JP2000331726A - Electrical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connector, capable of improving in connection reliability by simplifying positioning and providing good conductivity by preventing bending and breakage of an electrically joining object, even when pressing force is increased. SOLUTION: This electrical connector comprises an elastic insulating sheet 4 of Shore A hardness of 10-70 deg. H interposed between a circuit substrate 6 and a surface type LSI 8, a plurality of wires 2 buried in the vertical directions of the elastic insulating sheet 4 and mutually separated with a certain pitch, and a contact 5 of a thickness of 50-500 μm attached on front and rear surfaces of the elastic insulating sheet 4, by using conductive polymer material formed by dispersing conductive filler to a polymer elastic body, connected with upper and lower end parts of each of the wires 2 exposed from the front and rear surfaces of the elastic insulating sheet 4, and contacting with each of a plurality of electrode terminals 7, 9 of the circuit substrate 6 and the surface mounting type LSI 8. Because the of the contact 5 of the wire 2 is large, positioning is facilitated, even when the electrode terminal 9 is small like a ball electrode and the like, so that improvement in connection reliability can be expected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an electrical connector for electrically connecting a circuit board to an electrode terminal of a surface-mounted LSI or the like.

[0002]

2. Description of the Related Art Conventionally, in the case of inspecting and using a surface-mounted LSI, in order to connect the electrode terminal of the surface-mounted LSI to the electrode terminal of a circuit board for inspection and practical use, it is necessary to hold down between the two electrode terminals. Is pressed down across the electrical connector which is a tool. As shown in FIG. 6, the most common electrical connector of this type includes an elastic insulating sheet 4 interposed between a circuit board and a surface-mounted LSI, and has a constant pitch in the thickness direction of the elastic insulating sheet 4. The upper and lower ends of the plurality of wires 2 are slightly exposed from the front and back surfaces of the elastic insulating sheet 4 to function as small contacts 5.

In the above configuration, when a circuit board (not shown) is electrically connected to a surface-mount LSI, an electric connector is sandwiched between the circuit board and the surface-mount LSI, and wires 2 are connected to a plurality of electrode terminals of the circuit board. The contact 5 at the lower end of the wire 2 is brought into contact with the plurality of electrode terminals of the surface mount type LSI, respectively. Then, when the surface-mount LSI is pressed down, the circuit board and the surface-mount LSI can be electrically connected via the electric connector.

As related prior art documents of this kind,
JP-A-9-115577, 9-35789, 8-3
No. 35486 and Japanese Patent No. 2796872.

[0005]

In the conventional electrical connector, since the area of the contact 5 of each wire 2 is very small as described above, the electrode terminal of the circuit board or the electrode terminal of the surface mount type LSI is like a ball electrode. In the case of a very small size or a three-dimensional shape, alignment is extremely difficult, and there is a problem that the reliability of the connection is lacking. In recent years, surface-mounted LSIs have become more sophisticated. However, as surface-mounted LSIs become more sophisticated and their electrode terminals increase, the size of the surface-mounted LSI or the contact area between the surface-mounted LSI and the electrical connector increases. It will expand. For this reason, the pressing force necessary for obtaining stable conduction between the electrode terminals is increased. As a result, if the conventional electrical connector is used as it is, the circuit board may be bent or the electrode terminals of the surface mount type LSI may not be used. And the package may be bent and damaged, so that reliable conduction may not be obtained.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and can improve the reliability of connection by facilitating the alignment, and can prevent the electrical joint from being bent or damaged even if the pressing force increases. It is an object of the present invention to provide an electrical connector that can prevent the occurrence of such problems and obtain good conduction.

[0007]

According to the first aspect of the present invention, in order to achieve the above object, the first and second electrical joints are sandwiched between and electrically connected to each other. An elastic insulating sheet having a Shore A hardness of 10 ° to 70 ° interposed between the first and second electrical joints;
A plurality of conductive strips buried in the thickness direction of the elastic insulating sheet and separated from each other at a constant pitch, and a conductive polymer material on the front and back surfaces of the elastic insulating sheet having a thickness of 50 μm to 5 μm.
Each of the plurality of conductive wires is formed to have a thickness of 00 μm, is connected to both ends of the plurality of conductive wires exposed from the front and back surfaces of the elastic insulating sheet, and contacts the plurality of electrode terminals of the first and second electrical joints. And a contact.

