WO2018225760A1 - 可撓性複合フィルム、それを用いた可撓性回路フィルム - Google Patents
可撓性複合フィルム、それを用いた可撓性回路フィルム Download PDFInfo
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- WO2018225760A1 WO2018225760A1 PCT/JP2018/021648 JP2018021648W WO2018225760A1 WO 2018225760 A1 WO2018225760 A1 WO 2018225760A1 JP 2018021648 W JP2018021648 W JP 2018021648W WO 2018225760 A1 WO2018225760 A1 WO 2018225760A1
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- film
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/044—Forming conductive coatings; Forming coatings having anti-static properties
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
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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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- 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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
- G02C7/049—Contact lenses having special fitting or structural features achieved by special materials or material structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
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- 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
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
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- 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
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2371/02—Polyalkylene oxides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2371/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
- C08J2371/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
Definitions
- the present invention relates to a novel flexible composite film and a flexible circuit film using the same, and more specifically, a functional resin film having various special functions is used as a base material, and the surface thereof is subjected to copper plating.
- the present invention relates to a flexible composite film in which a flat conductive film is formed, and a novel flexible circuit film obtained by converting the conductive film into a conductor circuit having a predetermined pattern using the flexible composite film as a starting material.
- a circuit board on which a conductor circuit having a predetermined pattern is formed and various semiconductor elements mounted thereon are incorporated. Then, a predetermined electrical signal is transmitted to the conductor circuit of the circuit board to drive the mounted semiconductor element, thereby exhibiting the overall function of the device.
- circuit board As a circuit board in that case, a rigid circuit board having a glass / epoxy resin composite plate as a base material and a copper conductor circuit formed on the surface has been used. With the recent expansion and diversification of IT and information technology application fields, various electronic devices and related components to be incorporated into them have been reduced in size and thickness, and high-density mounting of semiconductor elements on circuit boards. And multi-functionality are progressing. Correspondingly, with respect to circuit boards, which are also transmission paths for electrical signals to these devices, the transition from rigid board forms to flexible film forms has begun. Specifically, a flexible copper-clad laminated composite film made by sticking a copper foil to a thin insulating resin film, or a flexibility obtained by processing the copper foil of the composite film into a conductor circuit of a predetermined pattern Circuit films have been developed.
- an insulating resin film to be used not only is it excellent in electrical insulation, it has heat resistance against the amount of heat generated during actual operation as a circuit film, it is difficult to cause thermal deformation, It is selected considering the mechanical strength that does not damage against external impacts.
- a polyimide resin (PI) film is mainly used as an insulating resin film as a base material (see Patent Document 1).
- the dielectric breakdown voltage of PI is as high as about 400 KV / mm, which is excellent in electrical insulation, the linear expansion coefficient is about 15 to 20 ppm / ° C., the amount of thermal deformation is small, and the glass transition temperature. This is because it has a high heat resistance of about 300 ° C., and has a large tensile strength and elastic modulus and excellent mechanical properties.
- a method of manufacturing the above-described composite film using this PI film as a base material for example, a method of applying a PI varnish to a commercially available copper foil to form a two-layer composite film, a PI film with an epoxy adhesive on the copper foil
- Methods are known. In this way, a flexible composite film is produced in which a flat copper foil is stuck or laminated on the surface of the PI film.
- a conductor circuit having a predetermined pattern is formed on the surface of the PI film, and a flexible circuit film is manufactured.
- the base PI film has excellent heat resistance, for example, a semiconductor element can be directly mounted on the conductor circuit by soldering or wire bonding, or a connection terminal can be formed. Therefore, this flexible circuit film can exhibit a mother board function for driving the device.
- the flexible circuit film based on this PI film has the following problems.
- the water absorption rate of PI is about 1.6%, which is higher than that of other insulating resins. Therefore, when this circuit film is used in a hot and humid environment, dimensional change is likely to occur. This can also cause a malfunction of the circuit film.
