Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1993-04-12
1995-04-25
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310335, 310358, 310369, H01L 4108
Patent
active
054102081
ABSTRACT:
A transducer has tapered piezoelectric layer sides in order to reduce the sidelobe levels. In addition, matching layers disposed on the piezoelectric layer may similarly be tapered to further increase performance. Alternative to tapering the piezoelectric layer, the top electrode and/or the matching layers may be reduced in size relative to the piezoelectric layer such that they generate a wave which destructively interferes with the undesirable lateral wave. There are also described methods for manufacturing a reduced sidelobe transducer.
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Ayter Sevig
Hossack John A.
Jackson Kathy J.
Liu Jing
Walters Worth B.
Acuson Corporation
Budd Mark O.
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