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:
Oct. 10, 2017
Filed:
Oct. 23, 2014
Applicant:
Taiyo Yuden Co., Ltd., Taito-ku, Tokyo, JP;
Inventors:
Gouki Watanabe, Takasaki, JP;
Takayuki Goto, Takasaki, JP;
Keiichi Hatano, Takasaki, JP;
Sumiaki Kishimoto, Takasaki, JP;
Yutaka Doshida, Takasaki, JP;
Assignee:
TAIYO YUDEN CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 41/187 (2006.01); H01L 41/43 (2013.01); C04B 35/493 (2006.01); C04B 35/64 (2006.01); H04R 17/00 (2006.01); H04R 31/00 (2006.01); C04B 35/626 (2006.01);
U.S. Cl.
CPC ...
H01L 41/1876 (2013.01); C04B 35/493 (2013.01); C04B 35/6261 (2013.01); C04B 35/62645 (2013.01); C04B 35/64 (2013.01); H01L 41/43 (2013.01); H04R 17/00 (2013.01); H04R 31/00 (2013.01); C04B 2235/3244 (2013.01); C04B 2235/3251 (2013.01); C04B 2235/3255 (2013.01); C04B 2235/3279 (2013.01); C04B 2235/3284 (2013.01); C04B 2235/768 (2013.01); C04B 2235/786 (2013.01); C04B 2235/80 (2013.01); Y10T 428/239 (2015.01);
Abstract
A piezoelectric ceramic has a primary phase constituted by ceramic grains of perovskite crystal structure containing Pb, Nb, Zn, Ti, and Zr, and a secondary phase constituted by ZnO grains present sporadically in the primary phase. The piezoelectric ceramic of high kr and high specific dielectric constant can be sintered at low temperature and exhibit minimal characteristics variations.