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:
Jan. 11, 2000
Filed:
Sep. 30, 1997
Applicant:
Inventors:
Assignee:
Bridgestone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423345 ; 264625 ;
Abstract
A wafer employing a silicon carbide sintered body is provided. The density of the silicon carbide sintered body is 2.9 g/cm.sup.3 or more. The silicon carbide sintered body is obtained by sintering a mixture in which silicon carbide powder and a non-metal-based sintering additive are mixed uniformly. The non-metal-based sintering additive is formed of an organic compound which generates carbon upon heating or the like. As a result, a wafer with excellent heat resistance and acid resistance and which causes little contamination is provided.