JP6953050B2 - Conductive member - Google Patents

Description

The disclosure in this application relates to conductive members.

Since wireless communication devices such as smartphones transmit and receive various high-frequency electromagnetic waves, they can be a source of noise. The noise generated by the wireless communication device may cause a malfunction of the wireless communication device itself or peripheral electronic devices, and may interfere with the normal operation of these devices. For this reason, EMI (ElectroMagnetic Interference) measures that suppress noise generated by wireless communication devices so as not to affect the wireless communication devices themselves and surrounding electronic devices are indispensable inside the wireless communication devices.

One of the EMI countermeasure methods is grounding in which noise that tries to enter the electronic circuit part of an electronic device such as a wireless communication device is released to the ground. As the EMI countermeasure component, for example, as shown in Patent Document 1, a conductive sheet and a conductive contact portion mainly made of an elastomer bonded to one side of the conductive sheet are provided, and the surface of the contact portion is conductive. Conductive contacts with a coating of are known. This conductive contact is surface-mounted by soldering a conductive sheet to the ground pattern of the printed wiring board, and noise is prevented by pressing the top of the contact part against a ground electrode or the like to ground the printed wiring board. There is.

Japanese Unexamined Patent Publication No. 2008-123788, FIG.

By the way, general conductive rubber and metal leaf springs are often used for EMI countermeasure parts of electronic devices. These EMI countermeasure components are conductively connected to each other in a state of being compressed by the housing and the substrate. And, for example, in a smartphone, a large number of EMI countermeasure parts may be used for ground connection as an EMI countermeasure. Therefore, when assembled as a product, the pressing load is accumulated and increased due to the large number of EMI countermeasure parts, and it becomes difficult to achieve both the strength of the housing and the substrate and the thinness and weight reduction of the product.

Also in the conductive contact of Patent Document 1 described above, a conductive elastomer in which a conductive filler is dispersed using silicone rubber as an elastomer as a binder is used. Further, in the conductive contact of Patent Document 1, the coating film on the surface of the contact portion is made of a metal or a metal oxide. Therefore, in the conductive contact of Patent Document 1, both the conductive elastomer and the coating film are hard, and the pressing load becomes large.

An object of the present application is to reduce the pressing load of the conductive member to be electrically connected.

Some aspects disclosed in this application to achieve the above objectives are configured to have the following characteristics:

That is, one aspect disclosed in the present application is that the conductive member that conductively connects the first connection object and the second connection object has a conductive base material that comes into contact with the first connection object. A stretchable elastic body having a conductive portion with the conductive base material and in contact with the second connection object, and a gel-like elastic body provided between the conductive base material and the stretchable conductive film. The stretchable conductive film is characterized in that it can be stretched and deformed together with the compressive deformation of the gel-like elastic body.

According to this aspect, the stretchable conductive film that conductively connects the conductive base material and the second connection object is configured to be stretchable and deformable according to the compressive deformation of the gel-like elastic body. Therefore, the gel-like elastic body can be softly deformed. Therefore, when the conductive member is compressed by the first connection object and the second connection object, they can be conductively connected with a low load.

The stretchable conductive film has a coating portion that covers at least a part of the surface of the gel-like elastic body, and the gel-like elastic body is compressed and deformed by being pressed to cause the coating of the stretchable elastic body. It can be configured so that it can bulge and deform with reference to the portion.

Since the coating portion of the stretchable conductive film covers a part of the surface of the gel-like elastic body, the gel-like elastic body may be elastically deformed without being restrained by the coating portion in a portion not covered by the coating portion. can. Therefore, in the conductive member, the gel-like elastic body can be softly and elastically deformed.

The conductive member further has an electric element constituting the conductive base material, and the conductive base material is a conductive contact portion of the electric element, and is the first connection object and the stretchable conductive material. It can be configured to be conductive with.

According to this aspect, an electric element having a conductive contact portion in advance can be used as a conductive base material. Therefore, a highly reliable conductive member can be easily manufactured in large quantities at low cost by using an electronic element whose quality characteristics such as dimensions, mechanical characteristics, and electrical characteristics are guaranteed at a predetermined level.

The conductive base material may be configured to be a plate-shaped or foil-shaped metal material.

According to this aspect, the conductive member can be configured so that the conductive base material has conductivity between the first connection object and the stretchable conductive film.

The gel-like elastic body can be configured to have a needle insertion degree of 30 to 90.

According to this aspect, the gel-like elastic body is composed of a needle insertion degree of 30 to 90. This is sufficiently soft compared to, for example, a polymer elastic body made of general rubber. Therefore, as compared with, for example, a polymer elastic body made of general rubber, the load when the gel-like elastic body is compressed by the first connection object and the second connection object is sufficiently reduced. Can be made to.

The gel-like elastic body may be configured such that the side of the second connection object is a flat surface.

According to this aspect, the gel-like elastic body is formed of a flat surface on the side of the second connection object. Then, the stretchable conductive film covering the flat surface becomes the electrical connection surface with the second connection object. In this way, since the electrical connection surface is formed as a flat surface, the contact resistance between the conductive member and the second connection object can be reduced. Therefore, according to this aspect, the conductive connection by the conductive member can be stabilized.

The stretchable conductive film can be made of a material similar to the gel-like elastic body.

According to this aspect, since the stretchable conductive film covering the gel-like elastic body is made of a material similar to the gel-like elastic body, the adhesiveness between the gel-like elastic body and the stretchable conductive film is enhanced. Can be done. Further, since the gel-like elastic body and the elastic conductive film are made of similar materials, the difference between the elastic modulus of the elastic conductive film and the elastic modulus of the gel-like elastic body can be reduced. Therefore, the stretchable conductive film can be expanded and contracted following the deforming gel-like elastic body.

The stretchable conductive film can be formed by containing flake-shaped metal particles in a polymer base material.

In the flake-shaped metal particles, the volume (electrical) resistivity of the stretchable conductive film can be made low even if the filling amount for the polymer base material is relatively small. Therefore, according to one aspect of the present invention, the filling amount of the flake-shaped metal particles in the polymer base material can be reduced, and the difference between the elastic modulus of the elastic conductive film and the elastic modulus of the gel-like elastic body. Can be made smaller. Further, in the flake-shaped metal particles, the change in resistivity when the stretchable conductive film expands and contracts can be reduced.

The stretchable conductive film includes a metal-based conductive film formed by containing flake-shaped metal particles in a polymer base material, and the metal that is laminated on the metal-based conductive film and responds to compressive deformation of the gel-like elastic body. The conductive member can be configured to have a stretchable conductive protective film that can be stretched and deformed together with the system conductive film.

According to this aspect, since the stretchable conductive protective film has conductivity, the stretchable conductive film has conductivity so as to have conductivity as in the case where the stretchable conductive protective film is not laminated on the metal-based conductive film. A membrane can be constructed. Further, since the elastic conductive protective film is laminated on the metal conductive film, it is possible to protect the metal conductive film from corrosion and the like without exposing it. Since this stretchable conductive protective film is configured to be stretchable and deformable together with the metal-based conductive film in response to compressive deformation of the gel-like elastic body, the stretchable conductive protective film is not laminated on the metal-based conductive film. As in the case, the gel-like elastic body can be softly deformed.

The stretchable conductive protective film can be configured to contain a conductive carbon allotrope in the polymer base material.

According to this aspect, since a stretchable conductive protective film containing a conductive carbon homogeneity in a polymer base material is laminated on a metal-based conductive film, the conductivity of the stretchable conductive film and the flexibility of the conductive member are obtained. It is possible to protect the metal-based conductive film from corrosion and the like while maintaining the above.

The elastic conductive protective film can be configured to have a film thickness of 5 to 50 μm.

According to this aspect, since the stretchable conductive protective film has an appropriate film thickness, it is possible to protect the metal-based conductive film from corrosion and the like while giving the stretchable conductive protective film flexibility and conductivity. ..

The stretchable conductive protective film is configured to contain graphene, and the graphene can form a conductive member so as to be oriented along the surface direction of the surface of the stretchable conductive film.

According to this aspect, since graphene is oriented along the surface direction of the surface of the stretchable conductive film, the electrical conductivity in the orientation direction can be increased.

The flake-shaped metal particles have an aspect ratio of 2 or more, an average particle size of 1 to 50 μm, and can be configured to be oriented along the surface direction of the surface of the stretchable conductive film.

According to this aspect, since the flake-shaped metal particles have an aspect ratio of 2 or more and an average particle size of 1 to 50 μm, the conductivity in the plane direction can be maintained even if the stretchable conductive film is stretched and deformed. According to this aspect, since the flake-shaped metal particles are oriented along the surface direction of the surface of the stretchable conductive film, the electrical conductivity in the orientation direction can be increased.

The surface of the gel-like elastic body extends along the compression direction in which the gel-like elastic body is compressed, and the first surface thereof is compared with the side of the first connection object in the crossing direction with respect to the compression direction. It can be formed without spreading the side of the object to be connected of 2.

According to this aspect, the surface of the gel-like elastic body is formed so that the side of the second connection object does not expand as compared with the side of the first connection object in the crossing direction with respect to the compression direction of the gel-like elastic body. ing. Therefore, the gel-like elastic body is not arranged so that the side of the first object to be connected is recessed, and it is not difficult to form the conductive film. Further, when the gel-like elastic body is compressed, the gel-like elastic body may overlap at the inside corner portion of the gel-like elastic body, particularly on the side of the first connection object, so that the pressing load may increase. No.

The gel-like elastic body can be configured to have at least a part of the surface of the gel-like elastic body having an exposed portion that is not covered with the stretchable conductive film.

The gel-like elastic body is softer than the stretchable conductive film. Therefore, the exposed portion is a portion that is easily deformed when an external force is applied, as compared with the portion where the gel-like elastic body is covered with the elastic conductive film. According to one aspect of the present invention, the gel-like elastic body is configured to have an exposed portion that is not covered with the stretchable conductive film. That is, the conductive member is configured to be deformable so that the exposed portion easily bulges when the gel-like elastic body is compressed by the first connection object and the second connection object. Further, according to this aspect, the stretchable conductive film is configured to be more flexible than, for example, a structure in which the entire surface of the gel-like elastic body is covered. Therefore, for example, when the conductive member is compressed by the first connection object and the second connection object, as compared with the configuration in which the entire surface of the gel-like elastic body is covered with the elastic conductive film. The load can be reduced.

The exposed portions of the gel-like elastic body face each other in opposite directions, and can be configured to be a surface perpendicular to the bottom surface of the conductive base material.

According to this aspect, the exposed portions are composed of a set of vertical planes facing each other. Therefore, when the gel-like elastic body is compressed by the metal housing and the circuit board in the compression direction which is the vertical plane with respect to the bottom surface, each set of vertical planes is efficiently directed toward the outside of the vertical plane. It can be bulged and the load due to compression can be reduced. Further, since the set of vertical surfaces of the exposed portion are arranged so as to face each other, the load when the conductive member is compressed by the metal housing and the circuit board is evenly distributed to the set of vertical surfaces. It becomes easier to transmit, and each one becomes easier to bulge and deform.

The conductive base material is a plate material having flat surfaces on both sides of the first connection object side and the second connection object side, and can be configured to have conductive metal foils on at least both sides. ..

According to this aspect, since the conductive base material is made of a plate material having flat surfaces on both sides of the first connection object side and the second connection object side, the gel-like elastic body can be bent. It can be suppressed and the handleability of the conductive member can be improved.

The gel-like elastic body can be made of a non-conductive material.

According to this aspect, the gel-like elastic body is made of a non-conductive material. Therefore, in the conductive member, the gel-like elastic body can be configured to be sufficiently soft and easily deformed, and the load when the conductive member is compressed by the metal housing and the circuit board can be reduced.

According to the disclosure of the present application, it is possible to provide a conductive member that conductively connects the first connection object and the second connection object when they are compressed by the second connection object with a low load.

FIG. 3 is an external perspective view including a front surface, a right side surface, and a plane showing the conductive member according to the first embodiment. FIG. 3 is an external perspective view including a front surface, a right side surface, and a plane showing the conductive member according to the second embodiment. FIG. 3 is an external perspective view including a front surface, a right side surface, and a plane showing the conductive member according to the third embodiment. FIG. 6 is an external perspective view including a front surface, a right side surface, and a plane showing the conductive member according to the fourth embodiment. FIG. 5 is an external perspective view including a front surface, a right side surface, and a plane showing the conductive member according to the fifth embodiment. 6A is a view showing a conductive member according to a sixth embodiment, FIG. 6A is an external perspective view including a front surface, a right side surface, and a plane, and FIG. 6B is a sectional view taken along line VIB-VIB of FIG. 6A. FIG. 6 is an external perspective view including a front surface, a right side surface, and a plane showing the conductive member according to the seventh embodiment. FIG. 5 is an external perspective view including a front surface, a right side surface, and a plane showing the conductive member according to the eighth embodiment. FIG. 5 is an external perspective view including a front surface, a right side surface, and a plane showing another example of the conductive member according to the eighth embodiment. FIG. 5 is an external perspective view including a front surface, a right side surface, and a plane showing the conductive member according to the ninth embodiment. FIG. 5 is an external perspective view including a front surface, a right side surface, and a plane showing another example of the conductive member according to the ninth embodiment. The front view which shows the deformation example of a conductive member. FIG. 5 is an external perspective view including a front surface, a right side surface, and a plane showing the conductive member according to the tenth embodiment.

Hereinafter, examples of the embodiments disclosed in the present application will be described with reference to the drawings. The same reference numerals are given to the configurations common to the following embodiments, and duplicate description in the specification is omitted. Further, duplicate description will be omitted for the usage method and the action and effect common to each embodiment. Here, in the present specification and the scope of claims, when "first" and "second" are described, they are used to distinguish different components, and a specific order or superiority or inferiority is used. It is not used to indicate.

The "conductive member" disclosed in the present application is for conductively connecting an adherend as a "first connection object" and a "second connection object". As one aspect of the "first connection object", a metal housing such as an electric device can be exemplified. As one aspect of the "second connection object", a circuit board housed in a metal housing can be exemplified. The "conductive member" is such that the first connection object (for example, a metal housing) and the second connection object (for example, a circuit board), which are arranged so as to face each other, are compressed to electrically connect the first connection object (for example, a circuit board). It is configured in. As an EMI countermeasure component, the "conductive member" can function as a grounding that allows noise that is about to enter an electronic circuit portion of a wireless communication device or the like to escape to the ground.

In the scope of the present specification and patent claims, for convenience, as shown in FIG. 1 and the like, the width direction (horizontal direction) of the conductive member 10 is the X direction, the depth direction (front-back direction) is the Y direction, and the height direction (up and down). Direction) is described as the Z direction. Further, in the Y direction, the front side of FIG. 1 and the like is described as the front side of the conductive member 10, and the back side is described as the rear side of the conductive member 10. Then, in the conductive member 10, the side to be placed on the metal housing (not shown) is described as the lower side in the Z direction. However, they do not limit the connection direction, the compression direction, the arrangement direction with respect to the electronic device, and the like of the conductive member 10.

First Embodiment [Fig. 1]

The conductive member 10 of the present embodiment has a conductive base material 11, a base base material 12 as a "gel-like elastic body", and a stretchable conductive film 13. The conductive member 10 has a rectangular parallelepiped shape having a brim shape at the lower ends on both outer sides in the X direction. In the conductive member 10, a conductive base material 11 located at the lower end in the Z direction is placed, for example, in a metal housing (first object to be connected) (not shown). On the other hand, the conductive member 10 is arranged so that the elastic conductive film 13 provided so as to cover the upper end in the Z direction comes into contact with, for example, a circuit board (second connection object) (not shown). The base base material 12 is provided between the conductive base material 11 and the stretchable conductive film 13.

The conductive base material 11 forms the basis of the structure of the conductive member 10, and also electrically connects the metal housing and the stretchable conductive film 13. The conductive base material 11 has a flat plate shape that is longer in the X and Y directions than in the Z direction. The conductive base material 11 has a bottom surface 11a and a top surface 11b. Both the bottom surface 11a and the top surface 11b extend along the XY plane, and both are flat. Therefore, the conductive base material 11 is configured to be flat on both the upper and lower surfaces. The conductive base material 11 is made of a plate material having a rigidity sufficient to suppress the bending of the soft base base material 12 placed on the upper surface 11b. As described above, the conductive base material 11 which is a plate material can suppress the bending of the base base material 12 and improve the handleability of the conductive member 10.

The conductive base material 11 is made of a plate-shaped metal material. As a result, the conductive base material 11 has conductivity between the bottom surface 11a which is conductively connected to the metal housing and the upper surface 11b which is electrically connected to the elastic conductive film 13.

The conductive base material 11 is not limited to the plate-shaped metal material, and may be made of a foil-shaped metal material. As the metal, for example, copper or aluminum can be used. The metal plate or metal foil in which these are used is easy to use as a base for molding the base base material 12, and is preferable because it can be fixed to the metal housing by soldering. Further, the conductive base material 11 does not have to be composed of a single metal plate or metal foil, and may have conductivity between the bottom surface 11a and the top surface 11b. Therefore, the conductive base material 11 may be a laminated plate having conductive metal foils on both sides of at least the bottom surface 11a and the top surface 11b. As the substrate on which the metal foil is laminated, a synthetic resin plate, a ceramic plate, or the like can be used.

The conductive base material 11 is preferably a material that can be soldered by a reflow method. Since the conductive base material 11 is a reflowable material, the conductive member 10 can be mounted on an object to be connected (a metal housing or the like). Examples of the material that can be heat-soldered by the reflow method include a metal plate, a metal plating plate, and a ceramic substrate having a metal circuit.

Further, as the conductive base material 11, a conductive sticking member capable of fixing the conductive member 10 by sticking to a metal housing which is an adherend can be used. As the conductive adhesive member, for example, a conductive adhesive or a conductive adhesive tape in which a copper foil or the like is previously coated with the conductive adhesive can be used. When the conductive sticking member is used alone as the conductive base material 11, it may be integrated by sticking it to a separately molded base base material 12. When a material obtained by laminating a conductive sticking member on a metal plate or metal foil is used as the conductive base material 11, the base base material 12 is formed on one surface of the metal plate or metal leaf, and then the other surface is formed. A conductive sticking member may be laminated on the surface.

Further, a metal plate or a metal foil is used as the conductive base material 11, and a material partially provided with an adhesive can also be used. The pressure-sensitive adhesive may be a conductive pressure-sensitive adhesive or a non-conductive insulating pressure-sensitive adhesive. Since the metal plate and the metal foil are exposed at the place where the insulating adhesive is not provided, the first object to be connected can be electrically contacted. By using the adhesive, the conductive member 10 can be fixed to the first object to be connected without soldering.

The upper surface 11b of the conductive base material 11 may be provided with a primer that enhances the adhesion to the base base material 12. If the primer is sufficiently thin, it does not interfere with the conductivity between the conductive base material 11 and the stretchable conductive film 13.

