Patent ID: 7794612

Claim:
A method of manufacturing a display substrate, comprising: forming a first metallic pattern including a gate line, a storage line and a gate electrode of a switching device on a base substrate; forming a gate insulation layer, a channel layer and a source metallic layer on the base substrate having the first metallic pattern formed thereon; patterning the source metallic layer and the channel layer to form a second metallic pattern and a channel part including a source line, a source electrode of the switching device and a drain electrode of the switching device; forming a passivation layer and a photoresist film on the second metallic pattern; patterning the photoresist film through a photolithography process to form a first pattern portion corresponding to the gate line, the source line and the switching device, and a second pattern portion formed on the storage line, a portion of the second pattern portion corresponding to a stepped portion of the storage line being thicker than a remaining portion of the second pattern portion by exposing the stepped portion and the remaining portion to different amounts of light; etching the passivation layer and the gate insulation layer using the first pattern portion and the second pattern portion; and forming a pixel electrode using the first pattern portion.