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:
Oct. 11, 2011
Filed:
Sep. 29, 2010
Takanori Matsuda, Chofu, JP;
Toshihiro Ifuku, Yokohama, JP;
Kenichi Takeda, Yokohama, JP;
Katsumi Aoki, Yokohama, JP;
Takanori Matsuda, Chofu, JP;
Toshihiro Ifuku, Yokohama, JP;
Kenichi Takeda, Yokohama, JP;
Katsumi Aoki, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A piezoelectric element includes a piezoelectric film disposed on a substrate and a pair of electrodes disposed in contact with the piezoelectric film and utilizing a bending mode. The piezoelectric film includes domains constituted of a tetragonal crystal and including an a-domain which is formed by a crystal having a (100) plane parallel to the film surface of the piezoelectric film, the a-domains include an A-domain having a normal axis of (001) plane substantially parallel to a principal bending direction of the piezoelectric film and a B-domain having a normal axis of (001) plane substantially perpendicular to the principal bending direction of the piezoelectric film, and the A-domains have a volume proportion larger than 50 vol % with respect to the sum of the volume of the A-domains and the volume of the B-domains.