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. 19, 2013
Filed:
Jan. 03, 2011
Jiro Kato, Suwa, JP;
Toshiki Hara, Suwa, JP;
Hiroaki Tamura, Shimosuwa-machi, JP;
Satoshi Denda, Suwa, JP;
Koichi Morozumi, Shiojiri, JP;
Jiro Kato, Suwa, JP;
Toshiki Hara, Suwa, JP;
Hiroaki Tamura, Shimosuwa-machi, JP;
Satoshi Denda, Suwa, JP;
Koichi Morozumi, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A piezoelectric element comprising a first electrode, a piezoelectric layer which is composed of a metal oxide containing lead, zirconium and titanium and which formed above the first electrode, and a second electrode formed above the piezoelectric layer. The piezoelectric layer has negatively charged Pb—O complex defects and positively charged Pb—O complex defects, the concentration of the negatively charged Pb—O complex defects being higher than the concentration of the positively charged Pb—O complex defects.