- PI also has a dielectric constant of about 3.5 to 4.0 and is not particularly small. PI film polarization may occur depending on the electric field condition applied during use.
- the flexible composite film which is the starting material has a layer structure in which a commercially available copper foil and a PI film are basically directly bonded as described above. Yes.
- the surface of the copper foil is roughened in order to improve the adhesion to the film, and usually there are minute irregularities on the order of nm. Therefore, even in the case of a flexible circuit film manufactured using the same as a starting material, the same micro unevenness exists at the interface between the conductor circuit formed by processing the copper foil and the PI film as the base material.
- PVDF polyvinylidene fluoride resin
- a pressure sensor that converts a pressure change (change in physical quantity) from the external environment into an electric signal
- a non-contact temperature sensor that converts a temperature change in the external environment such as a human body into an electric signal
- the PVDF film is coated with, for example, silver ink on both sides or sputtered to form a flat electrode such as a thin silver coating on both sides, and an input / output terminal is attached to this electrode. It is used by connecting to a power supply via a lead wire.
- the present invention has been made in view of the above situation, and is a novel flexible composite film in which the surfaces of various functional resin films are plated and the surfaces are covered with a conductive film such as copper.
- the purpose is to provide.
- Another object of the present invention is to provide a novel flexible circuit film in which a conductive film made of plating is converted into a conductor circuit having a predetermined pattern using the flexible composite film as a starting material.
- a flexible composite comprising a functional resin film as a base material and a conductive film made of plating formed on at least one surface of the base material. A film is provided.
- the functional resin film is Polyetheretherketone resin (PEEK) film, polyvinylidene fluoride resin (PVDF) film, perfluoroalkoxy fluororesin (PFA) film, cycloolefin polymer resin (COP) film, polytetrafluoroethylene (PTFE) film, polyethylene terephthalate (PET) ) It is preferable to use a film, a thermoplastic elastomer (TPE) film, a transparent functional resin film, or a composite resin film containing a magnetic material.
- PEEK Polyetheretherketone resin
- PVDF polyvinylidene fluoride resin
- PFA perfluoroalkoxy fluororesin
- COP cycloolefin polymer resin
- PTFE polytetrafluoroethylene
- PET polyethylene terephthalate
- a flexible circuit film characterized in that a conductor circuit having a predetermined pattern formed by processing the conductive film of the flexible composite film.
- the flexible circuit film in which the conductor circuit is formed on the flexible composite film based on a polyether ether ketone resin film or a polyethylene terephthalate film is provided on a diaphragm of an acoustic device. It is suitable for use.
- the flexible circuit film in which the conductor circuit is formed on the flexible composite film based on a perfluoroalkoxy fluorine resin film or a cycloolefin polymer resin film is a flexible circuit board for high-speed transmission and a flexible antenna cable. It is suitable for use by being incorporated into a circuit board or a flexible circuit board for semiconductors.
- the flexible circuit film in which the conductor circuit is formed on the flexible composite film having a polyvinylidene fluoride resin film as a base material is suitable for use as an actuator.
- the flexible circuit film in which the conductive circuit is formed on the flexible composite film having the transparent functional resin film as a base material is suitable for use on a transparent body.
- a transparent body it is suitable for being incorporated into a contact lens or a spectacle lens.
- the conductive coating or conductor circuit formed on the surface functions as a transmission path of an electric signal, and at the same time, a predetermined substrate which is a base material by the electric signal.
- the functional resin film can exhibit a special function imparted to itself.
- changes in physical quantities from the external environment for example, volume changes, pressure changes, temperature changes, etc.
- the functional resin film as the base material and converted into electrical signals, and the electrical signals are converted into conductive films or conductors.
- a circuit can be transmitted to the sensing system.
- a functional resin film having a piezoelectric function as a base material, it is possible to perform mutual conversion between volume and electrical signal, mutual conversion between pressure and electrical signal, and mutual conversion between temperature and electrical signal. , Pressure sensors, non-contact temperature sensors, and the like.