The base base material 12 reduces the load (pressing load) when the conductive member 10 is compressed by the metal housing and the circuit board. That is, the base base material 12 has higher flexibility than the conductive base material 11 and the stretchable conductive film 13, and is the portion of the conductive member 10 that is most easily deformed by an external force. When the base base material 12 is compressed in the Z direction by pressing between the metal housing and the circuit board, the base base material 12 is configured to be easily deformable by bulging outward in the X and Y directions. There is.

The base base material 12 has a rectangular parallelepiped shape that is longer in the Y direction than in the X and Z directions. The base base material 12 is provided so as to be stacked on the upper surface 11b of the conductive base material 11. The base base material 12 has a set of exposed side surfaces 12a and 12a as "exposed portions", a set of shielding side surfaces 12b and 12b as "shielding portions", and a base top surface 12c on its surface. ing.

The set of exposed side surfaces 12a and 12a are located at the front end and the rear end of the base base material 12 in the Y direction, respectively. The set of exposed side surfaces 12a and 12a both extend along the XZ plane which is the intersecting direction with respect to the upper surface 11b of the conductive base material 11. The set of exposed side surfaces 12a and 12a are flush with the front end and the rear end of the conductive base material 11, respectively.

The set of shielding side surfaces 12b and 12b are located at the left end and the right end of the base base material 12 in the X direction, respectively. Then, the set of shielding side surfaces 12b and 12b both extend along the YZ plane which is the intersecting direction with respect to the set of exposed side surfaces 12a and 12a. The set of shielding side surfaces 12b and 12b are located inward in the X direction with respect to the left end and the right end of the conductive base material 11, respectively. Therefore, in the conductive base material 11, the upper surface 11b projects outward in the X direction of the set of shielding side surfaces 12b and 12b, that is, to the left and right sides of the base base material 12. It has a set of protrusions 11c and 11c.

The base base material 12 can also be formed so as to cover the entire upper surface 11b of the conductive base material 11. However, the base base material 12 is formed by partially covering the conductive base material 11 so as to leave the protruding portion 11c, thereby providing a contact surface between the conductive base material 11 and the stretchable conductive film 13. Can be done.

The base top surface 12c is located at the upper end of the base base material 12. The base top surface 12c extends along an XY plane that is an intersection direction with respect to both a set of exposed side surfaces 12a and 12a and a set of shielding side surfaces 12b and 12b. When the conductive member 10 is compressed by the metal housing and the circuit board, the set of exposed side surfaces 12a and 12a and the set of shielding side surfaces 12b and 12b do not come into contact with the metal housing and the circuit board. On the other hand, the base top surface 12c is configured to be in contact with the circuit board. Therefore, when compressed into the metal housing and the circuit board, the set of exposed side surfaces 12a and 12a and the set of shielding side surfaces 12b and 12b bulge outward in the X and Y directions. It is a part that deforms. On the other hand, the base base material 12 is a portion that is compressed and deformed in the Z direction on the base top surface 12c when it is compressed into the metal housing and the circuit board.

The stretchable conductive film 13 covers at least a part of the surface of the base base material 12 and conductively connects the upper surface 11b of the conductive base material 11 and the circuit board so as to expand and contract according to the deformation of the base base material 12. It is a thing. The stretchable conductive film 13 has a film shape in which the thickness in the intersecting direction is thinner than the area exposed in a plane on the surface. The stretchable conductive film 13 is configured to be stretchable and deformable together with the compressive deformation of the base base material 12 without tearing when the conductive member 10 is compressed by the metal housing and the circuit board. The stretchable conductive film 13 has a film top portion 13a, a set of film side portions 13b and 13b as "coating portions", and a set of film bottom portions 13c and 13c as "conducting portions".

The film apex 13a is located at the upper end of the stretchable conductive film 13. The film apex 13a extends along the XY plane and covers the base top surface 12c of the base base material 12 from the upper side in the Z direction. The upper side of the film apex 13a in the Z direction, which is opposite to the surface covering the base top surface 12c, is an electrical connection surface with the circuit board.

Here, the base top surface 12c of the base base material 12 is configured so that the circuit board side is a flat surface. The conductive member 10 is also configured such that the electrical connection surface in which the base top surface 12c is covered with the film top 13a is also a flat surface. As described above, in the conductive member 10, since the electrical connection surface is formed as a flat surface, the contact resistance between the conductive member 10 and the circuit board can be reduced. Therefore, when the base top surface 12c is formed of a flat surface, the conductive connection by the conductive member 10 can be stabilized. Further, the electrical connection surface on which the base top surface 12c is formed as a flat surface is used for vacuum holding by a mounter when mounting on a metal housing or the like using an SMT (Surface Mount Technology) device. It can also be used as a suction surface for. The conductive member 10 can also be mounted using an SMT device and soldered and fixed by a reflow method.

The set of membrane side portions 13b and 13b are located between the membrane top portion 13a and the set of membrane bottom portions 13c and 13c, respectively. The set of film side portions 13b and 13b both extend along the YZ plane and cover the set of shielding side surfaces 12b and 12b of the base base material 12 from the outside in the X direction, respectively. The set of film side portions 13b and 13b has a function of conducting conduction between the film top portion 13a and the set of film bottom portions 13c and 13c, respectively, when the conductive member 10 is compressed by the metal housing and the circuit board. have.

A set of film bottoms 13c and 13c are both located at the lower ends of the stretchable conductive film 13. A set of film bottom portions 13c and 13c both extend along the XY plane, and a set of projecting portions 11c and 11c formed on the upper surface 11b of the conductive base material 11 from the upper side in the Z direction, respectively. It is covered. The set of film bottom portions 13c and 13c has a function as a "conducting portion" that makes conductive contact with the set of protruding portions 11c and 11c, respectively.

As described above, the stretchable conductive film 13 continuously connects a set of protrusions 11c and 11c of the upper surface 11b of the conductive base material 11, a set of shielding side surfaces 12b and 12b of the base base material 12, and a base top surface 12c. It has a film shape that covers the surface. The conductive member 10 is configured so that the stretchable conductive film 13 is exposed in all regions in a plan view (top view).

Here, as described above, the base base material 12 has higher flexibility than the stretchable conductive film 13. Therefore, as compared with the "covered portion" in which the base base material 12 is coated with the stretchable conductive film 13, the "exposed portion" in which the base base material 12 is not covered with the stretchable conductive film 13 receives an external force. It is a part that is easily deformed. That is, the base base material 12 can be bulged and deformed with reference to the "covering portion" of the stretchable conductive film 13 by being compressed and deformed by being pressed.

In the conductive member 10, a set of film side portions 13b, 13b covering a set of shielding side surfaces 12b, 12b is configured as a "coating portion", whereas it is a part of the surface of the base base material 12. A set of exposed side surfaces 12a, 12a is configured as an "exposed portion". That is, in the conductive member 10, when the base base material 12 is compressed by the metal housing and the circuit board, the exposed portions (a set of exposed side surfaces 12a, 12a) of the base base material 12 are elastically conductive. It is configured to be deformable so as to easily bulge without being restrained by the film 13. Therefore, in the conductive member 10, the base base material 12 can be softly and elastically deformed. Therefore, in the conductive member 10, for example, when the base base material 12 is compressed by the metal housing and the circuit board, as compared with the configuration in which the entire surface of the base base material 12 is covered with the elastic conductive film 13. The pressing load can be reduced.

Further, in the conductive member 10, the elastic conductive film 13 has an "exposed portion" that does not cover the base base material 12, so that the conductive member 10 is bent as compared with a configuration in which the entire surface of the base base material 12 is covered, for example. It is configured to be easy. Therefore, in the conductive member 10, the base base material 12 is compressed by the metal housing and the circuit board, as compared with the configuration in which the entire surface of the base base material 12 is covered with the elastic conductive film 13, for example. It is possible to reduce the pressing load at the time.

A set of exposed side surfaces 12a, 12a and a set of shielding side surfaces 12b, 12b of the base base material 12 all extend along the Z direction in which the base base material 12 is compressed. It is preferable that the set of exposed side surfaces 12a and 12a and the set of shielding side surfaces 12b and 12b are formed so that the upper side does not expand as compared with the lower side in the intersecting direction with respect to the Z direction.

Therefore, the set of shielding side surfaces 12b, 12b is a surface perpendicular to the bottom surface 11a of the conductive base material 11. As a result, at the lower end of the base base material 12, the angle of the inside corner portion 12d having an inside corner shape in which the YZ plane formed by the set of shielding side surfaces 12b and 12b and the XY plane formed by the protruding portion 11c intersect is a right angle. It has become. In particular, since the inside corner portion 12d is arranged in a recessed position, it becomes difficult to form the stretchable conductive film 13, and bubbles are formed between the base base material 12 and the stretchable conductive film 13. Never. Further, when the base base material 12 is compressed, the base base material 12 is not sandwiched between the elastic conductive films 13 especially in the vicinity of the inside corner portion 12d, so that the pressing load on the conductive member 10 can be reduced.

The exposed set of exposed side surfaces 12a and 12a of the base base material 12 face each other and are perpendicular to the bottom surface 11a of the conductive base material 11. Therefore, when the base base material 12 is compressed in the Z direction, which is the direction perpendicular to the bottom surface 11a, by the metal housing and the circuit board, the set of exposed side surfaces 12a, 12a are moved outward in the Y direction, respectively. It can be efficiently inflated toward. Therefore, in the conductive member 10, the pressing load at the time of compression can be reduced. At this time, for example, the "covering portion" is configured to cover the base base material 12 in a cylindrical shape. As a result, in the conductive member 10, the elastic conductive film 13 covers the entire surface of the base base material 12 along the intersecting direction with respect to the extension direction of the cylinder (that is, the vertical direction (Z direction) of the conductive member 10). It becomes easy to compress and deform, and the pressing load can be reduced.

