KR20100120993A - Solderable electric and elastic contacts - Google Patents

Abstract

PURPOSE: An elastic electric contact terminal capable of electrically interlinking a metal film and a metal layer of an electric conductor body is provided to easily perform soldering operation by forming a lower part of an elastic electric contact terminal applying reflow soldering operation. CONSTITUTION: A heat-proof polymer film(30) of an electric conductive member(50) protects an elastic rubber core(10) by an elastic rubber adhesive(20). A metal layer(40) of the electric conductor body is formed in the rear side of the heat-proof polymer film. The metal layer is exposed by outside. An electric conductive adhesive(60) is adhered on the top of the metal layer. The both ends of the electric conductor body are located in the top of the metal layer. A metal film(70) is laminated on the electric conductive adhesive.

Description

Solderable electric and elastic contacts

The present invention relates to a solderable elastic electrical contact terminal, and more particularly, to a reflow solderable elastic electrical contact terminal by surface mounting.

In general, solderable elastic electrical contact terminals should have good electrical conductivity, excellent elastic recovery, and be able to withstand soldering temperatures. In addition, reflow solderable elastic electrical contact terminals should be designed and manufactured to facilitate surface mounting by vacuum pickup.

For this purpose, conventionally solderable elastic electrical contact terminals are mainly used by pressing a metal sheet such as beryllium copper having good elasticity. However, the electrical contact terminal made of only a metal sheet has a disadvantage in that the dimensions are limited in order to provide proper elasticity, the mold cost is high, and the weight is light, so that the yield is poor when reflow soldering.

Another conventional technique is Korean Patent Registration No. 783588 and 839893 filed by the applicant. According to this patent, an elastic rubber core having a low hardness has a disadvantage in that the yield is poor in reflow soldering operation because it is difficult to reliably and flatly manufacture the bottom of the electrical contact terminal to be reflow soldered due to inaccurate dimensions.

Further, the rubber rubber is not precisely dimensioned, so that both ends of the electrically conductive member to be reflow soldered as shown in FIG. 3 are separated from each other or, although not shown in FIG. 3, are easily overlapped. As described above, the liquid adhesive is separated from the electrically conductive member or overlaps with each other, and thus, the liquid adhesive may be soldered out of the electrically conductive member and not soldered when reflow soldering.

Moreover, in the case of narrow electrical contact terminals, the liquid elastic adhesive sticking out from both ends of the electrically conductive member is formed at the site of the metal layer capable of reflow soldering, which seriously affects the reflow soldering.

In addition, in the case of a product having a small dimension, for example, a product having a width of 3 mm or less, a height of 3 mm or less, and a length of 3 mm or less has a disadvantage in that the yield is poor in reflow soldering due to the light weight and movement in reflow soldering. have.

In addition, it is difficult to manufacture the center of the both ends of the conductive member in the center of the bottom surface of the elastic rubber core, there is a disadvantage that a defect such as lifting phenomenon may occur during reflow soldering.

Another conventional technique is Utility Model No. 390490, filed and registered by the applicant. According to this utility model, an electrically conductive elastic rubber has a disadvantage that it is expensive and its electrical resistance is larger than that of metal.

Accordingly, the present invention is proposed to solve such a problem, and an object of the present invention is to provide a solderable elastic electrical contact terminal having good elasticity, electrical conductivity and soldering strength, and low defect rate during reflow soldering.

In addition, it is to provide an elastic electrical contact terminal that is easy to surface mount and reflow soldering by vacuum pickup.

In addition, it is to provide an elastic electrical contact terminal having a uniform dimension of the portion to be reflow soldered and easy to rework.

In addition, to provide an elastic electrical contact terminal that can be economically manufactured.

The above object, the elastic rubber core; An electrically conductive member comprising a heat resistant polymer film surrounding the elastic rubber core via an elastic rubber adhesive and a solderable metal layer formed on a rear surface of the heat resistant polymer film and exposed to the outside; An electrically conductive adhesive adhered to the metal layer on a surface of which both ends of the electrically conductive member are located; And a metal foil laminated on the electrically conductive adhesive and bonded by the electrically conductive adhesive.

