JP6982959B2 - Telescopic board modules, stretchable wiring boards and their manufacturing methods - Google Patents

Description

The present invention relates to an external device and an elastic wiring board electrically connected to the external device.
As used herein, the term "external device" means any electronic device that may be electrically connected to an elastic wiring board. The "external device" is, for example, an IC (Integrated Circuit) chip such as an LSI (Large-Scale Integration), a substrate on which an electronic circuit is mounted, an electronic control device including such a substrate, and the like.

In recent years, there has been increasing interest in biosensors and biometric information monitors in the wearable device and medical device markets. For example, in the sports industry, attempts are being made to quantify physical movements with high accuracy in order to further improve the physical ability and skill of athletes. In such a case, a wearable biosensor that detects the movement of the living body may be applied. In the medical industry, attempts are being made to detect vital signs (biological information) such as electrocardiogram, heart rate, blood pressure, and body temperature for the treatment of diseases and measures against pre-illness. Information monitors may be applied. Biosensors and biometric information monitors are generally provided on clothes and orthotic devices, and sensing and monitoring are performed by wearing these clothes and orthotic devices.

However, since the clothes and orthotic devices are slightly displaced from the body due to the movement of the human body, the biosensor and the biometric information monitor provided on the clothes and orthotic devices are displaced from the target part of the living body, and the sensing accuracy and the monitoring accuracy are significantly reduced. There is.

The above problem can be suppressed by directly attaching the biosensor or biometric information monitor to the human body. Therefore, in recent years, a technology called stretchable electronics having a base material having elasticity in the in-plane direction and wiring has been studied, and a wiring board that can expand and contract according to the indirect movement of the human body has been proposed. There is. When a biosensor or biometric information monitor is used for medical purposes, at least the part of the biosensor that comes into contact with the living body or the part that is used near the living body should be disposable from the viewpoint of preventing infectious diseases. Is desired.

As this type of stretchable wiring board, Patent Document 1 describes a circuit board composed of a stretchable base material and a conductive pattern containing conductive fine particles and an elastomer, and the entire board has elasticity. Further, Patent Document 2 describes an elastic wiring board in which an island made of a material having a Young's modulus larger than that of an elastic substrate is formed into a thin film by a printing method and embedded in the substrate. Elements are mounted on the islands, and the islands are connected by elastic wiring. As a result, when the stretchable base material expands and contracts, it is possible to prevent the element from being destroyed and the wiring that straddles the boundary between the island and the base material from being broken.

Japanese Unexamined Patent Publication No. 2014-236103 Japanese Unexamined Patent Publication No. 2014-162124

When embodying a biosensor or biometric information monitor, external devices such as a power supply and control board, which have a large mass and high rigidity, are not mounted on the elastic wiring board so as not to interfere with the movement of the target part of the living body. It is preferable to connect. For this reason, elastic wiring boards are required to have elasticity to follow the movement of the human body while ensuring high reliability of electrical characteristics, and to be easy to handle, for example, when connecting to an external device. There is. On the other hand, in the stretchable wiring boards of Patent Document 1 and Patent Document 2, the handleability has not been studied at all. Furthermore, removing the external device from the stretchable wiring board is not envisioned at all.

The present invention has been made in view of the above-mentioned problems, and provides a stretchable board module, a stretchable wiring board, and a method for manufacturing them, which facilitates connection between an external device and a stretchable wiring board. ..

According to the present invention, the elastic wiring board having the elastic wiring portion and the external connection terminal portion connected to the elastic wiring portion and the elastic wiring board are separate bodies, and the terminal portion is formed on the outer surface of the surface. An external device and a connection relay board inserted between the external connection terminal portion and the external device are provided, and a conductive adhesive is provided on the external connection terminal portion of the elastic wiring board. The external device is detachably attached to the elastic wiring board, and the terminal portion and the external connection terminal portion are electrically and mechanically connected by the conductive adhesive, so that the connection relay board is connected. Is a first region below the front surface that is a surface facing the external device, a second region adjacent to the first region and below the back surface that is a surface facing the external connection terminal portion, and the first region. A base material portion formed over a region and the second region and having a wiring portion for conducting the external connection terminal portion and the external device, and a base material portion formed on the base material portion and provided on the front surface and the back surface. The base material portion and the insulating sheet member include a relay terminal portion connected to the wiring portion and an insulating sheet member having an opening overlapped with the relay terminal portion following the wiring portion. The base material portion is bent so as to be inside the boundary between the first region and the second region, and the conductive pressure-sensitive adhesive is applied to the front surface and the back surface of the connection relay substrate. It is provided on the relay terminal portion, respectively, and electrically and mechanically connects the external connection terminal portion and the external device via the wiring portion and the relay terminal portion. The telescopic board module is provided.

Further, according to the present invention, at least a stretchable base material, a stretchable wiring portion, an external connection terminal portion connected to the stretchable wiring portion, and a conductive pressure-sensitive adhesive provided on the external connection terminal portion. A release sheet for covering the external connection terminal portion provided with the conductive pressure-sensitive adhesive and a connection relay board arranged on the external connection terminal portion are provided , and the connection relay board is provided on the external connection terminal portion. A base material portion provided between a first surface which is a facing surface and a second surface which is a back surface with respect to the first surface and having a wiring portion connected to the external connection terminal portion, the first surface, and the first surface. The base material portion includes a relay terminal portion provided on the second surface and connected to the wiring portion, and an insulating sheet member having an opening portion overlapped with the relay terminal portion following the wiring portion. The insulating sheet member is bent so that the base material portion enters the inside of the boundary between the first surface and the second surface, and the conductive pressure-sensitive adhesive is used on the connection relay board. The first surface and the second surface are provided on the relay terminal portion and on the insulating sheet member, and are provided on the external connection terminal portion with the relay terminal portion interposed therebetween. Elastic wiring boards are provided.

Further, according to the present invention , the elastic wiring including the elastic base material, the elastic wiring portion, the external connection terminal portion connected to the elastic wiring portion, and the conductive adhesive provided on the external connection terminal portion. In a method of manufacturing a telescopic wiring board including a board and a connection relay board inserted between the external connection terminal portion and an external device, the connection relay board is under a surface which is a surface toward the external device. A first region in the above, a second region adjacent to the first region and under the back surface which is a surface toward the external connection terminal portion, and the first region to the second region. A base material portion having a wiring portion for conducting an external connection terminal portion and the external device, a relay terminal portion formed on the base material portion and connected to the wiring portion, and a relay portion following the wiring portion. has an insulating sheet member having an opening to be overlaid with the terminal unit, and a step of manufacturing the connection relay substrate, the step of forming the stretchable wiring portion on a main surface of at least one side of the stretchable substrate When the step of forming the stretchable wiring portion to lead the external connection terminal unit, and a step of disposing the conductive adhesive on the external connection terminal portion, provided on the external connection terminal portion and the a step of covering the conductive adhesive with a release sheet, only including the step of producing the connection relay substrate, a laminating step of bonding the said insulating sheet member and the base portion, of said insulating sheet member The conductive pressure-sensitive adhesive forming step of providing the conductive pressure-sensitive adhesive on the back surface of the surface bonded to the base material portion, and the base material portion and the insulating sheet member bonded in the bonding step are described. A bending step of bending the base material portion so as to be inside the boundary between the first region and the second region is included, and the wiring portion and the relay terminal portion are provided with the conductive pressure-sensitive adhesive. Provided is a method for manufacturing an elastic wiring substrate, which electrically and mechanically connects the external connection terminal portion and the external device.

Further, according to the present invention, an elastic wiring substrate provided with an elastic base material, an elastic wiring portion, an external connection terminal portion connected to the elastic wiring portion, and a conductive adhesive provided on the external connection terminal portion. And an external device which is separate from the elastic wiring board and has a terminal portion formed on the outside of the surface, and a connection relay board inserted between the external connection terminal portion and the external device. In the method of manufacturing the telescopic board module, the connection relay board is a surface facing the external connection terminal portion, which is adjacent to a first region below the surface facing the external device and the first region. A second region underneath, a base material portion formed from the first region to the second region, and a base material portion having a wiring portion for conducting the external connection terminal portion and the external device, and a base material portion. A step of manufacturing the connection relay board having a relay terminal portion formed and connected to the wiring portion, and an insulating sheet member having an opening portion overlapped with the relay terminal portion following the wiring portion. The step of aligning the elastic wiring board and the external device at a position where the external connection terminal portion and the terminal portion face each other, and pressing the external device against the elastic wiring board to press the terminal. It is seen containing a step of electrically and mechanically connecting part between the said external connection terminal portions by said conductive pressure sensitive adhesive, the step of producing the connection relay substrate, said insulating sheet member and the base portion In the bonding step of bonding , a conductive pressure-sensitive adhesive forming step of providing the conductive pressure-sensitive adhesive on the back surface of the insulating sheet member with respect to the surface bonded to the base material portion, and a bonding step. The conductiveness includes a bending step of bending the combined base material portion and the insulating sheet member so that the base material portion is inside with the boundary between the first region and the second region as a boundary. The adhesive provides a method for manufacturing a telescopic board module that electrically and mechanically connects the external connection terminal portion and the external device via the wiring portion and the relay terminal portion.

In the telescopic board module of the present invention, the terminal portion of the external device and the external connection terminal portion thereof are electrically and mechanically connected by the conductive adhesive formed on the external connection terminal portion of the elastic wiring board. This makes it possible to send and receive signals between the external device and the elastic wiring board. At the same time, since the external device is detachably attached to the elastic wiring board, not only is it possible to use the external device repeatedly while replacing the elastic wiring board, but also the elastic wiring board. And an external device can be connected very easily.
In the elastic wiring board of the present invention, a conductive adhesive is provided on the external connection terminal portion, and a release sheet covers such an external connection terminal. Therefore, the user can use the elastic wiring board with an extremely simple operation of exposing the conductive adhesive on the external connection terminal portion by peeling off the release sheet and aligning the terminal portion of the external device on the conductive adhesive. Can be done.
Since the connection relay board of the present invention is detachably attached between the external device and the elastic wiring board, the external device can be attached / detached from the elastic wiring board without directly touching the external device. .. Therefore, it is possible to suppress damage to the external device and use it repeatedly while replacing the elastic wiring board.
Further, according to each manufacturing method of the present invention, the above-mentioned telescopic wiring module, elastic wiring board, and connection relay board can be obtained.

