JP6121583B2 - Elastic electrical contact terminal - Google Patents

Description

  The present invention relates to an elastic electrical contact terminal.

  In general, an elastic electrical contact terminal capable of soldering should have high electrical conductivity and elastic recovery and should withstand the temperature during soldering. As an example of the elastic electrical contact terminal, Patent Document 1 by the present inventor discloses that an insulating foam rubber having a constant volume, an insulating non-foaming adhesive layer that adheres while wrapping the insulating foam rubber, and one surface of the insulating non-foam adhesive A heat-resisting polymer film bonded to the insulating non-foamed adhesive layer so as to wrap the layer and having a metal layer integrally formed on the other surface, and disclosed as a solderable elastic electrical contact terminal To do.

  Patent Document 2 discloses an insulating elastic heat-resistant rubber core having a through-hole formed in the length direction, an insulating heat-resistant adhesive layer that adheres while wrapping the insulating elastic heat-resistant rubber core, and one surface of the insulating heat-resistant adhesive. A heat-resistant polymer film that is bonded to the insulating heat-resistant adhesive layer so as to wrap the layer, and a metal layer is integrally formed on the other surface, and the polymer film has the insulating heat-resistant adhesive layer separated from each other at both ends. An elastic electrical contact terminal capable of reflow soldering is disclosed, wherein the bottom surface of the insulating elastic heat-resistant rubber core is inclined to form a concave shape from both ends in the width direction toward an intermediate portion. .

Korean Patent No. 785588 Specification Korean Patent No. 1001354 Specification

  In the case of an electrical contact terminal having the structure as described above, the core is usually elastic by forming a through hole along the length direction inside the core or by manufacturing the core itself in a tube shape, As a result, the electrical contact terminal elastically supports the object.

  However, when the electrical contact terminal has a small size of 0.5 mm or less, it is difficult not only to form a through hole but also to produce a tube, and there is a problem that efficiency is lowered.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a new and improved elastic electric contact terminal having a structure suitable for small size of a certain height or less. Is to provide.

  In order to solve the above-described problem, according to an aspect of the present invention, at least one channel is recessed downward from an upper surface, having a constant width and depth, and extending along a length direction. A polymer film that is adhered while wrapping the elastic core through an adhesive layer, and a solderable metal layer that is adhered while wrapping the polymer film, and the polymer. An elastic electrical contact terminal is provided, characterized in that the film crosses over the channel and onto the side walls of the channel so that the side walls of the channel elastically support the object.

  A plurality of the channels may be formed, and a support wall that protrudes at a height corresponding to the side walls and extends in the length direction may be further provided between the channels.

  The shape of the vertical cross section of the support wall may be a trapezoid that becomes thinner toward the upper end.

  The side surfaces of the both side walls on the channel side may be inclined, so that the both side walls may be inclined toward the channel side when the object is pressurized.

  The upper surface of the support wall may be bonded to the polymer film via the adhesive layer.

  The metal layer may include a copper foil and a metal plating layer that wraps the surface and side surfaces of the copper foil, and the side surface of the copper foil may include both a cut surface in the length direction and a cross section in the width direction.

  The copper foil is thicker than the metal plating layer, the copper foil is an electrolytic copper foil or a rolled copper foil, and a liquid polymer corresponding to the polymer film is applied and cured on the copper foil. By doing so, it may be adhered to the polymer film or may be adhered to the polymer film via the adhesive layer.

  The metal plating layer may be formed by electroless plating.

  In order to solve the above-described problem, according to another aspect of the present invention, at least one channel recessed downward from the upper surface, having a constant width and depth, and extending along the length direction. An electrically conductive elastic rubber coating layer adhered to the outer surface of the elastic core, and a solderable metal foil adhered to the lower surface of the electrically conductive elastic rubber coating layer. An elastic electric contact terminal is provided, wherein both side walls of the channel elastically support the object.

  The width of the electrical contact terminal may be greater than the length of the electrical contact terminal.