Further, since the set of exposed side surfaces 12a and 12a are arranged so as to face each other, the pressing load when the conductive member 10 is compressed by the metal housing and the circuit board is applied to the set of exposed side surfaces 12a. , 12a are easily transmitted evenly, and each is easily bulged and deformed.

The base base material 12 is composed of a gel-like member (gel-like cured product) which is a material softer than a rubber-like elastic body. Therefore, when an external force acts on the conductive member 10, the base base material 12 is easily deformed, so that stress is not concentrated on the conductive member 10. Therefore, in the conductive member 10, the pressing load when the base base material 12 is compressed by the metal housing and the circuit board can be reduced as compared with, for example, an EMI countermeasure component made of general rubber. ..

The gel-like member here is a material that can be elastically deformed, that is, an elastic body, which is particularly flexible and can maintain its shape as a base base material 12. Examples of the gel-like member applicable to the base base material 12 include silicone gel, urethane gel, and acrylic gel. Among these, it is preferable to use a silicone gel having heat resistance and a small compression set as the base base material 12. The base base material 12 is not limited by the composition, structure, etc., and may be an elastic body having extremely high flexibility and capable of maintaining its shape, and the base base material 12 is porous such as urethane sponge. You can also use a plaque. However, it is more preferable to use a gel-like member for the base base material 12, which has a lower compression set value than the porous body and is less likely to settle even after long-term use. Further, these materials may not be used alone in the base base material 12, but may be used in combination of two or more kinds.

If the compression set of the base base material 12 exceeds 10%, the elastic force when compressed by the metal housing and the circuit board is insufficient, and it becomes difficult to return to the original shape. Therefore, there is a high possibility that the continuity between the metal housing and the circuit board cannot be maintained. Therefore, the base base material 12 is preferably composed of a compression set of 10% or less. As a result, the dimensional stability of the base base material 12 is ensured, and the elastic force when the base base material 12 is compressed by the metal housing and the circuit board can be maintained.

Here, the compression set is a value obtained under the condition of standing at 70 ° C. at a compression rate of 50% for 24 hours in accordance with JIS K6262: 2013. The smaller the compression set, the more the dimensions of the original shape are maintained.

If the degree of needle insertion of the base base material 12 is less than 30, the effect of reducing the load when compressed by the metal housing and the circuit board tends to be diminished. On the other hand, if the degree of needle insertion of the base base material 12 exceeds 90, it becomes difficult to secure dimensional stability during molding. Therefore, the base base material 12 is preferably composed of a needle insertion degree of 30 to 90. This is sufficiently soft compared to, for example, a base base material 12 made of general rubber. Therefore, as compared with, for example, a base base material 12 made of general rubber, the load when the base base material 12 is compressed by the metal housing and the circuit board can be sufficiently reduced.

Here, the degree of needle insertion conforms to JIS K2220: 2013, and at 25 ° C., a 1/4 cone attached to the consistency meter is dropped onto a sample filled in a pot, and based on the depth of entry for 5 seconds. This is the value obtained. The softer the base base material 12, the deeper the 1/4 cone sinks, so that the degree of needle insertion increases.

Generally, a conductive polymer material such as conductive rubber is prepared by mixing and dispersing metal fine particles, carbon black, etc., which are conductive fillers that impart conductivity, to a base material such as silicone rubber. It is manufactured. However, in the conductive rubber, since the conductive filler having extremely low elasticity is present in the stretchable base material, the soft and easily deformable property of the base material is easily lost.

On the other hand, the conductive member 10 has a stretchable conductive film 13 having conductivity as a member separate from the base base material 12. Therefore, in the conductive member 10, the base base material 12 does not have to have conductivity, and the base base material 12 can be composed of only a non-conductive material. Therefore, in the conductive member 10, the base base material 12 can be configured to be sufficiently soft and easily deformed, and the pressing load when the conductive member 10 is compressed by the metal housing and the circuit board can be reduced. can.

The stretchable conductive film 13 may cover at least a part of the surface of the base base material 12 that is not in contact with the circuit board and the base top surface 12c. The stretchable conductive film 13 is made of a material that does not tear even when compressed and deformed in the vertical direction and has good elongation. For the stretchable conductive film 13, a conductive film-like member containing a conductive powder as a filler in a polymer base material, for example, a polymer-based binder is used.

The stretchable conductive film 13 can be made of a material similar to that of the base base material 12. The "similar material" here means that the polymer base material, which is the base material of the stretchable conductive film 13, has the same bonding structure and functional group as the gel-like member (gel-like cured product), which is the material of the base base material 12. It means that it is a material having. For example, when the base base material 12 is a silicone gel, for example, a silicone polymer which is a material similar to the material of the base base material 12 is used for the stretchable conductive film 13.

In the conductive member 10, since the elastic conductive film 13 that covers the base base material 12 is made of the same material as the base base material 12, the adhesiveness between the base base material 12 and the elastic conductive film 13 is improved. Can be done. Further, since the base base material 12 and the elastic conductive film 13 are made of similar materials, the difference between the elastic modulus of the elastic conductive film 13 and the elastic modulus of the base base material 12 can be reduced. Therefore, the stretchable conductive film 13 can be expanded and contracted following the deforming base base material 12.

Conductive powders include those made of metals and alloys such as gold, silver, copper, nickel, iron and tin, those whose surface is coated with metals and alloys by plating, carbon, graphite, graphene, etc. Conductive materials such as carbon / graphitic ones can be used.

The stretchable conductive film 13 can be configured by containing flake-shaped metal particles in a polymer base material. In the flake-shaped metal particles, the conductivity in the plane direction is likely to be maintained even if the stretchable conductive film 13 is stretched and deformed. Further, in the flake-shaped metal particles, the volume (electrical) resistivity of the stretchable conductive film 13 can be made low even if the filling amount for the polymer base material is relatively small. Therefore, in the conductive member 10, the filling amount of the flake-shaped metal particles in the polymer base material can be reduced, and the difference between the elastic modulus of the elastic conductive film 13 and the elastic modulus of the base base material 12 can be reduced. Can be done. With the flake-shaped metal particles, the change in resistivity when the stretchable conductive film 13 expands and contracts can be reduced. Therefore, it is preferable to use a material having a larger aspect ratio such as a flat shape, a scale shape, a needle shape, and a fiber shape than a spherical shape as the conductive powder.

The flake-shaped metal particles have an aspect ratio of 2 or more, an average particle size of 1 to 50 μm, and can be configured to be oriented along the surface direction of the surface of the stretchable conductive film 13.

In the conductive member 10, since the flake-shaped metal particles have an aspect ratio of 2 or more and an average particle size of 1 to 50 μm, the conductivity in the plane direction can be maintained even if the stretchable conductive film 13 is stretched and deformed. Then, according to this embodiment, since the flake-shaped metal particles are oriented along the surface direction of the surface of the stretchable conductive film 13, the electrical conductivity in the orientation direction can be increased.

Method for manufacturing conductive member 10

Next, a method of manufacturing the conductive member 10 of the present embodiment will be described.

First, a metal such as copper foil is prepared as a material for the conductive base material 11. As the copper foil, a material long in the Y direction is prepared, and the copper foil may be cut to a desired size after the conductive member 10 is formed. Further, a primer may be applied to the upper surface 11b of the conductive base material 11.

Next, a gel-like member is prepared as a material for the base base material 12. The gel-like member is discharged onto the upper surface 11b of the copper foil, and can be formed into a desired shape by a printing method using a stencil such as a metal mask. The shape of the gel-like member may be trapezoidal, semi-cylindrical, or the like, as will be described later as each embodiment, in addition to being rectangular in front view. However, the shape of the gel-like member is preferably a flat base top surface 12c such as a quadrangle in consideration of transportation. Further, it is preferable that the inside corner portion 12d is formed so as to be at a right angle or more. The gel-like member is cured to a desired degree of needle insertion to form the base base material 12. The base base material 12 is formed on the upper surface 11b of the conductive base material 11 with the protruding portion 11c left. The method for forming the base base material 12 is not limited to the metal mask printing method, and may be, for example, coating with a dispense nozzle or mold molding.

Finally, for example, an ink-like conductive composition is prepared as the material of the stretchable conductive film 13. The conductive composition is discharged to the protruding portion 11c of the conductive base material 11, the shielding side surfaces 12b and 12b of the base base material 12, and the base top surface 12c, and is formed into a film shape by, for example, a scraping method using a squeegee. The stretchable conductive film 13 is a film that can be stretched without tearing following the deformation of the base base material 12 when the conductive member 10 is compressed, and can maintain continuity even in such an stretched state. Formed with thickness. As a guideline for the film thickness, it is sufficient that the base base material 12 has a length in the Z direction, that is, a thickness capable of maintaining continuity even when the compressibility at which the height is halved is 50% or more. The method of applying the stretchable conductive film 13 is not limited to the ejection and squeegee method of the ink-like conductive composition, and may be dipping, transfer, or the like.

The stretchable conductive film 13 is formed by curing the ink-like conductive composition. In this way, the conductive member 10 is configured to be conductive between the bottom surface 11a of the conductive base material 11 and the film top 13a of the stretchable conductive film 13.

