Nano Science and Technology Institute
MSM 2000
MSM 2000
Technical Proceedings of the 2000 International Conference on Modeling and Simulation of Microsystems
Chapter 6: Characterization, Parameter Extraction, Calibration

3D Thermo-Electro-Mechanical Simulations of Gas Sensors Based on SOI Membranes

Authors:C-C. Lu, D. Setiadi, F. Udrea, W.I. Milne, J.A. Covington and J.W. Gardner
Affilation:Cambridge University, UK
Pages:297 - 300
Keywords:solid-state gas sensors, electro-thermal-mechanical simulations, SOI devices, multilayer mem-brane, device optimization
Abstract:3D thermo-electro-mechanical device simulations are presented of a novel fully CMOS-compatible MOSFET gas sensor operating in a SOI membrane. A comprehensive stress analysis of a Si-SiO2├▒based multilayer membrane has been performed to ensure a high degree of mechanical reliability at a high operating temperature (e.g. up to 400(C). Moreover, optimisation of the layout dimensions of the SOI membrane, in particular the aspect ratio between the membrane length and membrane thickness, has been carried out to find the best trade-off between minimal device power consumption and acceptable mechanical stress.
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