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:
Mar. 25, 2008
Filed:
Jan. 26, 2005
Hideo Torii, Osaka, JP;
Eiji Fujii, Osaka, JP;
Takeshi Kamada, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A lead content in a piezoelectric thin film () of a piezoelectric element () is made smaller as compared to stoichiometric composition. More specifically, the piezoelectric thin film () is made of lead zirconate titanate expressed as Pb(ZrTi)O(0<s<1) or lead-zirconate-titanate-based oxide expressed as (PbA)(ZrTiB)O(0<s<1, 0<t<1-s) where A is a substitutive metal ion in an A-site in the perovskite crystalline structure and B is a substitutive metal ion in a B-site in the perovskite crystalline structure. The value of x, which indicates a deficiency in Pb content in each composition, is more than 0 but not more than 0.15.