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:
Apr. 19, 2005
Filed:
Feb. 28, 2003
Toshikatsu Kashiwaya, Inazawa, JP;
Kazuhiro Yamamoto, Nagoya, JP;
Masao Takahashi, Aichi-prefecture, JP;
Toshikatsu Kashiwaya, Inazawa, JP;
Kazuhiro Yamamoto, Nagoya, JP;
Masao Takahashi, Aichi-prefecture, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A piezoelectric/electrostrictive device is provided, including a ceramic substrate having at least one piezoelectric/electrostrictive layer made of a piezoelectric/electrostrictive ceramic composition and at least one pair of electrodes electrically connected to the piezoelectric/electrostrictive layer formed thereon. The piezoelectric/electrostrictive ceramic composition contains a PbMgNbO—PbZrO—PbTiOsystem composition as a major component, wherein part of Pb is substituted with at least one of Sr and La, and contains Ce in an amount of 0.01 to 0.50% by mass in terms of CeO. The piezoelectric/electrostrictive layer is solidly attached to the substrate directly or via part of the electrodes.