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. 13, 2016
Filed:
Mar. 19, 2015
Tdk Corporation, Minato-ku, Tokyo, JP;
Nobuto Morigasaki, Tokyo, JP;
Takeru Yoshida, Tokyo, JP;
Tomohisa Fukuoka, Tokyo, JP;
Yuhta Matsunaga, Tokyo, JP;
Kazuhiro Komatsu, Akita, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
A dielectric ceramic composition includes at least dielectric particles having a core-shell structure and segregation particles, a concentration of a rare earth compound in the segregation particle is twice or more than an average concentration of the rare earth compound in a shell part of the dielectric particle having the core-shell structure, an area occupied by the segregation particles is 0.1 to 1.1%, when a maximum particle size of the segregation particle is defined as r, a minimum particle size of the segregation particle is defined as r, and an average particle size of the dielectric particle having the core-shell structure is defined as r, a relation of r/r≦2.00 and r/r≧0.25 is satisfied, and the segregation particles substantially do not include Mg.