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:
Aug. 10, 2004
Filed:
Nov. 17, 2000
Applicant:
Inventor:
Toshimi Fukui, Kyoto, JP;
Assignee:
KRI, Inc., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 4/1187 ;
U.S. Cl.
CPC ...
H01L 4/1187 ;
Abstract
An element having certain superior piezoelectric characteristics at all times and of which process control in production of the element is relatively easy. In a piezoelectric element in which electrodes are arranged on both face sides of a piezoelectric film respectively, the piezoelectric film is provided with an oxide layer a containing 0 or not more than 15 weight percent of Pb arranged on a face of the piezoelectric film, the face being in contact with the electrode, and the oxide layer being formed of a composite oxide expressed by a chemical formula ABO or of a solid solution of one or not less than two kinds of composite oxides respectively expressed by the chemical formula ABO .