US 7,465,491 B2
Anisotropic conductive sheet and its manufacturing method
Miki Hasegawa, Aichi (Japan); and Takeshi Watanabe, Aichi (Japan)
Assigned to J.S.T. Mfg. Co., Ltd., Osaka (Japan)
Appl. No. 10/508,049
PCT Filed Mar. 20, 2003, PCT No. PCT/JP03/03462
§ 371(c)(1), (2), (4) Date Mar. 07, 2005,
PCT Pub. No. WO03/079496, PCT Pub. Date Sep. 25, 2003.
Claims priority of application No. 2002-079748 (JP), filed on Mar. 20, 2002.
Prior Publication US 2005/0145974 A1, Jul. 07, 2005
Int. Cl. B32B 5/00 (2006.01)
U.S. Cl. 428—332  [428/323] 4 Claims
OG exemplary drawing
 
1. An anisotropic conductive sheet expanding on a first plane, wherein: when a first direction contained in said first plane is denoted as X-direction, a direction orthogonal to X-direction and contained in said first plane is denoted as Y-direction and a direction orthogonal to X-direction and Y-direction is denoted as Z-direction, and the anisotropic conductive sheet has a predetermined thickness in Z-direction and a front surface and a back surface substantially in parallel with said first plane, the anisotropic conductive sheet comprising:
strip-like members of a striped pattern having a width in Y-direction and extending in X-direction and conductive pieces having electric conductivity and nonconductive pieces alternately arranged in X-direction;
nonconductive strip-like members having a width in Y-direction and extending in X-direction, wherein the strip-like members and the nonconductive strip-like members are arranged relative to each other in Y-direction, and
wherein in said strip-like members of a striped pattern, a conductive auxiliary layer is arranged between the conductive piece and the nonconductive piece while in contact with said conductive piece so that the conductive piece is sandwiched between the conductive auxiliary layers;
a thickness of the conductive auxiliary layer is not greater than 1/50 of the conductive piece;
said conductive auxiliary layer includes a conductive layer and adhesive layers disposed at both sides of the conductive layer extending in Y-direction; and
said conductive pieces and the conductive auxiliary layer extend in Z-direction so as to penetrate the anisotropic conductive sheet from the front surface to the back surface.