Then, in the Y direction, the conductive member 10 which is a connection terminal having a low load and low resistance can be obtained by individually cutting the pieces so as to have a desired length.

Second Embodiment [Fig. 2]

Hereinafter, with reference to the drawings, the conductive member 20 as the second embodiment will be mainly described with reference to a portion having a configuration different from that of the above-mentioned conductive member 10. Unless otherwise specified, the conductive member 20 can exert the same effect as the above-mentioned conductive member 10.

The conductive member 20 of the present embodiment has a conductive base material 11, a base base material 22 as a "gel-like elastic body", and a stretchable conductive film 23. The conductive base material 11 is the same for the conductive member 10 and the conductive member 20.

The base base material 22 has a set of shielding side surfaces 22b, 22b as "shielding portions". The set of shielding side surfaces 22b and 22b are different from the set of shielding side surfaces 12b and 12b in the first embodiment in that they are inclined surfaces that spread downward, respectively. The base base material 22 is configured in the same manner as the base base material 12 except for the above.

The stretchable conductive film 23 has a set of film side portions 23b and 23b as "coating portions". Then, the set of film side portions 23b and 23b are along the set of shielding side surfaces 22b and 22b, which are inclined surfaces extending downward, respectively, and the set of film side portions 13b of the first embodiment. It is different from 13b. The stretchable conductive film 23 is configured in the same manner as the stretchable conductive film 13 except for the above.

In the conductive member 20, the angle of the inside corner portion 12d where the set of shielding side surfaces 22b and 22b and the protruding portion 11c intersect at the lower end of the base base material 22 is an obtuse angle larger than a right angle. The conductive member 20 has an arrangement in which the inside corner portion 12d protrudes, so that the elastic conductive film 23 is easier to form than the elastic conductive film 13. Further, when the base base material 22 is compressed, the base base material 22 is less likely to overlap, especially at the inside corner portion 12d, and the pressing load can be further reduced.

Third Embodiment [Fig. 3]

Hereinafter, with reference to the drawings of the conductive member 30 as the third embodiment, a portion having a configuration different from that of the above-mentioned conductive member 10 will be mainly described. That is, unless otherwise specified, the conductive member 30 can exert the same effect as the above-mentioned conductive member 10.

The conductive member 30 of the present embodiment has a conductive base material 11, a base base material 32 as a "gel-like elastic body", and a stretchable conductive film 33. The conductive base material 11 is the same for the conductive member 10 and the conductive member 30.

The base base material 32 has a set of shielding side surfaces 32b, 32b as "shielding portions". The set of shielding side surfaces 32b and 32b has a set of shielding vertical side surfaces 32e and 32e, respectively, and a set of shielding curved side surfaces 32f and 32f. The set of shielding vertical side surfaces 32e and 32e has the same configuration as the set of shielding side surfaces 12b and 12b of the first embodiment. Each of the set of shield curved side surfaces 32f and 32f has a curved shape when viewed from the front, and connects the base top surface 12c and the set of shield vertical side surfaces 32e and 32e. The base base material 32 is configured in the same manner as the base base material 12 except for the above.

The stretchable conductive film 33 has a set of film side portions 33b and 33b as "coating portions". Then, the set of film side portions 33b and 33b covers the set of film vertical side portions 33d and 33d that cover the set of shielding vertical side surfaces 32e and 32e, respectively, and the set of shielding curved side surfaces 32f and 32f. It has a set of membrane curved side portions 33e and 33e. The stretchable conductive film 33 is configured in the same manner as the stretchable conductive film 13 except for the above.

When the conductive member 30 is compressed by the metal housing and the circuit board, the hardness at an initial stage becomes soft. Therefore, the conductive member 30 is more easily deformed than the conductive member 10 at the initial stage of compression, and the pressing load can be reduced.

Fourth Embodiment [Fig. 4]

Hereinafter, with reference to the drawings of the conductive member 40 as the fourth embodiment, a portion having a configuration different from that of the above-mentioned conductive member 30 will be mainly described. That is, unless otherwise specified, the conductive member 40 can exert the same effect as the above-mentioned conductive member 30.

The conductive member 40 of the present embodiment has a conductive base material 11, a base base material 32 as a "gel-like elastic body", and a stretchable conductive film 43. The conductive base material 11 and the base base material 32 are the same in the conductive member 30 and the conductive member 40.

The stretchable conductive film 43 has a set of film side portions 43b and 43b as "coating portions". Then, the set of film side portions 43b and 43b covers the set of film vertical side portions 43d and 43d that cover the set of shielding vertical side surfaces 32e and 32e, respectively, and the set of shielding curved side surfaces 32f and 32f. It has a set of membrane curved side portions 33e and 33e. The film thickness of the set of film vertical side portions 43d and 43d increases from the upper side in the Z direction connected to the set of shielding curved side surfaces 32f and 32f, respectively, toward the lower side on which the conductive base material 11 is arranged. It is configured in. The stretchable conductive film 43 is configured in the same manner as the stretchable conductive film 33 except for the above.

In the conductive member 40, the conductivity of the elastic conductive film 43 and the adhesiveness to the conductive base material 11 are improved as compared with the conductive member 30 in which the film thicknesses of the pair of film vertical side portions 33d and 33d are uniformly formed. Can be stabilized.

Fifth Embodiment [Fig. 5]

Hereinafter, with reference to the drawings of the conductive member 50 as the fifth embodiment, a portion having a configuration different from that of the above-mentioned conductive member 10 will be mainly described. That is, unless otherwise specified, the conductive member 50 can exert the same effect as the above-mentioned conductive member 10.

The conductive member 50 of the present embodiment has a conductive base material 11, a base base material 52 as a "gel-like elastic body", and a stretchable conductive film 53. The conductive base material 11 is the same for the conductive member 10 and the conductive member 50.

The base base material 52 has a shielding semicircular curved surface 52g instead of a set of shielding side surfaces 12b and 12b and a base top surface 12c as "shielding portions". The shielding semicircular curved surface 52g has a semicircular shape when viewed from the front, and both ends of the semicircle are in contact with the upper surface 11b of the conductive base material 11. The base base material 52 is configured in the same manner as the base base material 12 except for the above.

The stretchable conductive film 53 replaces the film top portion 13a and the set of film side portions 13b and 13b with a film semicircular curved surface side portion 53f as a "covering portion" that covers the shielding semicircular curved surface 52 g. Have. Although the stretchable conductive film 53 does not have a film top portion 13a which is a flat surface, a region near the upper end of the film semicircular curved surface side portion 53f in the Z direction is an electrical connection surface with the circuit board. .. The stretchable conductive film 53 is configured in the same manner as the stretchable conductive film 13 except for the above.

When the conductive member 50 is compressed by the metal housing and the circuit board, the hardness at an initial stage becomes soft. Therefore, the conductive member 50 is more easily deformed than the conductive member 10 at the initial stage of compression, and the pressing load can be reduced.

Sixth Embodiment [Fig. 6]

Hereinafter, with reference to the drawings of the conductive member 60 as the sixth embodiment, a portion having a configuration different from that of the above-mentioned conductive member 10 will be mainly described. That is, unless otherwise specified, the conductive member 60 can exert the same effect as the above-mentioned conductive member 10.

The conductive member 60 of the present embodiment has a conductive base material 11, a base base material 62 as a "gel-like elastic body", and a stretchable conductive film 63. The conductive base material 11 is the same for the conductive member 10 and the conductive member 60.

The base base material 62 has a shielding hemispherical curved surface 62h instead of a set of shielding side surfaces 12b and 12b and a base top surface 12c as “shielding portions”. The shielded hemispherical curved surface 62h has a hemispherical shape when viewed from the front, and the lower end of the hemisphere is in contact with the upper surface 11b of the conductive base material 11. The base base material 62 is configured in the same manner as the base base material 12 except for the above.

The stretchable conductive film 63 has a film hemispherical curved surface side portion 63g as a “covering portion” that covers the shielding hemispherical curved surface 62h instead of the film top portion 13a and a set of film side portions 13b and 13b. ing. Although the stretchable conductive film 63 does not have the film top portion 13a which is a flat surface, the region near the upper end in the Z direction of the film hemispherical curved surface side portion 63g is an electrical connection surface with the circuit board. The stretchable conductive film 63 is configured in the same manner as the stretchable conductive film 13 except for the above.

When the conductive member 60 is compressed by the metal housing and the circuit board, the hardness at an initial stage becomes soft. Therefore, the conductive member 60 is more easily deformed than the conductive member 10 at the initial stage of compression, and the pressing load can be reduced.

Seventh Embodiment [Fig. 7]

Hereinafter, the conductive member 70 as the seventh embodiment will be mainly described with reference to the drawings, and a portion having a configuration different from that of the conductive member 30 described above will be described. That is, unless otherwise specified, the conductive member 70 can exert the same effect as the above-mentioned conductive member 30.

The conductive member 70 of the present embodiment has a conductive base material 11, a base base material 72 as a "gel-like elastic body", and a stretchable conductive film 73. The conductive base material 11 is the same for the conductive member 10 and the conductive member 70.

The base base material 72 has a shielding side surface 72b as a "shielding portion" and a non-shielding side surface 72i as an "exposed portion". The combination of the shielding side surface 72b and the non-shielding side surface 72i has the same configuration as the set of shielding side surfaces 32b, 32b of the third embodiment. The shielding side surface 72b has a shielding vertical side surface 72e and a shielding curved side surface 72f. The non-shielding side surface 72i has a non-shielding vertical side surface 72j and a non-shielding curved side surface 72k. The base base material 72 is configured in the same manner as the base base material 32 except for the above.

