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:
Apr. 22, 1997
Filed:
Feb. 10, 1994
Applicant:
Inventors:
Shoji Kozuka, Kawasaki, JP;
Masaru Hayashi, Yokohama, JP;
Katsuyoshi Oh-Ishi, Kawasaki, JP;
Takaaki Yasumoto, Kawasaki, JP;
Nobuo Iwase, Kamakura, JP;
Hiroshi Endo, Yokohama, JP;
Koji Yamakawa, Kawasaki, JP;
Kaoru Koiwa, Kawasaki, JP;
Kiyoshi Iyogi, Kawasaki, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428209 ; 428901 ; 1741 / ; 1741 / ; 3613213 ; 3613215 ; 361765 ; 361777 ; 501 15 ; 501153 ;
Abstract
According to this invention, there is disclosed a thermal conductivity substrate which includes an aluminum nitride sintered body and a coating layer formed on the body of aluminum phosphate and having a surface roughness of 1 .mu.m or less, and which has excellent humidity resistance and chemical resistance.