In addition, the above object, the elastic rubber core; An electroconductive member comprising a heat resistant polymer film surrounding the elastic rubber core via an electrically conductive elastic rubber adhesive and a solderable metal layer formed on a rear surface of the heat resistant polymer film and exposed to the outside; The electrically conductive elastic rubber adhesive adhered to the metal layer on the side where both ends of the electrically conductive member are located; And a metal foil laminated on the electrically conductive elastic rubber adhesive and bonded by the electrically conductive elastic rubber adhesive.

Preferably, the elastic rubber core is an electrically insulator.

Preferably, the elastic rubber core is any one of a hollow tube-shaped insulating non-foamed rubber, insulating foam rubber, or a solid insulating foam rubber or insulating non-foamed rubber.

Preferably, the elastic rubber core is continuously produced by extrusion.

Preferably, the elastic rubber core is any one of silicone rubber or synthetic rubber.

Preferably, the elastic rubber adhesive is a silicone rubber adhesive.

Preferably, the elastic rubber adhesive is electrically insulated, but the present invention is not limited thereto, and the elastic rubber adhesive may be electrically conductive in order to electrically bond with the metal foil.

Preferably, the elastic rubber adhesive is formed by bonding a liquid silicone rubber adhesive to the elastic core and the polymer film by curing.

Preferably, the heat resistant polymer film has a thickness of 0.008 mm to 0.04 mm and the material is polyimide (PI).

Preferably, the metal layer may be formed by deposition or plating or a combination thereof, and is preferably formed using at least plating for the thickness of the economical and solderable metal layer.

Preferably, the thickness of the metal layer is 0.001 mm to 0.009 mm.

Preferably, the electrically conductive member may be a flexible copper clad laminate (FCCL).

Preferably, the electrically conductive member maintains its original characteristics before and after soldering, and soldering by solder cream is possible.

Preferably, the electrically conductive adhesive is either a solder or an electrically conductive heat resistant polymer adhesive, or a good electrically conductive solder if good electrical conductivity is desired.

Preferably, the solder is formed by reflow soldering of solder cream.

Preferably, the electrically conductive heat resistant polymer adhesive is a resilient electrically conductive silicone adhesive.

Here, in the case of a narrow electrical contact terminal, the electrically conductive silicone adhesive is the same material as the elastic rubber adhesive interposed between the elastic rubber core and the electrically conductive member.

Preferably, the metal foil is bonded to the lower surface of the electrical contact terminal where the end of the electrically conductive member to be reflow soldered is located.

Preferably, the metal foil is a copper foil having a thickness of 0.01 mm to 0.1 mm on which tin, silver, or gold is plated.

Preferably, the elastic electrical contact terminal is the metal foil reflow soldering.

According to the above configuration, the lower surface of the resilient electrical contact terminal to be reflow soldered is made of a flat metal foil, the dimensional stability is good, the soldering is easy, the yield during reflow soldering is good.

In addition, the metal layer and the metal foil of the electrically conductive member are electrically connected by an electrically conductive adhesive, in particular a solder, so that the electrical contact resistance is small and the adhesive strength is good.

In addition, when the metal layer and the metal foil are bonded with an electrically conductive heat resistant polymer, the re-work is easy since the electrical contact terminals are not melted again by heat after reflow soldering on the printed circuit board.

In addition, in the case of a narrow electrical contact terminal, the metal layer and the metal foil are easily produced because the metal layer and the metal foil are adhered by an electrically conductive elastic rubber adhesive interposed between the elastic rubber core and the electrically conductive member.

In addition, due to the self-weight of the electrically conductive adhesive and the metal foil, the movement is less due to the external influence provided during surface mounting, and thus the yield during reflow soldering is good.

In addition, it uses a thin heat-resistant polymer film and metal layer, an elastic core and an elastic adhesive, so flexibility and elasticity are good.

