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:
May. 23, 2006
Filed:
Feb. 19, 2003
Isaku Kanno, Nara, JP;
Toshiyuki Matsunaga, Osaka, JP;
Takeshi Kamada, Nara, JP;
Shintaro Hara, Fukuoka, JP;
Isaku Kanno, Nara, JP;
Toshiyuki Matsunaga, Osaka, JP;
Takeshi Kamada, Nara, JP;
Shintaro Hara, Fukuoka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a piezoelectric element comprising a first electrodeprovided on a substrate, a piezoelectric materialprovided on the first electrodeand a second electrodeprovided on the piezoelectric material, the piezoelectric materialis configured so as to have a perovskite type crystal structure which is represented by a formula ABOand in which the main component for the A site is Pb and the main components for the B site are Zr, Ti and Pb, and configured so that a ratio of Pb atoms to all atoms in the B site is more than 3% and not more than 30%. Namely, the piezoelectric materialis formed so as to contain Pb excessively and the excess Pb atoms are activated to be Pbduring formation of the piezoelectric materialand then introduced into the B site.