FIG. 3 is a plan view of the telescopic wiring module according to the first embodiment of the present invention as viewed from the upper surface side (upper side of FIG. 2). FIG. 3 is a cross-sectional view taken along the line X1-X1 of FIG. FIG. 3 is a cross-sectional view taken along the line Y1-Y1 of FIG. It is a top view (upper side of FIG. 6) of the elastic wiring board before the external device is attached. It is a top view (upper side of FIG. 6) of the stretchable wiring board excluding the conductive adhesive, the adhesive for strengthening fixation, and the biological gel, as viewed from the top. It is a cross-sectional view taken along the line ZZ of FIG. It is a perspective view which looked at the external device diagonally from the formation surface (lower surface) side of the terminal part. It is a schematic diagram which shows the manufacturing process of the elastic wiring board in 1st Embodiment. It is a schematic diagram which shows the manufacturing process of a telescopic wiring module. It is a top view (upper side of FIG. 6) of the elastic wiring board in the modified example before the external device is attached. FIG. 10 is a sectional view taken along line WW of FIG. FIG. 3 is a plan view of the telescopic wiring module according to the second embodiment of the present invention as viewed from the upper surface side (upper side of FIG. 2). 12 is a cross-sectional view taken along the line X2-X2 of FIG. 12 is a cross-sectional view taken along the line Y2-Y2 of FIG. It is a figure which shows the state which removed the external device from the expansion board module shown in FIG. It is a figure for demonstrating the connection of the telescopic board module, the connection relay board and the stretchable wiring board which concerns on 2nd Embodiment of this invention. FIG. 16 is an exploded perspective view of the connection relay board shown in FIG. It is a figure for demonstrating the process of forming a connection relay board from a wiring board, an insulating cover and a conductive adhesive shown in FIG.

Hereinafter, the first embodiment and the second embodiment of the present invention will be described with reference to the drawings. In each drawing, the corresponding components are designated by a common reference numeral, and duplicate description will be omitted as appropriate.
It should be noted that the "plane" as used herein does not need to be a geometrically perfect plane, but allows the formation of concave portions or convex portions. Further, the term "film" as used herein broadly includes a generally thin shape such as a sheet or a film-like material. That is, the size of the individual thickness is not specified by the difference in the title of the sheet, the film, the film-like material, or the like.

[First Embodiment]
FIG. 1 is a plan view of the telescopic wiring module 100 according to the first embodiment of the present invention viewed from the upper surface side (upper side of FIG. 2), and FIG. 2 is a sectional view taken along line X1-X1 of FIG. 3 is a cross-sectional view taken along the line Y1-Y1 of FIG. First, the outline of the first embodiment will be described. For convenience, the back side of the paper surface of FIG. 1 and the lower side of FIGS. 2 and 3 may be referred to as the lower surface side, and the front side of the paper surface of FIG. 1 and the upper side of FIGS. 2 and 3 may be referred to as the upper surface side. However, this is specified for convenience to explain the relative positional relationship of the components, and does not necessarily coincide with the top and bottom in the direction of gravity.

The telescopic wiring module 100 includes a stretchable wiring board 10 and an external device 40. The elastic wiring board 10 has an elastic wiring portion 14 and an external connection terminal portion 15 connected to the elastic wiring portion 14. In FIG. 3 and the like, for convenience of explanation, a portion in which the external connection terminal portion 15 is laminated on the elastic wiring portion 14 is shown, but the external connection terminal portion 15 is a part of the elastic wiring portion 14. Alternatively, a part of the elastic wiring portion 14 and a conductive coating layer formed on the stretchable wiring portion 14 may be shown. The external device 40 is formed separately from the elastic wiring board 10, and has a terminal portion 42 on the outside of the surface. The terminal portion 42 may be formed on the outside of the surface of the external device 40, may be exposed on the surface of the housing 41 of the external device 40, or may be exposed and formed on the surface of the housing 41 of the external device 40. It may be formed at the tip of) (not shown). A conductive adhesive 22 is provided on the external connection terminal portion 15 of the elastic wiring board 10, the external device 40 is detachably attached to the elastic wiring board 10, and the terminal portion 42 and the external connection terminal portion are attached. 15 is electrically and mechanically connected by a conductive pressure-sensitive adhesive 22.

Here, in the examples of FIGS. 1 to 3, three external connection terminal portions 15 equal to the number of terminal portions 42 of the external device 40 are provided, but the elastic wiring board 10 has one or more external connection terminals. It suffices to have a part 15. Similarly, the external device 40 may have one or more terminal portions 42. Further, the number of the terminal portions 42 and the number of the external connection terminal portions 15 may or may not match. However, when a plurality of terminal portions 42 and external connection terminal portions 15 are present, each terminal portion 42 and each external connection terminal portion are connected so that one external connection terminal portion 15 is connected to one terminal portion 42. Each of the 15 positions is determined. That is, the elastic wiring board 10 may include an external connection terminal portion 15 that matches the number and pitch of the terminal portions 42 of the external device 40.

Further, for the detachable attachment of the external device 40 to the elastic wiring board 10, other means such as the fixing and strengthening adhesive 24 exemplified in FIGS. 2 and 3 (with a structure like a locking portion). It may be present), or it may be realized only by the conductive pressure-sensitive adhesive 22.
Here, the "detachable attachment" of the external device 40 to the elastic wiring board 10 means that the external device 40 can be removed from the elastic wiring board 10 to the extent that it can be reused after the attachment.

The conductive adhesive 22 mechanically connects between the terminal portion 42 and the external connection terminal portion 15 with conductivity (electrical conductivity) capable of conducting conduction between the terminal portion 42 and the external connection terminal portion 15. Has stickiness to obtain. Here, "mechanically connecting" means not only a configuration in which the conductive adhesive 22 is located between the terminal portion 42 and the external connection terminal portion 15 to directly connect the two, but also an external connection with the terminal portion 42. It also includes connecting to and from the terminal portion 15 via another member such as wiring. The adhesiveness of the conductive adhesive 22 means the adhesiveness to which the terminal portion 42 and the external connection terminal portion 15 can be connected again after the terminal portion 42 and the external connection terminal portion 15 are separated. That is, while having a fixed strength that can minimize the noise mixed in the signal between the terminal portion 42 and the external connection terminal portion 15 at the time of connection, at least the terminals when the terminal portion 42 and the external connection terminal portion 15 are peeled off. It is desirable that the terminal portion 42 has a characteristic that the terminal portion 42 is not damaged even if the residue remaining on the surface after peeling is removed without damaging the portion 42. For example, the conductive pressure-sensitive adhesive 22 is formed by kneading a pressure-sensitive adhesive resin such as an acrylic polymer or a urethane-based resin with a conductive filler such as a metal filler or a carbon filler.

In the telescopic wiring module 100 configured as described above, the stretchable wiring board 10 and the external device 40 can be connected extremely easily. In addition, since the external device 40 and the elastic wiring board 10 are detachably connected to each other, the elastic wiring board 10 is disposable, and the elastic wiring module 100 is repeatedly used while replacing the elastic wiring board 10. Is possible. Further, the external device 40 and the elastic wiring board 10 can exchange low noise signals by connecting the terminal portion 42 and the external connection terminal portion 15 via the conductive adhesive 22.

Hereinafter, the telescopic wiring module 100 according to the first embodiment will be described in more detail.
As illustrated in FIG. 1 and the like, the telescopic wiring module 100 according to the first embodiment can be used as a bio-attachable telescopic wiring (board) module. In this usage mode, the stretchable wiring board 10 flexibly follows the movement of the body surface of the living body due to its stretchability. Further, the external device 40 attached to the elastic wiring board 10 is an electronic device that is electrically connected to the external connection terminal portion 15 of the elastic wiring board 10 via the terminal portion 42, and is from the elastic wiring board 10. A biological signal can be acquired or a current can be applied to the biological side.
The usage form of the telescopic wiring module 100 is not limited to such a biological attachment type. For example, the telescopic wiring module 100 may be attached to a robot, various devices, devices, and wearable products. In addition, in order to make the explanation easy to understand, in the following explanation, the case where it is used by being attached to a living body is exemplified. Further, the function of the external device 40 is not limited as long as it is an electronic device electrically connected to the elastic wiring board 10.

<Elastic wiring board>
FIG. 4 is a plan view of the elastic wiring board 10 before the external device 40 is attached as viewed from the upper surface side (upper side of FIG. 6), and FIG. 5 shows the conductive adhesive 22 and the fixing reinforcing adhesive. 24 is a plan view of the stretchable wiring board 10 excluding the biological gel 26 as viewed from the upper surface side (upper side of FIG. 6), and FIG. 6 is a sectional view taken along line ZZ of FIG. For convenience, the back side of the paper surface of FIGS. 4 and 5 and the lower side of FIG. 6 may be referred to as the lower surface side, and the front side of the paper surface of FIGS. 4 and 5 and the upper side of FIG. 6 may be referred to as the upper surface side. However, this is specified for convenience in order to explain the relative positional relationship of the components, and does not necessarily coincide with the top and bottom in the direction of gravity. Further, in FIG. 4, the conductive pressure-sensitive adhesive 22, the fixing-strengthening pressure-sensitive adhesive 24, and the biological gel 26 are shown by diagonal lines for convenience.

The elastic wiring board 10 has a first elastic base material 11, a second elastic base material 12, an elastic wiring portion 14, an external connection terminal portion 15, an electrode portion 16, and a guide portion 18. Hereinafter, the first elastic base material 11 and the second elastic base material 12 are abbreviated as the elastic base material 11 and the elastic base material 12.

