Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2005-05-03
2005-05-03
Dougherty, Thomas M. (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
Reexamination Certificate
active
06888292
ABSTRACT:
A multi-layered piezoelectric device includes a plurality of piezoelectric portions and a plurality of electrodes electrically connected to the piezoelectric portions, that are formed in layers on a ceramic substrate. A first piezoelectric portion is made of a piezoelectric ceramic composition containing Ni in an amount of 0.08 to 0.31% by mass (in terms of NiO), and second and upper piezoelectric portions are made of a piezoelectric ceramic composition of higher Ni content than in the first piezoelectric portion. An electrode is provided at least between the first piezoelectric portion and the second piezoelectric portion.
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Kashiwaya Toshikatsu
Kitagawa Mutsumi
Burr & Brown
Dougherty Thomas M.
NGK Insulators Ltd.
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