- a functional resin film having a low dielectric constant or dielectric loss tangent is used as the base material, high frequency characteristics can be improved, and if a functional resin film having excellent surface smoothness is used, a minute amount at the interface between the conductive film and the conductor circuit can be obtained. Concavities and convexities are reduced, and signal loss can be reduced even when a high-frequency signal is transmitted.
- a functional resin film having high heat resistance and low water absorption is used as a base material, it is suitable for applications in which, for example, dimensional change hardly occurs and high dimensional accuracy is required.
- a transparent functional resin film having a circuit formed thereon for example, by laminating it on the transparent body, various electrical signals can be exchanged while maintaining the transparency of the transparent body.
- FIG. 2 is a cross-sectional view taken along the line II-II in FIG. It is sectional drawing which shows example B of the flexible circuit film of this invention.
- FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.
- film A a flexible composite film
- film B a flexible circuit film
- FIG. 1 is a perspective view showing an example of the film A
- FIG. 2 is a cross-sectional view taken along II-II in FIG.
- the film A is an integral structure composite film composed of a functional resin film 1 as a base material and a flat conductive film 2 covering the surface thereof.
- the conductive coating 2 is a copper plating coating formed by applying a copper plating method.
- FIG. 3 is a perspective view showing an example of the film B, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.
- This film B is an integrated circuit film composed of the same functional resin film 1 as the film A and a conductor circuit 3 having a predetermined pattern formed on the surface thereof.
- the conductor circuit 3 is formed by applying, for example, photolithography and etching techniques to the conductive coating (copper plating coating) 2 of the film A.
- the film-forming location of the copper plating film 2 is not limited to this, A function The both surfaces of the conductive resin film 1 may be sufficient.
- the copper plating film 2 it is not limited to the aspect which coat
- the functional resin film 1 will be described. Although it does not specifically limit as the functional resin film 1, Basically, it selects from the viewpoint of what kind of function the film A and the film B to manufacture are made to exhibit suitably.
- the PEEK film has a linear expansion coefficient that is about twice as large as that of the above-described PI film, and has a low tensile strength, but has a glass transition temperature higher than that of the PI film and excellent in heat resistance. And the water absorption rate is small, and it is difficult to cause dimensional change even in a high temperature and high humidity environment.
- Film A and Film B manufactured using PEEK film as a base material are suitable for use as an electric circuit that is directly attached to the surface of a diaphragm of an acoustic device such as a sound collecting microphone or speaker. It has characteristics. For example, in a speaker of an audio device, conventionally, since a current is passed through a voice coil that vibrates a diaphragm, it is necessary to wire a lead wire, and a wiring space is required, and a breakage or the like is caused at a connection portion of the lead wire due to vibration. There is also a risk.
- the conductor circuit 3 is formed on the functional resin film 1 itself, the wiring space can be made extremely small by directly attaching the conductor circuit 3 to the diaphragm. Since it vibrates with it, the possibility of disconnection at the wiring connection portion is reduced and the durability is excellent.
- a PET film has high heat resistance and hardly undergoes a dimensional change, it is suitable to be used by being attached to a diaphragm like the PEEK film.
- the film A and the film B manufactured using the PVDF film as a base material can be used as various actuators using a piezoelectric function.
- the film A and the film B manufactured using the PVDF film as a base material can be used as various actuators using a piezoelectric function.
- it can also be used for a diaphragm of an acoustic device such as a sound collecting microphone or a speaker that converts a volume (air vibration) into an electric signal by using a piezoelectric function.
- the PFA film is the same fluorine type as the PVDF film, but the main difference between the PFA film and the PVDF film is that the former has a smaller dielectric constant and dielectric loss tangent than the latter. Therefore, Film A and Film B manufactured using this PFA film as a base material are excellent in high frequency characteristics, and are suitable for devices that transmit high frequency signals, for example, as a flexible circuit board for high-speed transmission and a flexible circuit board for antenna cables. is there.
