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:
Sep. 09, 2014
Filed:
Sep. 23, 2010
Applicant:
Toshiki Hara, Suwa, JP;
Inventor:
Toshiki Hara, Suwa, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/045 (2006.01); C04B 35/499 (2006.01); B41J 2/14 (2006.01); H01L 41/43 (2013.01); H01L 41/09 (2006.01); H01L 41/187 (2006.01); H01L 41/314 (2013.01);
U.S. Cl.
CPC ...
B41J 2/14233 (2013.01); C04B 35/499 (2013.01); B41J 2202/03 (2013.01); H01L 41/43 (2013.01); H01L 41/0973 (2013.01); H01L 41/1876 (2013.01); H01L 41/314 (2013.01);
Abstract
A piezoelectric element includes a first conductive layer, a piezoelectric layer, and a second conductive layer. The piezoelectric layer is composed of a compound oxide containing at least lead, zirconium, titanium, and oxygen, and the compound oxide has a perovskite crystal structure. The piezoelectric layer has a thermally stimulated current having at least two peaks including a low temperature-side peak and a high temperature-side peak, and the magnitude of the low temperature-side peak is 1/30 or less of that of the high temperature-side peak.