow arrow DF2a in FIG. 7).
  • the small-diameter loop conductor 31 and the large-diameter loop conductor 32 do not overlap when viewed from the Z-axis direction. And the change in the interlayer capacitance between the large-diameter loop conductor 32 is small.
  • the small-diameter loop-shaped conductor 31 has an inner and outer diameter that is “relatively” along the insulating substrate 10 as compared with other loop-shaped conductors (large-diameter loop-shaped conductor 32) when the inductor bridge is bent. It is preferable to arrange in a contracted position.
  • the inductor bridge 102 is connected to the conductor pattern 4 formed on the inner surface of the resin casing 91 via the receptacle 61 is shown, but the present invention is not limited to this configuration.
  • the inductor bridge may be connected to the metal casing by screwing or the like.
  • FIG. 8 is a cross-sectional view showing a main part of an electronic device 303 according to the third embodiment.
  • the electronic device 303 includes an inductor bridge 103, a resin casing 92, and a mounting substrate 203.
  • a conductor pattern 4 (ground conductor) is formed on the inner surface of the resin casing 92.
  • the conductor pattern 4 formed on the inner surface of the resin casing 92 is the “metal body” in the present invention.
  • a conductor 82 is formed on the upper surface of the mounting substrate 203, and a conductor 83 is formed inside the mounting substrate 203.
  • the inductor bridge 103 is connected to the conductor pattern 4 of the resin casing 92 and the conductor 82 of the mounting substrate 203.
  • the inductor bridge 103 is the inductor bridge 102 according to the second embodiment in that the small-diameter loop conductor 31 is disposed closer to the conductor pattern 4 than the other loop conductors (large-diameter loop conductor 32). And different. Other configurations are substantially the same as those of the inductor bridge 102.
  • the fourth embodiment shows an example in which the structure of the conical coil is different from the inductor bridge shown in the first embodiment.
  • FIG. 9A is a plan view showing a portion where the conical coil 3C is formed in the inductor bridge 104 according to the fourth embodiment, and FIG. 9B is a cross-sectional view of that portion.
  • the protective layer 1 is not shown for easy understanding of the structure.
  • the inductor bridge 104 is different from the inductor bridge 101 according to the first embodiment in the structure of the conical coil. Other configurations are substantially the same as those of the inductor bridge 101. Hereinafter, a different part from 1st Embodiment is demonstrated.
  • a large-diameter loop conductor 33C is formed on the surface of the base material layer 14.
  • the large-diameter loop conductor 33C has a larger inner and outer diameter than the large-diameter loop conductor 32C and the small-diameter loop conductor 31C.
  • the large-diameter loop conductor 32C has a larger inner and outer diameter than the small-diameter loop conductor 31C.
  • Inductor bridge 104 includes a rectangular conical coil of about 3.5 turns including small-diameter loop conductor 31C, large-diameter loop conductors 32C and 33C, and interlayer connection conductors formed on a plurality of base material layers 12, 13, and 14, respectively. 3C is configured.
  • a plurality of loop conductors are arranged along the Z-axis direction.
  • the small-diameter loop conductor 31C having the smallest inner and outer diameters is disposed closer to the first main surface VS1 than the other loop conductors (large-diameter loop conductors 32C and 33C) in the Z-axis direction.
  • the change along the Z-axis direction of the inner and outer diameters of the plurality of loop-shaped conductors is one direction.
  • the inner and outer diameters of the plurality of loop conductors are in the + Z direction (from the first main surface VS1 side to the second main surface). It changes so as to increase toward the VS2 side.
  • the small-diameter loop conductor 31C is disposed inside the opening surrounded by the large-diameter loop conductor 32C, and the large-diameter loop conductor 32C is inside the opening surrounded by the large-diameter loop conductor 33C. Is arranged.
  • the inner and outer diameters of the plurality of loop-shaped conductors are not limited to those that change uniformly along the Z-axis direction. That is, the inner and outer diameters of the plurality of loop-shaped conductors are not limited to those that change in one direction in proportion to the movement distance in the Z-axis direction.
  • the inner and outer diameters of four loop conductors (including small-diameter loop conductors) in the + Z direction are 2X ⁇ 4X ⁇ 5X ⁇ 8X (X is an arbitrary number)
  • the configuration arranged along the Z-axis direction so as to be in this order is also included in the “change along the winding axis direction is one direction” in the present invention. In this case, it is a condition that the four loop-shaped conductors do not overlap each other when viewed from the Z-axis direction.
  • the inner and outer diameters of four loop conductors (including small-diameter loop conductors) in the + Z direction are 2X ⁇ 5X ⁇ 3X ⁇ 4X (X is an arbitrary number) ) Are arranged along the Z-axis direction so as to be in the order of “), and are excluded from the state of“ the change along the winding axis direction is one direction ”in the present invention.
  • FIG. 10A is a plan view showing a portion where the conical coil 3D is formed in the inductor bridge 105 according to the fifth embodiment, and FIG. 10B is a cross-sectional view of that portion.
  • the first coil portion CP1 is indicated by hatching
  • the second coil portion CP2 is indicated by a dot pattern
  • the fourth coil portion CP4 is indicated by cross hatching.
  • the inductor bridge 105 is different from the inductor bridge 101 according to the first embodiment in the structure of a conical coil. Other configurations are substantially the same as those of the inductor bridge 101. Hereinafter, a different part from 1st Embodiment is demonstrated.
  • the conical coil 3C includes a large-diameter loop conductor 34D, a large-diameter loop conductor 33D, a large-diameter loop conductor 32D, a small-diameter loop conductor 31D, and an interlayer connection conductor (not shown).
  • the conical coil 3C has a winding axis AX that is orthogonal to the first main surface VS1 and the second main surface VS2 (parallel to the Z-axis direction).
  • the conical coil 3C is wound more than 2 turns (about 3.5 turns) and has a first coil part CP1, a second coil part CP2, a third coil part CP3, and a fourth coil part CP4.
  • the first coil portion CP1 is a portion that winds most inside the conical coil 3C when viewed from the Z-axis direction.
  • the second coil portion CP2 is a portion that is first positioned toward the outer peripheral side with respect to the first coil portion CP1 when viewed from the Z-axis direction.
