Accession Number : ADP002476

Title :   The Stress Coefficient of Frequency of Quartz Plate Resonators,

Corporate Author : ARMY ELECTRONICS RESEARCH AND DEVELOPMENT COMMAND FORT MONMOUTH NJ ELECTRONICS TECHNOLOGY/DEVICES LAB

Personal Author(s) : Mizan,M. ; Ballato,A.

Report Date : 1983

Pagination or Media Count : 6

Abstract : The stress-frequency effect exists for both bulk and surface acoustic wave devices, and has been studied for more than thirty years. Eight years ago these studies led to the discovery of the SC-, or stress-compensated cut, which has found widespread acceptance for many frequency control applications. The calculations required to obtain Kf(psi) characterizing the effects are very elaborate, incorporating as they do the influences of lattice deformation and the third-order elastic constants. These calculations have been carried out previously by EerNisse for the three thickness plate modes at six phi values on the upper zero temperature coefficient (ZTIC) locus. The results have now been used to extract simple polynomial coefficients that permit computation of Kf(psi), as well as several other pertinent measures, in simple engineering form for intermediate phi values.

Descriptors :   *Quartz resonators, *Stresses, *Frequency response, Crystals, Acoustic waves, Cutting, Piezoelectric crystals, Frequency, Stress analysis

Distribution Statement : APPROVED FOR PUBLIC RELEASE