Patent ID: 9442374
Filing Date: 2016-09-13
CPC Classification: G02B,G03F,H01L,Y10T

Claim Text:
1. A method for manufacturing a color filter comprising: (a) forming a first colored layer including a first coloring composition; and (b) patterning the first coloring composition by dry etching to form a group of through-holes in the first colored layer including a first group of through-holes and a second group of through-holes; (c) stacking a second colored radiation sensitive layer including a second coloring radiation sensitive composition on the first colored layer so that the second coloring radiation sensitive composition is embedded inside each of the through-holes in the first group of the through-holes and the second group of the through-holes so as to form a plurality of second colored pixels; (d) removing the second colored radiation sensitive layer and a plurality of the second colored pixels formed inside each of the through-holes in the second group of the through-holes by exposing and developing a position in the second colored radiation sensitive layer, which corresponds to the first group of the through-holes formed in the first colored layer; (e) stacking a third colored radiation sensitive layer including a third coloring radiation sensitive composition on the first colored layer so that the third coloring radiation sensitive composition is embedded inside each of the through-holes in the second group of the 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 in the third colored radiation sensitive layer, which corresponds to the second group of the through-holes formed in the first colored layer, wherein the first coloring composition comprises: a colorant; and a resin, wherein the content of the colorant is 50% by mass or more based on the total solids of the first coloring composition, and the solid acid number of the resin having the highest solid acid number among all kinds of resins contained in the first coloring composition, is 80 mg KOH/g or less.