In addition, since the metal foil is formed on the lower surface of the electrical contact terminal having both ends of the conductive member, it is easy to manufacture and the yield is good when reflow soldering.

In addition, it is easy to distinguish between the top and bottom, and easy packaging by vacuum pickup.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1. First embodiment

1 is a perspective view showing an electrical contact terminal 100 according to an embodiment of the present invention.

As shown, using an insulating foam rubber 10, such as a sponge as the elastic rubber core, the elastic rubber adhesive 20 is located between the insulating foam rubber 10 and the heat-resistant polymer film 30, the insulating foam rubber ( 10) and the heat resistant polymer film 30 is reliably bonded.

In addition, a metal layer 40 is integrally formed on the rear surface of the heat resistant polymer film 30 to form the conductive member 50, and the conductive member 50 may be a single-sided flexible printed circuit board (FCCL), for example. have.

Preferably, the metal layer 40 formed on the rear surface of the heat resistant polymer film 30 may improve the flexibility of the electrical contact terminal 100 by removing a portion of the metal layer 40 by etching, or at least two electrical layers. Patterns can be formed.

In addition, the metal layer 40 of the lower surface on which both ends of the electroconductive member 50 are positioned is bonded to the metal foil 70 with the solder 60 interposed therebetween.

Here, since the lower surface of the elastic rubber core 10 having low hardness and inaccurate dimensions does not form a flat surface reliably, the lower surface of the elastic rubber core 10 is formed into a shape slightly entering the center from both ends, and then the liquid phase By applying an electrically conductive adhesive 60, for example, a solder cream and bonding a flat metal foil 70 thereon, the lower surface to be soldered of the electrical contact terminal 100 can be reliably kept flat.

In addition, the lower surface of the insulating foam rubber 10 is formed in a shape slightly entering from both ends to the center, and the width of the metal foil 70 is formed to be the same or slightly larger than the width of the elastic rubber core 10 and soldered from the outside In view, the solder 60 may not be exposed to the side of the electroconductive member 50 to make it appear to form a single body.

On the contrary, when soldering through a large number of solder creams, the solder 60 is formed to be exposed to a predetermined height of the side surface of the metal layer 40 when viewed from the outside as shown in FIG.

Here, since the dimensions of the foam rubber core 10 are usually inaccurate, the width of the metal foil 70 is approximately equal to or larger than the average dimension of the foam rubber 10.

In this embodiment, although the insulating foam rubber 10 filled with the innermost elastic rubber core is an example, but not limited to this, the elastic rubber core is a hollow tube-shaped non-insulated rubber or insulating foam rubber, or filled with It may be any one of the insulating non-foamed rubber. Preferably, the elastic rubber core 10 may be either silicone rubber or synthetic rubber.

Preferably, the elastic rubber core 10 is continuously produced by extrusion.

FIG. 2 is a perspective view showing the electrical contact terminal 110 when the tubular insulating non-foaming rubber 10a is used as the elastic rubber core. In this case, the pressing rate, restoring force, etc. of the elastic rubber core are determined by the shape and dimensions of the tube cross section.

The cross section of the insulating foam rubber 10 may have a variety of shapes in addition to the above-described quadrangles, preferably at least a portion of the upper surface of the insulating foam rubber 10 to facilitate the vacuum pickup of the electrical contact terminal (100).

The elastic adhesive 20 is formed by curing the liquid silicone rubber adhesive, and at the same time serves as the adhesive and the elastic body. Preferably, the elastic adhesive 20 may be electrically conductive in the case of electrical insulation or a small width of the electrical contact terminal 100.

In general, since the size of the elastic rubber core 10 is not precise, the liquid elastic rubber adhesive 20 interposed between the elastic rubber core 10 and the electrically conductive member 50 may be electrically conductive. Can come out of the end of At this time, the protruding elastic adhesive 20 is not soldered, so an appropriate amount of liquid elastic adhesive should be used.

In addition, as described above, the electrically conductive member 50 may be a flexible flexible metal laminate film (FCCL), and the metal layer 40 is formed on the outer surface of the electrical contact terminal 100 to be electrically conductive.

