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US 4,070,502 AGranted
Method of treating piezoelectric resonators
OwnerJohn R. Vig, Raymond L. Fillerinventors
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Abstract
The apparent angle of cut of a quartz crystal resonator blank is shifted so as to give the quartz resonator a desired frequency versus temperature characteristic.
Claims6
A method of shifting the apparent angle of cut of a piezoelectric resonator blank so as to give the piezoelectric resonator a desired frequency versus temperature characteristic including the steps of
- A. measuring the angle of cut of the piezoelectric resonator blank;
- B. determining the shift in apparent angle of cut required to give the piezoelectric resonator the desired frequency versus temperature characteristic;
- C. selecting the shape, area and thickness of a strongly adherent film to be deposited;
- D. determining the orientation on the piezoelectric resonator blank of the area selected so as to shift the apparent angle of cut of the piezoelectric blank to the value that will give the piezoelectric resonator the desired frequency versus temperature characteristic;
- and
- E. depositing the strongly adherent film onto the piezoelectric resonator blank at the orientation determined in step D, said strongly adherent film having the shape, area, and thickness selected in step C.
3 more elements
Dependencies are inferred from the claim text.