JP2002343461A - Electrical connector and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connector capable of surely stably ensuring electrical continuity, even if compression load is small. SOLUTION: Through-holes 1a are installed formed in a line in the length and width directions in an insulation sheet 1 serving as a base material for the electrical connector 10, and a through-hole electrode 1b, on which a gold plated layer 4 is formed, is formed on the surface the inside which a conductive paste 3 is filled. A hemispherical elastic body 2 is arranged, so as to cover the through-hole electrodes 1b on both surfaces. A large amount of conductive fine particles 2a are included in the elastic body 2. When interposed between upper and lower electrodes of an electronic component and a circuit board, the elastic body 2 is bent and pressure contacted with the upper and lower electrodes to establish electrical continuity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector which is held between a plurality of vertically opposed electrodes to conduct the corresponding electrodes.

[0002]

2. Description of the Related Art In recent years, with the miniaturization of electronic devices, a technology for surface mounting electronic components on a circuit board has been developed and applied to various electronic components. Further, in this mounting, there is a demand for a solderless method for achieving electrical conduction without soldering as much as possible. For example, when a flat pack semiconductor is mounted on a circuit board, electrodes facing up and down are connected via an electrical connector. An example of such a conventional electrical connector will be described with reference to the drawings. 5 is a plan view showing a conventional electrical connector, FIG. 6 is a partial sectional view thereof, and FIG. 7 is a partial sectional view showing the operation of the electrical connector.

[0003] First, the configuration of the electric connector will be described. 5 and 6, reference numeral 70 denotes an electrical connector, and reference numeral 71 denotes a sheet body made of an insulating elastic material such as silicone rubber. Reference numeral 72 denotes a linear body made of a conductive member such as a metal fiber. The linear bodies 72 are randomly gathered so as to be separated from each other in the plane direction of the sheet body 71, and penetrate the sheet body 71 substantially vertically in the thickness direction,
It is buried so that both end faces are exposed from the sheet body 71.

Next, the operation of the electric connector will be described. In FIG. 7, reference numeral 80 denotes an electronic component such as a semiconductor package, and a plurality of terminal electrodes 80a are exposed on the lower surface. Reference numeral 90 denotes, for example, a circuit board on which an electrode pattern 90a corresponding to each electrode 80a is formed. The electronic component 80 is disposed on the circuit board 90 such that the corresponding electrodes face each other.
Pressure mounting is carried out with 0 interposed. Therefore, each electrode 80a
And the corresponding electrode pattern 90a overlap each other in the plane direction, and as long as the non-corresponding electrodes do not overlap each other, the linear body 72 is maintained substantially perpendicular even if they are slightly displaced from each other. Nothing happens. Therefore, such a conventional electrical connector 70 is an anisotropic conductive sheet having a property of conducting only in a substantially vertical direction, and is cut out from a large size and used in a shape corresponding to a planar shape on which electrodes are arranged.

FIG. 8 is a sectional view showing another conventional electric connector. In FIG. 8, reference numeral 75 denotes an electrical connector;
76 is a sheet body. Reference numeral 77 denotes a conductive linear body, which is different from the linear body 72 of the electrical connector 70 in that the linear body 7
7 are inclined by a fixed amount s in a fixed direction of the plane, and are aligned in the plane direction. That is, the sheet body 76
Both end surfaces of the linear body 77 on the upper and lower surfaces have an offset amount s. Therefore, when mounting an electronic component on a circuit board using the electrical connector 75, it is necessary to offset the corresponding electrodes by s in a certain direction.

[0006]

However, in the case of the former electrical connector, it is necessary to embed the linear body at a higher density as the electrode area becomes smaller. The higher the density of the linear body, the more the elasticity of the sheet body is lost.Therefore, if the electrode surface is not on the same surface, a linear body that does not sufficiently contact the electrode surface will occur and conduction will be unstable. Become. To prevent this, it is necessary to compress the sheet with a high load, and it is difficult to obtain stable contact. Further, in the case of the conventional electric connector such as the latter, since the linear body is arranged obliquely, there is an advantage that the elasticity of the sheet body is maintained and the conduction is ensured even under a light load, but in the layout of the connection electrodes, Since it is necessary to consider the offset, electrode design becomes difficult.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an electric connector which can surely and stably secure electrical conduction even when a compressive load is small. That is.