The stretchable conductive film 73 has a film side portion 73b as a “coating portion”. The film side portion 73b has a film vertical side portion 73d that covers the shielding vertical side surface 72e and a film bending side portion 73e that covers the shielding curved side surface 72f. On the other hand, the non-shielding vertical side surface 72j and the non-shielding curved side surface 72k are not covered with the stretchable conductive film 73. The stretchable conductive film 73 is configured in the same manner as the stretchable conductive film 13 except for the above.

In the conductive member 70, when compressed by the metal housing and the circuit board, not only the set of exposed side surfaces 12a and 12a but also the non-shielding side surface 72i becomes an "exposed portion". Therefore, the set of exposed side surfaces 12a and 12a and the non-shielding side surface 72i are configured to be deformable so as to be easily bulged without being restrained by the stretchable conductive film 73. Therefore, in the conductive member 70, the base base material 72 can be softly and elastically deformed. Therefore, in the conductive member 70, the base base material 72 is compressed by the metal housing and the circuit board, as compared with the configuration in which both of the set of shielding side surfaces 12b and 12b are covered with the elastic conductive film 13, for example. It is possible to reduce the pressing load at the time.

Eighth Embodiment [FIGS. 8 and 9]

Hereinafter, with reference to the drawings of the conductive member 80 as the eighth embodiment, a portion having a configuration different from that of the above-mentioned conductive member 30 will be mainly described. That is, unless otherwise specified, the conductive member 80 can exert the same effect as the above-mentioned conductive member 30.

The conductive member 80 of the present embodiment has a conductive base material 11, a base base material 82 as a "gel-like elastic body", and a stretchable conductive film 33. The conductive base material 11 and the stretchable conductive film 33 are the same in the conductive member 30 and the conductive member 80.

The base base material 82 has a cavity portion 82l that penetrates the base base material 82 along the Y direction in the central region in the Z direction. As a result, the base base material 82 is more likely to be crushed even if the pressing load on the conductive member 80 is smaller than that of the conductive member 30 having the base base material 32 which is solid, for example. Therefore, in the conductive member 80, the pressing load when the base base material 82 is compressed by the metal housing and the circuit board can be further reduced.

The cavity portion 82l of the present embodiment is not limited to the configuration in which the base base material 82 is provided so as to penetrate the center in the Z direction. For example, as shown in FIG. 9, the conductive member 90 is configured to have a conductive base material side cavity portion 91d straddling the conductive base material 91 and the base base material 92, and a base base material side cavity portion 92 m. You may. In this case, the conductive member 90 can be manufactured by preparing a pair of left and right conductive base materials 91 and 91, sandwiching a jig between them, and forming the base base material 92.

The position where the cavity 82l or the like is formed is not limited to the center in the X direction. However, if the cavity portion 82l or the like is formed in the center in the X direction, it is preferable that the base base material 82 is easily crushed without being biased in the X direction when the base base material 82 is compressed by the metal housing and the circuit board. .. Further, the cavity portion 82l or the like does not need to penetrate the base base material 82 in the Y direction. However, if the cavity portion 82l or the like is formed so as to penetrate the base base material 82 in the Y direction, the base base material 82 is particularly biased in the Y direction when the base base material 82 is compressed by the metal housing and the circuit board. It is preferable because it is easily crushed. Further, the conductive member 80 does not have to have a single cavity 82l, and may be configured in combination with, for example, the conductive member 90. The configurations of the conductive member 80 and the conductive member 90 are not limited to the configuration of the third embodiment, and can be combined with all other embodiments.

Ninth Embodiment [FIGS. 10 and 11]

Hereinafter, with reference to the drawings of the conductive member 100 as the ninth embodiment, a portion having a configuration different from that of the above-mentioned conductive member 30 will be mainly described. That is, unless otherwise specified, the conductive member 100 can exert the same effect as the above-mentioned conductive member 30.

The conductive member 100 of the present embodiment has a conductive base material 101, a base base material 32 as a "gel-like elastic body", and a stretchable conductive film 33. The base base material 32 and the elastic conductive film 33 are the same in the conductive member 30 and the conductive member 100.

The conductive base material 101 is provided with an adhesive 101 g for adhesively fixing the conductive member 100 to the metal housing on the lower surface 101f, which is the surface of one side of the metal foil 101e. The pressure-sensitive adhesive 101g may be provided on the entire surface of the lower surface 101f of the metal foil 101e, or may be partially provided. A conductive pressure-sensitive adhesive can be used as the pressure-sensitive adhesive 101 g. The pressure-sensitive adhesive 101 g using the conductive pressure-sensitive adhesive constitutes the bottom surface 101a of the conductive base material 101 that is adhesively fixed to the metal housing, and conducts the metal foil 101e and the metal housing. be able to.

The conductive base material 101 does not need to have both the metal foil 101e and the pressure-sensitive adhesive 101g. The conductive base material 101 may have a configuration in which a conductive adhesive or a conductive adhesive tape as a conductive adhesive member is used alone.

The pressure-sensitive adhesive 101 g of the present embodiment is not limited to the conductive pressure-sensitive adhesive. As shown in FIG. 11, the insulating pressure-sensitive adhesive can also be used by providing the pressure-sensitive adhesive 111 g only partially, for example, on one side in the X direction. In the conductive base material 111 of the conductive member 110 in this case, the pressure-sensitive adhesive 111 g is adhesively fixed to the metal housing, and the lower surface 101f of the exposed metal foil 101e in the portion where the pressure-sensitive adhesive 111 g is not provided is made of metal. Conductive contact with the housing. At this time, if the metal foil 101e and the pressure-sensitive adhesive 111g are formed sufficiently thin, the conductive base material 111 is likely to be in conductive contact with the metal housing, which is preferable.

The position where the pressure-sensitive adhesive 111g is provided is not limited to one side in the X direction, and may be, for example, the center in the X direction. However, when the pressure-sensitive adhesive 111g is formed on one side in the X direction, when the conductive member 110 is compressed by the metal housing and the circuit board, the lower surface 101f of the metal foil 101e is formed without sandwiching the pressure-sensitive adhesive 111g. It is preferable because it is easy to make a conductive contact with the metal housing.

The pressure-sensitive adhesive 101 g and the pressure-sensitive adhesive 111 g are used for temporarily fixing the conductive member 100 and the conductive member 110 to the metal housing, and from this state, the conductive member 100 and the conductive member 110 are soldered to the metal housing by a reflow method. It may be implemented in. As a result, the conductive member 100 and the conductive member 110 can be securely fixed by the metal housing. The pressure-sensitive adhesive 101 g and the pressure-sensitive adhesive 111 g may disappear or remain after soldering. The configurations of the conductive member 100 and the conductive member 110 as described above are not limited to the configuration of the third embodiment, and can be combined with all other embodiments.

10th Embodiment [Fig. 13]

Hereinafter, with reference to the drawings of the conductive member 130 as the tenth embodiment, a portion having a configuration different from that of the above-mentioned conductive member 30 will be mainly described. That is, unless otherwise specified, the conductive member 130 can exert the same effect as the above-mentioned conductive member 30.

The conductive member 130 of the present embodiment has a conductive base material 11, a base base material 32 as a "gel-like elastic body", and a stretchable conductive film 133. The conductive base material 11 and the base base material 32 are the same in the conductive member 30 and the conductive member 130.

The stretchable conductive film 133 has a metal-based conductive film 136 and a stretchable conductive protective film 137. The metal-based conductive film 136 is configured in the same manner as the stretchable conductive film 33 described above. Then, the metal-based conductive film 136 can be configured by containing conductive powder, for example, flake-shaped metal particles in the polymer base material, similarly to the above-mentioned elastic conductive film 13.

The metal conductive film 136 is preferably made of a material similar to that of the base base material 32. Further, the conductive powder has high conductivity such as those made of metals and alloys such as gold, silver, copper, nickel, iron and tin, and those in which the surface is coated with metals and alloys by plating or the like. It is preferable to use a material. The film thickness of the metal-based conductive film 136 is preferably 10 to 150 μm.

As the metal conductive film 136, for example, a conductive film-like member in which flake-shaped silver particles having an average particle size of 1 to 20 μm are mixed with a silicone polymer made of 100 parts by weight of a two-component curable liquid silicone rubber is used. The metal conductive film 136 has, for example, a film thickness of 70 μm and a volume resistivity of 3.10 ^{. -3} Ω · cm.

The stretchable conductive protective film 137 is further laminated on the surface of the metal-based conductive film 136, and is configured to be stretchable and deformable together with the metal-based conductive film 136 according to the compressive deformation of the base base material 32. That is, the stretchable conductive film 133 is a conductive film formed by laminating a metal-based conductive film 136 and a stretchable conductive protective film 137.

The stretchable conductive protective film 137 has a film top portion 137a, a set of film side portions 137b and 137b, and a set of film bottom portions 137c and 137c. The film apex 137a, the film side 137b, and the film bottom 137c are laminated on the outer surfaces of the film apex 13a, the film side 33b, and the film bottom 13c (see FIG. 3), respectively. The set of membrane side portions 137b and 137b includes a set of membrane vertical side portions 137d and 137d covering a set of membrane vertical side portions 33d and 33d (see FIG. 3), respectively, and a set of membrane curved side portions 33e. , 33e (see FIG. 3), and has a set of membrane curved side portions 137e and 137e.

