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:
Jul. 14, 2015
Filed:
Jun. 27, 2014
Panasonic Corporation, Osaka, JP;
Kazuya Hashimoto, Osaka, JP;
Yoshiaki Tanaka, Nara, JP;
Takakiyo Harigai, Osaka, JP;
Hideaki Adachi, Osaka, JP;
Eiji Fujii, Osaka, JP;
Abstract
The present invention provides a piezoelectric film having a higher polarization-disappearance temperature Td and the usage thereof. The piezoelectric film of the present invention comprising an interface layer of (Na, Bi)TiO-BaTiOlayer having a (001) orientation only and a piezoelectric layer of a (Na, Bi)TiO-BaTiOlayer having a (001) orientation only, where x1 is 0.28-0.43, y1 is 0.49-0.60, x2 is 0.30-0.46, and y2 is 0.51-0.63. The piezoelectric layer is formed on the interface layer. The interface layer contains nickel. The interface layer has a Ni/Ti molar ratio of not less than 0.02.