TUNING BAR PIEZOELECTRIC VIBRATOR AND TUNING FORK PIEZOELECTRIC VIBRATOR
First Claim
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1. A tuning bar piezoelectric vibrator comprising:
- a first piezoelectric layer polarized in a thickness direction;
a second piezoelectric layer polarized in a direction opposite to the first piezoelectric layer in the thickness direction, the second piezoelectric layer being stacked on the first piezoelectric layer;
a first inner driver electrode and a second inner driver electrode located between the first and second piezoelectric layers, the first inner driver electrode and the second inner driver electrode being separated from each other in a plane direction of an interface between the first and second piezoelectric layers;
a first outer electrode located on an outer surface of the first piezoelectric layer so as to face the inner driver electrode over the first piezoelectric layer; and
a second outer electrode located on an outer surface of the second piezoelectric layer so as to face the inner driver electrode over the second piezoelectric layer.
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Abstract
A tuning bar piezoelectric vibrator includes first and second leg portions defined by a tuning bar piezoelectric vibrator, layers of first and second inner driver electrodes arranged as inner driver electrodes between first and second piezoelectric layers that are polarized in opposite directions of a thickness direction, a first outer electrode and a second outer electrode arranged to face the first and the second inner driver electrodes with the piezoelectric layers in between, respectively, and first and second vibrator portions in which the inner driver electrodes are used as driver electrodes.
16 Citations
20 Claims
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1. A tuning bar piezoelectric vibrator comprising:
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a first piezoelectric layer polarized in a thickness direction; a second piezoelectric layer polarized in a direction opposite to the first piezoelectric layer in the thickness direction, the second piezoelectric layer being stacked on the first piezoelectric layer; a first inner driver electrode and a second inner driver electrode located between the first and second piezoelectric layers, the first inner driver electrode and the second inner driver electrode being separated from each other in a plane direction of an interface between the first and second piezoelectric layers; a first outer electrode located on an outer surface of the first piezoelectric layer so as to face the inner driver electrode over the first piezoelectric layer; and a second outer electrode located on an outer surface of the second piezoelectric layer so as to face the inner driver electrode over the second piezoelectric layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification