压电与声光, 2022, 44 (5): 709, 网络出版: 2023-01-27
AlN薄膜异质结构声波激发特性研究
Study on Acoustic Excitation Characteristics of AlN Thin Film Heterogeneous Structure
谐振器 声波激励 氮化铝钪 温度稳定性 机电耦合系数 resonator acoustic excitation ScAlN temperature stability electromechanical coupling coefficient
摘要
该文分别开发了两种基于AlN压电材料和原子数分数为10%的Sc掺杂AlN压电材料的薄膜叠层异质谐振器。通过有限元仿真和实验对比分析了器件的频率温度性能和Sc掺杂对谐振器声激励的影响。结果表明,Sc掺杂可能会影响压电薄膜叠层谐振器所激励声波的谐振频率、机电耦合系数和对应的频率温度系数(TCF),且对所激励声波的正反谐振点的TCF影响不同。此研究在传感及滤波器件领域极具应用潜力。
Abstract
Two kinds of thin film heterogeneously stacked resonators based on AlN piezoelectric material and 10% Sc-doped AlN piezoelectric material respectively have been developed in this paper. The effect of Sc doping on the acoustic excitation of the resonator and the frequency-temperature performance of the device are compared and analyzed by the finite element simulation and experiment. The results show that Sc doping may affect the resonant frequency, electromechanical coupling coefficient and corresponding frequency-temperature coefficient (TCF) of the acoustic wave excited by the piezoelectric thin-film stacked resonator, and has different effects on the TCF of the resonant and anti-resonant points of the excited acoustic wave. This work has great application potential in the field of sensors and filters.
齐梦珂, 李孟辉, 程一民, 潘虹芝, 曹亮, 牟笑静. AlN薄膜异质结构声波激发特性研究[J]. 压电与声光, 2022, 44(5): 709. QI Mengke, LI Menghui, CHENG Yimin, PAN Hongzhi, CAO Liang, MU Xiaojing. Study on Acoustic Excitation Characteristics of AlN Thin Film Heterogeneous Structure[J]. Piezoelectrics & Acoustooptics, 2022, 44(5): 709.