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:
Jul. 23, 2013
Filed:
Sep. 06, 2011
Kosuke Takano, Tokyo, JP;
Tomohisa Fukuoka, Tokyo, JP;
Makoto Maeda, Tokyo, JP;
Yuhta Matsunaga, Tokyo, JP;
Masahide Ishizuya, Tokyo, JP;
Tamotsu Ishiyama, Tokyo, JP;
Takahiro Yamada, Tokyo, JP;
Kosuke Takano, Tokyo, JP;
Tomohisa Fukuoka, Tokyo, JP;
Makoto Maeda, Tokyo, JP;
Yuhta Matsunaga, Tokyo, JP;
Masahide Ishizuya, Tokyo, JP;
Tamotsu Ishiyama, Tokyo, JP;
Takahiro Yamada, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A dielectric ceramic composition includes a compound having perovskite type crystal structure shown by a general formula ABO, where A is at least one selected from Ba, Ca and Sr, and B is at least one selected from Ti and Zr. The dielectric ceramic composition includes, as subcomponents, an oxide of RA (Dy, Gd and Tb); an oxide of RB (Ho and Y); an oxide of RC (Yb and Lu); Mg oxide and an oxide including Si in terms of RAO, RBO, RCO, Mg and Si, respectively. Also, when contents of the oxide of RA, RB and RC with respect to 100 moles of the compound are defined as 'α', 'β' and “γ”, respectively, they satisfy relations of 1.2≦(α/β)≦5.0 and 0.5≦(β/γ)≦10.0.