Piezoelectric electro-mechanical bimorph transducer

Details Piezoelectric electro-mechanical bimorph transducer Piezoelectric electro-mechanical bimorph transducer

1980-12-08

1982-12-14

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310346, 310363, H01L 4108

Patent

active

043639933

ABSTRACT:
An electro-mechanical transducer having a first layer made of piezoelectric material having opposing major surfaces, a pair of electrodes formed on the major surfaces of the first layer, respectively, and a second layer clamped at its one surface to one of the surfaces of the first layer. In this case, the first layer has a Young's modulus of E, the second layer has a Young's modulus Ex in one direction and a Young's modulus Ey in the direction perpendicular to the one direction in the major surface, the Young's moduli E, Ex, Ey satisfy the relation E>Ey, Ex>Ey, and one end of the first and second layers along the one direction is clamped. The thickness of the electrode is selected between 0.1 and 3 .mu.m to obtain large amount of displacement at the other end. The outer surface of the electrode may be coated with a conductive paste to ensure voltage supply to the whole surface of the electrode.

REFERENCES:
patent: 3084228 (1963-04-01), Shiga
patent: 3573511 (1971-04-01), Noren
patent: 3622815 (1971-11-01), Schafft
patent: 3629625 (1971-12-01), Schafft
patent: 3676722 (1972-07-01), Schafft

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