Here, since the polymer film 30 is used as the electrically conductive member 50, since the liquid silicone rubber adhesive cannot penetrate the polymer film, the liquid silicone rubber adhesive is the elastic rubber core 10 and the polymer film 30. It is hardened | cured by heat in the state intervened in between, and it becomes the elastic rubber adhesive 20.

In particular, the thickness of the metal layer 40 laminated on the outside of the conductive member 50 is between 0.001 and 0.009 mm in consideration of flexibility, and the polymer film 30 is a polyimide (PI) film having good heat resistance. In consideration of the mechanical strength, the thickness is between 0.01 and 0.05 mm.

Preferably, the metal layer 40 may be formed by vapor deposition, plating, or a combination thereof, and is preferably formed using at least plating so as to obtain a thickness of the metal layer which is economically soldered.

In this embodiment, the solder 60 is formed by soldering the solder cream with an electrically conductive adhesive that bonds the metal layer 40 and the metal foil 70. However, the present invention is not limited thereto, and elasticity is used instead of solder. Electroconductive silicone rubber adhesives may be used.

Here, the solder cream or silicone rubber adhesive has an adhesive ability to bond the metal layer 40 and the metal foil 70 when heat is applied, and the electrical contact terminal 100 is applied to another solder cream on the printed circuit board (PCB). Select and use a heat-resistant temperature that can maintain adhesion when reflow soldered.

In addition, the metal foil 70 is a copper foil plated with any one of tin, silver or gold for easy work such as cutting and preventing oxidation. Here, the metal foil 70 cut by slitting and having a constant width is flat and precise in dimension.

The elastic electrical contact terminal 100 manufactured as described above has the following advantages.

First, the electrical contact terminal 100 has good elasticity and flexibility, low electrical resistance and soldering, and preferably reflow soldering by solder cream.

In addition, since the metal foil 70 is precisely and reliably planar, the yield is good and reliable in reflow soldering.

In addition, it is easy to distinguish the top and bottom of the electrical contact terminal 100 by the metal foil 70, reel packaging by vacuum pickup is easy, and the movement during reflow soldering due to the weight of the metal foil 70 and solder 60 little.

In addition, since the metal foil 70 is adhered to the lower surface of the metal layer having both ends of the conductive member 50, even if both ends of the conductive member 50 are not located at the center of the lower surface of the elastic rubber core 10, The contact terminal 100 is capable of reliable reflow soldering.

In addition, since the metal foil 70 is adhered to the lower surface of the metal layer having both ends of the conductive member 50, the elastic leaked from both ends of the conductive member 50 when the electrical contact terminal 100 is reflow soldered It is less affected by the rubber adhesive 20.

In addition, a part of the upper surface of the electrical contact terminal 100 to form a plane, it is easy to pick up the vacuum.

The manufacturing method of the electrical contact terminal 100 having such a structure will be described.

The liquid silicone rubber cured by heat or moisture on the surface of the heat-resistant polymer film 30 having a constant width on which the metal layer 40 is formed on the back surface is already cured on the coating layer while forming a coating layer with a thickness of 0.01 mm to 0.05 mm. The elastic rubber core, for example, insulated foam rubber 10, which is manufactured in a roll form, is placed and wrapped through a jig of a predetermined shape. Preferably, the upper surface of the elastic rubber core 10 may be a vacuum pickup, a predetermined portion is a flat surface, and the lower surface has a structure that slightly recessed from the both ends to the center. At this time, since the size of the elastic rubber core 10 is not precise, the liquid silicone rubber may be squeezed out of the portions having both ends of the electrically conductive member 50 and may be buried on the metal layer 50. The use of a small amount of silicone rubber surplus should also be used, and a separate auxiliary device is used to prevent the surplus from escaping on the metal layer 50.

At this time, if the thickness of the coating layer of the liquid silicone rubber is too thin, the adhesion between the insulating foam rubber 10 and the heat-resistant polymer film 30 is bad, if the thickness of the coating layer is too thick, the liquid silicone rubber is an electrically conductive member (50). There is a disadvantage that it protrudes between both ends of the).