The elastic wiring board 10 in the first embodiment has a multilayer structure in which elastic base materials 11 and 12 are laminated. The elastic base materials 11 and 12 are sheet-like members that can expand and contract in at least one direction in the in-plane direction. Desirably, the stretchable base materials 11 and 12 can be stretched in two in-plane directions. The in-plane stretchability of the stretchable base materials 11 and 12 may be isotropic, or the stretchability in a plurality of in-plane directions may be anisotropic from each other.
Preferred materials constituting the stretchable base materials 11 and 12 include, but are not limited to, elastomeric materials such as nitrile rubber, latex rubber, urethane-based elastomer, and silicone-based elastomer. In particular, by using a urethane-based elastomer sheet used for medical purposes, high safety can be obtained even when it is attached to the skin of a human body.
The thicknesses of the elastic base materials 11 and 12 are not particularly limited, but from the viewpoint of not hindering the expansion and contraction movement of the object (target surface) (for example, the surface of the living body) to which the elastic wiring board 10 is applied, for example, the thickness. Is preferably 100 μm or less. The thickness of the elastic base materials 11 and 12 is more preferably 25 μm or less, and further preferably 10 μm or less.
However, the elastic wiring board 10 is not a multi-layer structure of the elastic base material 11 and the elastic base material 12, and is elastic with a single-layer elastic base material in a form in which the electrode portion 16 is not exposed in the biological surface direction. It may be formed from the protective layer of.

The stretchable wiring portion 14 is a stretchable conductive pattern in which a pattern is formed on one side or both sides of the stretchable base materials 11 and 12. The stretchable wiring portion 14 of the first embodiment is formed on the facing surfaces of the stretchable base materials 11 and 12. Specifically, the elastic wiring portion 14 is formed on the upper surface of the elastic base material 12 and is connected to the external connection terminal portion 15, and the elastic wiring portion 14a is formed on the lower surface of the elastic base material 11 and is formed on the electrode portion 16. It is composed of an elastic wiring portion 14b to be connected. The elastic wiring portions 14a and 14b are joined to each other at their ends and are conductive. It is preferable that the ends of the elastic wiring portions 14a and 14b are fused and integrated. The pattern shape of the elastic wiring portion 14 is not particularly limited. The elastic wiring portion 14 of the first embodiment shows three line shapes.

The elastic wiring portion 14 is configured to include a conductive material and has conductivity. As the conductive material, a material having good conductivity such as silver, gold, platinum, carbon, copper, aluminum, cobalt or nickel, or an alloy thereof can be selected. The shape of the conductive material is not particularly limited, but may be in the form of particles such as granules or powder. The particle shape is not particularly limited, and may be spherical, needle-shaped, flake-shaped, nanowire-shaped, or the like. The aspect ratio of the particles can be, for example, 1 or more and 100 or less, particularly 1 or more and 50 or less. Here, the aspect ratio means the ratio of the longest dimension to the shortest dimension of the three-dimensional body. By setting the aspect ratio of the particles constituting the elastic wiring portion 14 to 5 or more and 20 or less, the resistance when the elastic wiring board 10 extends in the in-plane direction and the elastic wiring portion 14 is deformed in the length direction. Changes can be suppressed low.

It is preferable that the elastic wiring portion 14 further includes a resin binder. That is, the elastic wiring portion 14 of the first embodiment is formed of a conductive material in which conductive particles are dispersed and blended in a resin material. Since the elastic wiring portion 14 contains the resin binder, it is possible to prevent the elastic wiring portion 14 from being broken due to the expansion and contraction of the elastic wiring board 10. Examples of the resin binder include, but are not limited to, a binder containing a resin such as urethane or polyester as a main component, and a thermoplastic elastomer material such as silicone rubber. The resin binder has a low Young's modulus so that the elastic modulus of the elastic wiring portion 14 in the coated state is equal to or smaller than the elastic modulus of the elastic substrates 11 and 12. It is desirable to select. The elastomer material may be used alone, or a plurality of types of elastomer materials may be mixed and used.

The method of forming the elastic wiring portion 14 is not particularly limited, but it can be formed by, for example, a printing method. That is, the elastic wiring portions 14a and 14b are print patterns formed by printing and applying an elastic conductive paste to the elastic base material 11 or 12. The specific printing method is not particularly limited, and examples thereof include a screen printing method, an inkjet printing method, a gravure printing method, and an offset printing method. Of these, screen printing is preferably used from the viewpoint of fine resolution and thick film stability. When the elastic wiring portion 14 is formed by the printing method, it is preferable to prepare a conductive paste containing the above-mentioned conductive particles, a resin binder and an organic solvent and use it in the printing method. By using an elastic conductive paste containing metal particles such as silver as a main component in the elastic wiring portion 14, for example, an elongation rate of about 50% or more and 70% or less can be realized, and excellent elongation characteristics are achieved. It is possible to form wiring.

By heat-pressing the elastic base material 11 and the elastic base material 12 in a state where the ends of the elastic wiring portions 14a and 14b are overlapped with each other, these wirings and the base materials are respectively subjected to the same process. Can be integrated. That is, in the first embodiment, the facing surfaces of the elastic base material 11 and the elastic base material 12 are directly joined to each other, and the ends of the elastic wiring portion 14a and the elastic wiring portion 14b are fused and integrated. do. The elastic wiring portion 14 is formed in an embedded state between the elastic base material 11 and the elastic base material 12.
In the first embodiment, it is desirable that the elastic wiring portions 14a and 14b are both formed by printing and applying a conductive paste containing a thermoplastic resin binder. As a result, both the elastic wiring portions 14a and 14b have fusion resistance, so that the resin binder and the conductive particles are fused and integrated at both joints, and the generation of interfacial resistance at the joints is suppressed. can do. However, a thermosetting resin may be used as the resin binder for either one of the elastic wiring portions 14a and 14b. In this case, the elastic wiring portions 14a and 14b can be joined due to the fusion property of one of them.

The thickness and width dimensions of the stretchable wiring section 14 include the resistivity of the stretchable wiring section 14 when no load is applied, the resistivity change of the stretchable base materials 11 and 12 when stretched, and the entire stretchable wiring board 10. It can be determined based on the constraints of thickness and width dimensions. From the viewpoint of ensuring good elasticity by following the dimensional changes of the elastic base materials 11 and 12 at the time of stretching, the width dimension of the elastic wiring portion 14 is preferably 1000 μm or less, preferably 500 μm or less. It is more preferably present, and further preferably 200 μm or less. The thickness dimension of each wiring constituting the elastic wiring portion 14 can be 25 μm or less. It is preferably 10 μm or more and 15 μm or less.

The elastic wiring portion 14 is connected to the electrode portion 16 at one end and is connected to the external connection terminal portion 15 at the other end. In the first embodiment, the end portion of the elastic wiring portion 14b opposite to the joint end portion with the elastic wiring portion 14a is formed as the electrode portion 16.

The electrode portion 16 is a conductive pattern formed on one side (lower surface) of the elastic base material 11. The electrode portion 16 of the first embodiment is formed in a substantially rectangular shape on the lower surface of the elastic base material 11, and is used as a sensor electrode for measuring a bioelectric potential or the like. However, the number and shape of the electrode portions 16 are not limited to the number and shape shown in the figure. Further, each electrode portion 16 may be formed from a plurality of electrodes and used as a proximity sensor or a touch sensor.
The electrode portion 16 may have elasticity like the elastic wiring portion 14, or may have higher in-plane rigidity than the elastic wiring portion 14 and may not have substantially elasticity. However, it is preferable that the electrode portion 16 is made of the same conductive material as the elastic wiring portion 14 and is printed and formed by the same process as the elastic wiring portion 14. As a result, excellent elongation characteristics can be obtained even in the electrode portion 16, and the stretchable wiring board 10 can be obtained with a small number of steps.

The external connection terminal portion 15 is a terminal provided on one side of the elastic wiring board 10 for electrically connecting to the external device 40. The external connection terminal portion 15 is preferably formed of a resin material so as to have high adhesion strength with the conductive pressure-sensitive adhesive 22. In the first embodiment, the external connection terminal portion 15 is composed of an end portion of the elastic wiring portion 14a and a conductive coating film arbitrarily laminated and formed, and is positioned so as to overlap the opening 17 of the elastic base material 11. Is located in. In FIG. 3 and the like, for convenience of explanation, a portion in which the external connection terminal portion 15 is laminated on the elastic wiring portion 14 is shown, but the external connection terminal portion 15 is a part of the elastic wiring portion 14. Alternatively, a part of the elastic wiring portion 14 and a conductive coating layer formed on the stretchable wiring portion 14 may be shown.
When the external connection terminal portion 15 contains a conductive film, the external connection terminal portion 15 is generated by laminating a conductive film such as carbon paste on the end portion of the stretchable wiring portion 14 formed by printing. can do. Since carbon paste uses non-metallic carbon as conductive particles, it can be expected to suppress ion migration. Unlike the above, when the conductive coating is not included, the external connection terminal portion 15 is formed by using the above-mentioned conductive paste or carbon paste to shape the end portion of the elastic wiring portion 14 into a specific shape. May be good.

Further, in the elastic wiring board 10 of the first embodiment, as shown in FIG. 4, a conductive adhesive 22 is provided on each external connection terminal portion 15.
Specifically, the conductive pressure-sensitive adhesive 22 is provided with substantially the same dimensions as the external connection terminal portion 15 and in a state of being separated from each other. The size of each conductive pressure-sensitive adhesive 22 is preferably equal to or less than the size of the external connection terminal portion 15. For example, each conductive pressure-sensitive adhesive 22 has a circular shape having a diameter of 1 mm or more and 5 mm or less, or a length of at least one side. Are formed in a rectangular shape of 1 mm or more and 5 mm or less, respectively. By providing a margin in the shape and dimensions of the conductive adhesive 22 in this way, the accuracy of alignment between the elastic wiring board 10 and the external device 40 can be relaxed. As a result, even if the mounting position is slightly displaced, the electrical connection between the elastic wiring board 10 and the external device 40 can be prevented from being hindered.
The material properties of the conductive pressure-sensitive adhesive 22 are as described above.

