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:
Jul. 11, 2000
Filed:
Dec. 01, 1998
U.S. Philips Corporation, New York, NY (US);
Abstract
A dielectric ceramic composition including a compound of the BaTiO.sub.3 --Nb.sub.2 O.sub.5 --Co.sub.3 O.sub.4 group. The composition contains 1.1-1.4 mo. % of in total Nb.sub.2 O.sub.5 and Co.sub.3 O.sub.4 wherein the molar ration of Nb.sub.2 O.sub.5 to Co.sub.3 O.sub.4 is between 4.4 and 5.0. The composition contains 0.02-0.06% by weight of MnCO.sub.3, 0.02-0.25% by weight of Nd.sub.2 O.sub.3, 0.02-0.10% by weight of Y.sub.2 O.sub.3 and 0.05-0.15% by weight of Al.sub.2 O.sub.3 with respect to the weight of the composition. Laminated ceramic capacitors including the dielectric ceramic material show a capacity changing ration which is less than 15% in the temperature range between -55.degree. C. and +125.degree. C., a dielectric loss which is smaller than 3.5% and a dielectric constant which is 4000 or more.