Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2005-12-16
2008-08-26
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
Reexamination Certificate
active
07417361
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 body30is constituted of a large number of crystal grains31having the piezoelectric/electrostrictive properties in the form of a film or a layer having one or more layers. A number ratio of crystal grains32, a part of which is exposed to at least one of interfaces35a,35bbetween the bodies and the outside in a thickness direction, is 80% or more of a large number of crystal grains31observed in an arbitrary section in the thickness direction.
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Kashiwaya Toshikatsu
Kitagawa Mutsumi
Nanataki Tsutomu
Burr & Brown
NGK Insulators Ltd.
Rosenau Derek J
Schuberg Darren
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