The guide portion 18 presents the mounting position of the external device 40 above the upper surface of the stretchable base material 11 (stretchable wiring board 10). In other words, the guide portion 18 is provided in the vicinity of the mounting position of the external device 40 on the elastic base material 11. As illustrated in FIGS. 1, 4 and the like, the guide portion 18 of the first embodiment is erected so as to protrude from the upper surface of the elastic base material 11. The guide portion 18 is arranged around the attachment position of the external device 40 in a plurality of strips in a plan view. As a result, the user simply aligns the external device 40 according to the guide portion 18 and attaches (pastes) it to the elastic wiring board 10, and the external connection terminal portion 15 of the elastic wiring board 10 and the terminal portion of the external device 40. The telescopic wiring module 100 can be used by electrically and mechanically connecting the 42. As described above, according to the guide portion 18, the preparation for use of the telescopic wiring module 100 becomes extremely easy.

The guide portion 18 may have elasticity like the elastic base materials 11 and 12, or may have higher rigidity than the elastic base materials 11 and 12 and may not have substantially elasticity. , The material is arbitrary. For example, the guide portion 18 is formed of the same elastic material as the elastic base materials 11 and 12. Further, the guide portion 18 may be formed of the same material as the external connection terminal portion 15. According to this, since the external connection terminal portion 15 and the guide portion 18 can be formed in the same process, there is an advantage that the positional accuracy of each other can be improved to a high level.

The embodiment of the guide unit 18 is not limited to the above example. For example, the guide portion 18 may be formed at a position and shape pointing to at least one side or two or more points on the outer circumference of the external device 40 in a plan view. Further, the guide portion 18 may be formed as a mark for aligning with one or more marks provided on the surface of the housing 41 of the external device 40. Specifically, the guide portion 18 may be formed as a similar arrow mark so that the arrow mark provided on the external device 40 can be aligned with the arrow mark. The guide portion 18 may be printed on the upper surface or the lower surface of the elastic base material 11 so as to be visible from above the upper surface of the elastic base material 11.

Further, in the stretchable wiring board 10 of the first embodiment, the adhesive for fixing and strengthening is applied to at least a part of the main surface (upper surface) of the stretchable base material 11 (stretchable wiring board 10) facing the external device 40. 24 is provided. Specifically, the fixing reinforcing pressure-sensitive adhesive 24 is provided in a region on the upper surface of the stretchable base material 11 that can be bonded to the external device 40 and does not overlap with the conductive pressure-sensitive adhesive 22. In the first embodiment, the fixing reinforcing pressure-sensitive adhesive 24 is provided in a region of the inner region surrounded by the guide portion 18 that is separated from the conductive pressure-sensitive adhesive 22.
As a result, the elastic wiring board 10 and the external device 40 are firmly supported and fixed by the fixing reinforcing adhesive 24, so that even if the person to which the elastic wiring module 100 is attached moves, it does not fall off and expands and contracts. The function of the wiring module 100 can be maintained.

The fixing reinforcing adhesive 24 is provided to firmly fix the external device 40 to the elastic wiring board 10. Therefore, the fixing reinforcing adhesive 24 does not need to be conductive, but needs to have enough adhesiveness to allow the external device 40 and the elastic wiring board 10 to be attached and detached. Regarding the adhesiveness of the fixing reinforcing adhesive 24, similarly to the adhesiveness of the conductive adhesive 22, after the external device 40 is removed from the elastic wiring board 10, the external device 40 is again attached to the elastic wiring board 10. It means that it is sticky enough to be attached to.
It is preferable that the adhesive force of the fixing reinforcing adhesive 24 is stronger than the adhesive force of the conductive adhesive 22. For example, when the fixing reinforcing adhesive 24 is formed of the same adhesive material as the conductive adhesive 22, the adhesive strength of the fixing reinforcing adhesive 24 may inevitably be stronger than that of the conductive adhesive 22. There is. This is because the conductive pressure-sensitive adhesive 22 contains a conductive material, so that the ratio of the pressure-sensitive adhesive material is low.
Further, the fixing reinforcing pressure-sensitive adhesive 24 may be made of the same material as the conductive pressure-sensitive adhesive 22 and may be formed in the same manufacturing process as the conductive pressure-sensitive adhesive 22. By doing so, the manufacturing process can be shortened. However, since it has conductivity, the fixing reinforcing adhesive 24 is provided at a position completely separated from the conductive adhesive 22 and the external connection terminal portion 15 without being bonded to the elastic wiring portion 14. Need to be.
However, if the fixing reinforcing adhesive 24 can be patterned into an arbitrary shape by means such as a printing method, it may be formed so as to be in contact with the outer periphery excluding the region where the conductive adhesive 22 is formed. ..

It is desirable that the adhesive strength of the fixing reinforcing adhesive 24 is higher with respect to the elastic base material 11 (stretchable wiring board 10) than with respect to the external device 40. Similarly, it is desirable that the degree of adhesion of the conductive adhesive 22 is higher with respect to the external connection terminal portion 15 than with respect to the terminal portion 42 of the external device 40. The adhesion strength here is an index showing the degree of the strength of the force when peeling off per unit area.
The adhesion strength of the fixing and strengthening adhesive 24 is as described above by drying or curing the stretchable base material 11 in a state where the fixing and strengthening adhesive 24 is applied in the manufacturing process to which the external device 40 is not connected. can do. Similarly, regarding the adhesion strength of the conductive adhesive 22 as described above, by drying or curing the conductive adhesive 22 in a state of being applied to the external connection terminal portion 15 in the manufacturing process to which the external device 40 is not connected. Can be done. In other words, due to such a manufacturing process, the smoothness of the interface on the external device 40 side in each adhesive is lower than the smoothness on the elastic wiring board 10 side (the roughness becomes higher), and thus as described above. It can also be said that the relationship of adhesion strength can be realized.
Further, the above relationship of the degree of adhesion of each pressure-sensitive adhesive can also be realized in terms of material affinity. That is, when the terminal portion 42 of the external device 40 is plated with gold or the like, the external connection terminal portion 15 is formed by including a resin material such as an elastomer, so that the conductive pressure-sensitive adhesive 22 containing the resin material and the outside are formed. It is possible to increase the affinity with the connection terminal portion 15 and realize the relationship of the degree of adhesion.
In the telescopic wiring module 100 of the first embodiment, it is premised that the external device 40 is detachably attached to the elastic wiring board 10, that is, can be removed from the elastic wiring board 10 after attachment. Under this premise, according to the degree of adhesion as described above, the conductive adhesive 22 and the fixing reinforcing adhesive 24 remain on the elastic wiring board 10 side rather than the external device 40 side after removal. It can be made easier. As a result, cleaning of the terminal portion 42 of the external device 40 can be unnecessary or reduced, damage to the terminal portion 42 can be reduced, and the reuse of the external device 40 can be facilitated. The number of uses can be increased.

An alcohol-soluble base material such as ethanol, methanol, or propanol is used as the pressure-sensitive adhesive contained in the conductive pressure-sensitive adhesive 22 in case the conductive pressure-sensitive adhesive 22 remains on the terminal portion 42 of the external device 40. Is preferable. Thereby, by wiping the terminal portion 42 with the alcohol preparation after removal, the residual conductive adhesive 22 can be easily removed from the terminal portion 42 without damaging the terminal portion 42.
As the fixing and strengthening pressure-sensitive adhesive 24, the same pressure-sensitive adhesive as the conductive pressure-sensitive adhesive 22 may be used, or other pressure-sensitive adhesives may be used. In order to maintain the conductive state between the terminal portion 42 and the external connection terminal portion 15, it is desirable that the conductive adhesive 22 remaining on the terminal portion 42 is completely removed. However, the conductive adhesive 22 remaining in the housing 41 of the external device 40 other than the terminal portion 42 remains to the extent that it does not hinder the fixing of the external device 40 and the new elastic wiring board 10 at the time of reuse. It may remain.

Similar to the conductive pressure-sensitive adhesive 22, the fixing-strengthening pressure-sensitive adhesive 24 is patterned by printing, dispensing, or the like. For example, by setting the individual thickness to 100 μm or less, good patterning becomes possible.

Since the telescopic wiring module 100 of the first embodiment is attached to a living body such as a human or an animal, a living body gel 26 is provided on the surface of the electrode portion 16. The biological gel 26 may be an existing one as long as it can secure continuity between the living body and the electrode portion 16. For example, as the biological gel 26, a so-called hydrogel that retains water can be used.
Since the elastic wiring board 10 in the first embodiment is a multi-channel type biosensor having three electrode portions 16, as shown in FIG. 4, the individual biogels 26 have the space between the individual electrode portions 16. It is provided so as to be separated from each other so as not to cause a short circuit.
Further, in order to increase the adhesive strength between the elastic wiring board 10 and the living body, a biological gel for fixing (shown) is provided on the main surface (lower surface) of the elastic base material 12 facing the living body, separately from the biological gel 26. It is preferable that (1) is provided. In this case, the biological gel for fixation is provided in substantially the entire area or at least a part thereof in the region separated from the individual electrode portions 16 on the lower surface of the elastic base material 12.

Before the external device 40 is attached to the elastic wiring board 10 and used as the elastic wiring module 100, the elastic wiring board 10 in the first embodiment is provided with at least an external conductive adhesive 22. A release sheet (for example, see reference numeral 30 in FIG. 8) may be provided to cover the connection terminal portion 15. Thereby, the conductive adhesive 22 can be protected until the external device 40 is attached to the elastic wiring board 10. After peeling off the release sheet from the elastic wiring board 10, the user may connect the external connection terminal portion 15 and the terminal portion 42 of the external device 40 via the conductive adhesive 22.
When the elastic wiring board 10 is provided with the fixing and reinforcing adhesive 24 in advance, the release sheet covers the region of the elastic base material 11 where the fixing and reinforcing adhesive 24 is provided. It is preferable to be provided.

The release sheet is formed of a general paper or resin film. For example, a release layer laminated with a resin such as polyethylene or silicone may be provided on the surface of the release sheet in contact with the conductive pressure-sensitive adhesive 22 and the fixing-strengthening pressure-sensitive adhesive 24 in order to ensure ease of peeling. .. When the release sheet is made of a resin film, for example, polyethylene terephthalate (PET), polyester or the like is used as the material of the film. The thickness and shape of the release sheet are arbitrary. The release sheet may be a single sheet that covers the external connection terminal portion 15 provided with the conductive adhesive 22 and the fixing reinforcing adhesive 24, or may be a plurality of sheets.

