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:
Jun. 22, 2010
Filed:
Dec. 10, 2009
Toshikazu Takeda, Omihachiman, JP;
Toshikazu Takeda, Omihachiman, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo,-shi, Kyoto-fu, JP;
Abstract
There is provided a dielectric ceramic composition that is a dielectric ceramic material used for a laminated ceramic capacitor; that can be co-fired with internal electrodes mainly composed of Ni at a temperature of 1300° C. or less; and that has a high dielectric constant, good temperature characteristics of capacitance in a range of −55 to 175° C., and a high resistivity ρ at 175° C. The dielectric ceramic composition includes a main component represented by a composition formula (1-a) (KNa)(SrBaCa)NbO-a(BaCa)TiO(where a, b, x, y, and z are all molar amounts and 0.3≦a≦0.8, 0≦b≦0.2, 0≦x<0.2, 0.1≦y≦0.5, 0.1≦z≦0.5, and 0.2≦y+z≦0.7); and M, as an additional component, in an amount of 0.1 to 40 parts by mole relative to 100 parts by mole of the main component (where M is at least one element from the group of V, Mn, Cr, Fe, Co, Ni, Zn, Mg, and Si).