In the conductive member 130, since the elastic conductive protective film 137 has conductivity, it is elastic so as to have conductivity as in the case where the elastic conductive protective film 137 is not laminated on the metal-based conductive film 136. The conductive film 133 can be formed. Further, since the elastic conductive protective film 137 is laminated on the metal conductive film 136, it is possible to protect the metal conductive film 136 from corrosion, oxidation, sulfide, etc. without exposing it and prevent migration. can. Since the stretchable conductive protective film 137 can be stretched and deformed together with the metal-based conductive film 136 according to the compressive deformation of the base base material 32, the stretchable conductive protective film 137 is laminated on the metal-based conductive film 136. The base base material 32 can be softly deformed as in the case where the base material 32 is not provided.

As described above, in the conductive member 130, the stretchable conductive film 133 is composed of a metal-based conductive film 136 having different properties (for example, conductivity and flexibility) and a stretchable conductive protective film 137. Therefore, in the conductive member 130 that conductively connects the first connection object and the second connection object when they are compressed by a low load, the conductivity and flexibility of the metal-based conductive film 136 ( It is possible to prevent aging deterioration due to corrosion etc. while maintaining (low compression load).

The stretchable conductive protective film 137 is configured to contain, for example, a conductive carbon allotrope in the polymer base material. In the conductive member 130 in this case, the outermost layer exposed to the outside of the conductive member 130 and having the highest possibility of deterioration over time such as corrosion is composed of an allotrope of carbon having excellent corrosion resistance and the like. NS. In this way, since the stretchable conductive protective film 137 containing the conductive carbon homogeneity in the polymer base material is laminated on the metal-based conductive film 136, the conductivity of the stretchable conductive film 133 and the flexibility of the conductive member 130 The metal conductive film 136 can be protected from corrosion and the like while maintaining the property. Further, it is possible to construct the conductive member 130 having an excellent design property in which the gloss on the surface of the stretchable conductive film 133 is reduced and a highly uniform black color is exhibited. Since the surface of the elastic conductive protective film 137 contains a large amount of carbon allotropes, the heat resistance and abrasion resistance on the surface of the conductive member 130 can be improved.

The stretchable conductive film 133 has a multi-layer structure having a metal-based conductive film 136 having a high content of metal particles inside and a stretchable conductive protective film 137 having a high content of carbon allotropes on the outside. ..

Since the metal-based conductive film 136, which has higher flexibility and is easier to form than the stretchable conductive protective film 137, is configured to be adjacent to the base base material 32, the stretchable conductive film 133 is formed along with the compressive deformation of the base base material 32. It is possible to prevent peeling, especially between layers, when the material is stretched and deformed. Further, the stretchable conductive film 133 has a multi-layer structure, and the stretchable conductive film 137 has a structure in which carbon homogenes are concentrated, so that the stretchable conductive film 133 has high flexibility and conductivity. A large volume occupied by the metal-based conductive film 136 can be secured. Since the stretchable conductive film 133 has a multi-layer structure and the stretchable conductive protective film 137 does not contain metal particles, the metal particles are not exposed and the metal-based conductive film 136 is oxidized and migrated. It is possible to suppress an increase in the electric resistance value with time.

The carbon allotrope constituting the stretchable conductive protective film 137 generally has a higher volume (electrical) resistivity than a metal. For example, the volume (electrical) resistivity [Ω · cm] of silver is on the order of 10 -6, while the volume (electrical) resistivity [Ω · cm] of carbon is 10 -3. It is an order. However, when the conductive member 130 and the conductive member 30 are compared, the electric resistance value [Ω] when compressed to half the height in the Z direction is that the elastic conductive film 133 and the metallic conductive film 136 It is known that the stretchable conductive film 33, which is configured alone, is equivalent to the stretchable conductive film 33. Since the conductive member 130 is used in a state of being compressed in the Z direction, it has excellent conductivity even in a configuration in which an elastic conductive protective film 137 having an electric resistance value higher than that of the metal conductive film 136 is further laminated. The first connection object and the second connection object can be electrically connected to each other.

The stretchable conductive protective film 137 preferably has a film thickness of 5 to 75 μm, and more preferably has a film thickness of 5 to 50 μm. As described above, when the stretchable conductive protective film 137 has an appropriate film thickness, the metal-based conductive film 136 is corroded while having elasticity, flexibility and conductivity sufficient to bend the stretchable conductive protective film 137. Etc. can be prevented to protect the surface of the conductive member 130. Further, when the stretchable conductive protective film 137 has an appropriate film thickness, it is possible to prevent the metal-based conductive film 136 from being seen through and impart high designability to the conductive member 130.

Examples of the polymer base material applicable to the base material of the stretchable conductive protective film 137 include highly flexible polymers such as silicone-based, urethane-based, acrylic-based, and olefin-based. The stretchable conductive protective film 137 can be made of a material similar to that of the metal-based conductive film 136. At this time, for example, when the metal-based conductive film 136 is a silicone polymer, the silicone polymer is also used as the base polymer of the stretchable conductive protective film 137.

When the stretchable conductive protective film 137 laminated on the metal-based conductive film 136 is made of the same material as the metal-based conductive film 136, the adhesiveness between the metal-based conductive film 136 and the stretchable conductive protective film 137 is enhanced. be able to. Further, since the metal-based conductive film 136 and the stretchable conductive protective film 137 are made of the same material, the difference between the elastic coefficient of the metal-based conductive film 136 and the elastic coefficient of the stretchable conductive protective film 137 is reduced. be able to. Therefore, the stretchable conductive protective film 137 can be stretched and contracted together with the metal-based conductive film 136 that stretches and contracts according to the deforming base base material 32.

The stretchable conductive protective film 137 tends to be harder than the metal-based conductive film 136. Therefore, as the base material of the stretchable conductive protective film 137, a material that is softer than the base material of the metal-based conductive film 136, that is, a material having a large degree of needle insertion may be used. By doing so, the difference between the elastic modulus of the metal-based conductive film 136 and the elastic modulus of the stretchable conductive protective film 137 can be reduced.

The stretchable conductive film 133 is configured by containing a conductive filler in a polymer base material. As the conductive filler of the stretchable conductive protective film 137, a carbon / graphite conductive material such as carbon, graphite, graphene, etc., that is, an allotrope of carbon having conductivity can be used other than the metal type. As the conductive filler, in addition to a spherical shape, a flat shape, a scale shape, a needle shape, a fiber shape, or the like can be used.

The stretchable conductive protective film 137 is a conductive film-like member in which 60 parts by weight of carbon black and 20 parts by weight of multi-layer graphene are mixed with, for example, 100 parts by weight of a silicone polymer made of a two-component curable liquid silicone rubber. Is used. As the carbon black, for example, Mitsubishi Conductive Carbon Black # 3030B manufactured by Mitsubishi Chemical Corporation, which has an arithmetic mean particle size of 55 nm, can be used. As the multilayer graphene, for example, high-purity graphene powder iGurafen-αS of ITEC Co., Ltd. having a particle size of 10 μm can be used.

As described above, the stretchable conductive protective film 137 is preferably configured to contain graphene. Then, it is preferable to use scale-shaped particles as graphene. By orienting the scaly graphene along the surface direction of the surface of the stretchable conductive film 133, the electrical conductivity in the orientation direction can be increased. Similarly, the stretchable conductive protective film 137 is preferably configured to contain conductive carbon black. By interposing the carbon black around the graphene and between the graphenes, it is possible to increase the conductivity in both the surface direction and the thickness direction of the surface of the stretchable conductive protective film 137, and as a result, the stretchable conductive protective film 137 The conductivity can be improved as a whole.

The conductive film-like member containing silicone polymer, carbon black and graphene is heated after being applied with a solution dissolved in a diluting solvent, and the solvent volatilizes to cure the silicone film, resulting in carbon / carbon fiber. / A conductive film containing graphite or the like is formed. The stretchable conductive protective film 137 has, for example, a film thickness of 30 μm and a volume (electrical) resistivity of ^5.10-1 Ω · cm. Since the resistance value of the stretchable conductive protective film 137 is often higher than that of the metal-based conductive film 136, it is preferable that the stretchable conductive protective film 137 is formed to have a thinner film thickness than the metal-based conductive film 136. The conductive film-like member is discharged onto the outer surface of the metal-based conductive film 136 (a portion corresponding to the outer surface of the elastic conductive film 33 of the conductive member 30), and is formed into a film shape by, for example, a scraping method using a squeegee. .. The method of applying the stretchable conductive protective film 137 is not limited to the ejection and squeegee method of the ink-like conductive composition, and may be dipping, transfer, or the like.

The stretchable conductive protective film 137 of this embodiment can also be applied to each of the other embodiments described above and each modification described later.

Modification example [Fig. 12]

Since the conductive member 10 and the like as described above can be deformed, an example thereof will be described.

In the above embodiment, an example is shown in which the conductive base material 11 is simply formed from a material such as a metal, a synthetic resin, or a ceramic. However, the conductive member 120 may further have a chip fixing resistor 125 as an "electric element" constituting the conductive base material 121. The conductive base material 121 can be configured to be electrically connected to the metal housing and the bottom portion 13c of the film such as the stretchable conductive film 13 at the conductive contact portion 125a of the chip fixing resistor 125.

According to the configuration of this modification, the chip fixing resistor 125 having the conductive contact portion 125a in advance can be used as the conductive base material 121. Therefore, the chip fixed resistor 125 as an "electronic element" whose quality characteristics such as dimensions, mechanical characteristics, and electrical characteristics are guaranteed at a predetermined level makes it easy to mass-produce a highly reliable conductive member 120 at low cost. Can be manufactured in. Further, since the chip fixed resistor 125 is less likely to warp, it is possible to stabilize the conduction particularly with the metal housing.