  The electrical contact terminal may be soldered to a conductive pattern of a circuit board with a solder cream, and may be electrically connected to an opposing electrical transmission object with elasticity.

  As described above, according to the present invention, it is possible to provide an elastic electrical contact terminal having a structure suitable for small size of a certain height or less.

It is a figure which shows the electrical contact terminal by one Example of this invention. It is a figure which shows operation | movement of the electrical contact terminal by one Example of this invention. It is a perspective view which shows the electrical contact terminal by the other Example of this invention. It is a front view which shows the electrical contact terminal by the other Example of this invention. It is a figure which shows the electrical contact terminal by the other Example of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an electrical contact terminal according to an embodiment of the present invention, and FIG. 2 shows an operation of the electrical contact terminal according to an embodiment of the present invention.

  The electrical contact terminal 100 is interposed between the circuit board and the electrically conductive object 10 and serves to be electrically connected. For example, the electrical contact terminal 100 is forcibly sandwiched between the conductive pattern of the circuit board and the electrically conductive object or is soldered to the conductive pattern of the circuit board with a solder cream to face the electrical contact terminal 100. It is installed so as to be in elastic contact with the conductive object 10.

  In the case of reflow soldering, the electrical contact terminal 100 is supplied by being reel-taped to a carrier, and reflow soldering is performed using a vacuum pickup and a solder cream. Referring to FIG. 1, an electrical contact terminal 100 is formed by being recessed with a constant width and length downward from an upper surface, and having an elastic core 110 having at least one channel 112 extending along a length direction. It includes a polymer film 130 that is adhered while enclosing the elastic core 110 with the agent layer 120 interposed therebetween, and a solderable metal layer 140 that is adhered while enclosing the polymer film 130. According to one embodiment of the present invention, the side walls 114 and 116 of the channel 112 elastically support an object located above.

  Hereinafter, a detailed structure of the electrical contact terminal 100 according to an embodiment of the present invention will be described in detail.

<1.1. Elastic Core 110>
The rubber-made elastic core 110 has heat resistance and elasticity, but is preferably electrically insulating. As a result, the rubber-made elastic core 110 may be non-foamed silicone rubber or foamed rubber, for example, sponge, which satisfies reflow soldering and elastic conditions, but is limited to non-foamed silicone rubber or foamed rubber. Absent.

  The elastic core 110 is manufactured, for example, by an extruding process, and is formed in a symmetric state so as to be balanced in the horizontal direction during soldering, so that reflow soldering with a solder cream is performed. , Can reduce the floating phenomenon and tilt phenomenon.

  The elastic core 110 is formed of a single body, and is formed with a channel 112 having a constant width and depth that is recessed downward from the upper surface and extends along the length direction. As a result, side walls 114 and 116 are formed on both sides of the channel 112 to come into contact with and support the object located above. The elastic core 110 is formed in a small size. For example, the width is 2 mm, the height is 0.5 mm, and the length is 1 mm, but the width is 2 mm, the height is 0.5 mm, and the length is 1 mm. Alternatively, it may correspond to a size of 2 mm in width, 0.5 mm in height, and 1 mm in length, or may be smaller.

  As described above, in the case of the elastic core 110 having the above-described size, when the through-hole is formed inside the elastic core 110 as in the related art or the elastic core 110 itself is manufactured in a tube shape, the elastic core 110 is used. It was difficult to make the height of 0.7 mm or less. However, in one embodiment of the present invention, it is only necessary to form a channel 112 having a constant width and depth that is recessed downward from the upper surface and extending in the length direction. The contact terminal 100 can be easily manufactured.

  When the cross sections of the side walls 114 and 116 are viewed, the side walls 114 and 116 are formed in a shape in which the upper end outside is rounded. Since the upper end outside of the side walls 114 and 116 is formed in a rounded shape, the completed electrical contact terminal 100 is soldered to a printed circuit board or the like and then pressed by an opposing object. When pushing, it is easily pushed inward to prevent external objects from hitting the corners on both sides.

