PURPOSE: To improve the surface smoothness, workability and thermal decomposability of a ceramic green sheet by limiting the evaporation index of an org. solvent used at the time of preparing a slurry as starting material for producing the green sheet.
CONSTITUTION: When a slurry consisting of ceramic powder, an org. binder and an org. solvent or further contg. a dispersant and a plasticizer is cast on a polymer film to produce a ceramic green sheet, the org. solvent is used so that the ratio of the evaporation index to the wt.% is regulated to ≤450. Powder of at least one among alumina, alumina-glass and zirconia is used as the ceramic powder and at least one among alcohols, ketones, aliphatic hydrocarbon, arom. hydrocarbon and acetic esters is used as the org. solvent. A ceramic green sheet having ≤0.1μm average surface roughenss (Ra) along the center line and ≤1μm max. height (Rmax) is obtd.
HATA KAZUO
AIKAWA KIICHI
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