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. 12, 1991
Filed:
Nov. 26, 1990
Applicant:
Inventors:
Cornelis W Berghout, Eindhoven, NL;
Silvester J Oostra, Eindhoven, NL;
Hendrik Damsma, Eindhoven, NL;
Assignee:
U.S. Philips Corp., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C09K / ; H01L / ;
U.S. Cl.
CPC ...
361321 ; 29 2542 ; 501137 ; 252 / ;
Abstract
A ceramic body of a dielectric material on the basis of barium titanate comprises 0.2 to 0.5 atom % of antimony and/or cerium as the donor material. The grain size of the dielectric material is less than 2 .mu.m. The dielectric constant of the material exceeds 3500 and the material has a high electric resistance which is maintained at a high temperature and for a long period of time. The ceramic material is suitable for use in capacitors, in particular ultilayer capacitors.