The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 2004
Filed:
Aug. 12, 2002
Applicant:
Inventor:
Natsuko Ishihara, Tokyo, JP;
Assignee:
Polymatech Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 3/55833 ;
U.S. Cl.
CPC ...
C04B 3/55833 ;
Abstract
A thermally conductive sheet comprising boron nitride powder as a first thermally conductive filler dispersed into an organic matrix, wherein the boron nitride powder is hexagonal boron nitride (h-BN), and comprises primary particles and secondary aggregates formed by aggregation of the primary particles, wherein at least part of the secondary aggregates being 50 &mgr;m or more in size. The boron nitride powder preferably includes 1 to 20 percent by weight of secondary aggregates of 50 &mgr;m or more in size. The organic matrix material is preferably silicone rubber.