- the COP film is inferior in tensile strength and heat resistance to the PI film, but the water absorption and dielectric loss tangent are almost the same as the PFA film described above and small. Moreover, this film is excellent in surface smoothness, and has a large total light transmittance and excellent transparency. For this reason, the film A and the film B manufactured using the COP film as a base material have excellent high frequency characteristics and a small signal loss at the time of transmitting a high frequency signal. It can be incorporated as a flexible circuit board for transmission and a flexible circuit board for antenna cables. Since it is difficult to cause a dimensional change, it can be used for a flexible circuit board for a semiconductor that requires high dimensional accuracy.
- the transparent functional resin film having a predetermined transparency on which the conductor circuit 3 is formed includes various transparent bodies, for example, windshields, rear glasses, window glasses of vehicles such as automobiles, By providing it on transparent covers of instruments, window glass of buildings, etc., it is possible to exchange various electric signals while maintaining the characteristics of transparent bodies.
- a film B on which a conductive circuit 3 is formed using a transparent PFA film or COP film having excellent high-frequency characteristics as a base material it is simply pasted to various types of transparent glass to obtain a predetermined transparent
- the wireless communication between the conductor circuit 3 (such as a circuit for wireless communication connected to a temperature sensor or the like for detecting temperature) and various control devices that transmit and receive the information can be enabled.
- a transparent functional resin film it is preferable that it is a thing more than the transparency of the said transparent body so that the transparency of the transparent body of the attachment object attached by lamination
- the transparent functional resin film can be provided on a transparent body such as a contact lens or a spectacle lens.
- a thin wireless chip, blood glucose sensor, antenna circuit, and LED light are sandwiched between the two films that make up the soft contact lens material, and the glucose component of tears is sensed to detect changes in blood glucose levels externally.
- the wireless chip, the blood glucose level sensor, the antenna circuit, etc. need to be sandwiched between two films as thin as possible in order to reduce the discomfort of the wearer. Since the extremely thin conductor circuit 3 is integrally formed by plating, it is suitable for forming these thin sensors and circuits.
- a contact lens can be photographed by incorporating a micro camera, an image sensor, a wireless communication circuit, a pressure sensor, etc. and blinking.
- Such an electric circuit and sensor circuit can also be formed thinly and integrally by plating according to the film B of the present embodiment, which is suitable for these applications.
- various sensors, wireless communication circuits, and the like are also incorporated into glasses (including sunglasses, goggles, etc.) to take out electrical signals and capture peripheral information, acquire wearer's biological information, and the like.
- Technology is also known.
- the film B having the conductor circuit 3 formed by plating according to the present embodiment can be suitably used.
- the transparent functional resin film constituting the film B has transparency that does not impair the transparency of the contact lens or the spectacle lens itself. What you have is used.
- the transparent functional resin film used for the above-mentioned various transparent bodies especially transparent bodies that require high transparency such as contact lenses and eyeglass lenses, those having a total light transmittance of 80% or more are preferable. Those having a light transmittance of 85% or more are more preferred, and those having a total light transmittance of 90% or more are more preferred.
- a PI film and a COP film are suitable.
- the production of the film A and the film B will be sequentially described.
- copper plating is applied to the surface of the functional resin film 1 as a base material.
- physical surface roughening treatment performed by general resin plating is not performed. Therefore, in this embodiment, micro unevenness
- the skin effect of the conductor circuit 3 is suppressed, There is an effect that the signal loss is reduced.
- the surface of the functional resin film 1 is given conductivity by electroless copper plating or electroless nickel plating, and then electrolytic copper plating or electroless copper plating is performed thereon to form a copper plating film. 2 is formed.
- the copper plating film 2 may be formed only by the first electroless copper plating.
- the surface of the functional resin film 1 may be modified before the copper plating.