Subsequently, the heat-resistant polymer film 30 wrapped with the insulating foam rubber 10 through the liquid silicone rubber adhesive is placed in a mold having a dimension slightly larger than that of the insulating foam rubber 10 so that When the silicone rubber coating layer is cured, the liquid silicone rubber layer is cured while being converted into an elastic rubber adhesive 20 to have elasticity while acting as an adhesive for bonding the insulating foam rubber 10 and the heat resistant polymer film 30.

At this time, by increasing the temperature of the mold in order to speed up the curing rate of the liquid silicone rubber adhesive can improve the working speed. Moreover, the use of a liquid silicone rubber adhesive cured by heat instead of a liquid silicone rubber adhesive cured by moisture can shorten the curing time.

Since the liquid silicone rubber does not melt again by heat once it is cured, when the metal foil 70 is bonded through the solder cream or the electrically conductive heat-resistant polymer adhesive after curing, the electrical contact terminal 100 is reflowed onto the printed circuit board. Maintains original adhesion even when soldering.

Subsequently, after applying the solder cream on the metal layer 40 of the both ends of the electrically conductive member 50 and then placing the metal foil 70 and applying heat, the metal layer 40 and the metal foil 70 are heated. ) Becomes an electrical contact terminal 100 consisting of a single body bonded by solder 60.

Specifically, while applying a solder cream on the metal layer 40 of the side with the both ends of the electroconductive member 50 to a certain thickness, a constant force is applied to the metal foil 70 having a width equal to or slightly larger than the width of this surface. When it is continuously placed and heated while applying, the solder cream becomes solder 60 in the state interposed between the metal layer 40 and the metal foil 70, thereby making the metal layer 40 and the metal foil 70 reliable. Glue them together.

At this time, in the case of soldering through a lot of solder cream, the solder 60 is formed to be exposed to a certain height of the side of the metal layer 50 when viewed from the outside after soldering is good soldering strength.

By cutting to a certain size to produce a single electrical contact terminal 100 (Bulk) state, and then using a vacuum packaging machine to the reel taping (Reel Taping) the cut electrical contact terminal on a carrier tape (Carrier tape).

The electrical contact terminal 100 manufactured as described above is made of a metal layer 40 having a flexible upper and side surfaces, and a lower surface made of a metal foil 70. The metal layer 40 and the metal foil 70 are solder ( 60) electrically and mechanically connected.

Accordingly, the metal foil 70 makes it easy to distinguish the upper and lower surfaces of the electrical contact terminal 100, so that vacuum pick-up is easy, and in particular, the surface of the metal foil 70 and the solder 60 due to the self-weight of the surface of the vacuum pick-up. It is not easily moved by the wind supplied during surface mounting.

 In addition, the lower surface of the electrical contact terminal 100 is a flat metal foil 70 having precise dimensions, so that the yield is good at the time of reflow soldering, and the upper surface portion of the electrical contact terminal 100 forms a plane to facilitate vacuum pickup. Do. In addition, the metal foil 70 and the metal layer 40 are electrically connected reliably by the solder 60 so that the electrical contact resistance is small.

In this embodiment, since the polyimide is used as the heat-resistant polymer film 30 and the insulating foam rubber 10 and the elastic adhesive 20 are made of silicone rubber, the original performance is maintained before and after soldering. In addition, since the insulating foam rubber 10 or the elastic adhesive 20 is a silicone rubber, it has excellent restoring force and elasticity. In particular, the insulating foam rubber 10 inside is foamed and can be compressed even with a low force.

In addition, the thin heat-resistant polymer film 30 and the metal layer 40 is flexible, and has little effect on the elasticity and the restoring force by the elastic rubber core 10 and the elastic rubber adhesive 20, and thus the elastic electrical contact terminals. Make the 100 have reliable elasticity and flexibility.

