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:
Mar. 07, 2006
Filed:
Mar. 24, 2003
Norio Sasaki, Tokyo, JP;
Yoshiharu Watanabe, Tokyo, JP;
Norio Sasaki, Tokyo, JP;
Yoshiharu Watanabe, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A high permittivity dielectric ceramic composition wherein a main component includes BaTiO: 74.24 to 79.97 mol %, BaZrO: 5.69 to 12.04 mol %, CaTiO: 7.84 to 12.13 mol %, MgTiO: 3.11 to 4.72 mol % and BiTiO: 0.10 to 0.60 mol %. With respect to 100 wt % of the main component, 0.1 or less (excepting 0) of NiO, 0.1 wt % or less (excepting 0) of CeO, and 0.2 wt % or less (excepting 0) of MnO are included. In accordance with need, 0.2 wt % or less (excepting 0) of SiOis further included with respect to 100 wt % of the main component. A high relative permittivity, such as 9000 or more, a high AC breakdown voltage, and a small electrostatic capacity change rage with respect to temperature can be obtained.