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Piezoelectric thin films: evaluation of electrical and electromechanical characteristics for MEMS devices

机译:压电薄膜:评估MEMS器件的电气和机电特性

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摘要

We present a new measurement method to characterize piezoelectric thin films utilizing a four-point bending setup. In combination with a single- or a double-beam laser interferometer, this setup allows the determination of the effective transverse and longitudinal piezoelectric coefficients e31,f and d33,f respectively. Additionally, the dielectric coefficient and the large signal electrical polarization are measured to add further important characteristics of the film. These data are essential for piezoelectric thin film process specification and the design and qualification of microelectromechanical systems devices
机译:我们提出了一种利用四点弯曲装置表征压电薄膜的新测量方法。结合单光束或双光束激光干涉仪,此设置可分别确定有效的横向和纵向压电系数e31,f和d33,f。另外,测量介电系数和大信号电极化以增加膜的其他重要特性。这些数据对于压电薄膜工艺规范以及微机电系统设备的设计和鉴定至关重要

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