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. 20, 2009
Filed:
Feb. 24, 2006
Eiji Fujii, Osaka, JP;
Hideo Torii, Osaka, JP;
Ryoichi Takayama, Osaka, JP;
Atsushi Tomozawa, Osaka, JP;
Akiko Murata, Osaka, JP;
Taku Hirasawa, Kyoto, JP;
Eiji Fujii, Osaka, JP;
Hideo Torii, Osaka, JP;
Ryoichi Takayama, Osaka, JP;
Atsushi Tomozawa, Osaka, JP;
Akiko Murata, Osaka, JP;
Taku Hirasawa, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In a piezoelectric element, an adhesive layeris provided on a substrate, a first electrode layermade of a noble metal containing titanium or titanium oxide is provided on the adhesive layer, and an orientation control layerthat is preferentially oriented along a (100) or (001) plane is provided on the first electrode layer. In the vicinity of a surface of the orientation control layerthat is closer to the first electrode layer, a (100)- or (001)-oriented region extends over titanium or titanium oxide located on one surface of the first electrode layerthat is closer to the orientation control layer, and the cross-sectional area of the region in the direction perpendicular to the thickness direction gradually increases in the direction away from the first electrode layertoward the opposite side. Further, a piezoelectric layerthat is preferentially oriented along a (001) plane is provided on the orientation control layer