Patent ID: 8045078

Claim:
A method of fabricating an array substrate for a liquid crystal display device, comprising: forming a gate line, a gate electrode connected to the gate line, a gate pad at one end of the gate line on a substrate through a first mask process; forming a gate insulating layer on the gate line, the gate electrode, and the gate pad; forming a semiconductor layer on the gate insulating layer through a second mask process, the boundary of the semiconductor layer is within the gate electrode; and forming a data line crossing the gate line, a source electrode connected to the data line, a drain electrode spaced apart from the source electrode, a pixel electrode extending from the drain electrode, a gate pad terminal contacting the gate pad and a data pad terminal connected to the data line and forming a passivation pattern on the data line, the source electrode and the drain electrode through a third mask process, wherein each of the data line, the source electrode and the drain electrode has a double-layered structure of a transparent conductive material layer and an opaque conductive material layer on the transparent conductive material layer, wherein the transparent conductive material layer in the source electrode and the drain electrode is disposed between the opaque conductive material layer and the semiconductor layer.