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Proceedings Paper

Mechanical properties of MEMS materials: reliability investigations by mechanical- and HRXRD-characterization related to environmental testing
Author(s): T. Bandi; H. Shea; A. Neels
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Paper Abstract

The performance and aging of MEMS often rely on the stability of the mechanical properties over time and under harsh conditions. An overview is given on methods to investigate small variations of the mechanical properties of structural MEMS materials by functional characterization, high-resolution x-ray diffraction methods (HR-XRD) and environmental testing. The measurement of the dynamical properties of micro-resonators is a powerful method for the investigation of elasticity variations in structures relevant to microtechnology. X-ray diffraction techniques are used to analyze residual strains and deformations with high accuracy and in a non-destructive manner at surfaces and in buried micro-structures. The influence of elevated temperatures and radiation damage on the performance of resonant microstructures with a focus on quartz and single crystal silicon is discussed and illustrated with examples including work done in our laboratories at CSEM and EPFL.

Paper Details

Date Published: 5 June 2014
PDF: 12 pages
Proc. SPIE 9113, Sensors for Extreme Harsh Environments, 911309 (5 June 2014); doi: 10.1117/12.2050617
Show Author Affiliations
T. Bandi, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Ecole Polytechnique Fédérale de Lausanne (Switzerland)
H. Shea, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
A. Neels, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)

Published in SPIE Proceedings Vol. 9113:
Sensors for Extreme Harsh Environments
Debbie G. Senesky; Sachin Dekate, Editor(s)

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