Patent ID: 8183567

Claim:
A TFT for an LCD device, comprising: a semiconductor layer; a gate insulating layer on the semiconductor layer; a gate electrode directly over the semiconductor layer on the gate insulating layer; first to fourth protrusions extending from the gate electrode along an edge of the semiconductor layer; an interlayer insulating layer on the gate electrode, the interlayer insulating layer having first and second contact holes exposing the semiconductor layer; and a source electrode and a drain electrode spaced apart from the source electrode on the interlayer insulating layer, the source and drain electrodes connected to the semiconductor layer through the first and second contact holes, respectively, wherein the gate electrode has first and second sides opposite to each other, and wherein the first and second protrusions are disposed at the first side, and the third and fourth protrusions are disposed at the second side, wherein the first and second protrusions are disposed at two crossing portions of the gate electrode and the semiconductor layer, respectively, and spaced apart from each other, and the third and fourth protrusions are disposed at the other two crossing portions of the gate electrode and the semiconductor layer, respectively, and spaced apart from each other, wherein the first and second protrusions protrude toward the source electrode, and the third and fourth protrusions protrude toward the drain electrode, wherein each of the first to fourth protrusions has a triangle shape at a crossing point of the gate electrode and the semiconductor layer.