  The side surfaces of the side walls 114 and 116 on the side of the channel 112, that is, the inner side surfaces are vertical or inclined so as to incline toward the channel 112 side. Here, as shown in FIG. 2B, when the inner surface is inclined so as to be inclined toward the channel 112, the side walls 114 and 116 are likely to be inclined toward the channel 112 when being pressurized by the object 10. The force applied by the object 10 can be reduced.

  The lower surface of the elastic core 110 is formed to be inclined so as to be recessed from both ends toward the intermediate portion in the width direction. In other words, when the elastic core 110 is cut vertically, the lower surface of the elastic core 110 is inclined from both corners in the width direction toward the center portion of the lower surface so that the hypotenuse of the isosceles triangle of the lower surface of the elastic core 110 is formed. It is formed so as to be inclined in a concave shape. Although the inclination angle is not particularly limited, a space that does not affect soldering may be formed in the lower portion of the lower surface of the elastic core 110 by accommodating the adhesive leaking from the adhesive layer 120.

  Since the lower surface of the elastic core 110 has a shape that is recessed from both ends toward the middle portion, both sides of the lower surface of the electrical contact terminal 100 are uniformly contacted with the molten solder during reflow soldering, and only one of the lower surfaces is soldered. Can be prevented. In addition, since the lower surface of the elastic core 110 has a shape that is recessed from both ends toward the middle portion, a space for accommodating an adhesive leaking from the adhesive layer 120 to the outside is provided during the manufacturing process, and reflow soldering is performed. In addition, the frequency of occurrence of a phenomenon in which soldering is not performed is minimized.

<1.2. Adhesive layer 120>
The adhesive layer 120 has flexibility, elasticity, and insulation. When the electrical contact terminal 100 is applied to reflow soldering, the adhesive layer 120 has heat resistance. The adhesive layer 120 is located between the elastic core 110 and the polymer film 130 and adheres the elastic core 110 and the polymer film 130 well.

  The adhesive layer 120 is formed, for example, by thermally curing liquid silicone rubber. After the liquid silicone rubber is cured and bonded to the opposing object, and the liquid silicone rubber is cured, a solid phase adhesive layer 120 is formed. The liquid silicone rubber maintains elasticity after being cured, and maintains adhesive strength without melting even when heat is applied. Therefore, the liquid silicone rubber also maintains adhesive strength during soldering. The adhesive layer 120 is formed by curing a self-adhesive silicone rubber adhesive, and the thickness of the adhesive layer 120 is preferably approximately 0.005 mm to 0.03 mm.

<1.3. Polymer film 130>
The polymer film 130 may be, for example, a polyimide (PI) film having high heat resistance or another heat resistant polymer film, and the thickness of the polymer film 130 is determined in consideration of flexibility and mechanical strength. The polymer film 130 is a polymer film that is usually used for a flexible flexible circuit board. As an example, the polymer film 130 is formed by curing after a liquid polymer is cast, and the thickness of the cured polymer film 130 is 0.007 mm to 0.030 mm.

<1.4. Metal layer 140>
The metal layer 140 is adhesively formed so that one surface wraps the polymer film 130. For example, the metal layer 140 is formed by forming a metal plating layer 142 by plating on a copper layer 141. Since the metal plating layer 142 conducts electricity better than the copper layer 141, the metal plating layer 142 is better soldered. According to one embodiment of the present invention, the metal plating layer 142 is formed on all exposed surfaces of the copper layer 141. Here, the exposed surface includes the outer surface of the copper layer 141, that is, the surface and the side surface. Referring to FIG. 1, the surface of the copper layer 141 refers to the outer surface identified with the naked eye from the outside, and the side surface refers to both a cut surface cut in the length direction and a cross section in the width direction.

  Here, the copper layer 141 is an electrolytic copper foil, a rolled copper foil, or a copper plating layer formed on the sputtered tungsten after sputtering tungsten as a seed on one surface of the polymer film. . Hereinafter, for convenience of explanation, the copper layer 141 will be described by taking a copper foil as an example. The thickness of the copper foil 141 is about 10 μm, and the thickness of the copper plating layer is thinned to about 3 μm.

