TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Filler: The filler is an inorganic oxide selected from soda glass, alkali free glass, silica, titanium dioxide, antimony oxide, titania, alumina, zirconia and/or tungsten oxide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Filler: The filler is an inorganic oxide selected from soda glass, alkali free glass, silica, titanium dioxide, antimony oxide, titania, alumina, zirconia and/or tungsten oxide.    TECHNOLOGY FOCUS - POLYMERS - Preferred Layer: The epoxy resin of the epoxy-resin layer (B), has a polysulfite type structure. The epoxy resin having a poly sulfite type structure, has formula (1).R1,R2=organic acids having bisphenol structure;andn=degree of polymerization.The epoxy resin further contains a cycloaliphatic epoxy resin. The layer (A) contains 9-60 wt.% of epoxy resin having polysulfite type structure, and 3-30 wt.% of filler. The average particle diameter of the filler is 1 nm to 100 microns. The ratio (d1/d2) of the thickness (d1) of the epoxy-resin layer (A) and the whole thickness (d2) of the sheet, is 0.15-0.9. The filler dispersion type-resin sheet further contains a hard-coat layer containing urethane resin, or a gas barrier layer. The coefficient of linear expansion of the filler dispersion type-resin sheet at 25-160degreesC, is below 5x10-5/(degreesC). The surface roughness (Ra), glass transition temperature (Tg), light transmittance and fracture strength of the sheet, is 2 nm or less, 170degreesC or more, 88% or more, and more than 40N, respectively. EXAMPLE - A polysulfite type epoxy resin (in wt.pts) (26.6) of formula 1 having epoxy equivalent 320 and viscosity 25 Pa.second at 25degreesC, 3,4-epoxy cyclohexyl methyl-3,4-epoxy cyclohexane carboxylate (26.6), methyl hexahydro phthalic anhydride (48.5) and tetra-n-butyl phosphonium o,o-diethyl phosphoro dithioate (1) were blended and mixed, to obtain an epoxy-resin liquid. Glass beads (340) having specific gravity of 2.5 g/cm3 and average particle diameter 30 microns were added to the obtained epoxy-resin liquid (840). Stirring was performed to obtain a filler-containing epoxy-resin liquid (A). On the other hand, urethane acrylate of formula 2 was suspended into toluene, to obtain 17 wt.% urethane acrylate solution (B). Using the obtained solutions (A,B), a filler dispersion type resin sheet was obtained. The obtained resin sheet had glass transition temperature of 125degreesC, light transmittance of 89%, coefficient of linear expansion of 4x10-5/degreesC and fracture strength of 150N.    R=group of formula 3.