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. 25, 2012
Filed:
May. 29, 2008
Masahiro Inagaki, Kirishima, JP;
Takeshi Okamura, Kirishima, JP;
Tomohiro Kawamoto, Kirishima, JP;
KYOCERA Corporation, Kyoto, JP;
Abstract
Provided is a highly durable laminated piezoelectric element wherein a stress generated at a portion, i.e., the boundary between an active region and inactive region, is reduced. A method for manufacturing such laminated piezoelectric element is also provided. The laminated piezoelectric element has a laminated structure () wherein a plurality of piezoelectric layers () and internal electrode layers () are alternately laminated. The piezoelectric layer () contains a metal element other than those elements constituting piezoelectric ceramic, i.e., the main component of the piezoelectric layer (), and at a portion () of the piezoelectric layer () at the vicinity of an end of the internal electrode layer (), metal particles having a metal element as a main component exist. The content of the metal at the portion () at the vicinity of the end is higher than the content of a compound of the metal element and a nonmetal element.