公开(公告)号：US20240300819A1

公开(公告)日：2024-09-12

申请号：US18552398

申请日：2021-11-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Youji SHIRATO ,  Norihiro KAWAMURA ,  Yuji YAMAGISHI ,  Mitsuru TAMAOKI

IPC: C01B32/21 ,  H01L23/00 ,  H01L23/42 ,  H05K7/20

CPC classification number: C01B32/21 ,  H05K7/2039 ,  C01P2004/03 ,  C01P2006/90 ,  H01L23/42 ,  H01L24/29 ,  H01L24/32 ,  H01L2224/29193 ,  H01L2224/32245

Abstract: The problem to be overcome by the present disclosure is to provide a graphite sheet with the ability to lower the contact thermal resistance at the surface of the graphite sheet. In a graphite sheet, a plurality of graphite layers are stacked one on top of another in a thickness direction. The plurality of graphite layers includes: a first graphite layer that forms an outermost layer of the graphite sheet; and a second graphite layer other than the first graphite layer. At least a part of the second graphite layer is exposed through a surface of the first graphite layer. The graphite sheet has an apparent shear strength equal to or greater than 0.1 MPa and equal to or less than 0.5 MPa as measured by SAICAS method from a depth of 0.5 m to a depth of 19 m.