| Title | Theorectical Optimazation of Surface Acoustic Waves Resonator Based on 30° Y-Cut Linbo3/SIO2/SI Multilayered Structure |
| Publication Type | Conference Paper |
| Year of Publication | 2021 |
| Authors | WANG, Yuan-yuan, LI, Cui-ping, MA, Jun, Yan, Xiao-peng, QIAN, Li-rong, Yang, Bao-he, TIAN, Ya-hui, LI, Hong-lang |
| Conference Name | 2020 15th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) |
| Date Published | apr |
| Keywords | acoustic coupling, finite element method, Human Behavior, Lithium niobate, Lithium niobate (LiNbO3), Multilayer structure, Nonhomogeneous media, pubcrawl, Radio frequency, Resiliency, SAW filters, Scalability, Shear-horizontal surface acoustic wave, Silicon compounds, surface acoustic wave devices, Surface acoustic waves |
| Abstract | Surface acoustic wave devices based on LiNbO3/interlayer/substrate layered structure have attracted great attention due to the high electromechanical coupling coefficient (K2) of LiNbO3 and the energy confinement effect of the layered structure. In this study, 30deg YX-LiNbO3 (LN)/SiO2/Si multilayered structure, which can excited shear-horizontal surface acoustic wave (SH-SAW) with high K2, was proposed. The optimized orientation of LiNbO3 was verified by the effective permittivity method based on the stiffness matrix. The phase velocity, K2 value, and temperature coefficient of frequency (TCF) of the SH-SAW were calculated as a function of the LiNbO3 thickness at different thicknesses of the SiO2 in 30deg YX-LiNbO3/SiO2/Si multilayer structure by finite element method (FEM). The results show that the optimized LiNbO3 thickness is 0.1 and the optimized SiO2 thickness is 0.2l. The optimized Al electrode thickness and metallization ratio are 0.07 and 0.4, respectively. The K2 of the SH-SAW is 29.89%, the corresponding phase velocity is 3624.00 m/s and TCF is about 10 ppm/degC with the optimized IDT/30deg YX-LiNbO3/SiO2/Si layered structure. |
| DOI | 10.1109/SPAWDA51471.2021.9445459 |
| Citation Key | wang_theorectical_2021 |
Theorectical Optimazation of Surface Acoustic Waves Resonator Based on 30° Y-Cut Linbo3/SIO2/SI Multilayered Structure