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. 26, 2008
Filed:
Dec. 16, 2005
Tsutomu Nanataki, Toyoake, JP;
Mutsumi Kitagawa, Inuyama, JP;
Toshikatsu Kashiwaya, Inazawa, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
There is disclosed a piezoelectric/electrostrictive body which has superior piezoelectric/electrostrictive properties and which exhibits a sufficient durability even in a case where a flexural displacement is repeated a large number of times. A piezoelectric/electrostrictive bodyis constituted of a large number of crystal grainshaving the piezoelectric/electrostrictive properties in the form of a film or a layer having one or more layers. A number ratio of crystal grains, a part of which is exposed to at least one of interfacesbetween the bodies and the outside in a thickness direction, is 80% or more of a large number of crystal grainsobserved in an arbitrary section in the thickness direction.