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:
Mar. 19, 2013
Filed:
Mar. 10, 2010
Makoto Kubota, Yokohama, JP;
Kenji Takashima, Saitama, JP;
Masaki Azuma, Kyoto, JP;
Yoshitaka Nakamura, Kyoto, JP;
Yuichi Shimakawa, Kyoto, JP;
Takashi Iijima, Tsukuba, JP;
Bong-yeon Lee, Tsukuba, JP;
Makoto Kubota, Yokohama, JP;
Kenji Takashima, Saitama, JP;
Masaki Azuma, Kyoto, JP;
Yoshitaka Nakamura, Kyoto, JP;
Yuichi Shimakawa, Kyoto, JP;
Takashi Iijima, Tsukuba, JP;
Bong-Yeon Lee, Tsukuba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Kyoto University, Kyoto, JP;
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Abstract
Provided are a bismuth-based piezoelectric material whose insulation property is improved while its performance as a piezoelectric body is not impaired, and a piezoelectric device using the piezoelectric material. The piezoelectric material includes a perovskite-type metal oxide represented by the following general formula (1):Bi(FeCo)O  (1)where 0.95≦x≦1.25 and 0≦y≦0.30, and a root mean square roughness Rq (nm) of a surface of the piezoelectric material satisfies a relationship of 0<Rq≦25y+2 (0≦y≦0.30).