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. 29, 2005
Filed:
May. 23, 2003
Atsushi Tomozawa, Osaka, JP;
Eiji Fujii, Osaka, JP;
Hideo Torii, Osaka, JP;
Akiko Murata, Osaka, JP;
Ryoichi Takayama, Osaka, JP;
Taku Hirasawa, Kyoto, JP;
Atsushi Tomozawa, Osaka, JP;
Eiji Fujii, Osaka, JP;
Hideo Torii, Osaka, JP;
Akiko Murata, Osaka, JP;
Ryoichi Takayama, Osaka, JP;
Taku Hirasawa, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A piezoelectric element includes a first electrode layerprovided on a substrateand made of a noble metal to which at least one additive selected from the group consisting of Mg, Ca, Sr, Ba, Al and oxides thereof is added, an orientation control layerprovided on the first electrode layerand made of a cubic or tetragonal perovskite oxide that is preferentially oriented along a (100) or (001) plane, and a piezoelectric layerprovided on the orientation control layerand made of a rhombohedral or tetragonal perovskite oxide that is preferentially oriented along a (001) plane.