Patent ID: 7935580

Claim:
A method of manufacturing a display substrate, comprising: forming a gate pattern on a base substrate using a first photo-resist pattern; sequentially forming a gate insulation layer, a channel layer, and a source metal layer on the base substrate having the gate pattern formed thereon; patterning the source metal layer using a second photo-resist pattern to form a source pattern; forming a protective insulation layer on the base substrate having the source pattern formed thereon; patterning the protective insulation layer and the gate insulation layer using a third photo-resist pattern to expose a portion of the base substrate; forming a color filter pattern on the exposed portion; and forming a pixel electrode on the base substrate having the color filter formed thereon, wherein patterning the protective insulation layer and the gate insulation layer using a third photo-resist pattern to expose a portion of the base substrate comprises: forming the third photo-resist pattern comprising a third portion having a first thickness and a fourth portion having a second thickness that is thinner than the first thickness, the third portion being formed on a switching element area, a gate line area, and a source line area, and the fourth portion being formed on a storage area; etching a portion of the protective insulation layer and the gate insulation layer, the etched portion not being covered by the third photo-resist pattern to expose a portion of the base substrate and an end portion of a drain electrode; removing a thickness of the third photo-resist pattern to expose the protective insulation layer corresponding to the storage area; and removing the exposed protective insulation layer corresponding to the storage area.