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Characterization of Stiffness Coefficients of Silicon Versus Temperature using "Poisson's Rati" Measurements

  • Cho, Chun-Hyung (Department of Electronic & Electrical Engineering, College of Science and Technology, Hongik University) ;
  • Cha, Ho-Young (School of Electronic & Electrical Engineering, College of Engineering, Hongik Unversity) ;
  • Sung, Hyuk-Kee (School of Electronic & Electrical Engineering, College of Engineering, Hongik Unversity)
  • Received : 2015.07.23
  • Accepted : 2015.10.14
  • Published : 2016.04.30

Abstract

The elastic material constants, stiffness constants ($c_{11}$, $c_{12}$, and $c_{44}$), are three unique coefficients that establish the relation between stress and strain. Accurate knowledge of mechanical properties and the stiffness coefficients for silicon is required for design of Micro-Electro-Mechanical Systems (MEMS) devices for proper modeling of stress and strain in electronic packaging. In this work, the stiffness coefficients for silicon as a function of temperature from $-150^{\circ}C$ to $+25^{\circ}C$ have been extracted by using the experimental measurements of Poisson's ratio (${\nu}$) of silicon in several directions.

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References

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