Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2005-12-16
2008-08-19
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
Reexamination Certificate
active
07414352
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 body is constituted of a large number of crystal grains having the piezoelectric/electrostrictive properties in the form of a film or a layer having one or more layers. A number ratio of crystal grains whose grain diameters W in a width direction are longer than grain diameters T in a thickness direction is 70% or more of a large number of crystal grains observed 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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