Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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HEAT-TREATMENT OF LARGE-SCALE GLASS BACKPLANES IN A MUFFLE FURNACE

머플 가열로에서의 대면적 유리기판의 가열공정에 대한 열적 연구

  • Kim, D.H. (Dept. of Mechanical and System Design Engineering, Hongik Univ.) ;
  • Son, G. (Dept.. of Mechanical Engineering, Sogang Univ.) ;
  • Hur, N. (Dept.. of Mechanical Engineering, Sogang Univ.) ;
  • Kim, B.K. (Viatron Technologies, Suwon Industrial Complex) ;
  • Kim, H.J. (Viatron Technologies, Suwon Industrial Complex) ;
  • Park, S.H. (Dept. of Mechanical and System Design Engineering, Hongik Univ.)
  • Received : 2012.10.22
  • Accepted : 2012.10.25
  • Published : 2012.12.31
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Abstract

Current display manufacturing processes apply thermal treatment of glass backplanes widely for hydrogen degassing, crystallization of thin-films, tempering, forming, and precompaction. Estimation of the characteristics of transient heating stages and thermal non-uniformities on a single glass substrate or in a stack of glasses are extremely helpful to understand non-homogeneity of mechanical and electronic features of nano/micro structures of end products. Based on simple heat transfer models and using an electric muffle furnace, temperature variations in a glass stack were predicted and measured for glass backplanes of $1.5{\times}1.85m^2$ in size and 0.7 mm in thickness. Except for the period of putting glass backplanes into the furnace, thermal radiation was the major heating mechanism for the treatment and theoretical predictions agreed well to the experimental temperatures on the backplanes. Using the theoretical model, thermal fields for a glass stack of glass-size, $2.2{\times}2.5m^2$, and of the number of sheets, 1 to 12, were calculated for practical design and manufacturing of the muffle furnace for large-scale displays, e.g. up to $8^{th}$ generation.

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References

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