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. 30, 2014
Filed:
Sep. 07, 2011
Hideki Hahiro, Shiojiri, JP;
Hideki Hahiro, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A piezoelectric element includes a first electrode, a first multilayer composite disposed on the first electrode, a second multilayer composite disposed on the first electrode with a distance from the first multilayer composite, and a covering layer covering the side surfaces of the first and second multilayer composites and the surface of the first electrode between the first multilayer composite and the second multilayer composite. The first and second multilayer composites each include a piezoelectric layer and a second electrode over the piezoelectric layer. The first electrode contains a metal that can react with chlorine, and has at least one of a bump and a dip at the surface thereof between the first multilayer composite and the second multilayer composite.