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:
Sep. 29, 2009
Filed:
Nov. 30, 2006
Akio Iwase, Nishio, JP;
Shige Kadotani, Aichi-pref, JP;
Tetsuji Itou, Kariya, JP;
Denso Corporation, Kariya, Aichi-Pref., JP;
Abstract
A method of producing a laminate-type piezoelectric element, wherein a ceramic laminated body therein is formed through an intermediate laminated body-forming step of forming an intermediate laminated bodyby alternately laminating green sheetsthat serve as the piezoelectric layers and the inner electrode layers, and a calcining step of forming the ceramic laminated body by calcining the intermediate laminated body. In the intermediate laminated body-forming step, an overlapped portionand a non-overlapped portionare formed in the intermediate laminated body, and voidsare formed, in advance, in at least part of the portion that becomes the non-overlapped portion. In the calcining step, relaxing layers including the voidsare formed.