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. 03, 2008
Filed:
Nov. 29, 2005
Kazushige Ito, Chuo-ku, JP;
Akira Sato, Chuo-ku, JP;
Kazushige Ito, Chuo-ku, JP;
Akira Sato, Chuo-ku, JP;
TDK Corporation, Tokyo, JP;
Abstract
An object of the invention is to provide a multilayer ceramic capacitor having high dielectric constant, good temperature characteristic, and an improved IR temperature dependency. According to the present invention, a capacitor device body, wherein dielectric layerscomprising dielectric ceramic composition and internal electrode layersare alternately laminated, characterized in that said dielectric ceramic composition comprises a plural number of crystal particleswherein said crystal particlesform Ca dispersing areawherein at least said Ca is dispersed from the surface to inside of crystal particles, and when considering crystal particleshaving an average particle diameter of D50, an average depth T of said Ca dispersing area is controlled within a range of 10 to 30% with respect to the average particle diameter of D50, is provided.