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:
Sep. 12, 2000
Filed:
Mar. 26, 1998
TDK Corporation, Tokyo, JP;
Abstract
A non-reductive dielectric ceramic material having a main component represented by [(Ca.sub.X Sr.sub.1-X)O].sub.m [(Ti.sub.Y Zr.sub.1-Y)O.sub.2 ] wherein X, Y and m fulfills 0.ltoreq.X.ltoreq.1, 0.ltoreq.Y.ltoreq.0.10 and 0.75.ltoreq.m.ltoreq.1.04, and auxiliary component containing 0.2-5 mol % (calculated MnO) of Mn oxide, 0.1-10 mol % (calculated as Al.sub.2 O.sub.3) of Al oxide and 0.5-15 mol % of a component of formula [(Ba.sub.Z Ca.sub.1-Z)O].sub.V SiO.sub.2 wherein 0.ltoreq.Z.ltoreq.1 and 0.5.ltoreq.V.ltoreq.4.0; and when used in a laminated ceramic condenser using a base metal such as Ni as inner electrode, can be sintered at a temperature not exceeding 1,300.degree. C., shows a small temperature coefficient of capacitance, can be controlled arbitrarily in the range of -150 to +150 ppm/.degree. C., has a specific resistance of no less than 1.times.10.sup.13 .OMEGA.cm at 25.degree. C., displays a small frequency-dependence of dielectric constant and dielectric loss tangent (tan .delta.) and has a long accelerated lifetime of insulating resistance.