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, 2005
Filed:
Sep. 27, 2002
Hiroaki Matoba, Moriyama, JP;
Atsushi Sano, Shiga-ken, JP;
Hiroshi Tamura, Otsu, JP;
Abstract
A dielectric ceramic composition having a high maximum relative dielectric constant, a superior temperature characteristic of capacitance and a high AC breakdown voltage, and a capacitor using the same are provided. The dielectric ceramic composition includes a polycrystalline solid solution which contains barium titanate as a primary component and which is represented by the formula (BaCa)(TiZr)Oin which 0<x≦0.25 and 0<y≦0.25 are satisfied. The dielectric ceramic composition also includes, with respect to 100 parts by weight of the primary component, a Y component in the form of YOin an amount in the range of more than zero to about 5 parts by weight; a Mg component in the form of MgO in an amount in the range of more than zero to about 2 parts by weight, and an Al component in the form of AlOin an amount in the range of more than zero to about 2.5 parts by weight.