Maouhoub, S. and Aoura, Y. and Mir, A. (2015) FEM simulation of Rayleigh waves for SAW devices based on ZnO/AlN/Si. Microelectronic Engineering, 136. pp. 22-25.

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Abstract

In this study, the propagation characteristics of surface acoustic waves (SAWs) in ZnO/Si and ZnO/AlN/Si structures are investigated. The phase velocity, the coupling coefficient and the temperature coefficient of frequency (TCF) of the first two modes of SAWs for the ZnO/Si structure are numerically analyzed and compared to experimental data. The results show that a large coupling coefficient of 3.5 associated with a phase velocity of 4600 m/s and a TCF of -42.8 ppm/°C are obtained in mode 1. Close agreement is achieved between the numerical and experimental results. Inserting an AlN layer between the ZnO and Si layers is shown to increase the performance of the SAW resonator. The simulation results indicate that for mode 0, a temperature compensation of 0 ppm/°C and high velocities of up to 4600 m/s are obtained by optimizing the AlN/ZnO thickness ratio. These results demonstrate that the ZnO/AlN/Si structure can be used to design wide-band and temperature-compensated SAW devices. © 2015 Elsevier B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Acoustic surface wave devices; Acoustic wave propagation; Acoustic waves; Acoustics; Finite element method; Phase velocity; Silicon; Temperature, AlN; Coupling coefficient; Propagation characteristics; Surface acoustic waves; Temperature coefficient of frequencies; Temperature compensated; Temperature compensation; ZnO, Zinc oxide
Subjects: Engineering
Divisions: SCIENTIFIC PRODUCTION > Engineering
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:47
URI: http://eprints.umi.ac.ma/id/eprint/3290

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