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:
Jun. 12, 2012
Filed:
Mar. 27, 2007
Takami Sakamoto, Kirishima, JP;
Masahiro Inagaki, Kirishima, JP;
Harald-johannes Kastl, Fichtelberg, DE;
Carsten Schuh, Baldham, DE;
Bernhard Doellgast, Deutschlandsberg, AT;
Atsushi Ochi, Yokohama, JP;
Takami Sakamoto, Kirishima, JP;
Masahiro Inagaki, Kirishima, JP;
Harald-Johannes Kastl, Fichtelberg, DE;
Carsten Schuh, Baldham, DE;
Bernhard Doellgast, Deutschlandsberg, AT;
Atsushi Ochi, Yokohama, JP;
Kyocera Corporation, Kyoto, JP;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A multi-layer piezoelectric element having higher durability which experience less decrease in the amount of displacement even when operated continuously over a long period of time under a high pressure and a high voltage is provided. The multi-layer piezoelectric element comprises a plurality of piezoelectric layers and a plurality of internal electrode layers, wherein the piezoelectric layers and the internal electrode layers are stacked alternately one on another, and at least one of the plurality of internal electrode layers contains at least one nitride, titanium nitride or zirconium nitride.