Anisotropically conductive sheet, production process thereof and connector

• US 6,690,564 B1
• Filed: 09/14/2000
• Issued: 02/10/2004
• Est. Priority Date: 09/17/1999
• Status: Expired due to Term

• Current Assignee: ISC Incorporated (Svenska Cellulosa AB SCA)
• Original Assignee: JSR Corporation
• Inventors: Yasuda, Naoshi, Haruta, Yuichi
• Primary Examiner(s): Jackson, Stephen W.
• Application Number:
  US09/662,122
• Time in Patent Office: 1,244 Days
• Field of Search: 361/220, 361/212, 361/56, 361/58, 361/115, 361/100, 361/127
• US Class Current: 361/212
• CPC Class Codes: H01L 2224/16 of an individual bump connector
• CPC Class Codes: H01L 2924/15174 in different layers of the multilayer substrate
• CPC Class Codes: H01R 12/52 connecting to other rigid printed circuits or like structures
• CPC Class Codes: H01R 13/2414 conductive elastomers
• CPC Class Codes: H01R 43/007 for elastomeric connecting elements

Abstract

Disclosed herein is an anisotropically conductive sheet that exhibits conductivity in its thickness-wise direction, and is suitably used as a connector.

The anisotropically conductive sheet of the first feature may comprise a plurality of columner conductive parts extending in the thickness-wise direction and a semiconductive part that exhibits semiconductivity in its plane direction. In the sheet, respective conductive parts may be surrounded by the semiconductive part with an insulating part therebetween. The sheet may comprise conductive particles contained in a sheet member exhibiting semiconductivity in a state oriented so as to be arranged in the thickness-wise direction thereof.

The sheet of the second feature has a static charge-eliminating layer integrally provided on the surface of a sheet member.

The sheet of the third feature has a conductive part for static-charge elimination to be connected to a ground.

The sheet can inhibit static electricity from being accumulated on the surface thereof.

Claims

1. An anisotropically conductive sheet comprising an anisotropically conductive sheet member having conductivity in its thickness-wise direction and a static charge-eliminating layer integrally provided on at least one surface of the sheet member.

4. The anisotropically conductive sheet according to claim 1, wherein the static charge-eliminating layer is composed of a layer containing a conductive organic substance, anine type organic conductive substance, metal or carbon black, a layer of a thermosetting resin or thermoplastic resin containing a conductive substance therein, or a layer formed of a conductive polymer.

5. The anisotropically conductive sheet according to claim 1, wherein the static charge-eliminating layer is formed of a metallic layer.

6. The anisotropically conductive sheet according to claim 1, wherein the static charge-eliminating layer is formed of a layer, which contains a sodium salt of an alkylsulfonic acid.

7. A process for producing the anisotropically conductive sheet according to claim 1, comprises the steps of coating a sheet member with a flowable composition for forming a static charge-eliminating layer, which contains a conductive substance and a binder or a curable material which will become a binder to form a coating film, and then subjecting the coating film to a drying treatment and/or a curing treatment, thereby forming the static charge-eliminating layer.

8. A process for producing the anisotropically conductive sheet according to claim 1, which comprises the steps of bonding a film for static charge-eliminating layer to become a static charge-eliminating layer to a sheet member, thereby forming the static charge-eliminating layer.

9. A connector formed of the anisotropically conductive sheet according claim 1.

10. A method for inspecting a circuit device, which comprises conducting electrical inspection of the circuit 3 device using the connector according to claim 9.

2. An anisotropically conductive sheet comprising an anisotropically conductive sheet member provided with a plurality of conductive parts each extending in the thickness-wise direction of the sheet member in a state mutually insulated by insulating parts, and a static charge-eliminating layer provided on at least one surface of each of the insulating parts in the sheet member.

3. The anisotropically conductive sheet according to claim 2, wherein the static charge-eliminating layer is provided on the insulating parts in the sheet member.

11. An anisotropically conductive sheet comprising an anisotropically conductive sheet member having conductivity in the thickness-wise direction of the sheet member and formed of an elastic polymeric substance, a conductive part for connection to be connected to an external device or terminal of an electronic part, and at least one conductive part for static-charge elimination to be connected to a ground.

12. The anisotropically conductive sheet according to claim 11, wherein the sheet member is provided with a plurality of conductive parts for connection each extending in the thickness-wise direction of the sheet member in a state mutually insulated by insulating parts, and the conductive part for static-charge elimination is arranged in a blank region outside a region, in which the conductive part for connection is arranged, in the sheet member.

13. The anisotropically conductive sheet according to claim 11, wherein the sheet member is constructed by arranging at least one conductive part for static-charge elimination in a state dispersively in the blank region.

14. The anisotropically conductive sheet according to claim 11, wherein the sheet member is constructed by arranging at least one conductive part for static-charge elimination about the region in which the conductive part for connection is arranged.

15. The anisotropically conductive sheet according to claim 11, wherein the conductive parts for static-charge elimination contains at least one conductive substance selected from among metallic particles, conductive metal oxides, conductive organic substances and carbon black.

16. The anisotropically conductive sheet according to claim 11, wherein the conductive parts for static-charge elimination have the same structure as the conductive part for connection.

17. The anisotropically conductive sheet according to claim 11, wherein the conductive parts for static-charge elimination have the same composition as the conductive part for connection.

18. A connector formed of the anisotropically conductive sheet according claim 11.

19. A method for inspecting a circuit device, which comprises conducting electrical inspection of the circuit device using the connector according to claim 18.