Contact heater for piezoelectric effect resonator crystal

Details Contact heater for piezoelectric effect resonator crystal Contact heater for piezoelectric effect resonator crystal

1985-11-25

1988-05-31

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310346, 310353, 310365, 310369, H01L 4108

Patent

active

047483679

ABSTRACT:
A contact heater arrangement is disclosed for a piezoelectric effect crystal resonator. The piezoelectric effect crystal element may be an SC cut quartz crystal disc having electrodes affixed to one side thereof to generate a lateral field in the crystal disc. The contact heater element is applied to the side of the crystal element opposite the side on which the electrodes are affixed. The particular pattern of the heater leaves the center of the crystal element exposed for frequency adjustment purposes. Locating the heating element and electrodes on opposite sides of the crystal element generates a constant temperature which has been found effective to uniformly heat a piezoelectric effect crystal element, and with appropriate control circuitry, allows for temperature stabilization of the crystal element.

REFERENCES:
patent: 3165651 (1965-01-01), Bechmann
patent: 3201621 (1985-08-01), Milner
patent: 3202846 (1965-08-01), Ballato et al.
patent: 3431392 (1969-03-01), Garland et al.
patent: 3478573 (1969-11-01), King, Jr.
patent: 3715563 (1973-02-01), Bloch
patent: 3818254 (1974-06-01), Persson
patent: 4091303 (1978-05-01), Tadataka et al.
patent: 4518944 (1985-05-01), Faris
Lateral-Field Excitation of Quartz Plates, by E. R. Hatch et al., IEEE Ultrasonics Symposium, 1983.

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