2. Second embodiment

3 is a perspective view illustrating an elastic electrical contact terminal 120 according to a second embodiment of the present invention.

Referring to FIG. 3, both ends of the electroconductive member 50 having the metal layer 40 formed thereon are insulated from each other, and a portion of the elastic rubber adhesive 20 is protruded from the isolated portion to the center portion of the lower metal layer 40. Remaining, and solder 60 was formed to a certain height on both sides of the metal layer 40.

The reason why both ends of the electrically conductive member 50 are isolated is that when the electrically conductive member 50 having a predetermined width wraps the elastic rubber core 10 having an inaccurate dimension through a large amount of liquid elastic adhesive. Occurs. That is, Figure 3 is a large amount of liquid silicone rubber adhesive interposed between the elastic rubber core 10 and the polymer film 30, and also because the size of the elastic rubber core 10 is large, the electrically conductive member 50 is elastic rubber This occurs when the core 10 is not sufficiently wrapped.

In addition, the reason why the solder 400 is formed to a certain height on both sides of the metal layer 40 is that the solder between the metal layer 40 and the metal foil 70 when the metal foil 70 is attached to the metal layer 40. This is because the cream is sandwiched and pressed with a lot of force.

Although not shown in the present embodiment, both ends of the conductive member 50 overlap when the width of the conductive member 50 even surrounds the elastic rubber core 10.

As such, when the elastic rubber adhesive 21 protruding from the isolated or overlapping portion of the insulated electrically conductive member 50 is an electrical insulator, the protruding elastic rubber adhesive 21 is formed of the metal layer 40 and the metal foil. Although the adhesive force of 70 is impaired and the electrical coupling is hindered, if the width of the electrical contact terminal 120 is large enough to accommodate it, for example, 3 mm or more is not a big problem.

In addition, when the elastic rubber adhesive 21 protruding from the isolated or overlapping portion of the electrically conductive member 50 is electrically conductive, the adhesive force between the metal layer 40 and the metal foil 70 is deteriorated, but the electrical contact terminal ( If the width of 120 is large enough to accommodate it, for example 3 mm or more is not a big problem. However, in this case, the electrically conductive elastic rubber adhesive has a disadvantage that the price is high and the elasticity is poor.

In addition, the solder 61 or the electrically conductive polymer adhesive formed up to a predetermined height on both sides of the metal layer 40 serves to strengthen the adhesive strength between the metal layer 40 and the metal foil 70.

3. third embodiment;

4 is a perspective view illustrating the elastic electrical contact terminal 130 according to the third embodiment of the present invention.

Referring to FIG. 4, both ends of the electrically conductive member 50 having the metal layer 40 formed thereon are insulated from each other, and a portion of the electrically conductive elastic rubber adhesive 25 sticks out from the isolated portion. And the metal foil 70 are reliably bonded.

Preferably, the width of the lower portion of the elastic rubber core 10 is 3 mm or less.

Preferably, the electrically conductive elastic rubber adhesive 25 is formed by mixing a metal powder, such as copper, with a liquid silicone rubber adhesive and then hardening, and the electrical resistance is 1 ohm or less.

Here, the thickness of the electrically conductive elastic rubber adhesive 22 interposed between the metal layer 40 and the metal foil 70 is made as thin as possible to reduce the electrical contact resistance of the metal layer 40 and the metal foil 70.

As such, the two ends of the electroconductive member 50 are isolated from each other because the electroconductive member 50 having a predetermined width wraps the elastic rubber core 10, which is not precise, through a large amount of liquid elastic adhesive. Occurs when.

As such, the electrically conductive elastic rubber adhesive 26 protruding from the isolated portion of the electrically conductive member 50 separates the lower metal layer 40 and the metal foil 70 from a separate electrically conductive adhesive, eg, solder ( 60) or mechanically adhesive while electrically connecting without an electrically conductive polymer adhesive.

In this case, however, the electrically conductive elastic rubber adhesive is expensive and has a disadvantage in that elasticity is poor. However, the electrically conductive elastic rubber adhesive is suitable in the case of the electrical contact terminal 130 having a small dimension of 3 mm or less in width.

