Energy-trapping-by-frequency lowering-type piezoelectric resonan

Details Energy-trapping-by-frequency lowering-type piezoelectric resonan Energy-trapping-by-frequency lowering-type piezoelectric resonan

1988-06-27

1990-04-17

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310358, 310359, 310366, H01L 4108

Patent

active

049183508

ABSTRACT:
A piezoelectric resonance device of the energy-trapped type utilizing a harmonic wave of the thickness extensional vibration mode, wherein three or more electrodes are so disposed that they are overlapped with each other through the piezoelectric layer in the direction of the thickness and each of the electrodes is comprised of a vibrating electrode portion for energy-trapping and a conducting portion for connecting the vibrating electrode to the side edge of the piezoelectric layer.

REFERENCES:
patent: 3590287 (1971-06-01), Berlincourt et al.
patent: 3961210 (1976-06-01), Nagata et al.
patent: 4564782 (1986-01-01), Ogawa
patent: 4605876 (1986-08-01), Ogawa et al.
patent: 4652784 (1987-03-01), Inoue et al.

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