The above-mentioned polymer substance is a substance in which a conductive filler is dispersed in a polymer elastic body, and each of the above-mentioned contacts is an array of a plurality of electrode terminals of the above-mentioned first and second electric joints. It can be formed in a size of １ ／ to ／ of the pitch. In addition, the high-molecular substance is a thermosetting resin or a resin obtained by adding a curing agent to a thermoplastic resin mixed with a conductive filler, and each of the contacts is formed of a plurality of the first and second electrical joints. It is also possible to form them in a size of 1/4 to 3/5 with respect to the arrangement pitch of the electrode terminals.

Here, the first and second electrical joints in the claims include a circuit board for inspection, a practical circuit board, a build-up wiring board, a BGA, an LGA, and an FBG.
A, a surface-mounted LSI composed of PBGA, etc., or a surface-mounted electric / electronic component. As the conductive wire, a wire which is not corroded by the elastic insulating sheet and has a small volume resistivity is preferable. Specifically, a metal wire plated with Cu, Au, Ni, Al, brass, or gold is used. Examples of a method for providing the conductive wire include a wedge bonding method, a metal bonding method, an ultrasonic wire bonding method, and a method of forming a hole in a metal plate and inserting the metal plate. Among them, a metal bonding method excellent in accuracy and speed is preferable. The metal plate is not particularly limited, but is preferably an inexpensive plate that can be easily removed by etching. Specifically, an iron-based alloy that can be etched most easily, for example, 42
Alloy alloys and the like are preferred.

According to the first aspect of the present invention, an electric connector is sandwiched between the first electric joint and the second electric joint, and the conductive wire is connected to the electrode terminal of the first electric joint. One contact of the strip is brought into contact with the electrode terminal of the second electrical joint with the other contact of the conductive strip. Then, if pressure is applied to the second electrical joint as needed in the direction of the first electrical joint, the first and second electrical joints are electrically conducted through the electric connector. be able to. Since a contact having a large area is separately provided at the end of each conductive wire, even when the electrode terminals of the first and second electrical joints are small like a ball electrode or formed in a three-dimensional shape, etc. Alignment is simplified. Also,
Since each contact protrudes from the elastic insulating sheet,
Followability of the first and second electrical joints to the electrode terminals is improved.

Further, according to the second aspect of the present invention, since each contact is an elastic body, it is possible to reduce the pressure required for obtaining stable conduction between the electrode terminals. Therefore, good conduction can be expected without the first and second electrical joints being bent or damaged. Further, claim 3
According to the described invention, since the resin contact having a predetermined rigidity protrudes from the elastic insulating sheet, the pressing force can be concentrated on the contact. Therefore, stable conduction between the electrode terminals can be obtained even with a relatively small pressing force.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the following embodiments. As shown in FIGS. 1 (a), 1 (b), 1 (c), 1 (d) and 1 (e) and FIG. 2, the electrical connector according to the present embodiment includes a lower circuit board 6 and an upper surface mount type LSI.
An elastic insulating sheet 4 interposed between the elastic insulating sheets 8, a plurality of wires 2 embedded and formed in the thickness direction of the elastic insulating sheet 4, in other words, a vertical direction, and a conductive filler formed on an elastic body such as an elastomer. Are formed on the front and back surfaces of the elastic insulating sheet 4 by using a polymer material in which a plurality of wires 2 are dispersed, and are connected to the upper and lower ends of each wire 2 slightly exposed from the front and back surfaces of the elastic insulating sheet 4. A contact 5 is provided, and the plurality of contacts 5 are respectively brought into contact with the circuit board 6 and the plurality of electrode terminals 7 and 9 of the surface-mounted LSI 8.

The elastic insulating sheet 4 has a thickness of 10 to 50 at the time of raw material.
It is a liquid substance of about 0P and has a Shore A hardness of 10 after curing.
It is formed into a plate-shaped cross section from a sheet material of ７０70 ° H, preferably 20-50 ° H. As a specific sheet material, silicone rubber having a small conductivity is used in consideration of high-frequency characteristics.

The plurality of wires 2 are made of Au having a small volume resistivity and hard to corrode, and are arranged at a constant pitch in the XY directions of the elastic insulating sheet 4 and are separated from each other. Each wire 2 is formed to have a diameter of about 10 μm to 100 μm,
It is bent and buried in a substantially crank shape. The reason why the diameter of the wire 2 is set to the range is that if the diameter is below the range, the strength is reduced and the wire 2 may be broken at the time of compression. On the other hand, if the value is not less than the numerical value in the range, the wire 2 is hardly deformed at the time of pressing, the repulsive force against the pressing increases, and as a result, the pressing force necessary to obtain stable conduction between the electrode terminals 7 and 9 is reduced. Because it increases. The inclination angle of the bent portion of each wire 2 is set to 0 to 60 °, preferably 45 °, and a reduction in necessary pressing force can be expected.

As the conductive polymer material forming each contact 5, a polymer elastic material such as a flexible elastomer such as silicone or urethane is used as a binder. As the conductive filler, gold powder, silver powder, nickel,
A filler made of aluminum powder, plating powder, carbon powder, or graphite powder alone or in combination of two or more kinds is used. The average particle diameter of the conductive filler is most preferably not more than the diameter of the wire 2 used, particularly about 1/10 of the diameter, in consideration of the probability of contact with the exposed portion of the wire 2. For example, when a wire 2 having a diameter of 50 μm is used, the average particle diameter of the conductive filler is optimally 50 μm or less and about 5 μm. The polymer material is in a liquid state or a paste state in a raw material state and has a hardness of 10 to 70 ° Shore A hardness after curing.
H, preferably 40-60 ° H. The volume resistivity after curing is 10 ^-7 to 10 ^-2 Ω when compressed by about 5%.
m is desirable.

[0016] Each contact 5, as shown in FIG. 2, with respect to the electrode pitch P ₁ of the terminal 9 of the electrode terminals 7 or a surface mount type LSI8 of the circuit board 6 of about 1 / 4-3 / 4 size circular , Square, etc. For example, the electrode terminal 7
If the pitch P ₁ of-9 is 1mm pitch, circular size of 0.75mm from 0.25 mm, is formed in a rectangular shape or the like. Each contact 5 is formed in a plate shape in cross section having a thickness of about 50 μm to 500 μm. If the thickness is smaller than this, the strength of the contact 5 is lacking, and if the thickness is larger than this, the high frequency characteristics deteriorate.

Next, a method for manufacturing an electrical connector according to the present embodiment will be described in detail with reference to FIGS. 1 (a), 1 (b), 1 (c), 1 (d) and 1 (e). First, a copper plate 1 that is a metal plate that can be easily etched is prepared, and thermocompression bonding wire bonding with ultrasonic waves capable of low-temperature bonding is performed on the copper plate 1 using a wire bonder (not shown). By this wire bonding, the plurality of wires 2 are bonded in a substantially crank shape, and the electrode terminals 7.9 of the circuit board 6 and the surface mount type LSI 8 are formed.
Mutually spaced apart in the XY direction at the same predetermined pitch P ₁ (see Figure 1 (a)).

Next, a synthetic resin mold 3 surrounding the plurality of wires 2 is placed on the copper plate 1, and a casting resin as an elastomer resin is filled and cured in the mold 3 to form the elastic insulating sheet 4. The upper end of each wire 2 is slightly exposed from the flat surface of the elastic insulating sheet 4 (see FIG. 1B). After the upper end of each wire 2 is exposed, the copper plate 1 is removed by means such as chemical etching or blasting, and the lower end of each wire 2 is slightly exposed from the back surface of the elastic insulating sheet 4 (FIG. 1 (c)). reference). When the copper plate 1 is etched by chemical etching, ferric chloride is preferably used as an etchant.

Then, a plurality of contacts 5 are provided by attaching a conductive polymer substance to both sides of the elastic insulating sheet 4, and circular contacts 5 are connected only to the upper and lower ends of each wire 2. Electrical connector can be manufactured by conducting only in the vertical direction.
(See FIGS. 1 (d) and 1 (e)). As a means for connecting the contact 5, a screen printing method, a metal mask method, a potting method, a transfer method, or the like may be appropriately employed.

