Ultrasonic probe

Details Ultrasonic probe Ultrasonic probe

1977-06-17

1978-07-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

340 8MM, 340 9, 128 2V, H01L 4110

Patent

active

041017951

ABSTRACT:
An ultrasonic probe particularly suitable for ultrasonic diagnostic equipments of the electronic scanning type is made up of a multiplicity of piezoelectric transducer elements, each in the shape of a rectangular plate with electrode films coated on both sides, arranged in a row at intervals and an acoustic impedance matching layer placed on the row of the transducer elements. The width-to-thickness ratio of each piezoelectric plate takes a value not greater than 0.8 and preferably between 0.4 and 0.7 so that the plate can vibrate in width expansion mode. It is highly preferable that the impedance matching layer has a laminated structure given by two layers which are different in acoustic impedance of the respective materials and individually have definite thicknesses.

REFERENCES:
patent: 2408028 (1946-09-01), Batchelder
patent: 3166731 (1965-01-01), Joy
patent: 3971962 (1976-07-01), Green

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