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. 24, 2013
Filed:
Feb. 29, 2012
Yutaka Maruyama, Tokyo, JP;
Akira Shimada, Kawasaki, JP;
Yutaka Inada, Sendai, JP;
Masashi Matsumoto, Kumagaya, JP;
Yuu Itou, Sendai, JP;
Yutaka Maruyama, Tokyo, JP;
Akira Shimada, Kawasaki, JP;
Yutaka Inada, Sendai, JP;
Masashi Matsumoto, Kumagaya, JP;
Yuu Itou, Sendai, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Taiheiyo Cement Corporation, Tokyo, JP;
Nihon Ceratec Co., Ltd., Sendai-shi, JP;
Abstract
Provided is a piezoelectric element including: an electrode portion including a piezoelectric layer and an electrode layer that are laminated; and a non-electrode portion that is in contact with the electrode portion and includes a piezoelectric layer without an electrode layer, in which the non-electrode portion includes a region having a density smaller than a density of the piezoelectric layer of the electrode portion.