Indian Journal of Science and Technology
Year: 2015, Volume: 8, Issue: 14, Pages: 1-9
P. K. Senthil Kumar1*, R. Elavarasi2 , Paul Braineard Eladi1 and M. Gopikrishnan3
1 SRM University, Kattankulathur, Chennai, 603203, India; [email protected]
2 AMET University, Chennai, 603112, India; [email protected]
3 Bharath University, Chennai, 600073, India
The present work involves the study of pull-in voltage of MEMS electrostatic Cantilever beam, Fixed-Fixed beam and modified beam structures with perforations of square, rectangular and circular shapes. The analysis is done using COMSOL 4.3 software. The dimensions of the Cantilever beam, Fixed-Fixed beam and three various structured beams modeled in this paper are length = 300 µm, width = 50 µm, thickness = 3 µm and gap between top electrode and ground plane is 2.5 µm. The pull-in voltage obtained for Cantilever beam is 17.6 V and for Fixed-Fixed beam is 118.8 V. For the modified models with square, rectangular and circular perforations are 12.18 V, 15.45 V and 13.75 V respectively. The results of the work demonstrate an ability to achieve lower pull-in voltage levels for three various structured beams modeled in this paper when compared to cantilever and Fixed-fixed beams. The dependence of the pull-in voltage on geometrical parameters, thrusts on stringent design considerations even at the initial stages.
Keywords: Cantilever, COMSOL, Deflection, Fixed-Fixed, Perforated beams, Pull-in Voltage
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