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. 28, 1989
Filed:
Mar. 29, 1988
Applicant:
Inventors:
Hideki Sato, Yokohama, JP;
Nobuyuki Mizunoya, Yokohama, JP;
Hironori Asai, Kawasaki, JP;
Kazuo Anzai, Tokyo, JP;
Tsuyoshi Hatano, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428209 ; 428210 ; 428698 ; 428901 ; 428704 ; 428472 ; 4284722 ; 428699 ; 428701 ; 174 685 ;
Abstract
One aspect of the present invention is directed to an aluminum nitride ceramic substrate which comprises an aluminum nitride ceramic sheet and a conductive metallized layer formed thereon. The metallized layer comprises molybdenum and/or tungsten and contains a compound containing yttria and alumina in the vicinity of the interface between the aluminum nitride ceramic sintered sheet and the conductive metallized layer.