In the above configuration, when the circuit board 6 and the surface-mount type LSI 8 are electrically connected for inspection,
An electrical connector is sandwiched between the circuit board 6 and the surface-mounted LSI 8, and the contact 5 at the lower end of the wire 2 is provided on the plurality of electrode terminals 7 of the circuit board 6, and the ball-shaped electrode terminals of the surface-mounted LSI 8 are provided. The contacts 5 on the upper end of the wire 2 are brought into position contact with the wires 9 respectively. Then, when the surface-mount type LSI 8 is pressed down, the elastic insulating sheet 4 is deformed, and the circuit board 6 and the surface-mount type LSI 8 can be electrically connected to each other via an electrical connector for inspection.

According to the above configuration, since the area of the contact 5 of each wire 2 is large, the electrode terminal 7 of the circuit board 6 or the electrode terminal 9 of the surface mount type LSI 8 is small like a ball electrode, or has a three-dimensional shape. Even if it is formed, positioning and adjustment are very easy, and the reliability of the connection can be significantly improved. Further, since the wire 2 is bonded in a substantially crank shape and the contact 5 is an elastic body having flexibility, the pressing force required for obtaining stable conduction between the electrode terminals 7 and 9 can be greatly reduced. Therefore, the circuit board 6 is bent or the surface mount type L
The electrode terminals 9 of the SI 8 and the package are not bent and damaged, so that reliable conduction can be obtained.

Further, since the plurality of contacts 5 are provided so as to protrude from the elastic insulating sheet 4, the ability to follow the electrode terminals 7 of the circuit board 6 and the electrode terminals 9 of the surface mount type LSI 8 is remarkably improved, and the contact area is widened. can do.
This improvement in the followability is achieved by the electrode terminals 9 of the surface-mounted LSI 8.
Is a ball or when the electrode terminals 7 of the circuit board 6 are in a projection shape, in other words, when the electrode terminals 7 and 9 have a three-dimensional shape,
Particularly useful. In addition, since conductive polymer substances are respectively attached to the front and back surfaces of the elastic insulating sheet 4 by a screen printing method, a metal mask method, a potting method, a transfer method, or the like, the thickness and shape of the contact 5 can be easily controlled. We can expect much.

From the above, the large or multi-pin L
Even with a surface-mounted LSI 8 such as a GA or BGA, a reliable connection can be expected with a small pressing force to the practical circuit board 6 for inspection, and the package and the electrode terminals 9 of the surface-mounted LSI 8 are not damaged. . In addition, inspection time and installation time can be reduced, and efficient connection work can be greatly expected.
Furthermore, since the conduction path is short, the high frequency characteristics are excellent, and the electrical connector can be manufactured easily and with good yield.

Next, FIGS. 3 (a), 3 (b), 3 (c) and 4 show a second embodiment of the present invention. A conductive sheet 10 obtained by adding a curing agent to a thermosetting resin or a thermoplastic resin containing a conductive filler, and each contact 5 is arranged at a pitch of a plurality of electrode terminals 7A and 9A of a circuit board 6A or a surface mount LSI 8A. and so as to form a predetermined size with respect to P _2.

As the thermosetting resin, epoxy resin, acrylic resin, polyimide or the like can be used. As the thermoplastic resin, polyester or the like can be used. The polymer substance is preferably in a liquid state, a paste state, or a film state in a raw material state. This polymer substance has a pencil hardness of 6B to 9H after curing, preferably 3H to 9H, and a volume resistivity after curing of 10 ⁻⁷ to 10 ⁻⁷ .
It is desirable to be about 10 ^-2 Ωm.

[0026] formed in each contact 5 is circular circuit board 6A and relative arrangement pitch P ₂ of the plurality of electrode terminals 7A · 9A of the surface mount LSI8A 1 / 4~3 / 4 about the size, square, etc. Is done. For example, if the arrangement pitch P ₂ of the electrode terminal 7A · 9A is 1mm pitch, 0.25Mm～0.7
It is formed in a 5 mm circular or square shape. Each contact 5
Is formed in a plate shape in cross section having a thickness of about 100 μm to 500 μm. If the thickness is smaller than this, the amount of protrusion of the contact 5 from the elastic insulating sheet 4 is small, so that it is difficult to obtain the effect of concentrating the pressing. On the other hand, if the thickness is larger than the above value, the high frequency characteristics deteriorate.

