Abstract

A three-axis capacitive accelerometer based on SOI is presented. Acceleration is detected by both in-plane and vertical comb electrodes. Separating the three-axis sensing with different groups of comb electrodes enables direct detection for each axis with full differential capacitive sensing scheme. The capacitance sensitivities of X and Y accelerometer are 160.7 fF/g and Z accelerometer 21.6 fF/g.

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