  It should be noted that the metal plating layer 142 is less corrosive than the copper foil 141, and the thickness of the copper foil 141 is thicker than the thickness of the metal plating layer 142. In order for the metal layer 140 to be wrapped and adhered to the polymer film 130, the copper foil 141 is adhered to the polymer film 130 with an adhesive interposed therebetween, or the copper foil 141 corresponds to the polymer film 130. The liquid polymer to be applied is applied and cured to bond the copper foil 141. The metal plating layer 142 is formed by plating tin (Sn) or silver (Ag), or is formed by plating tin (Sn) or gold (Au) after nickel (Ni) plating. In the case of tin or silver, the thickness is approximately 2 μm. In the case of nickel / gold, the thickness of nickel and gold is preferably 1 μm or less.

  Therefore, the metal layer 140 including the metal plating layer 142 is laminated on the polymer film 130 so that the electrical contact terminal 100 conducts electricity well and is soldered well, and prevents the copper foil 141 from being corroded. To do.

  In addition, since the copper foil 141 is exposed to the outside as it is on the cut surface formed by cutting in the process of manufacturing the electrical contact terminal 100, it is necessary to prevent corrosion of the cut surface of the copper foil 141. In order to prevent corrosion of the copper foil 141 on the cut surface, the metal plating layer 142 is formed on the copper foil 141 exposed from the cut surface of the electrical contact terminal 100 as shown in the enlarged view in the circle of FIG. It is formed and covers the copper foil 141. That is, referring to FIG. 1, it can be seen that the boundary between the copper foil 141 and the metal plating layer 142 is indicated by a dotted line, and the copper foil 141 on the cut surface is covered with the metal plating layer 142.

  Therefore, conventionally, because the copper foil is exposed to the outside from the cut surface formed by cutting, in the reliability test such as the salt water test, the salt water contacts the exposed copper foil, and the copper foil corrodes. Either the salt water test was not passed or the exposed copper foil was rusted during use, and the reliability was lowered. However, according to the present invention, the copper foil 141 exposed from the cut surface is covered with the metal plating layer 142, and as a result, contact with salt water in the reliability test can be prevented, and the copper foil 141 can be used even during use. Is not exposed and there is no risk of rusting, improving reliability.

  Further, during reflow soldering, the solder cream spreads better on the copper plating layer 142 formed so as to cover the copper foil 141 with the cut surface, so that the strength of soldering is increased, particularly in the cut surface. The strength of soldering is improved. In particular, when the width of the electrical contact terminal 100 is longer than the length, the strength of soldering at the cut surface is very important. Therefore, the present invention is very useful when the width of the electrical contact terminal 100 is longer than the length. It is.

  In order to manufacture the electrical contact terminal 100 according to an embodiment of the present invention, the elastic core 110 is wrapped with a polymer film 130 having a copper foil 141 bonded on one side and a liquid adhesive layer 120 interposed therebetween. The contact terminal bar to be cut is cut to a certain length. As an example, the contact terminal bar has a length of about 500 mm.

  Next, the contact terminal bar is cut to a length desired by the customer, for example, about 3 mm to form a contact terminal, and as described above, tin or silver is covered so as to cover the exposed surface of the copper foil 141 of the contact terminal. Alternatively, a metal plating layer 142 plated with nickel / gold is formed to manufacture the final electrical contact terminal 100.

  Here, since the elastic core 110 is made of a silicone rubber material, the specific gravity of the electrical contact terminal 100 is smaller than the specific gravity of water. Therefore, although the metal plating layer 142 is formed using electroless plating in a bulk method, the electroplating may be applied without being limited to electroless plating.

  In particular, when the metal plating layer 142 is formed by electroless plating, the surface of the metal plating layer 142 becomes rough, so that the adhesion between the metal plating layer 142 and the solder cream is improved, and the soldering strength is increased. .