In the elastic wiring board 10 before the external device 40 is attached, the height of the fixing reinforcing adhesive 24 from the upper surface of the elastic base material 11 is lower than the height of the conductive adhesive 22 from the upper surface thereof. Is preferable. As a result, the elastic wiring board 10 and the external device 40 can be more firmly connected to each other by the force of the adhesive for fixing reinforcement 24 between the terminal portion 42 and the external connection terminal portion 15. ..
Further, it is desirable that the guide portion 18 is also provided on the stretchable wiring board 10 in advance before it is used. As a result, the external device 40 can be easily attached to the elastic wiring board 10. When the guide portion 18 has a convex shape, the height of the guide portion 18 from the upper surface of the elastic base material 11 is higher than the height of the conductive adhesive 22 and the fixing reinforcing adhesive 24 from the upper surface thereof. Is also preferably low.

<External device>
FIG. 7 is a perspective view of the external device 40 viewed obliquely from the formation surface (lower surface) side of the terminal portion 42. As shown in FIG. 7, the external device 40 has a housing 41 and a terminal portion 42.
The terminal portion 42 is a terminal provided on the outside of the surface (lower surface) facing the elastic wiring board 10 in the housing 41 of the external device 40 in order to electrically connect to the elastic wiring board 10. In the example of FIG. 7, three terminal portions 42 are provided, but the number of terminal portions 42 is not limited. The number of terminal portions 42 may be equal to or different from the number of external connection terminal portions 15 of the elastic wiring board 10.
The terminal portion 42 may be made of the same material as the terminal electrode of a general electric device. For example, the terminal portion 42 is formed by plating the terminal surface with gold or tin. The shape and material of the terminal portion 42 are not particularly limited as long as they can be connected to the external connection terminal portion 15 of the elastic wiring board 10. However, in order to improve the reusability of the external device 40, it is desirable that the terminal portion 42 is made of a highly durable material and processed.

The shape and material of the housing 41 are also not particularly limited. However, it is preferable that the surface (lower surface) of the housing 41 facing the elastic wiring board 10 is formed in a concave shape. When the telescopic wiring module 100 in the first embodiment is attached to the surface of the living body, the stretchable wiring board 10 can follow the convex curved surface of the living body due to its elasticity. Since the lower surface of the housing 41 has a concave shape, it approximates the shape of the stretchable wiring board 10 that follows the convex shape, so that the wearing feeling and discomfort of the stretchable wiring module 100 can be reduced, and the stretchability can be reduced. It is possible to improve the connectivity between the external connection terminal portion 15 of the wiring board 10 and the terminal portion 42 of the external device 40.
When the terminal portion 42 is provided at a position protruding outward from the surface of the housing 41, the surface of each terminal portion 42 or a point in the surface (for example, a center point) is provided regardless of the shape of the lower surface of the housing 41. ) May be located in a concave shape, and each terminal portion 42 may be provided.
The concave shape is set to, for example, a curvature corresponding to the biological curved surface of the place where the elastic wiring board 10 is attached. When the stretchable wiring board 10 is formed in an elongated shape in order to improve the followability to a biological curved surface, the curvature has a radius of curvature larger than, for example, the short sides (upper and lower sides of FIG. 1) of the stretchable wiring board 10. Set to a large curvature.

<Production method>
Next, a method of manufacturing the elastic wiring board 10 and the elastic wiring module 100 of the first embodiment (hereinafter, both may be referred to as this method) will be described.

FIG. 8 is a schematic view showing a manufacturing process of the elastic wiring board 10 in the first embodiment.
The method for manufacturing the elastic wiring substrate 10 includes a step of forming the elastic wiring portion 14a or 14b on the main surface of at least one side of the elastic base material 11 or 12 (wiring formation process) and the elastic wiring portion 14a or 14b. A step of forming the external connection terminal portion 15 connected to the external connection terminal portion 15 (terminal formation process), a step of disposing the conductive adhesive 22 on the external connection terminal portion 15 (adhesive agent arrangement process), and an external connection terminal portion 15. It includes at least a step (sheet process) of covering the conductive pressure-sensitive adhesive 22 formed in the above with a release sheet 30. The timing of each step is arbitrary.

Next, this method will be described in detail.
In the wiring forming step, elastic base materials 11 and 12 are prepared, and a conductive paste is applied to each main surface by a printing method to form elastic wiring portions 14a and 14b. In the first embodiment, the elastic wiring portion 14b is formed by applying the conductive paste to the lower surface of the elastic base material 11, and the conductive paste is applied to the upper surface of the elastic base material 12. As a result, the elastic wiring portion 14a is formed. In order to improve the handleability of the elastic base materials 11 and 12, the upper surface of the elastic base material 11 and the lower surface of the elastic base material 12 are coated with a separator (not shown) made of a paper material or the like. In this state, the wiring forming step may be carried out.

Next, a step of joining the stretchable base material 11 and the stretchable base material 12 is carried out.
In this joining step, first, the main surface (lower surface) on which the elastic wiring portion 14b of the elastic base material 11 is formed and the main surface (upper surface) on which the elastic wiring portion 14a of the elastic base material 12 is formed are formed. The elastic base material 11 and the elastic base material 12 are aligned so as to face each other. At this time, the position of the opening 17 of the elastic base material 11 and the position of the external connection terminal portion 15 or the position of the tip portion of the elastic wiring portion 14a (the portion where the external connection terminal portion 15 is formed) are matched. Similarly, the position of the opening 19 of the elastic base material 12 and the position of the electrode portion 16 are matched.

Subsequently, the elastic base material 11 and the elastic base material 12 are heated or pressurized to directly join the facing surfaces of the elastic base material 11 and the elastic base material 12, and the elastic wiring portions 14a and 14b are directly joined. Some parts are fused and integrated. At this time, the elastic base material 11 and the elastic base material 12 are further directly bonded due to the adhesiveness of the elastomer material. More specifically, the elastic base material 11 and the elastic base material 12 are joined by heating and pressurizing them to fuse them together. As the heating means, a laminating method using a heating roll or a heating press means can be adopted. The pressure press may be performed in the atmosphere or in vacuum. As a result, the elastic base material 11 and the elastic base material 12 are mechanically bonded by mutual heat fusion properties, and the elastic wiring portions 14a and 14b are also mechanically and electrically connected by mutual heat fusion properties. Is connected. Therefore, the elastic wiring portions 14a and 14b and the elastic base materials 11 and 12, respectively, can be directly connected without using an adhesive or an adhesive. As a result, the connection work is completed extremely easily.

In the terminal forming process, the external connection terminal portion 15 may be formed by arbitrarily laminating a conductive film on the tip portion of the elastic wiring portion 14a by a method such as printing of carbon paste. In the first embodiment, since the elastic wiring portions 14a and 14b are fused and integrated in the subsequent process, the external connection terminal portion 15 is electrically connected to the elastic wiring portions 14a and 14b.
When the external connection terminal portion 15 includes the conductive film, the guide portion 18 may be formed in the same step as the terminal forming step. In this case, the guide portion 18 is made of the same material as the conductive coating of the external connection terminal portion 15. As a result, the position accuracy of each other can be raised to a high level. However, the conductive coating of the guide portion 18 and the external connection terminal portion 15 may be formed in a separate process. For example, the guide portion 18 may be formed before the above-mentioned joining step, or may be separately formed before or after the formation of the conductive coating film of the external connection terminal portion 15.
Further, the terminal forming process may be executed after the joining step or before the joining step.

After that, the pressure-sensitive adhesive disposing step is executed.
In the first embodiment, in this step, the conductive adhesive 22 is applied to the external connection terminal portion 15 through the opening 17 of the elastic base material 11 and dried in a state of being raised above the upper surface of the elastic base material 11. , Hardened and formed. Similarly, the fixing and strengthening pressure-sensitive adhesive 24 is applied to a region on the upper surface of the stretchable base material 11 separated from the conductive pressure-sensitive adhesive 22 and dried and cured. In this way, by applying each adhesive and then drying or curing it, the adhesion strength of the fixing strengthening adhesive 24 is increased to the elastic base material 11 (elastic wiring board 10) more than to the external device 40. On the other hand, it can be made higher. Similarly, the degree of adhesion of the conductive adhesive 22 can be made higher with respect to the external connection terminal portion 15 than with respect to the terminal portion 42 of the external device 40.
Further, in order to improve the connectivity between the terminal portion 42 of the external device 40 and the external connection terminal portion 15, the height of the fixing reinforcing adhesive 24 from the upper surface of the elastic base material 11 is set to the conductive adhesive 22. It is preferably formed in a state lower than the height from its upper surface.
Further, when the conductive pressure-sensitive adhesive 22 and the fixing-strengthening pressure-sensitive adhesive 24 are formed of the same material, the conductive pressure-sensitive adhesive 22 and the fixing-strengthening pressure-sensitive adhesive 24 can be formed by the same process. This makes it possible to simplify the manufacturing process.

Subsequently, the sheet process is executed. In this step, the release sheet 30 is arranged on the upper surface of the elastic base material 11 so as to cover the conductive pressure-sensitive adhesive 22 and the fixing-strengthening pressure-sensitive adhesive 24. In the first embodiment, the release sheet 30 is attached so as to cover substantially the entire upper surface of the elastic base material 11.
Further, although not shown, a release sheet may be arranged on the lower surface of the elastic base material 12. In this case, the release sheet may be attached with the biological gel 26 provided on the electrode portion 16, or may be attached without the biological gel 26 provided.

FIG. 9 is a schematic diagram showing a manufacturing process of the telescopic wiring module 100.
In the manufacturing process of the telescopic wiring module 100, the stretchable wiring board 10 manufactured in the above-mentioned process and the external device 40 separate from the stretchable wiring board 10 are prepared, and the alignment step and the connection process are performed. Is at least executed.
In the alignment step, the elastic wiring board 10 and the external device 40 are aligned at positions where the external connection terminal portion 15 and the terminal portion 42 face each other. At this time, the elastic wiring board 10 may or may not be already attached to an adherend surface such as a living body.

