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Journal of Micro/Nanolithography, MEMS, and MOEMS

Modeling and testing of the collective effects of thermoelastic and fluid damping on silicon MEMS resonators
Author(s): Yun-Bo Yi; Amir Rahafrooz; Siavash Pourkamali
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Paper Abstract

Thermoelastic damping and fluid damping may collectively affect the resonant behaviors of silicon resonators. A finite element model is developed to predict the characteristics of the out-of-plane resonance, and the results are verified by experiments. The implementation of the perturbation method leads to an eigenvalue equation, from which the resonant frequency and the quality factor can be evaluated. The fluid damping problem is formulated by augmenting the governing equation with a linear damping term, whose coefficient is inversely determined from the experimental correlations. With the incorporation of the fluid damping term, the computational prediction achieves a good agreement with the experiment. The same method can also be extended to study the in-plane vibration of beam resonators.

Paper Details

Date Published: 1 April 2009
PDF: 7 pages
J. Micro/Nanolith. 8(2) 023010 doi: 10.1117/1.3129830
Published in: Journal of Micro/Nanolithography, MEMS, and MOEMS Volume 8, Issue 2
Show Author Affiliations
Yun-Bo Yi, Univ. of Denver (United States)
Amir Rahafrooz, Univ. of Denver (United States)
Siavash Pourkamali, Univ. of Denver (United States)

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