  As described above, the elastic core 110 is made of non-foamed silicone rubber or foamed rubber, for example, sponge, the adhesive layer 120 is formed by thermosetting liquid silicone rubber, and the polymer film 130 is made of polyimide film. Therefore, the metal plating layer 142 is formed on the cut surface by the plating process.

  As described above, in the electrical contact terminal 100, the metal plating layer 142 is formed on all the copper foils 141 exposed to the outside including both the surface, the cut surface in the length direction, and both cross sections in the width direction. Thus, the copper foil 141 is blocked from the outside.

  Referring to FIG. 2B, when the electrical contact terminal 100 of the object 10 is pressed, both side walls 114 and 116 are displaced inward while being pressed against the object 10. In FIG. 2B, both side walls 114a and 116a displaced for distinction are indicated by dotted lines.

  At this time, as described above, the side surfaces of the side walls 114 and 116 on the side of the channel 112, that is, the inner side surface is inclined so as to incline toward the channel 112 side. Since 116 is easily pushed to the channel 112 side, the force pushing the object 10 becomes small.

  3 shows an electrical contact terminal according to another embodiment of the present invention, FIG. 3A is a perspective view, and FIG. 3B is a front view.

  In the elastic core 210 of the electrical contact terminal 200, a pair of channels 211 and 212 having a constant width and depth are formed to be recessed downward from the upper surface and extend in the length direction. A support wall 218 is formed between the channels 211 and 212.

  As in the embodiment, the polymer film 230 is bonded while wrapping the elastic core 210 with the adhesive layer 220 interposed therebetween, and the solderable metal layer 240 is bonded while wrapping the polymer film 230.

According to the embodiment of FIG. 3, the side walls 214, 216 and the support walls 218 of the channels 211, 212 elastically support the object located above.
Compared with the embodiment of FIG. 1, the embodiment of FIG. 3 differs in the configuration of the elastic core 210 and the metal layer 240, so only the differences will be described.

  The elastic core 210 is formed of a single body, and a pair of channels 211 and 212 having a certain width and depth are recessed from the upper surface and spaced apart to extend along the length direction. A support wall 218 having substantially the same height as the side walls 214 and 216 is formed between the channels 211 and 212.

  Referring to FIG. 3B, the bottoms of the channels 211 and 212 are inclined like the lower surface of the elastic core 210 and are inclined upward as they go inward from the outer corners of the bottom. According to the structure described above, the side walls 214 and 216 are formed outside the channels 211 and 212, respectively, and the support wall 218 is formed inside, and the object 10 to be pressurized is supported by the side walls 214 and 216. Supported by a wall 218.

  The upper surface of the support wall 218 is adhered to the polymer film 230 via the adhesive layer 220 like the other part of the elastic core 210, thereby preventing the polymer film 230 from floating. The cross-sectional shape of the support wall 218 is not particularly limited. For example, the cross-sectional shape of the support wall 218 may be a trapezoid whose size decreases toward the upper surface, and both corners of the upper end of the cross-sectional shape of the support wall 218 may be rounded.

  As in the first embodiment, the side walls 214 and 216 are formed in a shape in which the outer side of the upper end is rounded when viewed from the cross section. The outer sides of the upper ends of the side walls 214 and 216 are rounded, so that the completed electrical contact terminal 200 is soldered to a printed circuit board or the like and then inward when pressed by the opposing object 10. It can be easily pushed and external objects are prevented from hitting the corners on both sides.

  According to one embodiment of the present invention, a support wall 218 formed between a pair of channels 211, 212 supports a polymer film 230 that passes over the support wall 218, so that the channel is not pressurized by the object 10. No traces of the object 10 remain on 211, 212.

  In addition, although an example is given in which a pair of channels 211 and 212 are formed, a large number of channels may be formed. Of course, if multiple channels are formed, multiple support walls 218 can be formed between the channels.

Openings 242 that are formed at regular intervals along the length direction and extend in the height direction are formed on both side surfaces of the metal layer 240, and the polymer film 230 is exposed through the openings 242.
Here, the side surface means a region including a part to be soldered and including a part from a lower end to an upper end excluding a part to be vacuum picked up on the upper surface.