Further, in the above-described embodiment, the stretchable conductive film 13 and the like are continuously formed in the Y direction. However, in the conductive member 10 or the like, the region where the elastic conductive film 13 or the like is formed and the region where the stretchable conductive film 13 or the like is not formed may be alternately arranged so as to form a vertical stripe pattern. As a result, the shielding side surface 12b that is not covered with the film side portion 13b becomes an "exposed portion" and can be bulged and deformed without being restrained by the "covered portion". Therefore, in the conductive member 10 and the like, the base base material 12 and the like can be softly and elastically deformed.

In the "conductive member" disclosed in this application, the configurations shown in the respective embodiments and modifications can be freely combined within a range that does not cause a contradiction. For example, the conductive members 10, 20, 40, 50, 60, 80, 90, 100, 110, 120 and 130 have a non-shielding side surface 72i in which the stretchable conductive film 73 is not coated, as in the seventh embodiment. You may be. The conductive members 10, 20, 50, 60, 70, 80, 90, 100, 110, 120 and 130 are films as "coating portions" whose film thickness increases downward as in the fourth embodiment. It may have a side portion 43b. Further, the conductive members 30, 40, 70, 80, 90, 100, 110 and 130 have a set of shielding side surfaces 22b, 22b which are inclined surfaces extending downward, as in the second embodiment. Is also good. Then, the conductive members 50 and 60 may have a base top surface 12c configured so that the side of the circuit board is a flat surface, as in the first embodiment.

Hereinafter, the conductive member 10 and the like of the present embodiment will be described in more detail and concretely by showing examples. However, this embodiment is not limited to the following examples.

Comparative Example 1

As Comparative Example 1, a sample corresponding to the base base material 12 was prepared. As a sample, silicone rubber having a hardness of A30 measured by a durometer type A measuring instrument conforming to JIS K 6253 was used. The thickness of the sample was set to 1 mm, and five samples of Comparative Example 1 were prepared.

Example 1

In Example 1, the base base material 12 was used as a sample. As the base base material 12, a silicone gel having a liquid temperature of 25 ° C. and a viscosity of 230 Pa · s at 10 rpm and a needle insertion degree of 60 was used. The base base material 12 was produced as a silicone gel molded product by curing at 110 ° C. for 30 minutes. The thickness of the sample was 1 mm, and five samples of Example 1 were prepared.

Comparative Example 2

As Comparative Example 2, five samples in which the stretchable conductive film 13 was laminated on the same sample as in Comparative Example 1 were prepared. The stretchable conductive film 13 contains flake-shaped silver particles of 1 to 20 μm in the silicone polymer so that the volume (electrical) resistivity is ^{3/10 -3 Ω · cm, and the liquid temperature is high.} A silver ink having a viscosity of 80 Pa · s at 25 ° C. and 10 rpm was used. The stretchable conductive film 13 was applied to a set of shielding side surfaces 12b and 12b and a base top surface 12c of the base base material 12. The stretchable conductive film 13 was cured by heating at 90 ° C. for 30 minutes and then at 150 ° C. for 60 minutes. The stretchable conductive film 13 has a thickness of 70 μm.

Example 2

As Example 2, five samples in which the stretchable conductive film 13 was laminated on the same sample as in Example 1 were prepared. The stretchable conductive film 13 was produced in the same manner as in Comparative Example 2.

Nano indentation hardness measurement

The nanoindentation hardness of each sample was measured according to Examples 1 and 2 and Comparative Examples 1 and 2 thus obtained. A nano indenter (manufactured by ELIONIX, ultra-micro indentation hardness tester (ultra-light load type) ENT-2100) was used for the measurement of the nano-indentation hardness. Here, the nanoindentation hardness is determined from the test force in which an indenter is applied to the test surface to make a dent and the surface area of the pressed dent in accordance with ISO14577-1 and JIS Z2255: 2003, and the unit is [ The hardness is N / mm ^2]. In the measurement of nanoindentation hardness, a maximum pushing load (pressing load) of 1 mN, which is a test force, was applied in 10 seconds, so that the pushing speed was 0.1 mN / sec. The measurement results are shown in Table 1.

As shown in Table 1, first, regarding the configuration corresponding to the base base material 12, in Example 1, the nanoindentation hardness is about 1 order smaller than that of Comparative Example 1 (1/15 to 1/9). Degree). This showed that the composition of the base base material 12 of the present embodiment was soft. Next, regarding the configuration in which the elastic conductive film 13 is laminated on the base base material 12, in Example 2, the nanoindentation hardness is at least 1/20, and in some cases 1/100, as compared with Comparative Example 2. Was also a small value. As a result, it was shown that the flexibility is outstanding in the configuration of the laminated body in which the elastic conductive film 13 is applied to the base base material 12 of the present embodiment. In Comparative Example 2, since the silicone rubber had a certain degree of hardness, the effect of the hardness of the stretchable conductive film 13 was likely to occur, whereas in Example 2, the silicone gel was extremely soft. It is considered that the influence of the hardness of the stretchable conductive film 13 was hard to come out.

From the results of the above examples, it was shown that the laminate of the base base material 12 and the stretchable conductive film 13 of the present embodiment is soft and deformable. Therefore, it was shown that the conductive member 10 and the like can be conductively connected with a low load when compressed by the metal housing and the circuit board.

10 Conductive member 11 Conductive base material 11a Bottom surface 11b Top surface 11c Protruding part 12 Base base material 12a Exposed side surface 12b Shielding side surface 12c Base top surface 12d Inside corner 13 Elastic conductive film 13a Film top 13b Film side 13c Film bottom 20 Conductive Member 22 Base base material 22b Shielding side surface 23 Elastic conductive film 23b Film side 30 Conductive member 32 Base base material 32b Shielding side surface 32e Shielding vertical side surface 32f Shielding curved side surface 33 Elastic conductive film 33b Film side part 33d Film vertical side part 33e Curvature side of film 40 Conductive member 43 Elastic conductive film 43b Side of film 43d Vertical side of film 50 Conductive member 52 Base base material 52g Shielding semi-circular curved surface 53 Elastic conductive film 53f Semi-circular curved surface side of film 60 Conductive member 62 Base base material 62h Shielding hemispherical curved surface 63 Stretchable conductive film 63g Film Hemispherical curved surface side 70 Conductive member 72 Base base material 72b Shielding side surface 72e Shielding vertical side surface 72f Shielding curved side surface 72i Non-shielding side surface 72j Non-shielding vertical side surface 72k Non Shielding curved side surface 73 Elastic conductive film 73b Film side 73d Film vertical side 73e Film bending side 80 Conductive member 82 Base base material 82l Cavity 90 Conductive member 91 Conductive base material 91d Conductive base material side Cavity 92 Base Base material 92m Base base material side cavity 100 Conductive member 101 Conductive base material 101a Bottom surface 101e Metal foil 101f Bottom surface 101 g Adhesive agent 110 Conductive member 111 Conductive base material 111 g Adhesive agent 120 Conductive member 121 Conductive base material 125 Chip fixing resistance Instrument 125a Conductive contact part 130 Conductive member 133 Elastic conductive film 136 Metallic conductive film 137 Elastic conductive protective film 137a Film top 137b Film side 137c Film bottom 137d Film vertical side 137e Film bending side X Width direction, left and right direction Y Depth direction, front-back direction (longitudinal direction)
Z height direction, vertical direction

Claims (13)

In the conductive member that conductively connects the first connection object and the second connection object,
A conductive base material that comes into contact with the first object to be connected,
An elastic conductive film having a conductive portion with the conductive base material and in contact with the second connection object,
It has a gel-like elastic body provided between the conductive base material and the stretchable conductive film, and has a gel-like elastic body.
The stretchable conductive film is a conductive member that can be stretched and deformed together with compression deformation of the gel-like elastic body. The stretchable conductive film has a coating portion that covers at least a part of the surface of the gel-like elastic body.
The conductive member according to claim 1, wherein the gel-like elastic body can be bulged and deformed with reference to the coating portion of the stretchable conductive film by being compressed and deformed by being pressed. Further, it has an electric element constituting the conductive base material, and has an electric element.
The conductive member according to claim 1 or 2, wherein the conductive base material conducts with the first connection object and the stretchable conductive film at a conductive contact portion of the electric element. The conductive member according to claim 1 or 2, wherein the conductive base material is a plate-shaped or foil-shaped metal material. The conductive member according to any one of claims 1 to 4, wherein the gel-like elastic body has a needle insertion degree of 30 to 90. The conductive member according to any one of claims 1 to 5, wherein the gel-like elastic body has a flat surface on the side of the second connection object. The conductive member according to any one of claims 1 to 6, wherein the stretchable conductive film is made of a material similar to the gel-like elastic body. The conductive member according to any one of claims 1 to 7, wherein the stretchable conductive film is formed by containing flake-shaped metal particles in a polymer base material. The stretchable conductive film is
A metal-based conductive film composed of flake-shaped metal particles contained in a polymer base material,
6. Conductive member. The conductive member according to claim 9, wherein the stretchable conductive protective film is formed by containing a conductive carbon allotrope in a polymer base material. The conductive member according to claim 9 or 10, wherein the stretchable conductive protective film has a film thickness of 5 to 50 μm. The stretchable conductive protective film is configured to contain graphene, and the graphene is oriented along the surface direction of the surface of the stretchable conductive film. Any one of claims 9 to 11. The conductive member described. 10. Conductive member.

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