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:
Jan. 21, 2014
Filed:
Mar. 10, 2011
Masato Shimada, Chino, JP;
Masato Shimada, Chino, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A piezoelectric element includes a first electrode which is an individual electrode, a piezoelectric layer, and a second electrode which is a common electrode. The piezoelectric element is provided with a piezoelectric active section and a piezoelectric nonactive section so as to face the pressure generating chambers. The piezoelectric nonactive section extends to the outside of the pressure generating chambers. On the piezoelectric layer of the piezoelectric nonactive section, a stress controlling layer is provided which has the same direction of internal stress as internal stress of the second electrode and is electrically insulated from the second electrode.