- the functional resin film 1 PEEK film, PVDF film, PET film, PFA film, COP film, etc.
- it is suitable by combining a plurality of types of ultraviolet irradiation treatment, plasma treatment, and chemical treatment.
- the surface can be modified.
- the film thickness of the copper plating film 2 to be formed can be adjusted by adjusting the plating time.
- the film A in which the surface of the functional resin film (base material) 1 is coated with the flat copper plating film 2 having a desired film thickness is manufactured.
- film B is produced using this film A as a starting material. Specifically, after a predetermined circuit pattern is printed on the surface of the copper plating film 2 of the film A using a photoresist, the resist pattern is photocured, and then the photoresist is not printed using an etching solution. The portion of the copper plating film 2 may be removed by etching.
- the copper plating film 2 of the film A is converted into a conductor circuit 3 having a predetermined pattern, and the copper conductor circuit 3 is formed on the surface of the functional resin film 1 as shown in FIGS. Film B is manufactured
- the film thickness of the copper plating film 2 in the film A is set to be extremely thin (for example, 2 to 5 ⁇ m)
- the width and height of the conductor circuit 3 formed on the film B can be refined. Therefore, the film B can be made into a circuit film having a fine circuit pattern.
- the copper plating film 2 is merely an example. Of course, other metal plating films such as nickel plating, gold plating, and silver plating can be used instead of the copper plating film 2 depending on the application. is there.
- the functional resin film serving as the base material polytetrafluoroethylene (PTFE), a urethane-based thermoplastic elastomer film, a composite resin film containing a magnetic material, or the like can also be used.
- PTFE polytetrafluoroethylene
- a composite resin film containing a magnetic material is excellent in electromagnetic wave shielding properties and is therefore suitable for forming a circuit for high-frequency high-speed transmission. Moreover, it is suitable for weight reduction compared with the conventional electromagnetic wave shielding material.