  • the third coil portion CP3 is a portion that is secondly located toward the outer peripheral side with respect to the first coil portion CP1 when viewed from the Z-axis direction.
  • the fourth coil portion is a portion located third from the first coil portion CP1 toward the outer peripheral side when viewed from the Z-axis direction.
  • a small-diameter loop conductor 31D of slightly more than 0.5 turns formed on the surface of the base material layer 11 is referred to as the first coil portion CP1.
  • a one-turn large-diameter loop conductor 32D formed on the surface of the material layer 12 coincides with the second coil portion CP2.
  • the one-turn large-diameter loop conductor 33D formed on the surface of the base material layer 13 coincides with the third coil portion CP3, and 1 formed on the surface of the base material layer 14
  • the large-diameter loop conductor 34D of the turn coincides with the fourth coil portion CP4.
  • the overall length of the first coil portion CP1 located on the innermost peripheral side is shorter than the other coil portions, and the overall length of the fourth coil portion CP4 is longer than the other coil portions.
  • the fourth coil portion CP4 is arranged in the long order, the fourth coil portion CP4, the third coil portion CP3, the second coil portion CP2, and the first coil portion CP1 are arranged in this order.
  • the line width T1 of the first coil portion CP1 is equal to the line width of the other coil portions (the line width T2 of the second coil portion CP2, the third coil). It is narrower than the line width T3 of the part CP3 and the line width T4 of the fourth coil part CP4. Further, the line width of the nth coil part is narrower than the line width of the (n + 1) th coil part. Specifically, the line width T2 of the second coil part CP2 is narrower than the line width T3 of the third coil part CP3, and the line width T3 of the third coil part CP3 is thinner than the line width T4 of the fourth coil part CP4. . When the line widths of the coil portions are arranged in order of narrowness, the first coil portion CP1, the second coil portion CP2, the third coil portion CP3, and the fourth coil portion CP4 become equivalent.
  • the inductor bridge 105 according to the present embodiment has the following effects in addition to the effects described in the first embodiment.
  • the line width T1 of the first coil portion CP1 is equal to the line width of the other coil portions (the line width T2 of the second coil portion CP2, the line width T3 of the third coil portion CP3, and the fourth coil). It is narrower than the line width T4) of the part CP4.
  • the conductor area of the first coil portion CP1 closest to the metal body 2 can be reduced. Therefore, with this configuration, the facing area between the first coil portion CP1 and the metal body 2 can be reduced, and the line width of the other coil portions can be reduced (that is, the conductor area of the other coil portions can be reduced). ), Stray capacitance generated between the conical coil 3D and the metal body 2 can be further suppressed.
  • the direct current resistance is reduced as compared with the case where the line widths of all the coil portions (the first coil portion CP1, the second coil portion CP2, the third coil portion CP3, and the fourth coil portion CP4) are reduced.
  • the stray capacitance generated between the conical coil 3D and the metal body 2 can be effectively reduced while being reduced.
  • the line width T2 of the second coil part CP2 is narrower than the line width T3 of the third coil part CP3, and the line width T3 of the third coil part CP3 is the line of the fourth coil part CP4.
  • the nth coil part is closer to the metal body 2 than the (n + 1) th coil part. Therefore, with this configuration, the stray capacitance generated between the conical coil 3D and the metal body 2 can be effectively reduced as compared with the case where the line width of the (n + 1) th coil part is narrower than the line width of the nth coil part. .
  • the conical coil 3D having four coil portions (the first coil portion CP1, the second coil portion CP2, the third coil portion CP3, and the fourth coil portion CP4) is shown, but the present invention is limited to this configuration. Is not to be done.
  • the “conical coil” of the present invention may have an n-th coil portion (n is an integer of 2 or more).
  • the n-th coil portion refers to a portion located at the (n ⁇ 1) th position toward the outer peripheral side with respect to the first coil portion CP1 when viewed from the Z-axis direction.
  • planar shape of an insulating base material is a rectangle
  • the planar shape of the insulating substrate can be changed as appropriate within the scope of the effects and effects of the present invention, and may be, for example, a polygon, a circle, an ellipse, an L shape, a crank shape, a T shape, a Y shape, or the like. .
  • an inductor bridge including an insulating base material formed by laminating four base material layers has been described.
  • the present invention is not limited to this configuration.
  • the number of base material layers forming the insulating base material can be appropriately changed within a range where the functions and effects of the present invention are exhibited.
  • the base material layer may be a single layer.
  • a conical coil of about 1.5 turns or 2.5 turns is configured including loop-shaped conductors formed on a plurality of base material layers. It is not limited to.
  • the number of turns of the conical coil provided in the inductor bridge can be changed as appropriate.
  • the outline of the conical coil viewed from the winding axis direction (Z-axis direction) may be, for example, a circle, an ellipse, a rectangle, or a polygon.
  • an example of a conical coil including a small-diameter loop conductor and a large-diameter loop conductor of less than one turn has been shown.
  • a spiral-shaped small-diameter loop conductor and a large-diameter loop including one or more turns are shown. You may comprise a conical coil including a conductor.
  • the example in which two connectors were provided on both the first main surface and the second main surface of the insulating base material was shown, it is not limited to this configuration.
  • the two connectors may be provided only on the first main surface of the insulating base material, or may be provided only on the second main surface. Further, the arrangement and number of connectors can be appropriately changed depending on the circuit configuration of the inductor bridge.
  • the connector is not essential. You may connect a connection part to a 1st circuit, a 2nd circuit, etc. by electroconductive joining materials, such as solder, without using a connector.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

