Method for adjusting the frequency of a piezoelectric crystal re

Details Method for adjusting the frequency of a piezoelectric crystal re Method for adjusting the frequency of a piezoelectric crystal re

1980-01-15

1985-12-31

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

29 2535, H01L 4108

Patent

active

045623708

ABSTRACT:
A process for adjusting the frequency of a resonator by bursts of laser beam shots which pierce successive lines or holes in a metal coating deposited on the resonator. The amount of material removed by a burst of shots varies in the course of the operating procedure so that the frequency of the resonator is adjusted towards the desired frequency by successive approximations. After each burst of shots, the frequency of the resonator is compared to a provisional limit frequency. The amount of material removed in the following line and the provisional limit frequency are changed or left unaltered, depending on the result of the comparison.

REFERENCES:
patent: Re30506 (1981-02-01), Nakata
patent: 3913195 (1975-10-01), Beaver
patent: 3969640 (1976-07-01), Staudte
patent: 4062154 (1977-12-01), Hugenin et al.
patent: 4131484 (1978-12-01), Caruso et al.

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