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Abstract
Description
最近、IT・情報技術の適用分野が拡大し多様化していることに伴い、各種の電子機器やそれに組み込む関連部材に関しては、形状の小型化・薄型化、回路基板への半導体素子の高密度実装化、多機能化などが進んでいる。そして、そのことに対応して、これら機器への電気信号の伝送経路でもある回路基板に関しても、リジッドな基板形態からフレキシブルなフィルム形態への移行が進み始めている。具体的には、薄い絶縁樹脂フィルムに銅箔を貼着して成る可撓性の銅張積層複合フィルムや、その複合フィルムの銅箔を加工して所定パターンの導体回路に転化した可撓性の回路フィルムなどが開発されている。
このような可撓性回路フィルム場合、基材のPIフィルムが耐熱性に優れているので例えばはんだ付けやワイヤボンディングによって当該導体回路に直接半導体素子を搭載したり、接続端子を形成することができ、もってこの可撓性回路フィルムを機器駆動のためのマザーボード的な機能を発揮させることができる。
まずPIの吸水率は1.6%程度と他の絶縁樹脂に比べて高いので、この回路フィルムを高温多湿な環境で使用したときに寸法変化を起こし易いということである。これは回路フィルムの誤動作を招く要因にもなり得る。またPIは誘電率も3.5~4.0程度であり格別に小さいとはいえず、使用時に印加される電界条件によってはPIフィルム分極を起こすこともあり得る。
ポリエーテルエーテルケトン樹脂(PEEK)フィルム、ポリフッ化ビニリデン樹脂(PVDF)フィルム、ペルフルオロアルコキシフッ素樹脂(PFA)フィルム、シクロオレフィンポリマー樹脂(COP)フィルム、ポリテトラフルオロエチレン(PTFE)フィルム、ポリエチレンテレフタレート(PET)フィルム、熱可塑性エラストマー(TPE)フィルム、透明機能性樹脂フィルム又は磁性材料を含んだ複合樹脂フィルム、から選ばれるものを用いることが好ましい。
ペルフルオロアルコキシフッ素樹脂フィルム又はシクロオレフィンポリマー樹脂フィルムを基材とする前記可撓性複合フィルムに前記導体回路が形成されてなる前記可撓性回路フィルムは、高速伝送用フレキシブル回路基板、アンテナケーブル用フレキシブル回路基板又は半導体用フレキシブル回路基板に組み込んで使用するのに好適である。
ポリフッ化ビニリデン樹脂フィルムを基材とする前記可撓性複合フィルムに前記導体回路が形成されてなる前記可撓性回路フィルムは、アクチュエーターとして使用するのに好適である。
前記透明機能性樹脂フィルムを基材とする前記可撓性複合フィルムに前記導体回路が形成されてなる前記可撓性回路フィルムは、透明体に設けて使用するのに好適である。透明体として、コンタクトレンズ又は眼鏡のレンズに組み込んで使用するのに好適である。特に、全光線透過率80%以上の透明性の高い機能性樹脂フィルムに前記導体回路が形成されてなる前記可撓性回路フィルムを用いることが好ましい。
フィルムAは、基材である機能性樹脂フィルム1と、その表面を被覆するフラットな導電被膜2とから成る一体構造の複合フィルムになっている。そして導電被膜2は、本実施形態では銅めっき法を適用して製膜された銅めっき被膜である。
このフィルムBは、フィルムAと同一の機能性樹脂フィルム1とその表面に形成された所定パターンの導体回路3とからなる一体構造の回路フィルムになっている。そして導体回路3は、フィルムAの導電被膜(銅めっき被膜)2に例えばフォトリソグラフィーとエッチング技術を適用することにより形成されている。
機能性樹脂フィルム1としては、格別限定されるものではないが、基本的には製造するフィルムAやフィルムBにいかなる機能を発揮させるかという観点から適宜に選定される。
まず、PEEKフィルムは、線膨張係数が前記したPIフィルムに比べるとほぼ2倍程度の値で大きく、引張強度も小さいとはいえ、ガラス転移温度はPIフィルムよりも高く耐熱性に優れている。そして吸水率が小さく高温多湿の環境でも寸法変化を起こしにくい。このようなことから、PEEKフィルムを基材として製造したフィルムA、フィルムBは、集音マイクやスピーカーなど音響機器の振動板の表面などに直接に取り付けて形成する電気回路として用いるのに適した特性を有している。例えば、音響機器のスピーカーでは、従来、振動板を振動させるボイスコイルに電流を流すため、リード線を配線する必要があり、配線スペースが必要になると共に、振動によってリード線の接続部において断線等のおそれもある。しかし、フィルムBによれば、機能性樹脂フィルム1そのものに導体回路3が形成されているため、これを振動板に直接取り付けることで、配線スペースを極めて小さくでき、また、導体回路3が振動板と共に振動するため、配線接続部における断線のおそれも少なくなり、耐久性に優れている。
なお、PETフィルムも耐熱性が高く、また寸法変化を起こしにくいことから、PEEKフィルムと同様に、振動板に取り付けて用いるのに適している。
