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:
Oct. 07, 1997
Filed:
Jan. 19, 1996
Applicant:
Inventors:
Masaharu Nishiura, Kawasaki, JP;
Shigemasa Saito, Kawasaki, JP;
Akira Morozumi, Kawasaki, JP;
Shizuyasu Yosida, Kawasaki, JP;
Katumi Yamada, Kawasaki, JP;
Toshio Nozaki, Mine, JP;
Hiroshi Miyama, Mine, JP;
Seigo Oiwa, Mine, JP;
Kazuya Matuura, Mine, JP;
Kazuhiko Teramura, Mine, JP;
Assignees:
Fuji Electric Co., Ltd., Kanagawa, JP;
Sumitomo Metal Ceramics Inc., Yamaguchi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
257701 ; 257705 ; 257706 ; 257714 ;
Abstract
A ceramic substrate is a high-temperature fired body consisting of alumina as the main component, zirconia, and a ceramics sintering assisting agent. The assisting agent is one of yttria, calcia, magnesia, and ceria, in which yttria is added at 0.1-2 wt %, calcia is added at 0.02-0.5 wt %, magnesia is added at 0.02-0.4 wt %, and ceria is added at 0.02-0.5 wt %.