Ultrasonic contact transducer and array

Details Ultrasonic contact transducer and array Ultrasonic contact transducer and array

1990-09-17

1992-11-24

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310330, 310335, 310800, H01L 4108

Patent

active

051665735

ABSTRACT:
A flexible ultrasonic contact transducer comprises an unpoled polymeric film layer and a poled piezo film layer. Electrode shielding layers are disposed on outer surfaces of the unpoled polymeric film layer and poled piezo film layer. A quarter wave reflector is disposed between inner surfaces of the two layers. An ultrasonic contact transducer array comprises a common poled piezo film layer and a common backing/insulating layer. A plurality of quarter wave reflector elements are disposed between inner surfaces of the poled piezo film layer and backing/insulating layer. Shielding electrodes are disposed on the outer surfaces of the two layers. A polymeric shielding layer is preferably disposed around the quarter wave reflectors. Lead means provide an electrical path from the quarter wave reflectors to a common edge of the array.

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patent: 4748366 (1988-05-01), Taylor
patent: 4833659 (1989-05-01), Geil et al.

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