Fabrication of MEMS Resonators in Thin SOI

Details Fabrication of MEMS Resonators in Thin SOI Fabrication of MEMS Resonators in Thin SOI

2008-02-21

arxiv.org/abs/0802.3040v1

Dans Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS - DTIP 2007, Stresa, lago Maggiore : Italie (2007)

Computer Science

Other Computer Science

Submitted on behalf of EDA Publishing Association (http://irevues.inist.fr/EDA-Publishing)

Scientific paper

A simple and fast process for micro-electromechanical (MEM) resonators with deep sub-micron transduction gaps in thin SOI is presented in this paper. Thin SOI wafers are important for advanced CMOS technology and thus are evaluated as resonator substrates for future co-integration with CMOS circuitry on a single chip. As the transduction capacitance scales with the resonator thickness, it is important to fabricate deep sub-micron trenches in order to achieve a good capacitive coupling. Through the combination of conventional UV-lithography and focused ion beam (FIB) milling the process needs only two lithography steps, enabling therefore a way for fast prototyping of MEM-resonators. Different FIB parameters and etching parameters are compared in this paper and their effect on the process are reported.

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