Patent ID: 7053408

Claim:
A liquid crystal display device, comprising: a gate electrode on a substrate; a gate insulating film on the substrate and over the gate electrode; a semiconductor layer on the gate insulating film and over the gate electrode; wherein the semiconductor layer includes a -shaped channel having a width/length ratio of about 8.3 to about 25; a source electrode and a drain electrode on the semiconductor layer and adjacent the gate electrode, wherein the source electrode and the drain electrode oppose each other and each includes at least one protrusion that extends toward the opposing electrode, and the at least one protrusion of the source electrode extends directly from a data line; a protective layer on the gate insulating film and over the source and drain electrodes; and a pixel electrode on the protective layer, the pixel electrode electrically connected to the drain electrode via a contact hole; wherein an entire area of the -shaped channel is formed over the gate electrode, the gate electrode underlies a part of the data line, the source electrodes and a part of the drain electrode so that the -shaped channel is formed at parts of the source and drain electrodes facing the protrusion, the at least one protrusion of the source electrode is formed within the area of the semiconductor layer and is parallel to and offset from the at least one protrusion of the drain electrode.