Subsequently, in the connection process, the external device 40 is pressed against the elastic wiring board 10, and the terminal portion 42 and the external connection terminal portion 15 are electrically and mechanically connected by the conductive adhesive 22. In the first embodiment, since the fixing and strengthening adhesive 24 is provided in the region on the upper surface of the elastic base material 11 that can be bonded to the external device 40, the fixing and strengthening to the housing 41 of the external device 40 is performed by this step. The adhesive 24 comes into contact with the external device 40, and the external device 40 and the elastic wiring board 10 are more firmly fixed. The above-mentioned "pressing the external device against the elastic wiring board" is not limited to pressing the external device directly against the elastic board, but also interposing another member between the external device and the directly elastic board. Includes "pressing".

As described above, according to the first embodiment, the telescopic wiring module 100 can be used by a simple operation of pressing the elastic wiring board 10 and the external device 40 after positioning. That is, according to the first embodiment, it is possible to realize the telescopic wiring module 100 with high usability.

[Modification example]
In the above-described embodiment, the stretchable wiring board 10 has a multilayer structure in which the stretchable base materials 11 and 12 are laminated. However, the structure of the elastic wiring board 10 is not limited to such an example. For example, as shown in FIGS. 10 and 11, the elastic wiring board 10 has a structure in which a single elastic base material provided with an elastic wiring portion is embedded in a protective layer in a folded state. You may have. FIG. 10 is a plan view of the elastic wiring board 10 in the modified example before the external device 40 is attached, as viewed from the upper surface side (upper side of FIG. 6), and FIG. 11 is a WW line of FIG. It is a sectional view. In FIG. 10, the conductive pressure-sensitive adhesive 22, the fixing-strengthening pressure-sensitive adhesive 24, and the biological gel 26 are shown by diagonal lines for convenience.

In this modification, the elastic wiring portion 14 is provided on one main surface of one sheet-shaped elastic base material 50, and the elastic base material 50 is folded with the elastic wiring portion 14 on the outside. As a result, a laminated state of the first base material portion 51 and the second base material portion 52 is formed. Further, an external connection terminal portion 15 and an electrode portion 16 are provided at each tip portion of the elastic wiring portion 14, and by folding the external connection terminal portion 15 and the electrode portion 16, the elastic base material 50 is provided. It is arranged in the opposite direction across the. With such a configuration, the elastic wiring portion 14 can be formed in one step.
In addition, a protective layer 54 is provided on the outer surface of the second base material portion 52, and the external connection terminal portion 15 is arranged in the opening of the protective layer 54. A protective layer 56 is provided on the outer surface of the first base material portion 51, and the electrode portion 16 is arranged in the opening of the protective layer 56.
The other elements forming the elastic wiring board 10, that is, the guide portion 18, the conductive pressure-sensitive adhesive 22, the fixing-strengthening pressure-sensitive adhesive 24, and the biological gel 26 are the same as those in the above-described embodiment. Further, the materials of the elastic base material 50 and the elastic wiring portion 14 may be the same as those in the above-described embodiment.

The protective layers 54 and 56 are preferably made of an insulating and stretchable material. For the protective layers 54 and 56, for example, an elastomer material can be used, and a resin material common to the elastic base material 50 may be used. Thereby, the stretchable wiring portion 14 can be protected without impairing the stretchability of the stretchable wiring board 10. The protective layers 54 and 56 can be prepared by applying an elastomeric paste to the elastic base material 50 and drying it. In addition, the protective layers 54 and 56, which are previously formed in the form of a sheet and have openings formed therein, may be attached to the elastic base material 50, or may be bonded using an adhesive. The thicknesses of the protective layers 54 and 56 are not particularly limited, but are preferably 100 μm or less, more preferably 50 μm or less, and more preferably 30 μm or less from the viewpoint of not hindering the elasticity of the stretchable wiring board 10. Is even more preferable.

Further, in the above-described embodiment and the above-mentioned modification, the stretchable wiring portion 14 is embedded in the stretchable base materials 11 and 12 or the protective layers 54 and 56, but the stretchable wiring portion 14 is stretchable. It may be formed on the surface of the sex wiring board 10. For example, in the above-mentioned modification, a structure in which the protective layers 54 and 56 do not exist may be adopted. In this case, the conductive adhesive 22 needs to be provided at a position separated from the elastic wiring portion 14. Further, when the fixing reinforcing adhesive 24 has conductivity, the fixing reinforcing adhesive 24 needs to be provided at a position separated from the elastic wiring portion 14, the external connection terminal portion 15, and the conductive adhesive 22. There is.

Various components such as the telescopic wiring module 100 and the telescopic wiring board 10 of the present invention do not have to be individually independent. A plurality of components are formed as one member, one component is formed of a plurality of members, one component is a part of another component, and one of the components. It is permissible that a part and a part of other components overlap with each other.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the second embodiment, the members illustrated and described in the first embodiment are designated by the same reference numerals as those used in the second embodiment, and the description thereof will be partially omitted. Further, in the second embodiment, an example in which the telescopic substrate module is attached to a living body and used will be described.
<Expandable board module>
FIG. 12 is a plan view of the telescopic substrate module 200 viewed from the upper surface side (upper side of FIGS. 13 and 14), and FIG. 13 is a sectional view taken along line X2-X2 of FIG. FIG. 14 is a cross-sectional view taken along the line Y2-Y2 of FIG.
The telescopic board module 200 of the second embodiment is the first embodiment in that the terminal portion 42 of the external device 40 and the conductive adhesive 72a are electrically and mechanically connected via the connection relay board 70. It is different from the telescopic board module 100 of. Here, first, the outline of the second embodiment will be described. Also in the second embodiment, for convenience, the back side of the paper surface of FIG. 12 and the lower side of FIGS. 13 and 14 are referred to as the lower surface side, and the front side of the paper surface of FIG. 12 and the upper side of FIGS. 13 and 14 are referred to as the upper surface side. There is. However, this is specified for convenience to explain the relative positional relationship of the components, and does not necessarily coincide with the top and bottom in the direction of gravity.

As shown in FIGS. 12 to 14, the telescopic board module 200 includes a stretchable wiring board 10 and an external device 40. The elastic wiring board 10 has an elastic wiring portion 14 and an external connection terminal portion 15 (FIG. 3) connected to the elastic wiring portion 14 thereof, as in the first embodiment. The external device 40 is formed separately from the elastic wiring board 10, and has a terminal portion 42 on the outside of the surface. In the second embodiment, the connection relay board 70 is arranged between the elastic wiring board 10 and the external device 40.
The connection relay board 70 has a main body 71, and conductive adhesives 72a and 72b are formed in a pattern on the upper surface side (surface 71a) of the main body 71, and the conductive adhesive 72a is on the lower surface side of the external device 40. Is fixed to the upper surface side of the main body 71, and the conductive adhesive 72b fixes the terminal portion 42 of the external device 40 to the upper surface side of the main body 71, and electrically and mechanically connects the external connection terminal portion 15 and the terminal portion 42. Is connected.

<Connection relay board>
As described above, the connection relay board 70 of the telescopic board module 200 is inserted between the external connection terminal portion 15 and the external device 40. The connection relay board 70 has a front surface 71a, which is a surface of the main body 71 facing the external device 40, and a back surface 71b, which is a surface of the main body 71 facing the external connection terminal portion 15. As shown in FIG. 14, the connection relay board 70 is provided between the front surface 71a and the back surface 71b, and is provided on the wiring portion 80b for conducting the external connection terminal portion 15 and the external device 40, and on the front surface 71a and the back surface 71b. It is provided with a relay terminal portion 80a that is provided and conducts with the wiring portion 80b. The relay terminal portion 80a is provided with conductive adhesives 72b and 73b for electrically connecting the relay terminal portion 80a to the external connection terminal portion 15 or the external device 40, respectively. The conductive adhesives 72b and 73b electrically and mechanically connect the external connection terminal portion 15 and the external device 40 via the wiring portion 80b and the relay terminal portion 80a. Further, in the second embodiment, the conductive pressure-sensitive adhesives 72a and 73a are provided around the conductive pressure-sensitive adhesives 72b and 73b.
FIG. 15 is a diagram showing a state in which the external device 40 is removed from the telescopic board module 200 shown in FIG. 12, and shows the surface 71a side of the connection relay board 70 under the external device 40. Further, FIG. 16 is a diagram for explaining the connection of the telescopic board module 200, the connection relay board 70, and the stretchable wiring board 10. As shown in FIGS. 15 and 16, the conductive adhesive 72b is applied to the surface 71a side of the connection relay board 70 at the position corresponding to the external connection terminal portion 15, and the conductive adhesive 72a is applied to the periphery thereof. There is. As shown in FIG. 14, the conductive adhesive 72b enters the opening of the insulating cover 75, which will be described later, and comes into contact with the relay terminal portion 80a. Further, the relay terminal portion 80a is connected to the relay terminal portion 80a on the back surface 71b side via the wiring portion 80b. The conductive adhesive 73b comes into contact with the relay terminal portion 80a. Further, the conductive adhesive 73b is connected to the external connection terminal portion 15 through an opening described later in the connection relay board 70. Therefore, the telescopic board module 200 can transmit the signal of the living body or the like input from the electrode portion 16 in the order of the elastic wiring portion 14, the external connection terminal portion 15, and the terminal portion 42 and input the signal to the external device 40. can.

