Piezoelectric vibrator

Details Piezoelectric vibrator Piezoelectric vibrator

1986-06-09

1987-12-29

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310312, 310365, 310369, H01L 4108

Patent

active

047163321

ABSTRACT:
A piezoelectric vibrator of thickness-shear mode including a vibrating plate made of AT-cut quartz and a pair of electrodes applied on major surfaces of the vibrating plate in opposition to each other. A part of a contour of the vibrating plate is made closer to the electrode by cutting off a corner of a square vibrating plate. An impedance of the piezoelectric vibrator for a fundamental vibration is extremely increased to suppress the fundamental vibration and thus the piezoelectric vibrator can vibrate stably at a third overtone frequency.

REFERENCES:
patent: 1967839 (1934-07-01), Osnos
patent: 2343059 (1944-02-01), Hight
patent: 3020424 (1962-02-01), Bechmann
patent: 3074034 (1963-01-01), Crownover
patent: 3076903 (1963-02-01), Schwartz
patent: 3382381 (1968-05-01), Horton
patent: 4114062 (1978-09-01), Mattuschka
patent: 4123680 (1978-10-01), Kemper et al.
patent: 4188557 (1980-02-01), Mattuschka
patent: 4357554 (1982-11-01), Peters
patent: 4454443 (1984-06-01), Lukaszek et al.
patent: 4511820 (1985-04-01), MacKenzie

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