Patent ID: 7863120

Claim:
A method of fabricating a liquid crystal display device, the method comprising the steps of: forming a gate electrode on a substrate; forming a gate insulating film over the gate electrode and on the substrate; forming a first semiconductor layer over the gate insulating film; forming a second semiconductor layer over the first semiconductor layer; forming a first metal layer on the second semiconductor layer and a second metal layer over the first metal layer; patterning the second metal layer by using a wet etch process; patterning the first metal layer and the second semiconductor layer in a same pattern with the patterned second metal layer by using a dry etch process by using the patterned second metal layer as a mask; forming a protective layer on the second metal layer; and forming a pixel electrode on the protective layer, wherein etched side walls of the first metal layer and the second semiconductor layer are substantially aligned with the side wall of the second metal layer.