Patent ID: 9507257
Filing Date: 2016-11-29
CPC Classification: G02B,G03F,H01L

Claim Text:
1. A method for manufacturing a color filter, comprising: (a) forming a first colored layer including a first coloring composition to form a plurality of first colored pixels; (b) patterning the first colored layer by a dry etching to form a plurality of first through-holes in the first colored layer; (c) stacking a second colored layer including a second coloring composition on the first colored layer so that the second coloring composition is embedded inside each of the first through-holes so as to form a plurality of second colored pixels; (d) patterning the second colored layer by dry etching so that a plurality of second through-holes apart from the first through-holes are formed on the first colored layer to form the plurality of first colored pixels; (d′) performing a planarization treatment on the second colored layer until at least the first colored layer is exposed; (e) stacking a third colored radiation sensitive layer including the third coloring radiation sensitive composition on the first colored layer so that the third coloring radiation sensitive composition is embedded inside each of the second through-holes so as to form a plurality of third colored pixels; and (f) removing the third colored radiation sensitive layer by exposing and developing a position of the third colored radiation sensitive layer which corresponds to the second through-holes formed in the first colored layer, wherein the process (d′) is performed after the process (c) and before the process (d), or after the process (d) and before the process (e), the first coloring composition contains a colorant and a resin, a content of the colorant is 60% by mass or more based on total solids of the first coloring composition, and an solid acid number of a resin having the highest solid acid number is 80 mg KOH/g or less, and the third colored radiation sensitive layer contains a photopolymerization initiator and a polymerizable compound.