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. 03, 2009
Filed:
Nov. 07, 2006
Kazushige Ito, Yokohama, JP;
Akira Sato, Sakae, JP;
Akitoshi Yoshii, Akita-Ken, JP;
Masayuki Okabe, Nikaho, JP;
Atsushi Takeda, Akita, JP;
Takaki Shinkawa, Nipaho, JP;
Kazushige Ito, Yokohama, JP;
Akira Sato, Sakae, JP;
Akitoshi Yoshii, Akita-Ken, JP;
Masayuki Okabe, Nikaho, JP;
Atsushi Takeda, Akita, JP;
Takaki Shinkawa, Nipaho, JP;
TDK Corporation, Tokyo, JP;
Abstract
A dielectric ceramic composition including dielectric particles comprising a main ingredient phase having barium titanate as its main ingredient and a diffusion phase present at the periphery of said main ingredient phase, wherein when an average value of the depth where sub ingredient elements present at said diffusion phase diffuses from a surface of said diffusion phase toward a center of said dielectric particle is designated as an average diffusion depth, a dispersion of the average diffusion depth among the dielectric particles is, in terms of CV value, 5 to 30%. According to the present invention, an electronic device excellent in all of the dielectric constant, high temperature accelerated life, TC bias, and IR temperature dependency can be provided.