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A Novel Micro Tensile Testing Instrument with Replaceable Testing Specimen by Parylene Passivation Technique

Published online by Cambridge University Press:  01 February 2011

Yung-Dong Lau ,
Tso-Chi Chang ,
Hong Hocheng ,
Rongshun Chen  and
Weileun Fang
Yung-Dong Lau
Affiliation:
d947725@oz.nthu.edu.tw, National Tsing Hua University, Power Mechanical Engineering, 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan, 886-3-5742605, 886-3-5739372
Tso-Chi Chang
Affiliation:
d947725@oz.nthu.edu.tw, National Tsing Hua University, Department of Power Mechanical Engineering, 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
Hong Hocheng
Affiliation:
d947725@oz.nthu.edu.tw, National Tsing Hua University, Department of Power Mechanical Engineering, 101, Section 2, Kua ng-Fu Road, Hsinchu, 30013, Taiwan
Rongshun Chen
Affiliation:
d947725@oz.nthu.edu.tw, National Tsing Hua University, Department of Power Mechanical Engineering, 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
Weileun Fang
Affiliation:
d947725@oz.nthu.edu.tw, National Tsing Hua University, Department of Power Mechanical Engineering, 101, Section 2, Kua ng-Fu Road, Hsinchu, 30013, Taiwan
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Abstract

This study has successfully demonstrated a novel tensile testing approach to mount the thin film test specimen onto the MEMS instrument using microfabrication process. The MEMS instrument consists of thermal actuator, differential capacitance sensor, supporting spring. The thermal actuator applies tensile load on the test specimen to characterize the Young's modulus and the residual stress of thin films. As compare with the existing approaches, the problems and difficulties resulting from the alignment and assembly of thin film test specimens with the testing instrument can be prevented. Furthermore, the parylene passivation technique of MEMS fabrication process allows the changing of testing film materials easily. In application, the present approach has been employed to determine the Young's modulus and the residual stress of Al films.

Keywords

microelectro-mechanical (MEMS)elastic propertiesAl
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1052: Symposium DD – Microelectromechanical Systems–Materials and Devices , 2007 , 1052-DD02-08
Copyright
Copyright © Materials Research Society 2008

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