  The opening 242 is formed by, for example, removing a corresponding portion of the metal layer 240 by etching, and the width, length, and separation distance of the opening 242 are appropriately adjusted. In particular, since the openings 242 are formed symmetrically on both side surfaces, the left and right soldering strengths can be equalized during soldering.

  When the lower end of the opening 242 overlaps with the portion covered by the solder during soldering, the molten solder comes into contact with the polymer film 230 that is not soldered through the opening 242 at the overlapping portion, so that the lead is substantially lead. Can be prevented from rising. In other words, when the electrical contact terminal 200 is soldered to the circuit board, the opening 242 can minimize the rise of the molten solder along the side surface of the metal layer 240.

  By preventing the molten solder from rising along the metal layer 240, the elastic restoring force of the electrical contact terminal 200 is prevented from decreasing. Further, in the low electrical contact terminal 200 having a height of about 0.5 mm or less, the force that pushes the electrical contact terminal 200 is greatly affected by the height at which lead rises. The force pushing the electric contact terminal 200 can be greatly reduced.

  FIG. 4 shows an electrical contact terminal according to another embodiment of the present invention. The electrical contact terminal 300 includes an elastic core 310, an electrically conductive elastic rubber coating layer 340 that encloses the elastic core 310, and a metal foil 350 that is bonded to the lower surface of the electrically conductive elastic rubber coating layer 340.

  The electrically conductive elastic rubber coating layer 340 is formed by coating a liquid elastic rubber with a material obtained by uniformly mixing, for example, a metal powder of 50 μm or less on the outside of the elastic core 310 with the same thickness through a mold, and then curing. Is formed.

  The electrically conductive elastic rubber coating layer 340 preferably has a hardness of Shore A 40 to 70, an electrical resistance of 1Ω or less, and a coating thickness of 10 to 40 μm. The thickness of the metal foil 350 is preferably 8 to 200 μm or less. Further, although copper is used as the metal material of the metal foil 350, corrosion may be prevented or soldering may be performed by further coating with gold or bell as necessary.

  The elastic core 310 is continuously produced by an extruding and curing process. The elastic core 310 is produced by coating the outer surface of the elastic core 310 with a material obtained by mixing metal powder into liquid electrically conductive elastic rubber and curing it, and supplying a copper foil 350 on the lower surface in the length direction. . By curing the liquid electrically conductive liquid rubber, an electrically conductive elastic rubber coating layer 340 is formed, and at the same time, the electrically conductive elastic rubber coating layer 340 and the copper foil 350 are mechanically and electrically joined.

  As in the previous embodiment, it is difficult to form a through hole in the elastic core or to manufacture the elastic core itself in a tube shape. Forming at least one channel having a constant width and depth along the length from the bottom to elastically deform the object using side walls on both sides of the channel and support walls formed between the channels To support.

  In the above embodiment, the case where the electrical contact terminals 100, 200, 300 are soldered to the conductive pattern of the circuit board with the solder cream and contact with the opposing electrically conductive object is described as an example. The electrical contact terminals 100, 200, and 300 are not limited to the embodiment, and may be installed by being forcibly sandwiched between the conductive pattern of the circuit board and the electrically conductive object as described above. When the electrical contact terminals 100, 200, 300 are forcibly sandwiched between the conductive pattern of the circuit board and the electrically conductive object, there is no process such as reflow soldering, so the material of the component must have heat resistance. There is no.

  As described above, in a small electrical contact terminal having a height of 0.5 mm or less, at least one channel having a certain width and depth is formed along the length direction downward from the upper surface of the elastic core. Thus, the object is elastically supported using the side walls on both sides of the channel and the support walls between the channels.

