Patent ID: 8633043

Claim:
A method of fabricating a fringe field switching (FFS)-liquid crystal display (LCD) device, comprising: forming a gate electrode and a gate line on a first substrate; forming a gate insulation film on the first substrate where the gate electrode and the gate line have been formed; forming an active layer and source and drain electrodes over the gate electrode and forming a data line which defines a pixel region by crossing the gate line through a single mask process; forming a pixel electrode electrically connected to the drain electrode through a single mask process, wherein the method, wherein the step of forming the active layer, the source and drain electrodes, and the pixel electrode comprises: forming, on the gate insulation film, an amorphous silicon thin film, an n+ amorphous silicon thin film and a second conductive film; forming, on the second conductive film, first to third photosensitive film pattern; selectively removing the second conductive film by using the first to third photosensitive film patterns as a mask, thereby disposing a conductive film pattern formed of the second conductive film; selectively removing the amorphous silicon thin film and the n+ amorphous silicon thin film by using the first to third photosensitive film patterns as a mask, thereby disposing an active layer and an n+ amorphous silicon thin film pattern formed of the amorphous silicon thin film and the n+ amorphous silicon thin film, below the conductive film pattern; removing the third photosensitive film pattern through an ashing process, and forming fourth and fifth photosensitive film patterns having a thickness removed by a thickness of the third photosensitive film pattern; selectively removing the conductive film pattern by using the fourth and fifth photosensitive film patterns as a mask, thereby disposing source and drain electrodes formed of the second conductive film on the n+ amorphous silicon thin film pattern; removing the fourth and fifth photosensitive film patterns; forming a third conductive film on an entire surface of the first substrate; forming a photosensitive film pattern on the third conductive film; and selectively removing the third conductive film by using the photosensitive film pattern as a mask, thereby disposing a pixel electrode directly electrically connected to the drain electrode and formed of the third conductive film; forming a passivation film on the first substrate where the pixel electrode has been formed; forming a common electrode formed in a single pattern over a pixel portion, and configured to generate a fringe field with a plurality of slits in each pixel region together with the pixel electrode; and bonding the first substrate to a second substrate, wherein an ohmic-contact layer is formed between the active layer and the source and drain electrodes by performing a back channel etching after the pixel electrode has been formed.