Patent ID: 9513414
Filing Date: 2016-12-06
CPC Classification: G02B,G02F,H01L

Claim Text:
1. A method for repairing a display substrate, comprising steps of: forming a black matrix pattern on a substrate, wherein there is a first pattern missed region in the formed black matrix pattern; detecting and marking the first pattern missed region and the position thereof in the black matrix pattern before the step of forming a color filter layer pattern on the substrate on which the black matrix pattern is formed; forming a color filter layer pattern on the substrate on which the black matrix pattern is formed; removing all patterns provided only within the first pattern missed region from the substrate by laser processing the first pattern missed region of the substrate based on a position of the first pattern missed region; and filling a first repair material only within the first pattern missed region of the substrate processed by laser so as to repair the first pattern missed region, wherein there is a first pattern redundant region in the formed black matrix pattern, and the method further comprising steps of: detecting and marking the first pattern redundant region and the position thereof in the black matrix pattern before the step of forming a color filter layer pattern on the substrate on which the black matrix pattern is formed; and removing all patterns provided within the first pattern redundant region from the substrate by laser processing the first pattern redundant region of the substrate based on a position of the first pattern redundant region, wherein the step of detecting and marking the first pattern missed region and the position thereof, and the step of detecting and marking the first pattern redundant region and the position thereof are simultaneously performed in one detection process, wherein the first pattern missed region includes a white defect region where at least part of the black matrix pattern is expected to be formed but is absent, and wherein the first repair material is filled only in an area surrounded by a boundary of the white defect region, wherein the first repair material filled in the first pattern missed region has a thickness equal to that of the black matrix pattern, wherein the first repair material filled in the first pattern missed region has an even thickness within the whole first pattern missed region, so that the repaired black matrix pattern has a flat surface.