Ink for black matrix and method of manufacturing substrate using the same

摘要

An ink used to form a black matrix on a substrate using an off-set printing device, wherein the off-set printing device includes a stage on which the substrate is placed, a printing roll which is covered by a blanket, and a cliché which includes a concave portion and a convex portion, the ink includes: an organic pigment; a binder; a thermally cross-linkable monomer; a printing solvent that has a boiling point equal to or more than 100 degrees Celsius; a carrier solvent that has a boiling point less than 100 degrees Celsius; and an additive.

主权项

1. A method of manufacturing a substrate for a liquid crystal display device, the method comprising:
placing a substrate on a stage of an off-set printing device, wherein the off-set printing device includes the stage, a printing roll which is covered by a blanket, and a cliché which includes a concave portion and a convex portion; coating the blanket with an ink in liquid state, thereby forming a black ink layer in gel state on the blanket; contacting the cliché and the black ink layer in gel state and transferring a portion of the black ink layer onto the cliché, thereby forming a black ink pattern on the blanket; transferring the black ink pattern onto the substrate; and performing a firing process for the substrate having the black ink pattern to harden the black ink pattern, thereby forming a black matrix having a lattice pattern that includes a plurality of openings, wherein the ink includes a carrier solvent and a printing solvent; and wherein the ink has a surface energy greater than the blanket and less than the cliché and the substrate, and a concentration of the carrier solvent in the ink is in a range of about 30 wt % to about 50 wt % and a concentration of the printing solvent in the ink is in a range of about 2 wt % to about 10 wt %.