Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1994-09-21
1996-02-27
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310320, H01L 4108
Patent
active
054951356
ABSTRACT:
A piezoelectric resonator (10) with an attenuated spurious response. The resonator (10) includes a piezoelectric crystal plate (12) having opposite surfaces (14, 16), an electrode (18, 24) positioned and overlying relationship on each of the opposite surfaces (14, 16), the electrodes (18, 24) being substantially coextensive and opposite, and providing a primary frequency mode of operation and spurious modes upon suitable energization, and a number of mass loading structures (34) on at least one of the surfaces (14, 16) substantially surrounding at least one of the electrodes (18, 24).
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Alhayek Iyad
Haas Kevin
Zimnicki Charles
Budd Mark O.
Cunningham Gary J.
Motorola Inc.
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