Piezoelectric ultrasonic transducer with acoustic matching plate

Details Piezoelectric ultrasonic transducer with acoustic matching plate Piezoelectric ultrasonic transducer with acoustic matching plate

1986-04-09

1987-07-14

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310366, 310327, 73644, H01L 4108

Patent

active

046804994

ABSTRACT:
A monolithic array ultrasonic transducer has a plurality of transducer elements formed thereon by isolating metallized areas on a piezoelectric plate without cutting the piezoelectric plate apart for each transducer element, and an acoustic matching layer having a longitudinal wave velocity within .+-.25% of a longitudinal wave velocity of the piezoelectric plate and a thickness equal to one half of that of the piezoelectric plate. The acoustic matching layer suppresses the radiation to an object of a partial wave in a direction of 60.degree. to a normal line to the plane of the piezoelectric plate.

REFERENCES:
patent: 4211949 (1980-07-01), Brisken et al.
patent: 4366406 (1982-12-01), Smith et al.
patent: 4424465 (1984-01-01), Ohigashi et al.
patent: 4473769 (1984-09-01), Nguyen
patent: 4523122 (1985-06-01), Tone et al.

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