Nano Science and Technology Institute
Nanotech 2004 Vol. 2
Nanotech 2004 Vol. 2
Technical Proceedings of the 2004 NSTI Nanotechnology Conference and Trade Show, Volume 2
 
Chapter 6: MEMS Modeling
 

New Accurate 3-D Finite Element Technology for Solving Geometrically Complex Coupled-Field Problems

Authors:I. Avdeev, M. Gyimesi, M. Lovell and D. Ostergaard
Affilation:University of Pittsburgh, US
Pages:323 - 326
Keywords:strong coupling, 3-D modeling, MEMS, FEA
Abstract:Increased functionality of microelectromechanical systems (MEMS) has lead to the development of micro-scale devices that are geometrically complex. These complex configurations require the development of new and more efficient finite element (FE) techniques for modeling MEMS devices. This is primarily due to the fact that lumped modeling and semi-analytical approaches are not applicable for complicated geometries where fringing electrostatic fields are dominant. In the present investigation, a novel strongly coupled 3-D tetrahedral transducer element is introduced for modeling the quasi-static behavior of analog electrostatic MEMS devices. This new transducer element, which can be utilized for a broad range of micro-system applications (i.e. combdrives, micromirrors, and electrostatic motors), is compatible with conventional electrostatic and structural 3-D finite elements. The element is capable of efficiently modeling interaction between deformable or rigid conductors that generate an electrostatic field. Strong coupling between the electrostatic and mechanical domains allows the static element formulation to be extended to transient and full harmonic analyses. Therefore, in many respects, the element is the most sophisticated FEA tool available for modeling MEMS problems where dominant fringing fields develop. The new technology is also very efficient in determining the pull-in parameters of complicated multi-electrode microdevices.
New Accurate 3-D Finite Element Technology for Solving Geometrically Complex Coupled-Field ProblemsView PDF of paper
ISBN:0-9728422-8-4
Pages:519
Hardcopy:$79.95
 
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