Patent ID: 7723168

Claim:
A method of manufacturing a polycrystalline Si film, the method comprising: preparing an insulating substrate on which is formed a transistor that includes a poly-Si active layer, a gate insulating layer, and a gate, sequentially formed; forming an interconnection metal line at a distance from the gate, the top of the interconnection metal line and the top of the gate having about a same height; forming an insulating layer that covers the transistor and the interconnection metal line; forming an amorphous silicon layer on the insulating layer; and annealing the amorphous silicon layer prior to patterning, which generates seed grains expanding laterally on the transistor and the interconnection metal line by heat absorption of the gate and the interconnection metal line, and then forms a polycrystalline Si film crystallized in lateral directions on the insulating layer between the transistor and the interconnection metal line.