17 (a), 17 (b) and 17 (c) are exploded perspective views of the connection relay board 70. FIG. 17A shows the conductive adhesive 78 applied to the front surface 71a and the back surface 71b of the connection relay board 70. The conductive pressure-sensitive adhesive 78 is formed by kneading a pressure-sensitive adhesive resin such as an acrylic polymer or a urethane-based resin with a conductive filler such as a metal filler or a carbon filler. The coating thickness of the conductive pressure-sensitive adhesive 78 is preferably in the range of, for example, 5 μm or more and 10 μm or less. FIG. 17B shows an insulating cover 75 to which the conductive pressure-sensitive adhesive 78 is applied. The thickness of the insulating cover 75 is preferably, for example, 10 μm or more and 40 μm or less, and more preferably 15 μm to 18 μm. As the material of the insulating cover 75, for example, polyethylene terephthalate (PET), polyester, or a polyimide coverlay for a general FPC (Flexible Print Circuit) is used. Furthermore, the elastic base material 11 or 12 used for the elastic wiring board 10 may be used, and in this case, there is an advantage that the insulating cover 75 can be formed by simple means of heating and pressurizing.
FIG. 17C shows the wiring board 77. The wiring board 77 is a base material in which a wiring 80 having a relay terminal portion 80a and a wiring portion 80b is formed on a base material 79 by printing or the like. The base material 79 and the wiring 80 may or may not have elasticity.
The base material 79 has a first region 71c and a second region 71d adjacent to the first region. Here, the first region 71c is a region below the surface 71a of the main body 71 shown in FIGS. 13 and 14. Further, the second region 71d is a region below the back surface 71b of the main body 71 shown in FIG. The thickness of the base material 79 is, for example, preferably 12.5 μm or more and 100 μm or less, and more preferably 60 μm or more and 85 μm or less. However,
The insulating cover 75 and the wiring board 77 have approximately the same size. In the second embodiment, the insulating cover 75 and the wiring board 77 overlap each other so that the insulating cover 75 covers the upper surface side of the wiring board 77. Further, the conductive pressure-sensitive adhesive 78 is formed by applying the conductive pressure-sensitive adhesive to the upper side surface of the insulating cover 75 in a state of being overlapped with the wiring board 77.

18 (a), 18 (b) and 18 (c) show the wiring board 77, the insulating cover 75 and the conductivity in the assembled state as described with reference to FIGS. 17 (a) to 17 (c). It is a figure for demonstrating the process of forming a connection relay board 70 from an adhesive 78. As shown in FIG. 18A, the wiring board 77, the insulating cover 75, and the conductive adhesive 78 are integrally formed into a sheet. As shown in FIG. 18B, in the second embodiment, the sheet-shaped wiring board 77, the insulating cover 75, and the conductive adhesive 78 shown in FIG. 18A are used as the first region of the base material 79. The base material 79 is bent so as to be inside the boundary BB with the second region. At this time, in the second embodiment, the double-sided tape 81 is inserted between the base materials 79 and adhered so that the opposing surfaces of the base materials 79 do not separate from each other. At this time, instead of the double-sided tape 81, a coating type adhesive or an adhesive may be used. In the second embodiment, as shown in FIG. 18C, the connection relay board 70 can be manufactured by such a step. The thickness of the wiring board 77 and the insulating cover 75 is determined in consideration of handling when the wiring board 77 and the insulating cover 75 shown in FIG. 18A are bent.

<Manufacturing method of connection relay board>
Next, a method of manufacturing the connection relay board of the second embodiment will be described. In this manufacturing method, the base material 79 having the wiring portion 80b formed from the first region 71c to the second region 71d shown in FIG. 17C is overlapped with the relay terminal portion 80a following the wiring portion 80b. It includes a bonding step of bonding with an insulating cover 75, which is an insulating sheet member having openings 74a and 74b. Further, the second embodiment is described in the above-described step of forming the conductive pressure-sensitive adhesive, in which the conductive pressure-sensitive adhesives 72a, 72b, 73a, 73b are provided on the back surface of the insulating cover 75 with respect to the surface bonded to the base material 79. Bending step of bending the base material and the insulating sheet member bonded in the bonding step so that the base material 79 enters the inside with the boundary BB between the first region 71c and the second region 71d of the base material 79 as a boundary. And, including.
More specifically, the insulating cover 75 shown in FIG. 17 (b) and the base material 79 shown in FIG. 17 (c) are bonded together. In the bonding, the opening 74a of the insulating cover 75 overlaps the relay terminal portion 80a in the first region 71c of the wiring board 77, and the opening 74b of the insulating cover 75 overlaps the relay terminal portion 80a in the second region 71d. Will be done in. Further, the bonding can be performed, for example, by heating and pressurizing the insulating cover 75 and the base material 79 to fuse them together. As the heating means, a laminating method using a heating roll or a heating press means can be adopted. In addition, such a bonding step may be performed in a state where the insulating cover 75 and the base material 79 are covered with a separator (not shown).

Next, in the second embodiment, the insulating cover 75 and the base material 79 which are bonded and not folded in half are brought into a state where the insulating cover 75 is on the upper surface side. Then, the conductive adhesive is applied to the first region 71c and the second region 71d at once on the upper surface side. By such a step, in the second embodiment, the conductive adhesive 72a is applied to the region of the insulating cover 75 on the first region 71c excluding the opening 74a, and the relay terminal portion 80a exposed from the opening 74a. The conductive pressure-sensitive adhesive 72b is applied to the surface. Further, the conductive adhesive 73a is applied to the region of the insulating cover 75 on the second region 71d excluding the opening 74b, and the conductive adhesive 73b is applied to the relay terminal portion 80a exposed from the opening 74b. .. At this time, the conductive pressure-sensitive adhesive is applied on the upper surfaces of the conductive pressure-sensitive adhesives 72a, 72b, 73a, and 73b at the same height, and enters the openings 74a, 74b. The conductive adhesive that has entered the openings 74a and 74b is electrically connected to the relay terminal portion 80a under the insulating cover 75.
According to such a step, the conductive pressure-sensitive adhesive can be applied to both sides of the insulating cover 75 at one time, the processing time related to the manufacturing process of the connection relay board can be shortened, and the number of processing steps can be reduced. Will be possible. In addition, the processing itself can be simplified to increase the yield of the product.

Next, in the second embodiment, a bending step is performed to bend the insulating cover 75 and the base material 79 coated with the conductive pressure-sensitive adhesive. By bending the insulating cover 75 and the base material 79, the insulating cover 75 covers the base material 79, and the wiring 80 is sandwiched between the insulating cover 75 and the base material 79. If there is a concern that the surface of the base material 79 that comes into contact with the base material 79 will open due to the elasticity of the base material 79 or the insulating cover 75, a double-sided tape 81 is attached between the base materials 79. May be good.

According to the second embodiment described above, the external device 40 can be very easily connected to the elastic wiring board 10 via the connection relay board 70.
Further, the second embodiment is not limited to the configuration described above. For example, various components such as the telescopic board module 200 and the stretchable wiring board 10 of the second embodiment do not have to be individually independent. A plurality of components are formed as one member, one component is formed of a plurality of members, one component is a part of another component, and one of the components. It is permissible that a part and a part of other components overlap with each other.

The above embodiment includes the following technical ideas.
(1) An external device having an elastic wiring portion and an external connection terminal portion connected to the elastic wiring portion, and the elastic wiring board are separate bodies, and the terminal portion is formed on the outer surface of the surface. A conductive adhesive is provided on the external connection terminal portion of the elastic wiring board, the external device is detachably attached to the elastic wiring board, and the terminal portion and the external device are attached. A stretchable substrate module in which a connection terminal portion is electrically and mechanically connected by the conductive adhesive.
(2) A fixing and strengthening adhesive is provided in at least a part of a region of the main surface of the elastic wiring board facing the external device, and the terminal portion and the external connection terminal portion are connected by the conductive adhesive. The stretchable substrate module according to (1), wherein the external device is connected and joined to the stretchable wiring board by the fixing reinforcing adhesive at least in the region.
(3) The telescopic board module according to (2), wherein the region provided with the fixing reinforcing adhesive is a region on the main surface separated from the external connection terminal portion.
(4) The adhesive strength of the conductive pressure-sensitive adhesive and the fixing-strengthening pressure-sensitive adhesive is higher than that of the external device or the terminal portion of the external device, that is, the external connection terminal of the elastic wiring board or the elastic wiring board. The telescopic board module according to (2) or (3), which is higher than the unit.
(5) The telescopic board module according to any one of (1) to (4), wherein the surface of the external device facing the stretchable wiring board is formed in a concave shape.
(6) The conductive pressure-sensitive adhesive previously applied onto the external connection terminal portion has a circular shape having a diameter of 1 mm or more and 5 mm or less, or a rectangular shape having a length of at least one side of 1 mm or more and 5 mm or less (1). ) To (5). The telescopic board module according to any one of (5).
(7) The stretchable board module according to any one of (1) to (6), wherein the stretchable wiring board further has a guide portion provided in the vicinity of the mounting position of the external device.
(8) The connection relay board is inserted between the external connection terminal portion and the external device, and the connection relay board faces the surface of the surface facing the external device and the external connection terminal portion. A wiring portion provided between the back surface and the back surface to conduct the external connection terminal portion and the external device, and a relay terminal portion provided on the front surface and the back surface and connected to the wiring portion. , And the conductive pressure-sensitive adhesive is provided on the relay terminal portion, respectively, and between the external connection terminal portion and the external device via the wiring portion and the relay terminal portion. The telescopic board module according to any one of (1) to (3), which is electrically and mechanically connected.
(9) An elastic base material, an elastic wiring portion, an external connection terminal portion connected to the elastic wiring portion, a conductive pressure-sensitive adhesive provided on the external connection terminal portion, and at least the conductive pressure-sensitive adhesive. An elastic wiring board comprising a peeling sheet for covering the external connection terminal portion provided with the above.
(10) Further provided with a fixing and strengthening pressure-sensitive adhesive provided in at least a part of a region on one main surface of the stretchable base material, and the release sheet is the region provided with the fixing and strengthening pressure-sensitive adhesive. The elastic wiring board according to (9), which further covers the above.
(11) The expansion and contraction according to (10), wherein the height of the fixing reinforcing pressure-sensitive adhesive from the one main surface of the stretchable base material is lower than the height of the conductive pressure-sensitive adhesive from the one main surface. Sex wiring board.
(12) The elasticity according to any one of (9) to (11), further comprising a guide portion that presents a mounting position of an external device having a terminal portion electrically connected to the external connection terminal portion. Wiring board.
(13) A connection relay board arranged on the external connection terminal portion is provided, and the connection relay board has a first surface that faces the external connection terminal portion and a back surface that is a back surface with respect to the first surface. It has a wiring portion provided between the two surfaces and connected to the external connection terminal portion, and a relay terminal portion provided on the first surface and the second surface and connected to the wiring portion. The elastic wiring board according to any one of (9) to (12), wherein the conductive adhesive is provided on the external connection terminal portion with the relay terminal portion interposed therebetween.
(14) A step of forming an elastic wiring portion on at least one main surface of the elastic base material, a step of forming an external connection terminal portion connected to the elastic wiring portion, and a conductive step on the external connection terminal portion. A method for manufacturing an elastic wiring substrate, comprising a step of arranging a flexible pressure-sensitive adhesive and a step of covering the conductive pressure-sensitive adhesive provided on the external connection terminal portion with a release sheet.
(15) An elastic wiring board including an elastic base material, an elastic wiring portion, an external connection terminal portion connected to the elastic wiring portion, and a conductive adhesive provided on the external connection terminal portion, and the elastic wiring board. In the method of manufacturing a telescopic board module including an external device having a terminal portion formed on the outer surface of the surface, which is separate from the sex wiring board, the external connection terminal portion and the terminal portion are located at positions facing each other. The process of aligning the elastic wiring board and the external device, the external device is pressed against the elastic wiring board, and the terminal portion and the external connection terminal portion are electrically and mechanically pressed by the conductive adhesive. Manufacturing method of the telescopic board module including the process of connecting in a positive manner.
(16) The telescopic board module has a connection relay board inserted between the external connection terminal portion and the external device, and a step of manufacturing the connection relay board includes a first region and the first region. A base material portion having a second region adjacent to the region and having a wiring portion formed from the first region to the second region, and an opening overlapped with a relay terminal portion following the wiring portion. A bonding step of bonding the insulating sheet member to be provided, and a conductive pressure-sensitive adhesive forming step of providing the conductive pressure-sensitive adhesive on the back surface of the insulating sheet member with respect to the surface bonded to the base material portion.
A bending step of bending the base material portion and the insulating sheet member bonded in the bonding step so that the base material portion is inside with the boundary between the first region and the second region as a boundary. The method for manufacturing a telescopic board module according to (15).

