ZINC-OXIDE FILM MICROWAVE ACOUSTIC TRANSDUCERS
- 1 January 1967
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 10 (1) , 9-10
- https://doi.org/10.1063/1.1754800
Abstract
Thin‐film zinc‐oxide microwave acoustic transducers have been formed successfully by vacuum deposition techniques upon a cooled substrate (−50°C) by evaporation of zinc with an oxygen beam. The films are hexagonal preferentially oriented with c axis normal to the substrate. A device consisting of a ZnO film (1.9 μ) deposited on a metallic film on a sapphire delay line had a one‐way conversion loss of 6 dB at 1.6 GHz with a large bandwidth indicating that zinc‐oxide thin films deposited by this method make good ultrasonic transducers at frequencies above 1 GHz.Keywords
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