Patent ID: 7336324

Claim:
An array substrate for a liquid crystal display device, comprising: a gate pattern on a substrate, the gate pattern including a gate electrode and a gate line; a gate insulating layer on the gate pattern; a semiconductor layer on the gate insulating layer; a data pattern over the semiconductor layer, the data pattern including source and drain electrodes, and a data line; a passivation layer on the data pattern; and a pixel electrode connected to the drain electrode and located on the passivation layer, wherein at least one of the gate pattern and the data pattern includes a first metal layer of molybdenum (Mo)-titanium (Ti) alloy and a second metal layer of one of copper (Cu), aluminum (Al), silver (Ag) and gold (Au) on the first metal layer, wherein the second metal layer is substantially covered by a diffusion layer which has Ti of the first metal layer.