A fully symmetrical capacitive accelerometer with precisely controllable capacitor gap

Jian Mao, Lufeng Che, Youling Lin, Yufang Li, Xiaofeng Zhou, Bin Xiong, Yuelin Wang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

This paper presents a fully symmetrical capacitive accelerometer. The sensor is a sandwich structure which is fabricated by silicon four-layer bonding and packaged at wafer-level in a vacuum. The precisely controllable original capacitor gap and the bumpers of the sensor are formed by multi-oxidation. The fabricated accelerometer has the sensitivity of 0.59 V/g, the resonance frequency of 657 Hz and the quality factor of 198.

Original languageEnglish
Pages (from-to)143-146
Number of pages4
JournalGuti Dianzixue Yanjiu Yu Jinzhan/Research and Progress of Solid State Electronics
Volume29
Issue number1
StatePublished - Mar 2009
Externally publishedYes

Keywords

  • Capacitive accelerometer
  • Capacitor gap control
  • Silicon-silicon bonding
  • Wafer-level vacuum package

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