[0008]

Means for Solving the Problems To achieve the above object, the invention according to claim 1 of the present invention is directed to an insulating sheet and an insulating sheet penetrating in the thickness direction of the insulating sheet and having both end faces of the sheet. In an electrical connector comprising a plurality of conductive members buried so as to be exposed on the surface, a through hole aligned vertically and horizontally is formed in the insulating sheet, a through hole electrode is formed in the through hole, and both sides of the insulating sheet are formed. An elastic body containing conductive fine particles is adhered to the through-hole electrode portion.

According to a second aspect of the present invention, in the configuration of the first aspect, the through-hole electrode is a filling-type through hole filled with a conductive paste.

According to a third aspect of the present invention, in the configuration of the first or second aspect, the elastic body is formed substantially hemispherically on both surfaces of the insulating sheet. Features.

According to a fourth aspect of the present invention, there is provided an electrical connector comprising an insulating sheet and a plurality of conductive members embedded in the insulating sheet so as to penetrate the insulating sheet so that both end surfaces are exposed on the surface of the sheet. Forming a through hole aligned vertically and horizontally in the insulating sheet,
Forming a through-hole electrode by filling the through-hole with a conductive paste; and covering the through-hole electrode portions on both surfaces of the insulating sheet with an elastic body containing conductive fine particles.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electrical connector according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view of an electric connector according to an embodiment of the present invention, FIG. 2 is a partially enlarged sectional view of AA in FIG. 1, and FIG. 3 is a partially enlarged sectional view for explaining the operation of the electric connector.
FIG. 4 is a partially enlarged cross-sectional view illustrating the procedure for manufacturing the electrical connector.

First, the configuration of the electrical connector will be described. 1 and 2, reference numeral 10 denotes an electrical connector. One electric connector 10 is, for example, 10 cm × 10 c
Although it is manufactured in a large format of m, when it is used for mounting electronic components, it is cut into necessary sizes as needed. Reference numeral 1 denotes an insulating sheet as an insulating sheet body made of, for example, a glass epoxy resin plate, a polyimide resin plate, or the like as a base material of the electrical connector 10. Insulation sheet 1 has through hole 1a
Are formed vertically and horizontally at a pitch of, for example, 1 mm, and a through-hole electrode 1b is formed there. No. 2 contains a large amount of conductive fine particles 2a which are fine particles of, for example, copper or silver having a diameter of several μm to several tens μm in a material such as silicone rubber, urethane rubber, polyester rubber, or fluorine rubber. An elastic body formed by the through-hole electrodes 1b on both sides of the insulating sheet 1.
Is hemispherically covered and adhered. Reference numeral 3 denotes a conductive paste, such as a copper paste, which is filled in the through-hole electrode 1a and serves as a filling member for improving the conductivity of the upper and lower through-hole electrodes 1a. Reference numeral 4 denotes a gold plating layer provided on the surface of the through-hole electrode 1b.

Next, the operation of the electric connector will be described with reference to FIG. In FIG. 3, reference numeral 30 denotes an electrode portion 30a.
Is a circuit board on which the electronic component 30 on which the electrode pattern 40a is formed so as to face the electrode portion 30a is mounted. The electrical connector 10 cut to a size suitable for the place of use includes the electronic component 30 and the circuit board 40.
It is mounted in a form sandwiched between As a result, the elastic body 2 of each through-hole electrode 1a included in the plane area of each electrode part 30a and the electrode pattern 40a abuts on both electrode parts, and the elastic body 2 is in a compressed state.
The conductive fine particles 2a included in the elastic body 2 come into contact with each other, so that conduction between both electrode portions is achieved.

