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:
Sep. 08, 2009
Filed:
Nov. 10, 2008
Kazushige Ito, Yokohama, JP;
Akira Sato, Inbagan, JP;
Akitoshi Yoshii, Akita-ken, JP;
Masayuki Okabe, Nikaho, JP;
Atsushi Takeda, Akita, JP;
Takaki Shinkawa, Nikaho, JP;
Kazushige Ito, Yokohama, JP;
Akira Sato, Inbagan, JP;
Akitoshi Yoshii, Akita-ken, JP;
Masayuki Okabe, Nikaho, JP;
Atsushi Takeda, Akita, JP;
Takaki Shinkawa, Nikaho, JP;
TDK Corporation, Tokyo, JP;
Abstract
A dielectric ceramic composition comprised of at least dielectric particles having barium titanate as its main ingredient, wherein the ratio of dielectric particles having a surface diffusion structure comprised of a main ingredient phase comprised of the main ingredient and a diffusion phase present around the main ingredient phase with respect to said dielectric particles is 60% or more and the ratio of dielectric particles having a domain in the main ingredient phase with respect to the dielectric particles having the surface diffusion structure is 20% or less. According to the present invention, a dielectric ceramic composition and electronic device realizing good high temperature accelerated life can be provided.