Patent ID: 7316784

Claim:
A method of fabricating a thin film transistor substrate for a display device, comprising: a first step of forming a gate line on a substrate; a second step of forming a gate insulating film covering the gate line; a third step of forming a semiconductor layer at a desired area on the gate insulating film; a fourth step of forming a data line crossing the gate line, a source electrode connected to the data line and a drain electrode opposed to the source electrode on the gate insulating film; a fifth step of forming a protective film in such a manner to cover the gate line, the data line, the source electrode and the drain electrode; and a sixth step of forming a pixel electrode making an interface with the protective film at the remaining area excluding an area where the protective film is formed and connected to a side surface of the drain electrode; wherein said protective film is any one of an organic insulating film, an inorganic insulating film and an inorganic/organic insulating film having a double-layer structure, and wherein said sixth step includes: coating a transparent conductive film formed into an amorphous substance on the protective film including an organic material while being formed into a crystalline substance at the remaining area formed from an inorganic material; and selectively etching the amorphous transparent conductive film on the protective film using an etchant for amorphous substance to thereby leave only the crystalline transparent conductive film.