Patent ID: 6922217

Claim:
An amorphous silicon thin film transistor-liquid crystal display device comprising: a substrate including a display region and a driving circuit region; first conducting patterns fanned on the substrate, the first conducting patterns including gate patterns and main wirings, the gate patterns including gate lines and gate electrodes protruding from the gate lines of driving transistor group and pixel transistor group formed in the driving circuit region and the display region, respectively, a gate insulating film formed on the substrate and the gate patterns; active layer patterns formed on the gate insulating film, the active layer patterns including amorphous silicon layer; second conducting patterns formed on the gate insulating film and the active layer patterns, the second conducting patterns including drain electrodes and source electrodes of the driving transistor group and the pixel transistor group, and branch wirings electrically connected to one of the source electrodes and the drain electrodes; a passivation layer formed on the gate insulating film and the data patterns, the passivation layer having contact holes exposing a portion of the main wirings and the branch wirings of the driving circuit region and a portion of the drain electrodes of the display region; and third conducting patterns formed on the passivation layer and including first electrodes electrically connected to one of the drain electrodes of the display region through one of the contact holes and a second electrode electrically connecting one of the main wirings to one of the branch wirings through one of the contact holes.