Patent ID: 7541230
Filing Date: 2009-06-02
Classification: B23K,C30B,G02B,H01L

Abstract:
1. A method of crystallizing a semiconductor, comprising the steps of: dividing a laser beam emitted by a laser source into a plurality of sub-beams; and irradiating the sub-beams onto an amorphous semiconductor on a substrate to crystallize the semiconductor; wherein laser beams emitted by the laser source inducing the sub-beams are simultaneously and selectively irradiated into a single surface of the semiconductor to form separate beam spots, wherein the sub-beams are irradiated to scan in a first direction in a surface of the substrate; wherein the sub-beams are positioned in the surface of the substrate and in a second direction perpendicular to the first direction, and wherein the sub-beams reciprocally scan in the first direction, and a scan position is shifted in the second direction for each scan, wherein the scan position is shifted in the second direction, by a smaller distance than intervals between the sub-beams positioned in the second direction.