An experimental study on the ZnO/Sapphire layered surface acoustic wave device
Resource
Journal of Applied Physics 96 (9): 5249-5253
Journal
Journal of Applied Physics
Journal Volume
96
Journal Issue
9
Pages
5249-5253
Date Issued
2004
Date
2004
Author(s)
Wang, Wei-Shan
Abstract
In this study, ZnO thin films with different thicknesses were deposited on C-plane sapphire substrates by radio-frequency magnetron sputtering. Properties of interdigital transducer/ZnO/sapphire layered surface acoustic wave device including surface wave velocity, electromechanical coupling coefficient, and propagatiion loss were measured and discussed. Combining the effective permittivity approach and the coupling-of-modes (COM) model, the dispersion characteristics and frequency responses of the ZnO/sapphire layered structure were simulated. By substituting the measured parameters into the COM model, the simulated frequency response has shown good agreement with the experimental results.
Type
journal article
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