フィルムAの製造に際しては、基材である機能性樹脂フィルム1の表面に銅めっきを施す。めっきを施す際、本実施形態では、一般的な樹脂めっきで施される物理的な表面粗化処理は行わない。そのため、本実施形態では、銅めっき被膜2との界面に微小凹凸が発生せず、これにより、フィルムBを高周波信号の伝送用に用いた際には、導体回路3の表皮効果が抑制され、信号損失が減少されるという作用、効果を奏することができる。
このめっき過程で、めっき時間を調整することにより、製膜する銅めっき被膜2の膜厚を調整することができる。
このようにして、機能性樹脂フィルム(基材)1の表面が所望する膜厚のフラットな銅めっき被膜2で被覆されたフィルムAが製造される。
具体的には、フィルムAの銅めっき被膜2の表面に、フォトレジストを用いて所定の回路パターンを印刷したのちそのレジストパターンを光硬化させ、ついでエッチング液を用いてフォトレジストが印刷されていない銅めっき被膜2の個所をエッチング除去すればよい。
B 可撓性回路フィルム
1 機能性樹脂フィルム
2 導電被膜(銅めっき被膜)
4 導体回路
Claims (9)
- 機能性樹脂フィルムを基材とし、前記基材の少なくとも一方の表面にめっきから成る導電被膜が形成されていることを特徴とする可撓性複合フィルム。
- 前記機能性樹脂フィルムが、
ポリエーテルエーテルケトン樹脂フィルム、ポリフッ化ビニリデン樹脂フィルム、ペルフルオロアルコキシフッ素樹脂フィルム、シクロオレフィンポリマー樹脂フィルム、ポリテトラフルオロエチレンフィルム、ポリエチレンテレフタレートフィルム、熱可塑性エラストマーフィルム、透明機能性樹脂フィルム又は磁性材料を含んだ複合樹脂フィルム、
から選ばれる請求項1記載の可撓性複合フィルム。 - 請求項1又は2に記載の可撓性複合フィルムの前記導電被膜を加工して成る所定パターンの導体回路が形成されていることを特徴とする可撓性回路フィルム。
- ポリエーテルエーテルケトン樹脂フィルム又はポリエチレンテレフタレートフィルムを基材とする前記可撓性複合フィルムに前記導体回路が形成されてなり、音響機器の振動板に設けられる請求項3記載の可撓性回路フィルム。
- ペルフルオロアルコキシフッ素樹脂フィルム又はシクロオレフィンポリマー樹脂フィルムを基材とする前記可撓性複合フィルムに前記導体回路が形成されてなり、高速伝送用フレキシブル回路基板、アンテナケーブル用フレキシブル回路基板又は半導体用フレキシブル回路基板に組み込まれる請求項3記載の可撓性回路フィルム。
- ポリフッ化ビニリデン樹脂フィルムを基材とする前記可撓性複合フィルムに前記導体回路が形成されてなり、アクチュエーターとして用いられる請求項3記載の可撓性回路フィルム。
- 前記透明機能性樹脂フィルムを基材とする前記可撓性複合フィルムに前記導体回路が形成されてなり、透明体に設けられる請求項3記載の可撓性回路フィルム。
- 前記透明体が、コンタクトレンズ又は眼鏡のレンズである請求項7記載の可撓性回路フィルム。
- 前記透明機能性樹脂フィルムは、全光線透過率80%以上である請求項7又は8記載の可撓性回路フィルム。
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| KR1020207000079A KR20200016327A (ko) | 2017-06-07 | 2018-06-06 | 가요성 복합 필름, 그것을 이용한 가요성 회로 필름 |
| JP2019523930A JP7312419B2 (ja) | 2017-06-07 | 2018-06-06 | 可撓性回路フィルムの製造方法 |
| CN201880037523.XA CN110709239A (zh) | 2017-06-07 | 2018-06-06 | 可挠性复合膜、利用其的可挠性电路膜 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002084013A (ja) * | 2000-09-06 | 2002-03-22 | Honda Motor Co Ltd | 圧電式アクチュエータ |
| JP2010268033A (ja) * | 2009-05-12 | 2010-11-25 | Onkyo Corp | スピーカー振動板およびこれを用いた動電型スピーカー |
| JP2014209730A (ja) * | 2013-03-29 | 2014-11-06 | 富士フイルム株式会社 | スピーカシステム |
| JP2015002125A (ja) * | 2013-06-17 | 2015-01-05 | 独立行政法人産業技術総合研究所 | フレキシブル有機el表示装置及びその製造方法 |
| US20160113760A1 (en) * | 2014-10-24 | 2016-04-28 | Google Inc. | Intra-ocular device |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1240566A (zh) * | 1996-10-21 | 2000-01-05 | 艾利森电话股份有限公司 | 安装电子器件的装置和方法 |
| US7283636B2 (en) * | 2002-02-28 | 2007-10-16 | The Furukawa Electric Co., Ltd. | Planar speaker |
