JP2002025672A - Electric connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connector capable of surely and reliably ensuring the electric conduction even when the compression load is small. SOLUTION: Through holes 3 are made in an arranged manner in an insulating sheet which is a body of the electric connector 10, and an elastic body 2 which is a flat spherical body is embedded in each through hole 3. One connection pattern 4 branched from conductor patterns on upper and lower surfaces of the insulating sheet 1 led from the through holes 3 and in the vicinity thereof, and the other connection pattern are extended upward and downward of the elastic body 2, respectively, and reach a top surface of the elastic body 2. When the insulating sheet is held between upper and lower electrodes of an electronic component, the elastic body 2 presses the upper and lower connection patterns 4 against the upper and lower electrodes to ensure the conduction while the elastic body is deflected.

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. FIG. 10 is a plan view showing a conventional electrical connector, FIG. 11 is a sectional view thereof, and FIG. 12 is a sectional view showing the operation of the electrical connector.

[0003] First, the configuration of the electric connector will be described. 10 and 11, reference numeral 70 denotes an electrical connector, and reference numeral 71 denotes a sheet 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. Each of the linear members 72 is a sheet member 7.
1 are randomly embedded so as to be separated from each other in the plane direction, and are buried so as to penetrate vertically in the thickness direction and expose the end face.

Next, the operation of the electric connector will be described. In FIG. 12, reference numeral 80 denotes a semiconductor package, and a plurality of terminal electrodes 80a are exposed on the lower surface. 90
Is a circuit board on which an electrode pattern 90a corresponding to each electrode 80a is formed. Semiconductor package 8
Numeral 0 is disposed so that the electrodes face each other with respect to the circuit board 90, and is pressure-mounted with the electric connector 70 interposed therebetween. Accordingly, even if the electrode patterns 90a are slightly displaced by the linear members 72 of the electrical connector 70 unless the electrode patterns 90a are overlapped with each other in the plane direction, the linear members 72 are maintained substantially vertical, and thus the electrodes 80a are electrically connected to the adjacent electrodes. It does not happen. Therefore, such a conventional electrical connector 70 is an anisotropic conductive sheet having a property of conducting only in the 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. 13 is a sectional view showing another conventional electric connector. In FIG. 13, reference numeral 75 denotes an electrical connector, and 76 denotes 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 77 is inclined by a predetermined amount s in a predetermined direction of a plane and is aligned in a plane direction. is there. That is, the end face of the linear body 77 on the upper and lower surfaces of the sheet body 76 has the offset amount s. Therefore, when a semiconductor package is mounted on a circuit board using the electric 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 member at a higher density as the electrode area becomes smaller. Since the elasticity of the sheet body is lost as the linear body becomes denser, 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 conventional electrical connector 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 In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is directed to an insulating sheet body and both end faces penetrating in the thickness direction of the insulating sheet body. In an electrical connector comprising a plurality of conductive members embedded so as to be exposed on the surface of a sheet member, holes are provided in the insulating sheet so as to be aligned vertically and horizontally, so that each of the holes is closed. , A flat elastic sphere is embedded therein, and wiring patterns extending from above the insulating sheet around the hole are provided along the upper and lower surfaces of the elastic body to the top surface, respectively.

According to a second aspect of the present invention, in the configuration of the first aspect, the hole in which the elastic body is buried is a through hole, and the wiring pattern is derived from the through hole. It is characterized by being formed along the elastic body from a derived pattern.

According to a third aspect of the present invention, in the configuration of the first aspect, the hole in which the elastic body is buried is a hole that is not a through hole, and the wiring pattern is located near the hole. It is characterized by being formed along the elastic body from the formed through hole.

According to a fourth aspect of the present invention, in the configuration of the third aspect, the wiring pattern is formed from a pattern formed on one surface of the insulating sheet.

[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.
1 is a plan view of an electric connector according to a first embodiment of the present invention, FIG. 2 is an enlarged plan view of a portion A in FIG. 1, FIG. 3 is a cross-sectional view showing a BB section in FIG. FIG. 3 is a cross-sectional view for explaining the operation of the electric connector.

First, the configuration of the first embodiment will be described. In FIG. 1, reference numeral 10 denotes an electrical connector. 1
Is an insulating sheet made of an epoxy resin, a polyimide resin or the like as a main body of the electrical connector 10. The dimensions of one insulating sheet are, for example, a thickness of 25 to 50 μm and an area of 5 × 1.
Although it is a large format of 0 cm, when it is used for mounting electronic components, it is cut to a necessary size as needed. A is a contact portion which is a conductive member for connecting electrodes arranged above and below the electrical connector 10. A large number of such contact portions A are provided on the insulating sheet 1 vertically and horizontally at a pitch of, for example, 0.3 mm.

Further, details of the contact portion A will be described. 2 and 3, reference numeral 2 denotes a flat spherical elastic body made of a material such as silicone rubber, urethane rubber, polyester rubber, or fluorine rubber. Reference numeral 3 denotes a through hole formed in the insulating sheet 1, and the elastic body 2 is fixed in the through hole 3. The size of the elastic body 2 is, for example, 0.2 mm in diameter,
The thickness is 0.1 mm. Reference numeral 4 denotes a connection pattern as a conductive member for connecting the electrode portion of the electronic component to the wiring pattern of the circuit board on which the electronic component is mounted. From BB
It extends in the direction.

Next, the operation of the first embodiment will be described with reference to FIG. In FIG. 4, reference numeral 30 denotes an electrode portion 30a.
Is a circuit board on which the semiconductor package 30 on which the electrode pattern 40a is formed so as to face the electrode portion 30a is mounted. The electrical connector 20 cut to a size suitable for the place to be used is mounted so as to be sandwiched between the semiconductor package 30 and the circuit board 40. Then, each electrode portion 30a and electrode pattern 4
The top of each connection pattern 4 included in the region 0a is in contact with both electrode portions to achieve conduction, and at the same time, the elastic body 2
Is in a compressed state.

Next, effects of the first embodiment will be described. Since each of the elastic members 2 is easily deformed, the elastic member 2 is easy to bend even if the load for compressing the electrical connector 10 is small, and the deformation is limited to only the elastic member 2 and does not reach the insulating sheet 1 main body. Even if the connection pattern 4 is deformed by bending of the connection pattern 2, the position in the plane direction does not change. In addition, the connection pattern 4 is a lead-out portion 5 of the insulating sheet 1 near the elastic body 2.
Since the elastic body 2 is flat and spherical, the rising portion from the insulating sheet 1 becomes gentle and does not break. In mounting the semiconductor package 30 shown in FIG.
Even if the heights of the plurality of electrode portions 30a and the plurality of electrode patterns 40a of the circuit board 40 vary, the top surface of the elastic body included in one electrode surface surely contacts the electrode surface. Will be.

Next, an electrical connector according to a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 5 is an enlarged plan view of a contact portion of the electric connector according to the second embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along line CC of FIG.

The configuration of the second embodiment will be described. In FIGS. 5 and 6, reference numeral 20 denotes an electrical connector, the whole of which is the same as in the first embodiment, and a description thereof is omitted. 11 is an insulating sheet. Hole 1 in insulating sheet 11
1a has been burned. Reference numeral 12 denotes a flat spherical elastic body embedded in the hole 11a. Reference numeral 13 denotes a through hole formed in the insulating sheet 11 near the hole 11a, and 15 conductor patterns are formed in the through hole 13. Reference numeral 14 denotes a strip-shaped connection pattern which is a wiring pattern formed from the conductor pattern 15 to the top surface of the elastic body 12.

Next, an electrical connector according to a third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 7 is an enlarged plan view of a contact portion of an electric connector according to a third embodiment of the present invention, and FIG. 8 is a sectional view taken along line DD of FIG.

The configuration of the third embodiment will be described. In FIGS. 7 and 8, reference numeral 30 denotes an electrical connector, which is entirely the same as in the first embodiment and will not be described. 21 is an insulating sheet. Hole 2 in insulating sheet 21
1a has been burned. Reference numeral 22 denotes a flat spherical elastic body buried in the hole 21a. Reference numeral 23 denotes a through hole formed in the insulating sheet 21 in the vicinity of the hole 21a, and 25 conductor patterns are formed on one surface of the through hole 23. Reference numeral 24 denotes a strip-shaped connection pattern which is a wiring pattern formed from the conductor pattern 25 to the top surface of the elastic body 22.

Next, an electrical connector according to a fourth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 9 is an enlarged sectional view of a contact portion of an electric connector according to a fourth embodiment of the present invention.

The configuration of the fourth embodiment will be described. FIG.
In the figure, reference numeral 40 denotes an electrical connector, the entirety of which is the same as in the first embodiment, and a description thereof will be omitted. Numeral 31 is a double insulating sheet. The insulating sheet 31 has a hole 31a. 32 is a flat spherical elastic body embedded in the hole 31a. Reference numeral 33 denotes a through hole formed in the insulating sheet 31 in the vicinity of the hole 31a. On the mating surface of the insulating sheet 31 around the through hole 33, 35 conductor patterns are formed to be exposed in the through hole 33. . Numeral 34 denotes an elastic body 32 from the conductor pattern
Is a strip-shaped connection pattern which is a wiring pattern formed over the top surface of the substrate.

As described above, the operation of the second to fourth embodiments,
The effect is substantially the same as that of the first embodiment, and therefore, the description is omitted.

[0024]

As described above, according to the present invention,
A flat spherical elastic body is buried in the hole of the insulating sheet and the connection pattern is formed so that it can crawl on the upper and lower surfaces of the elastic body. Therefore, even if the compressive load is small, reliable and stable electrical conduction can be secured. 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 a first embodiment of the present invention.

FIG. 2 is an enlarged plan view of a portion A in FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a cross-sectional view illustrating an operation of the electrical connector according to the first embodiment of the present invention.

FIG. 5 is a partial plan view of an electrical connector according to a second embodiment of the present invention.

FIG. 6 is a sectional view taken along the line CC of FIG. 5;

FIG. 7 is a partial plan view of an electric connector according to a third embodiment of the present invention.

8 is a sectional view taken along the line DD of FIG. 7;

FIG. 9 is a partial sectional view of an electrical connector according to a fourth embodiment of the present invention.

FIG. 10 is a plan view of a conventional electrical connector.

FIG. 11 is a partial sectional view of FIG. 10;

FIG. 12 is a cross-sectional view illustrating the operation of a conventional electrical connector.

FIG. 13 is a partial cross-sectional view of another conventional electrical connector.

[Explanation of symbols]

 1, 11, 21, 31 Insulating sheet 1a, 11a, 21a, 31a Hole 2, 12, 22, 32 Elastic body 3 Wiring pattern 4, 14 Connection pattern 5, 15 Conductor pattern 13 Through hole 10, 20, 30, 40 Electricity connector

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01R 12/16 H05K 1/18 U H05K 1/18 H01R 23/68 303E (72) Inventor Tsutomu Kojima Iwate 5-2-15-1 Mitake, Morioka-shi Citizen Iwatenai F-term (reference) 2G003 AA07 AG03 AG12 2G011 AA01 AA15 AA16 AB06 AB08 AC14 AE01 AE22 5E023 AA04 AA16 AA22 BB17 BB22 BB26 CC23 CC26 DD26H17 H17 H02 GG17 HH28 5E336 AA04 BB01 BC34 CC32 CC43 CC55 DD12 EE15 GG11

Claims (4)

[Claims] 1. An electrical connector comprising: an insulating sheet body; and a plurality of conductive members penetrated in a thickness direction of the insulating sheet body and embedded such that both end faces are exposed on the surface of the sheet body. In each of the holes is provided a hole provided in a line vertically and horizontally, a flat elastic sphere is buried so as to cover the inside of each hole, a wiring pattern extending from the insulating sheet around the hole. An electrical connector, wherein each of the elastic connectors is disposed along a top surface and a bottom surface of the elastic body. 2. The method according to claim 1, wherein the hole in which the elastic body is buried is a through hole, and the wiring pattern is formed along the elastic body from a lead pattern derived from the through hole. Item 2. The electrical connector according to Item 1. 3. The elastic body according to claim 1, wherein the hole embedded in the elastic body is a hole that is not a through hole, and the wiring pattern is formed along the elastic body from a through hole formed near the hole. The electrical connector according to claim 1, wherein 4. The electrical connector according to claim 3, wherein the wiring pattern is formed from a pattern formed on one surface of the insulating sheet.