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. 04, 2011
Filed:
May. 06, 2008
Hiroyuki Kobayashi, Kanagawa-ken, JP;
Yukio Sakashita, Kanagawa-ken, JP;
Hiroyuki Kobayashi, Kanagawa-ken, JP;
Yukio Sakashita, Kanagawa-ken, JP;
FujiFilm Corporation, Tokyo, JP;
Abstract
A piezoelectric device includes a piezoelectric film, and electrodes through which an electric field can be applied to the piezoelectric film along the thickness direction of the piezoelectric film. The piezoelectric film contains a ferroelectric phase in which the thickness direction and a normal of a plane determined by the spontaneous-polarization axis and the axis makes an angle θm satisfying the condition that −45 degrees<θm<+45 degrees and θm≠0 degrees. Further, the spontaneous-polarization axis or the axis may be perpendicular to the thickness direction of the piezoelectric film.