Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Flow Characteristics and Filling Time Estimation for Underfill Process

언더필 공정에 대한 유동 특성과 침투 시간 예측 연구

  • Sim, Hyung-Sub (Graduate School of Mechanical Engineering, Chung-Ang University) ;
  • Lee, Seong-Hyuk (School of Mechanical Engineering, Chung-Ang University) ;
  • Kim, Jong-Min (School of Mechanical Engineering, Chung-Ang University) ;
  • Shin, Young-Eui (School of Mechanical Engineering, Chung-Ang University)
  • Published : 2007.06.30
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Abstract

The present study is devoted to investigate the transient flow and to estimate the filling time fur underfill process by using the numerical model established on the fluid momentum equation. For optimization of the design and selection of process parameters, this study extensively presents an estimation of the filling time in the view points of some important factors related to underfill materials and flip-chip geometry. From the results, we conclude that the filling time changes with respect to the under fill materials because of different viscosity, surface tension coefficient and contact angle. It reveals that, as the gap height increases, the filling time decreases substantially, and goes to the saturated values.

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References

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