Patent ID: 7550327

Claim:
A fabricating method of a thin film transistor substrate, comprising: forming a gate line on a substrate; forming a data line which crosses the gate line with a gate insulating film therebetween, wherein the crossing of the data and gate lines form pixel regions; forming a thin film transistor at a crossing part of the gate line and the data line; forming a passivation film on the gate insulating film; after forming the passivation film, forming a first photo-resist pattern in the pixel regions; depositing a transparent conductive film on an entire surface of the passivation film; after the depositing of the transparent conductive film, forming a second photo-resist pattern that exposes the transparent conductive film formed in an area other than the area where the first photo-resist pattern is formed in the pixel region; and removing the first and second photo-resist patterns which remain on the passivation film after etching the transparent conductive film which is exposed by the second photo-resist pattern, wherein forming the second photo-resist pattern comprises, forming a photo-resist on the entire surface of the passivation film after forming the transparent conductive film on the passivation film where the first photo-resist pattern is formed; and ashing the photo-resist to expose the transparent conductive film formed in an area other than the passivation film area where the contact hole and the pixel electrode are to be formed, and wherein performing a heat treatment to polymerize the transparent conductive film covered by the second photo-resist pattern after forming the photo resist on the entire surface of the passivation film.