| US20060158865A1 (en) * | 2002-08-23 | 2006-07-20 | Tadahiro Ohmi | Circuit board, electronic device employing circuit board, and mehtod of producing circuit board |
| KR100640694B1 (ko) | 2004-04-27 | 2006-10-31 | 일진소재산업주식회사 | 전자파 차폐용 필터 제조방법 |
| JP4529889B2 (ja) * | 2005-02-10 | 2010-08-25 | セイコーエプソン株式会社 | 圧電振動体、圧電振動体の調整方法、圧電アクチュエータ、時計、電子機器 |
| JP4738308B2 (ja) | 2006-10-11 | 2011-08-03 | 株式会社関東学院大学表面工学研究所 | 金属皮膜付シクロオレフィンポリマー材の製造方法及びその製造方法を用いて得られる金属皮膜付シクロオレフィンポリマー材 |
| JP5163219B2 (ja) | 2008-03-26 | 2013-03-13 | 宇部興産株式会社 | 極薄銅箔積層フィルムの製造方法及び移送方法 |
| JP2009260624A (ja) | 2008-04-16 | 2009-11-05 | Hosiden Corp | スピーカ用振動板 |
| US20110198117A1 (en) | 2008-08-25 | 2011-08-18 | Kanto Gakuin University Surface Engineering Research Institute | Laminate and process for producing the laminate |
| JP4805412B2 (ja) | 2008-09-18 | 2011-11-02 | 古河電気工業株式会社 | 金属張積層体、回路基板及び電子部品 |
| JP5717289B2 (ja) | 2011-06-23 | 2015-05-13 | アキレス株式会社 | 回路用導電フィルム |
| KR101483089B1 (ko) * | 2013-04-24 | 2015-01-19 | 주식회사 이엠텍 | 음향변환장치의 서스펜션 |
| JP2014238268A (ja) | 2013-06-05 | 2014-12-18 | 日本写真印刷株式会社 | 圧力検出装置および入力装置 |
| JP2015002334A (ja) | 2013-06-18 | 2015-01-05 | 出光興産株式会社 | 電子回路基板用積層体 |
| KR20150111877A (ko) * | 2014-03-26 | 2015-10-06 | 제이엑스 닛코 닛세키 킨조쿠 가부시키가이샤 | 수지제의 판상 캐리어와 금속층으로 이루어지는 적층체 |
| CN105169554B (zh) * | 2015-09-14 | 2017-12-15 | 上海交通大学 | 一种视觉假体柔性神经微电极焊盘的制备方法 |
| JP6603554B2 (ja) | 2015-11-13 | 2019-11-06 | 富士フイルム株式会社 | 導電性フィルム |
-
2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002084013A (ja) * | 2000-09-06 | 2002-03-22 | Honda Motor Co Ltd | 圧電式アクチュエータ |
| JP2010268033A (ja) * | 2009-05-12 | 2010-11-25 | Onkyo Corp | スピーカー振動板およびこれを用いた動電型スピーカー |
| JP2014209730A (ja) * | 2013-03-29 | 2014-11-06 | 富士フイルム株式会社 | スピーカシステム |
| JP2015002125A (ja) * | 2013-06-17 | 2015-01-05 | 独立行政法人産業技術総合研究所 | フレキシブル有機el表示装置及びその製造方法 |
| US20160113760A1 (en) * | 2014-10-24 | 2016-04-28 | Google Inc. | Intra-ocular device |
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| KR20200016327A (ko) | 2020-02-14 |
| JP7312419B2 (ja) | 2023-07-21 |
| JPWO2018225760A1 (ja) | 2020-04-09 |
| CN110709239A (zh) | 2020-01-17 |
| KR20250083593A (ko) | 2025-06-10 |
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