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. 01, 1988
Filed:
Nov. 14, 1986
Keiichi Noi, Tsuzuki, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A voltage-dependent non-linear resistance ceramic composition comprises SrTiO.sub.3, Sr.sub.1-x Ba.sub.x TiO.sub.3 (0.001.ltoreq.x.ltoreq.0.300) or Sr.sub.1-x Ca.sub.x TiO.sub.3 (0.001.ltoreq.x.ltoreq.0.300) as host material and further includes 0.001-2.000 mol % of Y.sub.2 O.sub.3 as metal oxide for semiconductorization acceleration, 0.001-3.000 mol % of metal oxide(s) of at least one selected from the group consisting of Ca.sub.2 O.sub.3, CuO, Ag.sub.2 O, Al.sub.2 O.sub.3, ZrO.sub.2, Bao, SiO.sub.2, MgO, B.sub.2 O.sub.3, MnO.sub.2, NiO, MoO.sub.3 BeO, Fe.sub.2 O.sub.3, Li.sub.2 O, Cr.sub.2 O.sub.3, PbO, CaO, TiO.sub.2, P.sub.2 O.sub.5, Sb.sub.2 O.sub.3 and V.sub.2 O.sub.5, which segregates at grain boundary to make the grain boundary selectively to high resistances; an element made of the composition has both characteristics of capacitance and varistor, and is suitable for filter to remove noise or surge.