Patent ID: 7474362

Claim:
A method of fabricating a liquid crystal display device, comprising: providing a substrate having a first region and a second region; forming active patterns in the first and second regions; forming a first insulating film on the substrate; forming a first gate electrode of a first conductive material on the active patterns; forming a conductive layer of the second conductive material on the substrate; forming a first photosensitive film on the conductive layer; forming a first photosensitive film pattern by patterning the first photosensitive film to surround portions having the first gate electrode of the first region and forming a second photosensitive film pattern to shield an entire portion of the second region; forming a second gate electrode on the first gate electrode of the first region by patterning the conductive layer using the photosensitive film patterns as a mask; forming source and drain regions of N type on the active pattern of the first region by doping n+ impurity ions on the substrate using the first and second photosensitive film patterns as a mask; forming a second photosensitive film on the substrate; forming a third photosensitive film pattern having a first thickness on the first region, a fourth photosensitive film pattern having the first thickness on the first gate electrode of the second region, and a fifth photosensitive film pattern having a second thickness on the side of the first gate electrode of the second region using a mask having a diffraction pattern; forming a second gate electrode on the first gate electrode of the second region by patterning the conductive layer using the third, fourth and fifth photosensitive film patterns as a mask; removing the fifth photosensitive film pattern; forming source and drain regions of P type on the active pattern of the second region by doping p+ impurity ions on the substrate using the third and fourth photosensitive film patterns as a mask; forming a second insulating film on the substrate; and forming N type source and drain electrodes electrically connected to the N type source and drain regions in the first region and P type source and drain electrodes electrically connected to the P type source and drain regions in the second region.