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. 12, 2006
Filed:
Nov. 10, 2003
Applicants:
Naomi Teratani, Nagoya, JP;
Yuji Katsuda, Stuttgart, DE;
Inventors:
Naomi Teratani, Nagoya, JP;
Yuji Katsuda, Stuttgart, DE;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/581 (2006.01); C04B 35/582 (2006.01);
U.S. Cl.
CPC ...
Abstract
An aluminum nitride ceramic having a low volume resistivity at room temperature and a relatively low samarium content is provided. The aluminum nitride ceramic contains aluminum nitride as a main component and samarium in a converted content, calculated as samarium oxide, of 0.060 mole percent or lower. The aluminum nitride ceramic includes aluminum nitride particles and a samarium-aluminum composite oxide phase having a length of at least 7 μm.