Manufacturing method of color filter substrate
A manufacturing method of a color filter substrate includes forming a black matrix on a substrate, the black matrix including first, second, third and fourth openings, forming first, second and third color filter patterns in the first, second and third openings, forming an overcoat layer on the substrate, disposing a soft mold on the organic material layer, the soft mold including first depressed portions and a second depressed portion, the first depressed portions corresponding to the black matrix, and the second depressed portion corresponding to the fourth opening, wherein a first depth of the first depressed portions is larger than a second depth of the second depressed portion, applying pressure to the soft mold such that the first and second depressed portions are filled with the overcoat layer, first curing the overcoat layer, detaching the soft mold from the overcoat layer, and second curing the overcoat layer.
1. A soft mold for manufacturing a color filter substrate, which includes a black matrix and first, second, third and fourth color filter patterns, comprising:
first depressed portions in locations corresponding to the black matrix and having a first depth, the first depressed portions including first to fourth sub-depressed portions; and
a second depressed portion between the first and second sub-depressed portions of the first depressed portions in a location corresponding to the fourth color filter pattern and having a second depth and substantially flat surfaces between the second and third sub-depressed portions of the first depressed portions and the third to fourth sub-depressed portions of the first depressed portions,
wherein the first depth is larger than the second depth,
wherein a width of each first depressed portion is smaller than a width of the second depressed portion,
wherein the second depressed portion is spaced apart from the first depressed portions, and
wherein a group of the first to fourth sub-depressed portions of the first depressed portions and the second depressed portion between the first and second sub-depressed portions is sequentially and repeatedly arranged on a surface of the soft mold.
2. The soft mold according to claim 1 , wherein the color filter substrate further includes patterned spacers over the black matrix, and the first depressed portions correspond to the patterned spacers.
3. The soft mold according to claim 2 , wherein the patterned spacers have a height smaller than the first depth.
4. The soft mold according to claim 3 , wherein the height of the patterned spacers is within a range of 2 μm to 4 μm.
5. The soft mold according to claim 2 , wherein the first, second, third and fourth color filter patterns correspond to red, green, blue and white color filter patterns, respectively.
6. The soft mold according to claim 5 , wherein the patterned spacers and the white color filter pattern are formed of the same material in the same process.
7. The soft mold according to claim 1 , wherein the second depressed portion is disposed directly in an area where a white color filter pattern is formed.