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:
Feb. 27, 2018
Filed:
Aug. 21, 2015
Applicant:
Tdk Corporation, Tokyo, JP;
Inventor:
Hiroki Katoh, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 41/18 (2006.01); H01L 41/187 (2006.01); H01L 41/083 (2006.01);
U.S. Cl.
CPC ...
H01L 41/18 (2013.01); H01L 41/187 (2013.01); H01L 41/083 (2013.01);
Abstract
The present invention aims to provide a piezoelectric composition which is free of lead based compounds and is represented by the following formula (1), (BiNaBaCa)(TiHf)O(1), wherein, x, y, z and a in formula (1) meets the following conditions, 0.70x0.90, 0.02y0.28, 0.02z0.28, 0.90a1.10 and x+y+z=1. The present invention also provides a piezoelectric device having the piezoelectric composition mentioned above.