Method of rotating a Bechmann curve of a quartz strip resonator

Details Method of rotating a Bechmann curve of a quartz strip resonator Method of rotating a Bechmann curve of a quartz strip resonator

1995-02-28

1996-11-26

Vo, Peter

Metal working

Piezoelectric device making

20419218, 310361, 310365, 310368, 324727, H01L 4122, G01R 2922

Patent

active

055773087

ABSTRACT:
A method of rotating a non-temperature compensated Bechmann curve of a quartz strip. The method includes the steps of determining (102) whether a crystallographic orientation of an AT cut quartz strip is within a desired specification; selecting (104) a predetermined nominal electrode coverage having a nominal electrode width for an in-specification AT cut quartz strip; and tuning (106) an out of specification crystallographic orientation, by: adjusting (108) the electrode width with respect to the nominal electrode width, to bring the out-of-specification crystallographic orientation of an out-of-specification AT cut crystal quartz to within a desired specification having an in-specification Bechmann curve with an inflection point; and rotating (110) an out-of-specification Bechmann curve about the inflection point to substantially approach the desired in-specification Bechmann curve.

REFERENCES:
patent: 3165651 (1965-01-01), Bechmann
patent: 3202846 (1965-08-01), Ballato et al.
patent: 4412172 (1983-10-01), Vig
patent: 4419600 (1983-12-01), Sinha
patent: 4625138 (1986-11-01), Ballato
patent: 4785232 (1988-11-01), Ballato et al.
patent: 5078834 (1992-01-01), Witte
patent: 5473216 (1995-12-01), Brosig et al.

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