Patent ID: 7906781

Claim:
An liquid crystal display (LCD) device comprising: an active pattern formed of a silicon layer on a substrate, and having a source region, a drain region and a channel region; a data line including a first data line pattern formed of the silicon layer and a second data line pattern formed of a conductive metal layer, wherein the second data line pattern having the same form as the first data line pattern is formed on a top surface of the first data line pattern; a first insulation film formed on a portion of the substrate, wherein the first insulation film contacts with sides of the first data line pattern, sides of the second data line pattern and a top surface of the second data line pattern; a second insulation film formed on the substrate; a gate electrode formed on a portion of the active pattern where the second insulation film is formed; a third insulation film on a portion of the substrate; a plurality of first contact holes defined through the second and third insulation films to expose a portion of the source and drain regions; a second contact hole defined through the first, second and third insulation films to expose a portion of the top surface of the second data line pattern; a source electrode connected to the source region within one of the plurality of first contact holes and the data line within the second contact hole; and a drain electrode connected to the drain region within another one of plurality of first contact holes.