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:
Nov. 25, 2008
Filed:
Apr. 30, 2007
Makoto Kubota, Tokyo, JP;
Motokazu Kobayashi, Yokohama, JP;
Keiko Abe, Kawasaki, JP;
Fumio Uchida, Daito, JP;
Kenji Maeda, Nakatsugawa, JP;
Chiemi Shimizu, Hirakata, JP;
Makoto Kubota, Tokyo, JP;
Motokazu Kobayashi, Yokohama, JP;
Keiko Abe, Kawasaki, JP;
Fumio Uchida, Daito, JP;
Kenji Maeda, Nakatsugawa, JP;
Chiemi Shimizu, Hirakata, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Fuji Chemical Co, Ltd., Osaka, JP;
Abstract
A piezoelectric element having a piezoelectric film and one pair of electrodes being in contact with the piezoelectric film on a substrate, wherein the piezoelectric film has a structure in which a lead-containing piezoelectric film and a lead-free piezoelectric film are laminated, and in the piezoelectric film, a layer furthest from the substrate and a layer closest to the substrate are lead-free piezoelectric films.