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Journal of Materials Science

, Volume 37, Issue 22, pp 4793–4799 | Cite as

The characterization of thermal and elastic constants for an epoxy photoresist SU8 coating

  • R. Feng
  • R. J. FarrisEmail author
Article

Abstract

All of the thermal and elastic constants of the high-aspect ratio, negative, UV resist, SU8 coating were carried out, and the compliance matrix of the coating was obtained. DSC, TGA, TMA, and DMTA techniques were utilized to study the thermal properties of the material. The in-plane thermal expansion coefficient (TEC) (α1) was determined by TMA, and the glass transition behavior was studied by DMTA. The TGA study provided information about the thermal stability of the material, and DSC was applied to study the thermal calorimetric properties of the material. The in-plane Young's modulus (E1) was measured by tensile tests. The residual stresses of a 1D stretched ribbon sample and a 2D stretched membrane sample were measured by vibrational holography tests, and the in-plane Poisson's ratio (ν1) was also determined by holography. The out-of-plane Poisson's ratio (ν2) was obtained by high pressure gas dilatometry measurements. The bulk compressibility (κ) and the volumetric TEC (α v ) of the material were measured by a pressure-volume-temperature (PVT) apparatus. Finally, the out-of-plane properties, including the out-of-plane TEC (α2) and the out-of-plane Young's modulus (E2), were calculated from the measured in-plane properties and the volumetric properties. Therefore, the compliance matrix of the studied SU8 coating could be obtained.

Keywords

Residual Stress Thermal Expansion Coefficient Dilatometry Compliance Matrix Bulk Compressibility 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  1. 1.Polymer Science and Engineering DepartmentUniversity of Massachusetts AmherstAmherstUSA

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