That is, when the width of the lower surface of the elastic rubber core 10 is 3 mm or less, the liquid that protrudes when the elastic rubber core 10 is wrapped with the electroconductive elastic rubber adhesive 25 through the liquid conductive member 50. By using the elastic rubber adhesive 26 of the metal layer 40 and the metal foil 70 can be bonded without a separate electrically conductive adhesive, for example solder cream.

In the above embodiment, it has been described as being defined as an elastic electrical contact terminal, but may be defined as a gasket when it has an electrical attenuation effect, in which case the solderable elastic viscous contact terminal is a solderable gasket.

In the above description, the embodiment of the present invention has been described, but various changes or modifications can be made at the level of those skilled in the art. Such changes and modifications may be said to belong to the present invention without departing from the scope of the present invention, and therefore, the scope of the present invention should be judged by the claims described below.

1 is a perspective view showing an electrical contact terminal 100 according to an embodiment of the present invention.

2 is a perspective view illustrating an electrical contact terminal 110 according to a modification of FIG. 1.

3 is a perspective view illustrating an electrical contact terminal 120 according to another embodiment of the present invention.

4 is a perspective view illustrating an electrical contact terminal 130 according to another embodiment of the present invention.

Claims (12)

Elastic rubber core; An electrically conductive member comprising a heat resistant polymer film surrounding the elastic rubber core via an elastic rubber adhesive and a solderable metal layer formed on a rear surface of the heat resistant polymer film and exposed to the outside; An electrically conductive adhesive adhered to the metal layer on a surface of which both ends of the electrically conductive member are located; And And a metal foil laminated on the electrically conductive adhesive and bonded by the electrically conductive adhesive. Elastic rubber core; An electrically conductive member comprising a heat resistant polymer film surrounding the elastic rubber core via a first electrically conductive elastic rubber adhesive and a solderable metal layer formed on a rear surface of the heat resistant polymer film and exposed to the outside; A second electrically conductive elastic rubber adhesive adhered to the metal layer on a surface where both ends of the electrically conductive member are located; And And a metal foil laminated on the second electrically conductive elastic rubber adhesive and bonded by the second electrically conductive elastic rubber adhesive. The method according to claim 1 or 2, Solderable elastic electrical contact terminal, characterized in that the surface of the elastic rubber core corresponding to the surface on which both ends of the conductive member is formed in a recessed shape from both ends to the center. The method according to claim 1, The electrically conductive adhesive is solderable elastic electrical contact terminal, characterized in that any one of a solder or a heat-resistant silicone rubber adhesive by solder cream. The method according to claim 1, The electrically conductive adhesive is solderable elastic electrical contact terminal, characterized in that formed on both sides of the metal layer to a certain height. The method according to claim 1 or 2, The elastic rubber adhesive is a solderable elastic electrical contact terminal, characterized in that the liquid silicone rubber is formed by curing. The method according to claim 1 or 2, The electroconductive member is a solderable elastic electrical contact terminal, characterized in that a metal layer capable of soldering by plating at least on one side of the polyimide film. The method according to claim 1 or 2, The elastic electrical contact terminal is solderable elastic electrical contact terminal, characterized in that the surface mounting by vacuum pick-up and reflow soldering by solder cream. The method according to claim 1 or 2, And the bonding is performed by heat. The method according to claim 2, The elastic electrical contact terminal is solderable elastic electrical contact terminal, characterized in that less than 3mm in width. The method according to claim 2, And wherein the second electrically conductive elastic rubber adhesive is part of the first electrically conductive adhesive that protrudes between both ends of the electrically conductive member. Elastic rubber core; An electrically conductive member comprising a heat resistant polymer film surrounding the elastic rubber core via an elastic rubber adhesive and a solderable metal layer formed on a rear surface of the heat resistant polymer film and exposed to the outside; And And a metal foil adhered to the metal layer on the surface of which both ends of the electroconductive member are disposed through solder cream.

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