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Indexed by:会议论文

Date of Publication:2013-07-01

Included Journals:EI

Volume:613

Page Number:251-258

Abstract:In this paper, substrate curvature method was adopted and a theory model based on Stoney's formula was built for obtaining the internal stress of SU-8 film. The effect of substrate diameter, film thickness and post-baked temperature on substrate curvature ratio was investigated by ANSYS simulation. The analytical result shows that post-baked temperature is the main effect factor on internal stress of SU-8 film. In addition, internal stresses of SU-8 at three different post-temperatures (55°C, 70°C and 85°C) are measured. The results show that the experimental results greatly agreed with simulation analytical results. It means the internal stress of SU-8 film can be accurately described by the theory model, which provides a basis for the quantitative analysis of the internal stress in SU-8 film. © (2014) Trans Tech Publications, Switzerland.