Ultrasonic contact transducer and array
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United States of America Patent
Stats
-
Nov 24, 1992
Issued Date -
N/A
app pub date -
Sep 17, 1990
filing date -
Sep 26, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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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