Patent ID: 8557620

Claim:
A method of manufacturing a display substrate, the method comprising: forming a gate line, a data line crossing the gate line, and a switching device on a base substrate, the switching device electrically connected to the gate line and the data line; sequentially forming a passivation layer, a first resist layer, and a second resist layer on the base substrate; patterning the second resist layer using a developing solution to form an etch-stop pattern; patterning the first resist layer using the etch-stop pattern and the developing solution to form a resist pattern, the etch-stop pattern having a sidewall protruding over a sidewall of the resist pattern; after the patterning the first resist layer, removing a portion of the passivation layer using the resist pattern and the etch-stop pattern to form a contact hole on a drain electrode of the switching device; forming a pixel electrode electrically connected to the switching device through the contact hole; and removing the first and second resist layers, wherein the first resist layer comprises a non-photosensitive resist composition, and the second resist layer comprises a photosensitive resist composition.