Piezoelectric electro-mechanical bimorph transducer

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

H - Electricity

04

R

310/2, 349/67.4

H04R 17/00 (2006.01) G11B 5/592 (2006.01) H01L 41/09 (2006.01) H04R 17/08 (2006.01)

Patent

CA 1165860

ABSTRACT OF THE DISCLOSURE An electro-mechanical transudcer 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 µm 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.

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