New Materials for Surface Acoustic Wave (SAW) Devices

Robert M. O&apos;Connell; Paul H. Carr

doi:10.1117/12.7972113

1 October 1977 New Materials for Surface Acoustic Wave (SAW) Devices

Robert M. O'Connell, Paul H. Carr

Author Affiliations +

Optical Engineering, Vol. 16, Issue 5, 165440 (October 1977). https://doi.org/10.1117/12.7972113

Abstract

Advances in state-of-the-art of surface acoustic wave (SAW) device technology will require better substrate materials than those currently available. Calculations of the surface acoustic wave properties of several materials including the quartz derivatives berlinite (A1PO4 ) and 0-eucryptite (0-Li Al SiO4), certain sulfosalts, and a composite structure, have produced several temperature-compensated crystallographic orientations with greater piezoelectric coupling than that of ST cut quartz. These materials make possible the development of improved broadband, low insertion loss devices with temperature-independent performance characteristics. Methods of growing improved aluminum nitride (A1N) are being studied. Because the SAW velocity of this material is about twice that of currently used materials, A1N promises to extend the upper frequency limit of SAW devices beyond 2 GHz.

Citation Download Citation

Robert M. O'Connell and Paul H. Carr "New Materials for Surface Acoustic Wave (SAW) Devices," Optical Engineering 16(5), 165440 (1 October 1977). https://doi.org/10.1117/12.7972113

Published: 1 October 1977

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