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:
Dec. 28, 2010
Filed:
Jan. 18, 2006
Tetsuro Fukui, Yokohama, JP;
Kenichi Takeda, Yokohama, JP;
Toshihiro Ifuku, Yokohama, JP;
Hiroshi Funakubo, Yokohama, JP;
Shintaro Yokoyama, Yokohama, JP;
Yong Kwan Kim, Yokohama, JP;
Hiroshi Nakaki, Yokohama, JP;
Risako Ueno, Yokohama, JP;
Shoji Okamoto, Yokohama, JP;
Tetsuro Fukui, Yokohama, JP;
Kenichi Takeda, Yokohama, JP;
Toshihiro Ifuku, Yokohama, JP;
Hiroshi Funakubo, Yokohama, JP;
Shintaro Yokoyama, Yokohama, JP;
Yong Kwan Kim, Yokohama, JP;
Hiroshi Nakaki, Yokohama, JP;
Risako Ueno, Yokohama, JP;
Shoji Okamoto, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Tokyo Institute of Technology, Tokyo, JP;
Abstract
A piezoelectric substance element has a piezoelectric substance film and a pair of electrodes connected to the piezoelectric substance film on a substrate, and a main component of the piezoelectric substance film is Pb(Zr, Ti)O, a composition ratio of Zr/(Zr+Ti) is over 0.4 but less than 0.7, the piezoelectric substance film is a film having at last a tetragonal crystal a-domain and a c-domain within a range of ±10° with respect to the surface of the substrate, and a volume rate of the c-domain to the total of the a-domain and the c-domain is equal to or larger than 20% and equal to or smaller than 60%.