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. 06, 1982
Filed:
Jul. 03, 1980
Applicant:
Inventors:
Harufumi Mandai, Nagaokakyo, JP;
Kunitaro Nishimura, Nagaokakyo, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; C04B / ;
U.S. Cl.
CPC ...
428148 ; 252 / ; 357 61 ; 428409 ; 428472 ; 501123 ; 501136 ;
Abstract
A semiconductor ceramic composition for boundary layer capacitors which consists essentially of 99.6 to 99.995 wt. % of a semiconductor ceramic component consisting of strontium titanate or modified strontium titanate solid solution and at least one semiconductorizing agent, and 0.005 to 0.1 wt. % of phosphorus together with or without 0.015 to 0.3 wt. % of copper is disclosed. The composition makes it possible to produce boundary layer capacitors having high permittivity and high breakdown voltage at high percent non-defective.