Patent ID: 6736895
Filing Date: 2004-05-18
Classification: C30B,H01L

Abstract:
A method of crystallizing an amorphous silicon film, comprising;locating a substrate having an amorphous silicon film in a sequential lateral solidification (SLS) apparatus; irradiating the amorphous silicon film in a first irradiated region using a laser beam that passes through a mask, wherein the mask includes a light absorptive portion for blocking a laser beam and a plurality of stripe-shaped light transmitting portions for passing the laser beam, wherein each light-transmitting portion includes triangular-shaped edges on both sides, and wherein laterally growing grains are formed by growing laterally from an interface between liquid silicon and solid silicon; moving the mask in an X-axial direction by a distance less than the length of the light transmitting portions to overlap the previously crystallized grain regions; and performing a second crystallization such that laterally growing grains grow in a second irradiated region.