Tuning fork type quartz resonator

Details Tuning fork type quartz resonator Tuning fork type quartz resonator

1979-06-19

1982-09-14

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310346, 310315, H01L 4108

Patent

active

043497632

ABSTRACT:
A quartz crystal tuning fork resonator has a pair of vibratable arms vibratable in the flexural mode in response to excitation of driving electrodes positioned at both major surfaces and both side surfaces of each vibratable arm. The vibratable arms have a width w as measured in the widthwise direction of the major surfaces, a thickness t, and are spaced apart a distance s and the vibratable arms are dimensioned so as to satisfy the relationships s/t.gtoreq.1 and s/w.gtoreq.0.4. The resonator preferably has an overall length L.ltoreq.5 mm, an overall width W.ltoreq.1 mm and a thickness t>50 and is formed by etching. The driving electrodes are configured to establish an electric field component directed parallel to the major surfaces to thereby drive the vibrating arms in the flexural mode.

REFERENCES:
patent: 3128397 (1964-04-01), Shinada et al.
patent: 3683213 (1972-08-01), Staudte
patent: 3697789 (1972-10-01), Kato et al.
patent: 4099078 (1978-07-01), Shibata et al.
patent: 4173726 (1979-11-01), Hanji
patent: 4178527 (1979-12-01), Kawashima
patent: 4178566 (1979-12-01), Kawashima

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