Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-03-07
2006-03-07
Dougherty, Thomas M. (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S324000, C310S328000
Reexamination Certificate
active
07009328
ABSTRACT:
There is disclosed a piezoelectric/electrostrictive device made of piezoelectric/electrostrictive film which includes: a substrate section; and an operation section disposed on the substrate section and constituted of a piezoelectric/electrostrictive film and an electrode film and which operates by displacement of the operation section. The operation section comprises the piezoelectric/electrostrictive films and electrode films alternately laminated so that uppermost and lowermost layers form the electrode films, the operation and substrate sections are integrally fired, and the substrate section is constituted of a ceramic which contains a titanium element. For the piezoelectric/electrostrictive device made of piezoelectric/electrostrictive film, a residual stress after firing hardly exists, therefore larger displacement is obtained with the same driving voltage, response speed is higher, and generation force is larger.
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Kimura Koji
Kitagawa Mutsumi
Burr & Brown
Dougherty Thomas M.
NGK Insulators Ltd.
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