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. 17, 2011
Filed:
Dec. 13, 2007
Tsutomu Nanataki, Toyoake, JP;
Hirofumi Yamaguchi, Nagoya, JP;
Toshikatsu Kashiwaya, Inazawa, JP;
Takaaki Koizumi, Nagoya, JP;
Tsutomu Nanataki, Toyoake, JP;
Hirofumi Yamaguchi, Nagoya, JP;
Toshikatsu Kashiwaya, Inazawa, JP;
Takaaki Koizumi, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A piezoelectric/electrostrictive film type device including a thin substrate made of ceramic and a piezoelectric/electrostrictive operating portion disposed on the substrate and constituted by successively laminating a lower electrode film, a piezoelectric/electrostrictive film containing a large number of crystal particles constituted of a piezoelectric/electrostrictive composition, and an upper electrode film. The piezoelectric/electrostrictive composition contains one or more alkali metal elements selected from the group consisting of lithium, potassium, and sodium, and one or more metal elements selected from the group consisting of niobium, tantalum, antimony, and silver. Circle equivalent diameters of 90% or more of the large number of crystal particles are in a range of 0.3 to 50 μm.