10 Elastic wiring board 11, 12, 50 Elastic base material 14, 14a, 14b Elastic wiring part 15 External connection terminal part 16 Electrode part 17, 19 Opening 18 Guide part 22 Conductive adhesive 24 Adhesive for fixing reinforcement 26 Biogel 30 Peeling sheet 40 External device 41 Housing 42 Terminal part 51 First base material part 52 Second base material part 54, 56 Protective layer 70 ・ ・ ・ Connection relay board 71 ・ ・ ・ Main body 71a ・ ・ ・ Surface 71b ・・ ・ Back surface 71c ・ ・ ・ First area 71d ・ ・ ・ Second area 72a, 72b, 73a, 73b ・ ・ ・ Conductive adhesive 74a, 74b ・ ・ ・ Opening 75 ・ ・ ・ Insulation cover 77 ・ ・ ・ Wiring board 78 ・ ・ ・ Conductive adhesive 79 ・ ・ ・ Base material 80 ・ ・ ・ Wiring 80a ・ ・ ・ Relay terminal part 80b ・ ・ ・ Wiring part 81 ・ ・ ・ Double-sided tape 100, 200 Telescopic wiring (board) module

Claims (8)

An elastic wiring board having an elastic wiring portion and an external connection terminal portion connected to the elastic wiring portion,
An external device that is separate from the elastic wiring board and has terminals formed on the outside of the surface.
A connection relay board inserted between the external connection terminal and the external device,
Equipped with
A conductive adhesive is provided on the external connection terminal portion of the elastic wiring board, and the conductive adhesive is provided.
Contact Ri said external device is detachably mounted in the stretchable wiring board via the connection relay substrate,
The connection relay board is
A first region below the front surface that faces the external device, a second region that is adjacent to the first region and below the back surface that faces the external connection terminal portion, and the first region. said second over the area being formed, the external connection terminal portion and the base portion having a wiring for electrically connecting the external device,
A wiring portion formed on the base material portion and constituting the wiring, and a wiring portion .
The Configure wiring formed on the base portion, the surface and provided on the back surface, and a relay terminal portion connected to the wiring portion,
It has an insulating sheet member having an opening that is overlapped with the relay terminal portion that follows the wiring portion.
The base material portion and the insulating sheet member are bent so that the base material portion enters the inside at the boundary between the first region and the second region.
The conductive adhesive is provided on the relay terminal portion over the front surface and the back surface of the connection relay board, respectively, and is externally connected via the wiring portion and the relay terminal portion. between the terminal portion of the terminal portion an external device is electrically and mechanically connected,
Telescopic board module. The surface of the external device facing the elastic wiring board is formed in a concave shape.
The telescopic board module according to claim 1. The conductive adhesive previously applied onto the external connection terminal portion has a circular shape having a diameter of 1 mm or more and 5 mm or less, or a rectangular shape having a length of at least one side of 1 mm or more and 5 mm or less.
The telescopic board module according to claim 1 or 2. The elastic wiring board further has a guide portion provided in the vicinity of the mounting position of the external device.
The telescopic board module according to any one of claims 1 to 3. With elastic base material,
Elastic wiring part and
The external connection terminal part connected to the elastic wiring part and
A conductive pressure sensitive adhesive provided on the external connection terminal portions,
And connecting a relay board disposed on the front Kigaibu connection terminal portion,
Equipped with
The connection relay board is
A first surface which is directed toward the external connection terminal portions, and the disposed between the second surface comprising a rear surface with respect to the first surface, the base portion having a wiring connected to an external connection terminal portions ,
A wiring portion formed on the base material portion and constituting the wiring, and a wiring portion.
A relay terminal portion formed on the base material portion to form the wiring , provided on the first surface and the second surface, and connected to the wiring portion,
It has an insulating sheet member having an opening that is overlapped with the relay terminal portion that follows the wiring portion.
The base material portion and the insulating sheet member are bent so that the base material portion enters the inside at the boundary between the first surface and the second surface.
The conductive adhesive is provided on the relay terminal portion and on the insulating sheet member over the first surface and the second surface of the connection relay board, and sandwiches the relay terminal portion. Provided on the external connection terminal portion,
Elastic wiring board. A guide unit that presents the mounting position of an external device having a terminal unit that is electrically connected to the external connection terminal unit.
The elastic wiring board according to claim 5. Elastic base material,
Elastic wiring part,
An external connection terminal portion connected to the elastic wiring portion and a conductive adhesive provided on the external connection terminal portion.
With elastic wiring board,
A connection relay board inserted between the external connection terminal and an external device,
In the method of manufacturing a telescopic wiring board provided with
The connection relay board is
From the first region below the front surface, which is the surface facing the external device, the second region below the back surface, which is adjacent to the first region and facing the external connection terminal portion, and the first region. said second over the area being formed, the external connection terminal portion and the base portion having a wiring for electrically connecting the external device,
A wiring portion formed on the base material portion and constituting the wiring, and a wiring portion.
Is formed on the base portion constitutes the wiring, the relay terminal portion connected to the wiring portion,
It has an insulating sheet member having an opening that is overlapped with the relay terminal portion that follows the wiring portion.
The process of manufacturing the connection relay board and
A step of forming the stretchable wiring portion on at least one main surface of the stretchable base material, and
The process of forming the external connection terminal portion connected to the elastic wiring portion, and
The step of disposing the conductive adhesive on the external connection terminal portion, and
A step of covering the conductive adhesive provided on the external connection terminal portion with a release sheet, and
Including
The process of manufacturing the connection relay board is
A bonding step of bonding the base material portion and the insulating sheet member, and
A conductive pressure-sensitive adhesive forming step of providing the conductive pressure-sensitive adhesive on the back surface of the insulating sheet member with respect to the surface bonded to the base material portion.
A bending step of bending the base material portion and the insulating sheet member bonded in the bonding step so that the base material portion is inside with the boundary between the first region and the second region as a boundary. Including
The conductive adhesive is used to electrically and mechanically connect the external connection terminal portion and the external device via the wiring portion and the relay terminal portion.
Manufacturing method of elastic wiring board. Elastic base material,
Elastic wiring part,
An external connection terminal portion connected to the elastic wiring portion and a conductive adhesive provided on the external connection terminal portion.
With elastic wiring board,
An external device that is separate from the elastic wiring board and has terminals formed on the outside of the surface.
A connection relay board inserted between the external connection terminal and the external device,
In the manufacturing method of the telescopic board module provided with
The connection relay board is
From the first region below the front surface, which is the surface facing the external device, the second region below the back surface, which is adjacent to the first region and facing the external connection terminal portion, and the first region. said second over the area being formed, the external connection terminal portion and the base portion having a wiring for electrically connecting the external device,
A wiring portion formed on the base material portion and constituting the wiring, and a wiring portion.
Is formed on the base portion constitutes the wiring, the relay terminal portion connected to the wiring portion,
It has an insulating sheet member having an opening that is overlapped with the relay terminal portion that follows the wiring portion.
The process of manufacturing the connection relay board and
A step of aligning the elastic wiring board and the connection relay board at positions where the external connection terminal portion and the relay terminal portion face each other.
A step of pressing the external device against the connection relay board and electrically and mechanically connecting the terminal portion and the relay terminal portion with the conductive adhesive.
Including
The process of manufacturing the connection relay board is
A bonding step of bonding the base material portion and the insulating sheet member, and
A conductive pressure-sensitive adhesive forming step of providing the conductive pressure-sensitive adhesive on the back surface of the insulating sheet member with respect to the surface bonded to the base material portion.
A bending step of bending the base material portion and the insulating sheet member bonded in the bonding step so that the base material portion is inside with the boundary between the first region and the second region as a boundary. Including
The conductive adhesive is used to electrically and mechanically connect the external connection terminal portion and the external device via the wiring portion and the relay terminal portion.
How to manufacture a telescopic board module.

Images