J. Semicond. > 2009, Volume 30 > Issue 5 > 054003

SEMICONDUCTOR DEVICES

A novel MEMS inertial sensor with enhanced sensing capacitors

Dong Linxi, Yan Haixia, Huo Weihong, Xu Li, Li Yongjie and Sun Lingling

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DOI: 10.1088/1674-4926/30/5/054003

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Abstract: A novel MEMS inertial sensor with enhanced sensing capacitors is developed. The designed fabricated process of the sensor is a deep RIE process, which can increase the mass of the seismic to reduce the mechanical noise, and the designed capacitance sensing method is changing the capacitance area, which can reduce the air damping between the sensing capacitor plates and reduce the requirement for the DRIE process precision, and reduce the electronic noise by increasing the sensing voltage to improve the resolution. The design and simulation are also verified by using the FEM tool ANSYS. The simulated results show that the transverse sensitivity of the sensor is approximately equal to zero. Finally, the fabricated process based on silicon–glass bonding and the preliminary test results of the device for testing grid capacitors and the novel inertial sensor are presented. The testing quality factor of the testing device based on the slide-film damping effect is 514, which shows that the enhanced capacitors can reduce mechanical noise. The preliminary testing result of the sensitivity is 0.492 pf/g.

Key words: capacitive accelerometer inertial sensor high precision DRIE

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    Dong Linxi, Yan Haixia, Huo Weihong, Xu Li, Li Yongjie, Sun Lingling. A novel MEMS inertial sensor with enhanced sensing capacitors[J]. Journal of Semiconductors, 2009, 30(5): 054003. doi: 10.1088/1674-4926/30/5/054003
    Dong L X, Yan H X, Huo W H, Xu L, Li Y J, Sun L L. A novel MEMS inertial sensor with enhanced sensing capacitors[J]. J. Semicond., 2009, 30(5): 054003. doi: 10.1088/1674-4926/30/5/054003.
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    Received: 18 August 2015 Revised: 14 January 2009 Online: Published: 01 May 2009

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      Dong Linxi, Yan Haixia, Huo Weihong, Xu Li, Li Yongjie, Sun Lingling. A novel MEMS inertial sensor with enhanced sensing capacitors[J]. Journal of Semiconductors, 2009, 30(5): 054003. doi: 10.1088/1674-4926/30/5/054003 ****Dong L X, Yan H X, Huo W H, Xu L, Li Y J, Sun L L. A novel MEMS inertial sensor with enhanced sensing capacitors[J]. J. Semicond., 2009, 30(5): 054003. doi: 10.1088/1674-4926/30/5/054003.
      Citation:
      Dong Linxi, Yan Haixia, Huo Weihong, Xu Li, Li Yongjie, Sun Lingling. A novel MEMS inertial sensor with enhanced sensing capacitors[J]. Journal of Semiconductors, 2009, 30(5): 054003. doi: 10.1088/1674-4926/30/5/054003 ****
      Dong L X, Yan H X, Huo W H, Xu L, Li Y J, Sun L L. A novel MEMS inertial sensor with enhanced sensing capacitors[J]. J. Semicond., 2009, 30(5): 054003. doi: 10.1088/1674-4926/30/5/054003.

      A novel MEMS inertial sensor with enhanced sensing capacitors

      DOI: 10.1088/1674-4926/30/5/054003
      • Received Date: 2015-08-18
      • Accepted Date: 2008-12-01
      • Revised Date: 2009-01-14
      • Published Date: 2009-04-20

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