Liquid crystal display device having polycrystalline silicon thin film transistor and method of fabricating the same

摘要

A method of fabricating an array substrate for a liquid crystal display device includes forming an alignment key on a substrate having a display region and a non-display region surrounding the display region; forming an amorphous silicon layer on the alignment key; crystallizing a predetermined portion of the amorphous silicon layer using the alignment key as a reference; patterning the amorphous silicon layer using the alignment key as a reference to form a polycrystalline silicon layer, the polycrystalline silicon layer being formed from the predetermined portion of the amorphous silicon layer; forming a gate insulating layer on the semiconductor layer; forming a gate electrode on the gate insulating layer using the alignment key as a reference; forming an interlayer insulating layer on the gate electrode; and forming source and drain electrodes on the interlayer insulating layer.