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:
Nov. 11, 2003
Filed:
Oct. 31, 2001
Applicant:
Inventors:
Koichi Tanaka, Kokubu, JP;
Takero Fukudome, Kokubu, JP;
Assignee:
Kyocera Corporation, Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 9/00 ;
U.S. Cl.
CPC ...
B32B 9/00 ;
Abstract
A surface-coated sintered body of silicon nitride wherein a coating layer on the surface comprises a crystalline phase of RE Si O and/or RE SiO (RE=rare earth element), the crystalline phase having an average crystalline particle diameter of not smaller than 0.1 &mgr;m, and the excess amount of SiO contained in the coating layer being not larger than 10 mole %. The coating layer formed on the surfaces of the sintered body exhibits excellent adhering force even in a high-temperature zone of around 1500° C. and features a long life.