Patent ID: 8587740

Claim:
A method of manufacturing a display substrate, the method comprising: forming a switching member including a gate line, a data line crossing the gate line, and a TFT electrically connected to the gate line and the data line on an insulation substrate; forming a color filter layer on the switching member; forming an inorganic insulation layer on the color filter layer, the inorganic insulation layer having a hole extending therethrough and exposing a top surface portion of a color filter of the color filter layer; and forming a pixel electrode on the inorganic insulation layer, wherein the hole is positioned over a channel portion of the TFT, wherein the forming of the switching member comprises: forming a first metal pattern including the gate line, a gate electrode of the TFT, and a storage electrode on the insulation substrate; forming a gate insulation layer on the insulation substrate having the metal pattern formed thereon; forming a second metal pattern including the data line, and source and drain electrodes of the TFT on the gate insulation layer; and forming a protective layer on the insulation substrate having the second metal pattern formed thereon, wherein the forming of the color filter layer comprises: forming a red color filter, a green color filter and a blue color filter on the switching member; and forming a storage hole and a first contact hole on each of the red, green and blue color filters, the storage hole exposing a portion of the switching member in correspondence with the storage electrode, and the first contact hole exposing a portion of the switching member in correspondence with the drain electrode, wherein the forming of the inorganic insulation layer comprises: forming an inorganic material on the color filter layer having the storage hole and the first contact hole formed thereon; forming a hole and a second contact hole by patterning the inorganic insulation material, the hole exposing a portion of the color filter layer in correspondence with the TFT, and the second contact hole exposing a portion of the switching member in correspondence with the drain electrode; and forming a third contact hole that exposes a portion of the drain electrode through the protective layer.