JP3007148U - Guided electrical connector - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide at low cost an electrical connector equipped with a guide that allows a surface-mounted LSI to be easily incorporated and connected to the electrical connector. [Structure] The metal wire 2 is parallel to the insulating elastomer layer 3 in the thickness direction while keeping a constant pitch, and both ends 4 and 5 thereof are exposed and buried, and the periphery is surrounded by a frame 6. Surface mount type L for electrical connector
Guide 7 for aligning and holding SI package 13
Is provided on the frame 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric connector with a guide used for connecting a surface mount type LSI package (hereinafter referred to as an LSI) to an electronic circuit board for inspection or practical use.

[0002]

[Prior art]

 Conventionally, in order to connect an LSI to an electronic circuit board, a dedicated electric connector having connection terminals matched with the arrangement of the connection terminals of this LSI was visually aligned with both terminals and compressed.

[0003]

[Problems to be solved by the device]

 However, with the recent increase in the number of connection terminals of LSIs (increased number of pins) and miniaturization of pitches, such visual alignment requires time and is inefficient in work efficiency, and requires accurate knowledge from a skilled person. It was difficult to make a connection. Therefore, a method using a highly accurate positioning jig has been proposed, but it has a disadvantage of increasing cost.

[0004]

[Means for Solving the Problems]

 The present invention aims to provide an electric connector which can easily and accurately hold an LSI in a predetermined position without requiring special skill, in which a metal wire is used as an insulating elastomer. In the electrical connector, which is parallel to the other in the thickness direction of the layer while keeping a constant pitch, is buried with its both ends exposed and is surrounded by a frame, the frame positions the surface mount LSI package. The gist of the electrical connector with a guide is that the guide is provided so as to be held together, and the guide is detachable from the frame.

The electrical connector with a guide of the present invention will be described below with reference to the drawings. In FIGS. 1A and 1B, reference numeral 1 is the electrical connector with a guide of the present invention, in which a metal wire 2 is an insulating elastomer layer (hereinafter referred to as an elastomer). The layers (referred to as layers) 3 are embedded parallel to each other while keeping a constant pitch in the thickness direction. One end of the metal wire 2 has a bond end 4 formed by a wire bonder, and the other end has a spherical end 5 formed by laser processing. Both ends are exposed on both surfaces of the elastomer layer 3. The frame 6 surrounds the elastomer layer 3, and a guide 7 having an inverted L-shaped cross section is formed on the frame 6.

When an LSI is connected to an electronic circuit board using the guided electrical connector of the present invention, the entire connector is compressed by about 10% to ensure contact, but at this time, the compressive load is made as small as possible and In order to uniformly and evenly compress the wire 2 and the elastomer layer 3, it is necessary to provide a clearance 9 between the inner surface 8 of the protruding portion of the guide 7 and the surface of the elastomer layer 3 as an escape area for the insulating elastomer. The clearance 9 is preferably about 0.2 to 1.0 mm because it is necessary to make the elastomer layer 3 as thin as possible. The length L of the protruding portion of the guide 7 is preferably 1.0 to 5.0 mm in order to downsize the connector. The tip 10 of the protruding portion of the guide 7 may be set so as to match the shape and size of the LSI to be held, and may have a semicircular cross section as shown in FIG. The guide 7 does not always hold the four sides of the LSI, but if the guide 7 holds the three sides as shown in FIG. 1D, the insertion and removal of the LSI becomes easy.

It is preferable that the electric connector with a guide of the present invention is specialized for each shape and size of the LSI to be connected because the mounting density is increased and the electronic circuit board can be downsized. However, if the guide 7 is integrated with the frame 6, the effect of cost reduction due to mass productivity can be obtained. However, when the electric connector with a guide of the present invention is used for inspection of various LSIs, the guide 7 and the frame 6 are not integrated, but the fixing pin 11 is used as shown in FIG. 2A, or (b). It is preferable from the viewpoint of cost and workability such as setup that it is possible to attach / detach with the screw 12 and select the guide according to the shape and size of each LSI as shown in FIG.

Examples of the material used for the elastomer layer include thermosetting resins such as silicone resin and epoxy resin, synthetic rubber or thermoplastic resins such as polyethylene, ABS, and polycarbonate resin, but sufficient flexibility, Considering that it is required to have compression characteristics, heat resistance, and the like, and that it has good workability and a Shore A hardness of 20 to 70 ° H, the liquid silicone resin is most suitable.

The material of the frame and the guide is appropriately selected from thermosetting resins such as polyimide, phenol resin, epoxy resin and urethane resin, or thermoplastic resins such as polyvinyl chloride, polycarbonate and ABS. Good.

As for the metal wire, it is sufficient if it has conductivity, and examples of the material include gold, copper, aluminum, gold-palladium alloy, nickel wire, or plated products thereof, but electrical resistance and workability are Gold wire is preferable in consideration. The shape of the metal wire may be linear, S-shaped, spring-shaped or the like.

[0011]

[Action]

When actually using the guided electrical connector of the present invention, for example, as shown in FIG. 3, if the LSI 13 is inserted between the guides 7 of the dedicated connector, the connecting terminals 14 of the LSI are automatically connected to the connector. It is possible to make accurate contact with the spherical terminal 5. Next, the connector 1 holding this LSI is placed on the electronic circuit board 15 to be connected, and the bond end 4 of the connector is brought into contact with the connection terminal 16 of the connector. Connection is obtained.

[0012]

【Example】

 Using a known wire bonder, a metal wire (76 μm in diameter, 2.1 mm in length, gold wire) with a thickness of 0.5 mm on a copper forming substrate with a thickness of 0.5 mm was formed into a square area with a side length of 24 mm at a 2.0 mm pitch. After metal bonding, the tip of the metal wire was irradiated with laser light to form a spherical end having a diameter of 150 μm. Next, using polyimide, a square frame having a thickness of 2.0 mm, a width of 5.0 mm, and an outer shape of 34 mm on a side is prepared, and a guide (made of polyimide) is attached to the three sides of the square frame with fixing pins. I got it. Next, an insulating elastomer containing 2-liquid silicone rubber KE-109A / B (manufactured by Shin-Etsu Chemical Co., Ltd., trade name) mixed with liquid A and liquid B in equal proportions was placed in a frame by a dispenser for about 2 mm. Was injected to such an extent that the spherical end portion was left exposed, and was heated to 130 ° C. to be cured to form an elastomer layer. Then, the copper forming substrate was removed by etching with ferric chloride to expose the bond ends. In this case, the clearance of the electrical connector with a guide is 0.5 mm, and the length of the protruding portion of the guide is 3.0 mm. A BGA type LSI was connected to an electronic circuit board using this electrical connector with a guide, and a very good connection could be obtained by a simple operation.

[0013]

[Effect of device]

 The electrical connector with a guide of the present invention, when connecting with an LSI, can evenly compress the entire surface of the connector by applying a minimum compressive load to the LSI, and it will not compress more than necessary, thus destroying the LSI. In addition, the positioning of the LSI is easy and accurate by guiding the LSI, which has a great effect on the improvement of workability and the reliability of the quality of the LSI.

[Brief description of drawings]

1A is a plan view of an electric connector with a guide according to an embodiment of the present invention, FIG. 1B is a sectional view taken along line XX of FIG. 1A, and FIG. 1C is a guide according to another embodiment. A sectional view of an electric connector with a guide, (d) is a plan view of an electric connector with a guide according to still another embodiment.

2A and 2B are explanatory views of a method of attaching the detachable guide and the frame of the electric connector with a guide of the present invention.

FIG. 3 is an LSI using the electric connector with a guide of the present invention.
FIG. 3 is an explanatory view of the connection between the electronic circuit board and the electronic circuit board.

[Explanation of reference numerals] 1 ... Electrical connector with guide 10 ... Tip of protrusion 2 ... Metal wire 11 ... Fixing pin 3 ...
Elastomer layer 12 ... Screw 4 ... Bond end 13 ... LSI 5 ... Spherical end 14 ... Connection terminal 6 ... Frame 15 ... Electronic circuit board 7 ... Guide 16 ... Connection terminal 8 ... Inner surface of protrusion L ... Of protrusion of guide Length 9 ... Clearance

Front page continued (72) Kenji Shiba Kenji Shiba 2146-5 Kanaishi Hirooka, Shiojiri City, Nagano Prefecture Shinano Polymer Co., Ltd. Technical Department (72) Hiroto Komatsu 1-406-1 Yoshinocho, Omiya-shi, Saitama Shin-Etsu Polymer Tokyo Factory Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. An electrical connector in which metal wires are parallel to each other in a thickness direction of an insulating elastomer layer while keeping a constant pitch, and both ends thereof are exposed and buried, and a periphery is surrounded by a frame, An electrical connector with a guide, wherein the frame includes a guide for aligning and holding a surface mount type LSI package. 2. An electrical connector in which metal wires are parallel to each other in the thickness direction of the insulating elastomer layer while keeping a constant pitch, and both ends thereof are exposed and buried, and the periphery is surrounded by a frame, An electric connector with a guide, wherein the frame includes a guide for aligning and holding a surface-mount type LSI package, and the guide is attachable to and detachable from the frame.