PRODUCTION OF COLOR FILTER FOR LIQUID CRYSTAL DISPLAY

摘要

PURPOSE:To form picture elements to the dimensional accuracy of micron order or below at a low cost by forming partition walls in the boundary regions of the parts intended for color filters on a transparent substrate and uniformly spreading the color ink injected into the intended parts over the entire surface thereof. CONSTITUTION:The pattern of only the partition walls 14 is formed by a lithographic method on the transparent substrate 15 and a specified amt. of lipophilic red ink 21 is injected into the parts intended for the red filters enclosed by the colorless and transparent partition walls 14. The prescribed amt. of the injected red ink 21 is then spread uniformly over the entire surface within the parts intended for the red filters. The glass substrate is held horizontal and is heated to improve the wettability with the surface of the lipophilic substrate subjected to a silane coupling treatment before the injected red ink 21 dries. The red ink 21 is thus uniformly thermally diffused over the entire surface in the parts intended for the red filters. The injection stage and thermal diffusion stage are similarly repeated to successively forms the green filters 12 and the blue filters 13.