Next, a method of manufacturing the electrical connector according to the present embodiment will be described with reference to FIGS. 3 (a), 3 (b), 3 (c) and the like. First, a first conductive sheet 10A is prepared, and ultrasonic combined thermocompression wire bonding capable of low-temperature bonding is performed on the first conductive sheet 10A using a wire bonder (not shown). By this wire bonding, a plurality of wires 2
Are bonded to the circuit board 6A and the electrode terminals 7A and 9A of the surface mount type LSI 8A.
Mutually spaced apart in the XY directions at the same constant pitch P ₂ and.

Next, a synthetic resin form 3 surrounding the plurality of wires 2 is set on the first conductive sheet 10A.
The mold frame 3 is filled with a casting resin, which is an elastomer resin, and cured to form the elastic insulating sheet 4. Then, the upper end of each wire 2 is slightly exposed from the surface of the elastic insulating sheet 4, and the second conductive sheet 10B is laminated and adhered to the surface of the elastic insulating sheet 4, and the upper end of each wire 2 is The two conductive sheets 10B are connected (see FIG. 3A).

After the upper end of each wire 2 is connected to the second conductive sheet 10B, the first and second conductive sheets 10B are connected.
A · 10B is partially cut, specifically, into a lattice shape using a laser beam, a cutter, water, sandblast, or the like, and the remaining portions of the first and second conductive sheets 10A and 10B are contacted with a plurality of contacts. Manufacturing electrical connector as 5
(See FIGS. 3B and 3C). When the first and second conductive sheets 10A and 10B are made of a thermoplastic resin, they can be cut by a melting method using heat or the like.

In the above configuration, when the circuit board 6A and the surface-mount type LSI 8A are electrically connected for inspection,
An electrical connector is sandwiched between the circuit board 6A and the surface-mounted LSI 8A, and the contacts 5 at the lower end of the wire 2 are provided on the plurality of electrode terminals 7A having the surface of the circuit board 6A, and the surface of the surface-mounted LSI 8A is provided. The contacts 5 at the upper ends of the wires 2 are brought into positioning contact with the plurality of electrode terminals 9A, respectively. Then, if the surface mount type LSI 8A is pressed down,
The elastic insulating sheet 4 is deformed, and the circuit board 6A and the surface-mounted LSI 8A can be electrically connected to each other via an electrical connector for inspection. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted.

In this embodiment, the same operation and effect as those of the above embodiment can be expected. Further, since the resin contact 5 having a certain degree of rigidity protrudes from the elastic insulating sheet 4, the pressing force on the contact 5 is extremely high. It can be easily focused. Accordingly, stable conduction between the electrode terminals 7A and 9A can be obtained even with a small pressing force. This stable conduction is really useful when the size of the surface mount LSI 8A or the contact area between the circuit board 6A and the surface mount LSI 8A increases, or when the electrode terminals 7A and 9A are planar.

In the above embodiment, the wire bonding is performed in a substantially crank shape. However, the wire bonding is not limited to this as long as the pressing force can be reduced. For example, as shown in FIG. 5, the pressing force may be reduced by inclining the linear wire 2 in the thickness direction (normal line) of the elastic insulating sheet 4 by 30 to 60 °, preferably 45 °. Further, the wire 2 may be formed to be bent into a substantially S-shape or a substantially U-shape. In this case, the inclination angle of the bent portion of the wire 2 is set to 0 to 60.
The angle, preferably 45 °, is effective in reducing the necessary pressing force. Further, the circuit boards 6, 6A and the surface-mounted LSIs 8, 8A are pressed down by pressing the surface-mounted LSIs 8, 8A.
It is also possible to conduct the electric current by simply interposing an electrical connector between the circuit boards 6 and 6A and the surface-mount LSIs 8 and 8A instead of conducting the electric current.

