Piezoelectric transducer and process for preparation thereof

Details Piezoelectric transducer and process for preparation thereof Piezoelectric transducer and process for preparation thereof

1986-06-02

1988-07-12

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041809, 2041811, 2041921, 310320, 310321, 310322, 310325, 310334, 427124, 427125, C25D 1300, C25D 1302, C25D 1304, H01L 4104

Patent

active

047568089

ABSTRACT:
A piezoelelectric transducer usable preferably as a high-frequency ultrasonic probe for diagnostic inspection and the process for preparation thereof are disclosed.
The piezoelectric transducer comprises a piezoelectric material layer, a pair of electrode layers formed respectively on the opposite surfaces of said piezoelectric material layer and for applying electric load across the piezoelectric material layer to thereby generate acoustic oscillation or for measuring electric energy generated due to the acoustic oscillation of the piezoelectric material layer, and an acoustic matching section containing at least one quarter-wave matching layer and formed on one of the electrode layers. The acoustic matching section includes an elelctric conductive layer therein.
The acoustic matching section is formed by electro deposition, preferably by the electro painting method or electrophoretic method.
The ultrasonic probe can be prepared of a frequency band higher than 7.5 MHz, even higher than 10 MHz and provides a clear image of a shallow portion from the surface of an object to be inspected such as a human body.

REFERENCES:
patent: 3864161 (1975-02-01), Thompson
patent: 4211948 (1980-07-01), Smith et al.
patent: 4419467 (1983-12-01), Wismer et al.
patent: 4523122 (1985-06-01), Tone et al.
patent: 4616152 (1986-10-01), Saito et al.

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