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. 03, 2017
Filed:
Nov. 07, 2014
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 41/18 (2006.01); H01L 41/187 (2006.01); C04B 35/475 (2006.01); H01L 41/08 (2006.01); H01L 41/083 (2006.01); H01L 41/273 (2013.01); H01L 41/316 (2013.01);
U.S. Cl.
CPC ...
H01L 41/1878 (2013.01); H01L 41/083 (2013.01); H01L 41/0805 (2013.01); H01L 41/273 (2013.01); H01L 41/316 (2013.01);
Abstract
The present invention aims to provide an excellent piezoelectric composition and an excellent piezoelectric element if the piezoelectric properties especially a high spontaneous polarization and a sufficiently high resistivity, the low pollution, the environment and the ecology are considered. In the piezoelectric composition, the main component contains the substance represented by the following formula with a perovskite-typed structure, (BiNa)(TiMgAl)O. Wherein, 0.01≦x≦0.8, 0.2≦y≦0.8, 0.01≦z≦0.6, 0.75≦m≦1.0, and x+y+z=1.