Frequency fine-adjusting apparatus for a piezo-electric oscillat

Details Frequency fine-adjusting apparatus for a piezo-electric oscillat Frequency fine-adjusting apparatus for a piezo-electric oscillat

1990-04-11

1991-07-30

Nguyen, Nam X.

Coating apparatus

Gas or vapor deposition

Crucible or evaporator structure

118718, 118724, C23C 1600

Patent

active

050352024

ABSTRACT:
Piezo-electric oscillators are widely used in reference clocks for various apparatus. Prior to use, the oscillation frequency of the piezo-electric oscillators is generally finely adjusted. For this purpose, a frequency fine-adjusting apparatus includes a laser beam generator for emitting a laser beam having a wavelength of 2 .mu.m or less, a target material having a metallic layer, a set of rollers for feeding the target material in the condition in which the metallic layer confronts the main electrode of the piezo-electric oscillator and is spaced a predetermined length from the main electrode, and an optical system for applying the laser beam to the metallic layer. When the laser beam is applied to the metallic layer, part of the metallic layer is vaporized and adheres to the surface of the main electrode, thereby finely adjusting an oscillation frequency of the piezo-electric oscillator.

REFERENCES:
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patent: 3912830 (1975-10-01), Murayama et al.
patent: 4340654 (1982-07-01), Campi
patent: 4631197 (1986-12-01), DeFreese et al.
patent: 4664769 (1987-05-01), Cuomo et al.
patent: 4752455 (1988-06-01), Mayer
patent: 4767931 (1988-08-01), Sato et al.
von Gutfeld, "Enhancing . . . Printing", IBM Tech. Dis. Bulletin, vol. 17, No. 6, 11/74, pp. 1807-1808.

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