Acoustic wave devices involving perturbation of acoustic...

Details Acoustic wave devices involving perturbation of acoustic... Acoustic wave devices involving perturbation of acoustic...

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H03H 7/01 (2006.01) B06B 1/00 (2006.01) G10K 11/24 (2006.01) G10K 11/36 (2006.01) H03H 3/08 (2006.01) H03H 9/00 (2006.01) H03H 9/02 (2006.01) H03H 9/30 (2006.01) H03H 9/64 (2006.01) H03H 9/72 (2006.01) H04B 11/00 (2006.01)

Patent

CA 1055126

ACOUSTIC WAVE DEVICES INVOLVING PERTURBATION OF ACOUSTIC VELOCITY BY DIFFUSION OF METALS Abstract of the Disclosure Acoustic waveguides, acoustic filters and acoustic reflectors are based upon the discovery of increased acoustic wave velocity in materials such as lithium niobate and lithium tantalate into which a metal such as titanium, nickel or chromium has been diffused. Velocity increases larger than 1 percent have been obtained; and negligible effect on acoustic loss is incurred thereby. The technique and the resulting devices result in a simpler structure than provided by the metallic strips or the ion beam etched surface regions of prior acoustic devices in which velocity perturbations of comparable magnitude have been desired.

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