Patent ID: 8608971

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 on the first metallic pattern; forming a channel layer and a data layer on the gate insulation layer; patterning the data layer and the channel layer as to form a second metallic pattern including a data line, a source electrode, a drain electrode and a channel portion between the source and drain electrodes 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 data line and the switching device, and a second pattern portion formed on the storage line, a part of the second pattern portion being disposed on a stepped portion of the storage line, and the second pattern portion having at least three different heights from the base substrate on an upper portion of the storage line, a lower portion of the storage line, and a tilted portion defining the stepped portion, respectively, by exposing the second pattern portion to different amounts of light with a slit mask; and patterning a pixel electrode by depositing a transparent conductive material and removing the photoresist pattern with a portion of a transparent conductive material formed thereon.