Reference : Design of Microswitch Systems Avoiding Stiction due to Surface Contact
Parts of books : Contribution to collective works
Engineering, computing & technology : Materials science & engineering
Engineering, computing & technology : Mechanical engineering
http://hdl.handle.net/2268/91043
Design of Microswitch Systems Avoiding Stiction due to Surface Contact
English
Wu, Ling mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
Noels, Ludovic mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3) >]
Rochus, Véronique [ > > ]
Pustan, Marius [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
Golinval, Jean-Claude mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
2011
MEMS and Nanotechnology, Volume 2
Proulx, Tom
Springer
Conference Proceedings of the Society for Experimental Mechanics Series
189-195
978-1-4419-8825-6
New York
[en] stiction ; mems
[en] Stiction which results from contact between surfaces is a major failure mode in micro electro-mechanical systems (MEMS). Increasing restoring forces using high spring constant allows avoiding stiction but leads to an increase of the actuation voltage so that the switch’s efficiency is threatened. A statistical rough surfaces interaction model, based on Maugis’ and Kim’s formulations is applied to estimate the adhesive forces in MEMS switches. Based on the knowledge of these forces, the proper design range of the equivalent spring constant, which is the main factor of restoring force in MEMS switches, can be determined. The upper limit of equivalent spring constant depends mainly on the expected actuator voltage and on the geometric parameters, such as initial gap size and thickness of dielectric layer. The lower limit is assessed on the value of adhesive forces between the two contacting rough surfaces. It mainly depends on the adhesive work of contact surfaces and on the surfaces’ roughness. In order to study more complicated structures, this framework will be used in a multiscale model: resulting unloading micro adhesive contact-distance curves of two rough surfaces will be used as contact forces in a finite-element model. In this paper the extraction of these curves for the particular case of gold to gold micro-switches is pursued.
Researchers ; Professionals
http://hdl.handle.net/2268/91043
10.1007/978-1-4419-8825-6_27
http://dx.doi.org/10.1007/978-1-4419-8825-6_27
Copyright 2011 Springer, ©2010 Society for Experimental Mechanics Inc.

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