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:
Nov. 05, 2013
Filed:
Sep. 13, 2010
Koichi Morozumi, Shiojiri, JP;
Toshiki Hara, Suwa, JP;
Jiro Kato, Suwa, JP;
Satoshi Denda, Suwa, JP;
Koichi Morozumi, Shiojiri, JP;
Toshiki Hara, Suwa, JP;
Jiro Kato, Suwa, JP;
Satoshi Denda, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A piezoelectric element includes a first conductive layer, a second conductive layer disposed to face the first conductive layer, and a piezoelectric layer disposed between the first conductive layer and the second conductive layer and composed of a compound oxide containing at least lead, zirconium, titanium, and oxygen. The piezoelectric layer includes a lead concentration gradient region in which the lead concentration increases from the first conductive layer side to the second conductive layer side. The lead concentration gradient region is disposed on the first conductive layer side of the piezoelectric layer.