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:
Aug. 16, 2011
Filed:
Sep. 25, 2008
Katsumi Aoki, Yokohama, JP;
Kenichi Takeda, Yokohama, JP;
Toshihiro Ifuku, Yokohama, JP;
Takanori Matsuda, Chofu, JP;
Tetsuro Fukui, Yokohama, JP;
Katsumi Aoki, Yokohama, JP;
Kenichi Takeda, Yokohama, JP;
Toshihiro Ifuku, Yokohama, JP;
Takanori Matsuda, Chofu, JP;
Tetsuro Fukui, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The piezoelectric actuator includes a piezoelectric film between two electrode layers and a diaphragm. Assuming that: each elastic coefficient of all materials is isotropic and a distortion amount of the piezoelectric film by an electric field is isotropic in all in-plane directions; a point located on a diaphragm surface and having a maximum displacement when a predetermined electric field is applied to distort the piezoelectric film, is expressed by Pδ; and a point located on a circumference of a reference-circle having Pδas a center and having a minimum difference in displacement from Pδis expressed by Pδ, the diaphragm has a shape capable of determining an axis Aset in a straight-line joining Pδand Pδ, the diaphragm comprises a single-crystalline-material in which a plane orthogonal to Aand perpendicular to an axis Aon the diaphragm surface, is a {110}-plane, and the piezoelectric film is a {100}-single-orientation film.