Ultrasonic contact transducer and array

Details Ultrasonic contact transducer and array Ultrasonic contact transducer and array

H - Electricity

04

R

356/200, 349/67.

H04R 17/00 (2006.01) B06B 1/06 (2006.01) H01L 41/04 (2006.01)

Patent

CA 2026053

Abstract of the Invention 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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