According to the present invention, it is possible to easily and efficiently manufacture an electrical contact terminal having a size that makes it difficult to form a through hole in an elastic core as in the prior art or to manufacture the elastic core itself in a tube shape. . Moreover, by covering the copper foil exposed from the cut surface in the length direction with a metal plating layer with good environmental resistance, it is possible to prevent contact between salt water and copper foil in the reliability test as a result. Since the copper foil is not exposed to the outside and there is no risk of rusting, reliability is improved.
Further, the solder cream spreads well on the metal plating layer formed so as to cover the copper foil with the cut surface in the length direction, thereby increasing the soldering strength on the cut surface.

  Although the embodiments of the present invention have been described above, various changes and modifications may be added based on the technical level of those skilled in the art. As long as the changes and modifications made do not depart from the scope of the present invention, it can be said to belong to the present invention. The scope of the present invention should be determined by the claims set forth below.

100, 200, 300 Electrical contact terminal 110, 210, 310 Elastic core 112, 211, 212 Channel 114, 116, 214, 216 Side wall 120, 220 Adhesive layer 130, 230 Polymer film 140, 240 Metal layer 141 Copper layer 142 Metal Plating layer 218 Support wall 242 Opening 340 Electrically conductive elastic rubber coating layer 350 Metal foil

Claims (13)

An electrical contact terminal that is interposed between objects and is in contact with the object to form an electrical path between the objects,
An elastic core with at least one channel recessed from the top surface, having a constant width and depth, and extending along the length direction;
A polymer film that is adhered while wrapping the elastic core through an adhesive layer;
A solderable metal layer that is bonded while wrapping the polymer film,
The polymer film is crossed over the channel and on both side walls of the channel, so that the side walls of the channel elastically support the object.
Elastic electrical contact terminal. A plurality of the channels are formed,
The elastoelectric contact terminal according to claim 1, further comprising a support wall extending in the length direction so as to protrude between the channels at a height corresponding to the side walls.   The elastic electric contact terminal according to claim 2, wherein the shape of the vertical cross section of the support wall is a trapezoid that becomes thinner toward the upper end.   The side surface on the channel side of the both side walls is inclined, so that the both side walls are inclined toward the channel side when pressurized by the object. The elastic electric contact terminal according to item.   The elastic electrical contact terminal according to claim 2 or 3, wherein an upper surface of the support wall is bonded to the polymer film through the adhesive layer. The metal layer is composed of a copper foil and a metal plating layer that wraps the surface and side surfaces of the copper foil,
6. The elastic electrical contact terminal according to claim 1, wherein the side surface of the copper foil includes a cross section in the length direction and a cross section in the width direction.   The elastic electrical contact terminal according to claim 6, wherein a thickness of the copper foil is greater than a thickness of the metal plating layer.   The copper foil is an electrolytic copper foil or a rolled copper foil, and a liquid polymer corresponding to the polymer film is applied onto the copper foil and cured to adhere to the polymer film or the adhesive. The elastic electrical contact terminal according to claim 6 or 7, wherein the elastic electrical contact terminal is adhered to the polymer film via a layer.   The elastic metal contact terminal according to any one of claims 6 to 8, wherein the metal plating layer is formed by electroless plating.   The elastic electrical contact terminal according to any one of claims 1 to 9, wherein a width of the electrical contact terminal is larger than a length of the electrical contact terminal.   The electrical contact terminal is soldered to a conductive pattern of a circuit board with a solder cream, and is electrically connected to an opposing electrical transmission object with elasticity. The elastic electrical contact terminal according to claim 1. An electrical contact terminal that is interposed between objects and is in contact with the object to form an electrical path between the objects,
An elastic core having at least one channel recessed downward from the upper surface, having a constant width and depth, and extending along the length direction;
An electrically conductive elastic rubber coating layer adhered to the outer surface of the elastic core;
A solderable metal foil adhered to the lower surface of the electrically conductive elastic rubber coating layer,
An elastic electric contact terminal, characterized in that both side walls of the channel elastically support the object. A plurality of the channels are formed,
The elastoelectric contact terminal according to claim 12, further comprising a support wall extending in the length direction so as to protrude between the channels at a height corresponding to the side walls.

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