[0033]

EXAMPLE 1 A copper sheet 1 having a thickness of 0.5 mm and a length and width of 30 mm was placed on a copper plate 1 having a diameter of 5 mm.
A wire 2 of 0 μm was vertically bonded at a pitch of 2.0 mm in a range of 26 mm in length and width by a known wire bonding method. Next, the two-component silicone rubber KE-109A / B (trade name, manufactured by Shin-Etsu Chemical Co., Ltd., trade name) is filled into the bonding area of the plurality of wires 2 via the mold 3 and
The composition was cured under the condition of 0 ° C./2 h to form the elastic insulating sheet 4. When forming the elastic insulating sheet, the elastic insulating sheet 4
Was made 2.5 mm thick, and the upper end of each wire 2 was exposed from the surface of the elastic insulating sheet 4. When the upper end of each wire 2 is exposed, the copper plate 1 is removed by etching with ferric chloride, and a plurality of wires 2
Were exposed at their lower ends.

The elastic conductive material 3303 is applied only to both ends of each wire 2 exposed from the elastic insulating sheet 4.
[Trade name, manufactured by Three Bond Co., Ltd.] was formed to have a diameter of 1.0 mm and a height of 100 μm by a metal mask method, and was heat-cured to produce an electrical connector having an outer shape of 30 mm long and 30 mm wide. This electrical connector is connected to the electrode terminals 7 of the inspection circuit board 6A.
A and the surface electrode 9A of the surface-mount type LSI 8A were sandwiched and compressed by 15%. As a result, reliable conduction was obtained between the electrode terminals 7A and 9A.
2 could be reduced. In addition, the position adjustment of the conventional electrical connector is difficult, and the conventional electrical connector cannot be connected stably. On the other hand, in the electrical connector of the present embodiment, when the electrode terminals 7 were similarly compressed by 15% even when the ball-shaped surface-mounted LSI 8 was used, it was confirmed that reliable conduction was established between the electrode terminals 7 and 9. Was completed.

Example 2 A copper sheet 1 having a thickness of 0.5 mm and a length and width of 30 mm was placed on a copper plate 1 having a diameter of 5 mm.
A wire 2 of 0 μm was vertically bonded at a pitch of 2.0 mm in a range of 26 mm in length and width by a known wire bonding method. Next, the two-component silicone rubber KE-109A / B (trade name, manufactured by Shin-Etsu Chemical Co., Ltd., trade name) is filled into the bonding area of the plurality of wires 2 via the mold 3 and
The composition was cured under the condition of 0 ° C./2 h to form the elastic insulating sheet 4. When forming the elastic insulating sheet, the elastic insulating sheet 4
Was made 2.5 mm thick, and the upper end of each wire 2 was exposed from the surface of the elastic insulating sheet 4. After the upper ends of the wires 2 were exposed, the copper plate 1 was removed by etching with ferric chloride, and the lower ends of the wires 2 were exposed from the back surface of the elastic insulating sheet 4.

The thermosetting conductive adhesive 330 is applied only to both ends of each wire 2 exposed from the elastic insulating sheet 4.
1 [Made by Three Bond Co., Ltd.]
An electrical connector having an outer shape of 30 mm in length and 30 mm in width was manufactured by heating and hardening to form a connector having a thickness of 8 mm and a thickness of 100 μm. When this electrical connector is sandwiched between the electrode terminals 7A of the inspection circuit board 6A and the planar electrode terminals 9A of the surface mount LSI 8A and compressed by 15%, reliable conduction between the electrode terminals 7A and 9A is obtained. Was. The pressing force in this case was also reduced to 1/3 of the conventional one.

Example 3 A copper plate 1 having a thickness of 0.5 mm and a length and width of 30 mm was placed on a copper plate 1 having a diameter of 5 mm.
A wire 2 of 0 μm was vertically bonded at a pitch of 2.0 mm in a range of 26 mm in length and width by a known wire bonding method. Next, the two-component silicone rubber KE-109A / B (trade name, manufactured by Shin-Etsu Chemical Co., Ltd., trade name) is filled into the bonding area of the plurality of wires 2 via the mold 3 and
The composition was cured under the condition of 0 ° C./2 h to form the elastic insulating sheet 4. When forming the elastic insulating sheet, the elastic insulating sheet 4
Was made 2.5 mm thick, and the upper end of each wire 2 was exposed from the surface of the elastic insulating sheet 4. When the upper end of each wire 2 is exposed, the copper plate 1 is removed by etching with ferric chloride, and a plurality of wires 2
Were exposed at their lower ends.

Then, a conductive adhesive DX-152H-1 [trade name, manufactured by Toyobo Co., Ltd.] using a thermoplastic resin only at both end portions of each wire 2 exposed from the elastic insulating sheet 4 by a metal mask method. An electrical connector having an outer shape of 30 mm in length and 30 mm in width was manufactured by forming into a diameter of 0.8 mm and a thickness of 100 μm and curing by heating. When this electrical connector is sandwiched between the electrode terminals 7A of the inspection circuit board 6A and the planar electrode terminals 9A of the surface mount LSI 8A and compressed by 15%, reliable conduction between the electrode terminals 7A and 9A is obtained. Was. The pressing force in this case was also reduced to 1/3 of the conventional one.

[0039]

As described above, according to the present invention, there is an effect that the alignment of the electrical joint can be easily performed and the reliability of the connection can be improved. In addition, even if the pressing force is increased in accordance with the sophistication of the electrical joint, it is possible to prevent the electrical joint from being bent or damaged, and to obtain good conduction.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of an electrical connector according to the present invention, wherein FIG. 1 (a) is a cross-sectional explanatory view showing a state of wire bonding on a copper plate, and FIG. Sectional explanatory view showing a state in which the elastic insulating sheet is molded by filling and curing, and (c) is a sectional explanatory view showing a state in which the copper plate is removed and the lower ends of the respective wires are slightly exposed from the back surface of the elastic insulating sheet. (D) is a cross-sectional explanatory view showing a state in which conductive polymer substances are provided on both front and back surfaces of the elastic insulating sheet, and contacts are connected to upper and lower ends of each wire, and (e) is (d) FIG. FIG.

FIG. 2 is an explanatory sectional view showing a use state of the electric connector according to the embodiment of the present invention.

FIG. 3 is an explanatory view showing a second embodiment of the electric connector according to the present invention, in which FIG. 3 (a) shows the upper end of each wire slightly exposed from the surface of the elastic insulating sheet, and Cross-sectional explanatory view showing a state where the second conductive sheet is laminated and attached and the upper end of each wire and the second conductive sheet are connected, (b) diagram is a first, the second conductive sheet FIG. 4 is a cross-sectional explanatory view showing a state of being cut into a lattice shape, and FIG. 4C is a plan view of FIG.

FIG. 4 is an explanatory sectional view showing a use state of an electric connector according to a second embodiment of the present invention.

FIG. 5 is an explanatory sectional view showing another embodiment of the electric connector according to the present invention.

FIG. 6 is an explanatory sectional view showing a conventional electrical connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Copper plate 2 Wire (conductive wire) 3 Formwork 4 Elastic insulating sheet 5 Contact 6 Circuit board (1st electrical connection) 6A Circuit board (1st electrical connection) 7 Electrode terminal 7A Electrode terminal 8 Surface Mounting type LSI (second electrical connection) 8A Surface mounting type LSI (second electrical connection) 9 Electrode terminal 9A Electrode terminal 10 Conductive sheet 10A First conductive sheet 10B Second conductive sheet

Claims (3)

[Claims] 1. An electrical connector sandwiched between first and second electrical joints to electrically connect them, said electrical connector being interposed between said first and second electrical joints. An elastic insulating sheet having a Shore A hardness of 10 ° to 70 °, a plurality of conductive strips embedded in the thickness direction of the elastic insulating sheet and separated from each other at a constant pitch, Each having a thickness of 50 μm to 500 μm using a conductive polymer material, connected to both ends of the plurality of conductive wires exposed from the front and back surfaces of the elastic insulating sheet, and forming the first and second electric wires. An electrical connector comprising: a plurality of contacts in contact with a plurality of electrode terminals of a joined object. 2. The method according to claim 1, wherein the polymer material is a material in which a conductive filler is dispersed in a polymer elastic material, and each of the contacts is an array of a plurality of electrode terminals of the first and second electrical joints. The electrical connector according to claim 1, wherein the electrical connector is formed to have a size of 1/4 to 3/4 of the pitch. 3. The method according to claim 1, wherein the polymer substance is a thermosetting resin containing a conductive filler or a substance obtained by adding a curing agent to a thermoplastic resin. 1 for the arrangement pitch of a plurality of electrode terminals
2. The electrical connector according to claim 1, wherein the electrical connector is formed in a size of to ３.