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. 28, 2004
Filed:
May. 28, 2002
Mutsumi Kitagawa, Nagoya, JP;
Nobuo Takahashi, Owariasahi, JP;
Yukihisa Takeuchi, Nishikamo-Gun, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A piezoelectric/electrostrictive film-type actuator has a ceramic base and a piezoelectric/electrostrictive element, which has piezoelectric/electrostrictive films and electrode films and which is disposed on the ceramic base, and is driven in accordance with a dislocation of the piezoelectric/electrostrictive element. The piezoelectric/electrostrictive element is formed such that the piezoelectric/electrostrictive films and the electrode films are alternately laminated so as to construct the uppermost layer and the lowermost layer with the electrode films. Also, the piezoelectric/electrostrictive films have two layers and no pores, containing a different phase formed by a decomposed material thereof, in the boundary sandwiched therebetween. In addition, the upper layer of the two-layered piezoelectric/electrostrictive films is thicker than the lower layer. This piezoelectric/electrostrictive film-type actuator solves the problem in that a withstand voltage of the piezoelectric/electrostrictive films is likely to decrease, and effectively achieves a bending dislocation.