Next, a method of manufacturing the electric connector will be described with reference to FIG.
This will be described with reference to FIG. First, a through hole 1a is formed in an insulating plate or sheet 1 (a). Next, the through hole 1a
To form a through-hole electrode 1b by electroless copper plating (b). Further, a conductive paste 3 or an epoxy resin or the like is filled in the hole of the through-hole electrode 1b, and after hardening, gold plating is performed on the surface to form a gold plating layer 4 (c).
Next, the elastic body 2 containing the conductive fine particles 2a is supplied into the mold on the upper and lower through-hole electrodes 1a, and the elastic body 2 is adhered to the insulating sheet 1 one by one, and adhered in a hemispherical shape (d).
(E).

Next, the effects of the embodiment of the present invention will be described. By forming the through-hole electrode 1b, the area of the electrode in contact with the elastic body 2 was secured, and the conductivity was improved.
Further, by filling the conductive paste 3 in the through-hole electrode 1b, the conductivity of the through-hole electrode 1b is further improved, and even if the pressure and stroke of the electrical connector 10 are small, low resistance and good conduction between the two electrodes are obtained. was gotten. Since each of the elastic members 2 is easily deformed, the elastic members 2 are easily bent even if the load for compressing the electrical connector 10 is small, and the conductive fine particles 2a are easily brought into contact with each other due to the compressive deformation of the elastic member 2, so that the electric conductivity of the elastic member 2 is reduced. Is surely obtained. Further, even if the elastic body 2 is deformed, the position of the insulating sheet 1 of the base material in the plane direction does not change. Also, when mounting electronic components on a circuit board, even if there is a variation in the height of a plurality of electrode portions, this is absorbed and the top surface of the elastic body 2 included in one electrode surface is completely formed. Since the electrodes come into contact with the electrode surfaces, reliable connection between the electrodes is realized. Since the through-hole electrode 1a is a hole-filling type through-hole, the resin is prevented from leaking from the through-hole to the opposite side in the first step of attaching the elastic body 2 (FIG. 4D). The material to be filled is not necessarily limited to conductivity, but may be epoxy resin or the like.

[0017]

As described above, according to the present invention,
A through-hole electrode is formed on the insulating sheet body, and an elastic body containing conductive fine particles is adhered to this through-hole electrode. An electrical connector as a conductive sheet was obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of an electrical connector according to an embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is a partially enlarged cross-sectional view illustrating an operation of the electrical connector according to the embodiment of the present invention.

FIG. 4 is a partially enlarged cross-sectional view showing a procedure for manufacturing the electrical connector according to the embodiment of the present invention.

FIG. 5 is a plan view of a conventional electrical connector.

6 is a partially enlarged sectional view of FIG. 5;

FIG. 7 is a partially enlarged sectional view showing the operation of a conventional electrical connector.

FIG. 8 is a partially enlarged sectional view of another conventional electrical connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation sheet 1a Through hole 1b Through hole electrode 2 Elastic body 2a Conductive fine particle 3 Conductive paste 4 Gold plating layer 10 Electric connector

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tsutomu Kojima 5-2-15-1 Mitake, Morioka-shi, Iwate Citizen Iwatenai F-term (Reference) 5E051 CA03 5E319 AA03 AC01 CC03 GG20

Claims (4)

[Claims] 1. An electrical connector comprising an insulating sheet and a plurality of conductive members penetrating in a thickness direction of the insulating sheet and having both end faces buried so as to be exposed on the surface of the sheet. An electrical connector comprising: an aligned through-hole; a through-hole electrode formed in the through-hole; and an elastic body containing conductive fine particles adhered to the through-hole electrode on both surfaces of the insulating sheet. 2. The electrical connector according to claim 1, wherein said through-hole electrodes are filled-in through holes filled with a conductive paste. 3. The electrical connector according to claim 1, wherein the elastic body is formed substantially hemispherically on both surfaces of the insulating sheet. 4. A method for manufacturing an electrical connector comprising: an insulating sheet; and a plurality of conductive members embedded in the insulating sheet so as to penetrate in a thickness direction of the insulating sheet so that both end faces are exposed on the surface of the sheet. Forming through-holes arranged vertically and horizontally, filling the through-holes with a conductive paste to form through-hole electrodes, and forming the through-hole electrode portions on both sides of the insulating sheet into an elastic body containing conductive fine particles. A method of manufacturing an electrical connector, comprising: