Electrical connector for surface mounting

• US 4,954,873 A
• Filed: 01/25/1988
• Issued: 09/04/1990
• Est. Priority Date: 07/22/1985
• Status: Expired due to Fees

• Current Assignee: Digital Equipment Corporation (HP Inc.)
• Original Assignee: Digital Equipment Corporation (HP Inc.)
• Inventors: Lee, James, Beck, Richard, Lee, Chune, Hu, Edward
• Primary Examiner(s): Hille, Rolf
• Assistant Examiner(s): CLARK, SHEILA V
• Application Number:
  US07/147,779
• Time in Patent Office: 953 Days
• Field of Search: 357/67, 357/80, 357/72, 357/74, 174/68.5, 428/201, 428/209, 428/210, 428/247, 428/256, 428/304.4, 428/199, 428/300, 428/316, 361/414, 361/386, 361/398
• US Class Current: 257/702
• CPC Class Codes: H01R 13/2414 conductive elastomers
• CPC Class Codes: H01R 43/007 for elastomeric connecting elements
• CPC Class Codes: H01R 43/16 for manufacturing contact members, e.g. by punching and by bending

Abstract

An anisotropic elastomeric conductor is fabricated by stacking a plurality of first and second sheets, where the first sheets include a plurality of parallel electrically conductive fibers and the second sheets are composed of electrically insulating material. By introducing a curable elastomeric resin into the layered structure of sheets, and then curing the resin, a solid elastomeric block having a plurality of parallel electrically conductive fibers running its length is obtained. Individual elastomeric conductors suitable for interfacing between electronic components are obtained by slicing the block in a direction perpendicular to the conductors. The conductor slices so obtained are particularly suitable for interfacing between electronic devices having planar arrays of electrical contact pads.

Claims

1. An anisotropic elastomeric conductor, comprising a plurality of metal fibers in a matrix, wherein said metal conductors are oriented parallel to each other and said matrix includes both a fiber component and an elastomeric resin component, said anisotropic elastomeric conductor having peripheral dimensions in the range from 0.5 to 10 cm and a thickness in the range from 0.02 to 0.4 cm, wherein said thickness is defined by the direction of the metal fibers.

2. An anisotropic elastomeric conductor as in claim 1, wherein the metal fibers are arranged in a uniform pattern with an intermediate spacing in the range from 0.005 to 0.05 cm, and the metal fiber diameter is the range from 0.001 to 0.01 cm.

3. An anisotropic elastomeric conductor comprising:

a plurality of first and second sheets stacked together such that at least one second sheet separates adjacent first sheets, said first and second sheets are fabric woven from fibers so that interstitial gaps are formed between adjacent fibers;

said first sheets are fabric woven from electrically conductive fibers and electrically insulating fibers, the electrically conductive fibers running in one direction and the electrically insulating fibers running in the transverse direction;

said second sheets are fabric woven from electrically insulating fibers; and

an elastomeric resin disposed between adjacent sheets and within said interstitial gaps.

4. The anisotropic elastomeric conductor of claim 3 wherein said electrically conductive fibers have a diameter in the range of 0.001 to 0.010 cm inclusive.

5. The anisotropic elastomeric conductor of claim 3 wherein said electrically conductive fibers are spaced apart from each other between 0.005 to 0.050 cm inclusive.

6. The anisotropic elastomeric conductor of claim 3 wherein said interstitial gaps between said fibers are between 0.001 to 0.010 cm.

7. The anisotropic elastomeric conductor of claim 3 wherein the arrangement of electrically conductive fibers on at least two adjacent first sheets varies between said adjacent first sheets.

8. The anisotropic elastomeric conductor of claim 3 wherein said elastomeric resin is a thermoplastic resin selected from the group consisting of silicone rubbers, urethane rubbers, and latex rubbers.

9. The anisotropic elastomeric conductor of claim 3 wherein voids are formed in said conductors.

10. The anisotropic elastomeric conductor of claim 6 wherein the arrangement of electrically conductive fibers on at least two adjacent first sheets varies between said adjacent first sheets.

11. The anisotropic elastomeric conductor of claim 6 wherein voids are formed in said conductors.