Invention Grant
US08237330B2 Vibrating element, fabrication method thereof, and ultrasonic motor having the same 有权
振动元件及其制造方法以及具有该振动元件的超声波马达

Vibrating element, fabrication method thereof, and ultrasonic motor having the same
Abstract:
A vibrating element of an ultrasonic motor includes a vibrating member, and a piezoelectric body to produce a traveling wave thus to vibrate the vibrating member when electric power is applied to the piezoelectric body. The piezoelectric body includes a first piezoelectric layer attached to the vibrating member and in which positive poles and negative poles are alternately polarized, a second piezoelectric layer attached to the first piezoelectric layer and in which positive poles and negative poles are alternately polarized, a plurality of electrodes formed on opposite surfaces of the first and second piezoelectric layers, and an electrode connecting part formed on outer circumferential surfaces of the first and second piezoelectric layers to selectively connect the plurality of electrodes to one other.
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