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. 23, 2010
Filed:
Jan. 29, 2008
Shintarou Hara, Fukuoka, JP;
Osamu Watanabe, Kumamoto, JP;
Kazumi Sadamatsu, Kumamoto, JP;
Hideaki Horio, Fukuoka, JP;
Eiji Fujii, Osaka, JP;
Shintarou Hara, Fukuoka, JP;
Osamu Watanabe, Kumamoto, JP;
Kazumi Sadamatsu, Kumamoto, JP;
Hideaki Horio, Fukuoka, JP;
Eiji Fujii, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A piezoelectric element includes a pressure chamber member that has an opening communicating with a nozzle, a vibrating plate that is disposed on the pressure chamber member so as to cover the opening, a lower electrode that is disposed on the vibrating plate, a piezoelectric body that is disposed on the lower electrode, an upper electrode that is disposed on the piezoelectric body and in a region opposed to the opening, and a lead electrode that is disposed on the piezoelectric body, that extends from the upper electrode, and that has a width smaller than that of the upper electrode. The piezoelectric body includes a groove portion that is disposed in a predetermined region along an edge portion of the opening and an inactive region (piezoelectric inactive region) that is a region other than the groove portion, that is disposed along the edge portion of the opening, and that does not substantially serve as a piezoelectric element. The lead electrode is disposed in the piezoelectric inactive region.