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. 08, 2016
Filed:
Jul. 23, 2013
Applicant:
Taiyo Yuden Co., Ltd., Taito-ku, Tokyo, JP;
Inventors:
Katsuya Taniguchi, Takasaki, JP;
Tetsuo Shimura, Takasaki, JP;
Assignee:
TAIYO YUDEN CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01G 4/12 (2006.01); C04B 35/468 (2006.01); H01G 4/30 (2006.01);
U.S. Cl.
CPC ...
H01G 4/1218 (2013.01); C04B 35/4682 (2013.01); H01G 4/1227 (2013.01); H01G 4/30 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3236 (2013.01); C04B 2235/3239 (2013.01); C04B 2235/3241 (2013.01); C04B 2235/3262 (2013.01); C04B 2235/3272 (2013.01); C04B 2235/3275 (2013.01); C04B 2235/3279 (2013.01); C04B 2235/3281 (2013.01); C04B 2235/3284 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/652 (2013.01); C04B 2235/6584 (2013.01); C04B 2235/663 (2013.01); C04B 2235/785 (2013.01);
Abstract
A dielectric ceramic is formed with sintered grains constituting the dielectric have an average grain size of 0.2 to 1.0 μm and an oxygen defect concentration of 0.2 to 0.5%. An acceptor element is added to the dielectric ceramic by no more than 0.5 mol per 100 mol of the primary component of BaTiO. The oxygen defect concentration is temporarily increased by reduction and sintering, after which the oxygen defect concentration is reduced through the subsequent re-oxidization process. Crystal strain generated in the re-oxidization process increases the dielectric constant.