Un dispositif électronique (301) comprend : un premier circuit (un substrat de circuit (71)); un second circuit (un circuit formé sur un substrat de montage (201)); un pont inducteur(101) reliant le premier circuit et le deuxième circuit; et un élément métallique (conducteur (81)) Le pont inducteur (101) est pourvu d'un matériau de base isolant (10) et d'une bobine conique (3) formée sur le matériau de base isolant (10). La bobine conique (3) est configurée en incluant une pluralité de conducteurs de boucle (conducteurs de boucle de petit diamètre (31) et des conducteurs de boucle de grand diamètre (32)) disposés le long de la direction de l'axe d'enroulement (direction de l'axe Z) Des changements le long de la direction de l'axe Z dans les diamètres interne et externe de la pluralité de conducteurs en boucle se produisent dans une seule direction. Les conducteurs de boucle de petit diamètre (31), qui ont les plus petits diamètres intérieur et extérieur parmi la pluralité de conducteurs de boucle, sont disposés plus près de l'élément métallique que les autres conducteurs en boucle (les conducteurs en boucle de grand diamètre (32))
PCT/JP2017/024415 2016-07-06 2017-07-04 Dispositif électronique Ceased WO2018008615A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201790000899.4U CN209249234U (zh) 2016-07-06 2017-07-04 电子设备

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JP2016-134156 2016-07-06
JP2016134156 2016-07-06

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WO2018008615A1 true WO2018008615A1 (fr) 2018-01-11

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10144543A (ja) * 1996-11-06 1998-05-29 Matsushita Electric Ind Co Ltd コイル部品
JP2003309011A (ja) * 2002-04-18 2003-10-31 Okaya Electric Ind Co Ltd 積層型インダクタ
JP2006294927A (ja) * 2005-04-12 2006-10-26 Murata Mfg Co Ltd 積層コイル
WO2014129279A1 (fr) * 2013-02-19 2014-08-28 株式会社村田製作所 Pont d'inductances et dispositif électronique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10144543A (ja) * 1996-11-06 1998-05-29 Matsushita Electric Ind Co Ltd コイル部品
JP2003309011A (ja) * 2002-04-18 2003-10-31 Okaya Electric Ind Co Ltd 積層型インダクタ
JP2006294927A (ja) * 2005-04-12 2006-10-26 Murata Mfg Co Ltd 積層コイル
WO2014129279A1 (fr) * 2013-02-19 2014-08-28 株式会社村田製作所 Pont d'inductances et dispositif électronique

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