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An electrostatic actuated micro-structure for high-cycle fatigue testing

Polido Gomes, J.; Kowal, J. and Edwards, L. (2005). An electrostatic actuated micro-structure for high-cycle fatigue testing. In: Proceedings of the 2005 SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 7-9 June 2005, Portland, Oregon, USA.

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Abstract

Fatigue failure knowledge of polycrystalline silicon (polysilicon) thin films is crucial for the design of efficient microelectromechanical systems (MEMS). Reliability investigations of polysilicon thin films are normally conducted by subjecting a population of micron-scale fracture mechanics specimens to cyclic loading while testing in laboratory air or cvacuum conditions. The present work describes the design of two fully-integrated micromachined fatigue-characterization specimens fabricated for high-cycle fatigue testing of 2-um thick polysilicon thin films. Preliminary results were obtained from tests conducted on a 2-um resonant structure that works at fully reversed, constant amplitude stresses at a frequency of about 46 kHz. The present work permitted the characterization of the motion of the structure and calibration of the imaging system.

Item Type: Conference Item
Extra Information: ISBN - 0-912053-90-9
Keywords: MEMS; fatigue failure; polysilicon; resonant
Academic Unit/Department: Mathematics, Computing and Technology > Engineering & Innovation
Item ID: 6975
Depositing User: Jan Kowal
Date Deposited: 07 Jun 2007
Last Modified: 02 Dec 2010 19:57
URI: http://oro.open.ac.uk/id/eprint/6975
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