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http://dx.doi.org/10.6112/kscfe.2012.17.4.016

HEAT-TREATMENT OF LARGE-SCALE GLASS BACKPLANES IN A MUFFLE FURNACE  

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.)
Publication Information
Journal of computational fluids engineering / v.17, no.4, 2012 , pp. 16-23 More about this Journal
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.
Keywords
Thermal Treatment; Glass Substrate; Large-Scale Display;
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