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:
Sep. 10, 2002
Filed:
Aug. 28, 1998
Applicant:
Inventor:
Akira Yamakawa, Itami, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 1/504 ;
U.S. Cl.
CPC ...
B32B 1/504 ;
Abstract
A highly reliable metallized Si N ceramic having a metallizing layer of high bonding strength on the surface of a highly heat-conductive, mechanically-strong Si N ceramic. A metallizing layer including 0.01 to 20% silicon by weight in terms of silicon is formed on the surface of a silicon nitride ceramic including 0.01 to 10% free silicon by weight and having a thermal conductivity of 50 W/mK or more and a bending strength of 600 MPa or more. The silicon component in the metallizing layer is either introduced from the silicon nitride ceramic by diffusion or included in a metallizing paste beforehand.