TY - JOUR
T1 - Microfabricated torsional actuators using self-aligned plastic deformation of silicon
AU - Kim, Jongbaeg
AU - Choo, Hyuck
AU - Lin, Liwei
AU - Muller, Richard S.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/6
Y1 - 2006/6
N2 - In this paper, we describe angular vertical-comb-drive torsional microactuators made in a new process that induces residual plastic deformation of single-crystal-silicon torsion bars. Critical dimensions of the vertically interdigitated moving-and fixed-comb actuators are self-aligned in the fabrication process and processed devices operate stably over a range of actuation voltages. We demonstrate MEMS scanning mirrors that resonate at 2.95 kHz and achieve optical scan angles up to 19.2 degrees with driving voltages of 40 V dc plus 13V pp. After continuous testing of five billion cycles at the maximum scanning angle, we do not observe any signs of degradation in the plastically deformed silicon torsion bars.
AB - In this paper, we describe angular vertical-comb-drive torsional microactuators made in a new process that induces residual plastic deformation of single-crystal-silicon torsion bars. Critical dimensions of the vertically interdigitated moving-and fixed-comb actuators are self-aligned in the fabrication process and processed devices operate stably over a range of actuation voltages. We demonstrate MEMS scanning mirrors that resonate at 2.95 kHz and achieve optical scan angles up to 19.2 degrees with driving voltages of 40 V dc plus 13V pp. After continuous testing of five billion cycles at the maximum scanning angle, we do not observe any signs of degradation in the plastically deformed silicon torsion bars.
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U2 - 10.1109/JMEMS.2006.876789
DO - 10.1109/JMEMS.2006.876789
M3 - Article
AN - SCOPUS:33745124698
VL - 15
SP - 553
EP - 562
JO - Journal of Microelectromechanical Systems
JF - Journal of Microelectromechanical Systems
SN - 1057-7157
IS - 3
ER -