Large range MEMS motion detection using integrated piezo-resistive silicon nanowire
2012
Electrostatically actuated MEMS devices integrating surface micromachined silicon piezoresistive nanowires were batch processed to investigate a silicon nanowire detection scheme allowing an arbitrary choice of MEMS motion detection range and an increase of nanowire gauge factor measurement stress resolution. It is demonstrated that an in-plane MEMS displacements up to 180 nm with a resolution down to a few Angstroms can be achieved as well as a MEMS resonance detection. Results are compared with ex-situ MEMS optical microscopy and in-situ capacitive measurements of MEMS displacement.
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