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:
Mar. 26, 1991
Filed:
Dec. 20, 1989
Applicant:
Inventors:
Akira Yamada, Amagasaki, JP;
Susumu Kawamata, Amagasaki, JP;
Hirosi Nakajo, Amagasaki, JP;
Hisao Watarai, Amagasaki, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G04B / ;
U.S. Cl.
CPC ...
501136 ; 501135 ;
Abstract
A dielectric ceramics for high frequencies having its dielectric constant of as high as 80 and a sufficiently high Q value (1/dielectric loss) of 1,000 or above, even in a micro-wave region, which is a compound having a structure of Sr.sub.3 Ti.sub.2 O.sub.7, and being represented by the following general formula: Sr.sub.3(1-x) Ca.sub.3x Ti.sub.2 O.sub.7 (where: 0.1<x.ltoreq.0.55).