Design and fabrication of a micro-electromechanical system sandwich capacitive accelerometer

  • Xiaofeng Zhou
  • , Youling Lin
  • , Lufeng Che*
  • , Xiaolin Li
  • , Jian Wu
  • , Yuelin Wang
  • *Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper reports a micro-gravity MEMS sandwich capacitive accelerometer with symmetrical double-sided folded beam-mass structure. The beam-mass structure is fabricated from a single double-device-layer SOI wafer (D-SOI). The fabrication process produced proof mass with though wafer thickness (860μm) to enable formation of a larger proof mass. The suspension system of eight folded beams with highly controllable dimension suspends the proof mass from both sides. A sandwich differential capacitive accelerometer based on symmetrical double-sided folded beams-mass structure is fabricated by three-layer silicon/silicon wafer direct bonding. The resonance frequency of the developed device is measured in an open-loop system by a network analyzer. The quality factor and the resonant frequency are 18 and 830Hz, respectively. The accelerometer has a closed-loop sensitivity of 1.8V/g and a nonlinearity of 0.52% over the range of 1g.

Original languageEnglish
Title of host publication9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE-NEMS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages28-31
Number of pages4
ISBN (Electronic)9781479947270
DOIs
StatePublished - 23 Sep 2014
Externally publishedYes
Event9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE-NEMS 2014 - Waikiki Beach, United States
Duration: 13 Apr 201416 Apr 2014

Publication series

Name9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE-NEMS 2014

Conference

Conference9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE-NEMS 2014
Country/TerritoryUnited States
CityWaikiki Beach
Period13/04/1416/04/14

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