Abstract
Most of the MEMS inertial switches developed in recent years are intended for shock and impact sensing above 40 g. These switches are fabricated based on non-silicon surface micromachining with multiple steps of electroplating. In this paper, a silicon based low-g inertial switch typically used for linear acceleration sensing is designed and fabricated. The inertial switch consists of a high volume proof mass and low stiffness spiral spring and is fabricated on a special designed double-buried layer SOI wafer with standard silicon micromachining. The measurements results show that the threshold value is about 7.42 g which is in accordance with FEM calculation.
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