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:
May. 07, 2002
Filed:
Mar. 16, 2000
Applicant:
Inventors:
Yoshiki Obana, Chiba, JP;
Atsuo Hiroi, Chiba, JP;
Kazunari Watanabe, Chiba, JP;
Mikio Ueki, Chiba, JP;
Yukihiro Kitamura, Tokyo, JP;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
C04B 3/5581 ; C04B 3/5582 ;
U.S. Cl.
CPC ...
C04B 3/5581 ; C04B 3/5582 ;
Abstract
An aluminum nitride sintered product which is made mainly of aluminum nitride and contains an yttrium compound in an amount of from 0.6 to 5 wt % as calculated as yttrium oxide, a vanadium compound in an amount of from 0.02 to 0.4 wt % as calculated as vanadium and carbon in an amount of from 0.03 to 0.10 wt % and which has a three-point bending strength of at least 45 kg/mm and a thermal conductivity of at least 150 W/m·K, wherein crystal grains of aluminum nitride have an average grain size of at most 5 &mgr;m.