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:
Jun. 30, 2009
Filed:
Aug. 13, 2008
Applicants:
Yukihiro Kanechika, Shunan, JP;
Masanobu Azuma, Shunan, JP;
Inventors:
Yukihiro Kanechika, Shunan, JP;
Masanobu Azuma, Shunan, JP;
Assignee:
Tokuyama Corporation, Shunan-shi, Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/581 (2006.01);
U.S. Cl.
CPC ...
Abstract
An aluminum nitride sintered body having resistance to plasma gas and high thermal conduction and having excellent optical properties. The aluminum nitride sintered body of the present invention is characterized in that the proportion of positrons which are annihilated within a period of 180 ps (picoseconds) in the aluminum nitride crystal, as determined in the defect analysis using a positron annihilation method, is not less than 90%, and the sintered body preferably has a thermal conductivity of not less than 200 W/mK.