Stacked type piezoelectric element and vibration wave motor

Details Stacked type piezoelectric element and vibration wave motor Stacked type piezoelectric element and vibration wave motor

2006-06-27

2009-10-27

Budd, Mark (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323160

Reexamination Certificate

active

07608982

ABSTRACT:
Provided is a stacked type piezoelectric element including a surface electrode layer as a first layer and a piezoelectric layer as a second layer. A third layer to an N-th layer thereof are formed by alternately arranging piezoelectric layers and piezoelectric layers. A surface of the piezoelectric layer is provided with four-way split inner electrodes S+, B+, A−, and B−. A surface of the piezoelectric layer is provided with four-way split inner electrodes AG+, BG+, AG−, and BG−. A surface of the piezoelectric layer is provided with four-way split inner electrodes of A+, B+, A−, and B−. The piezoelectric layers are formed such that only the inner electrode S+ serving as a sensor phase and the inner electrodes A+ and AG+ being arranged in the same phase as the inner electrode S+ are exposed to an outside of the piezoelectric layer.

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