Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1993-09-15
1995-08-29
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310360, H01L 4108
Patent
active
054463335
ABSTRACT:
An ultrasonic transducer unit for use in pulse-echo ultrasonic investigation has a plurality of components including a piezoelectric ultrasonic wave transmitting element, an acoustoelectric ultrasonic wave receiving element and electrodes therefor. To provide a compact and efficient transducer, these components are bonded together in an integrated multilayer structure in which the transmitting element and receiving element are superimposed in the direction of propagation of transmitted and received ultrasonic waves. The receiving element may be a ZnO single crystal. An insulating layer isolates two components from each other.
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J. S. Heyman "Phase Insensitive Acoustoelectric Transducer", J. Acoutst. Soc. Am 64(1), Jul. 1978 pp. 243-249.
Ishida Yoshihiko
Tani Makoto
Budd Mark O.
NGK Insulators Ltd.
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