Microsystem Technologies

, Volume 24, Issue 5, pp 2215–2222 | Cite as

Influence of the side etching effect in DRIE on performance of electrostatic linear comb-drive actuators

  • Phuc Hong Pham
  • Lam Bao Dang
Technical Paper


Side etching and scalloping are unwanted but unavoidable phenomenon occurring during fabrication process of micro electro-mechanical system devices with the deep reactive ion etching technology. This paper reports the influence of deep reactive ion etching fabrication errors on the geometrical dimension (as a comb finger shape, width of the suspension beam), electrostatic force and displacement of electrostatic linear comb-drive actuators. A number of deep reactive ion etching experiments were carried out in order to find out the optimal etching and passivation time, which allows to achieve vertical and smooth sidewall, as well as acceptable side etching value. Discussion and evaluation of deviation between the theoretically calculated and measured displacements of the electrostatic linear comb-drive actuator were also reported.



This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant number “107.01-2015.18”.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.School of Mechanical EngineeringHanoi University of Science and Technology (HUST)HanoiVietnam
  2. 2.Vietnam-Japan International Institute for Science of TechnologyHUSTHanoiVietnam

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