Patent ID: 7528023
Filing Date: 2009-05-05
Classification: B23K,C30B,G02B,H01L

Abstract:
1. An apparatus for crystallizing a semiconductor, comprising: at least one laser source; beam dividing means for dividing a laser beam emitted by the laser source into a plurality of sub-beams; at least one focussing optical system for focussing the sub-beams on a single surface of an amorphous semiconductor on a substrate; a moving mechanism for changing a distance between at least two spot positions of the sub-beams formed by the focussing optical system; first mirrors for directing the sub-beams to the focussing optical system; and second mirrors provided in the focussing optical system to receive the sub-beams reflected by the first mirrors, wherein the sub-beams between the first mirrors and the second mirrors are parallel to a direction of movement of the moving mechanism, and wherein the first mirrors respectively reflect the sub-beams so that the sub-beams are positioned at different heights from a surface of the substrate and the sub-beams are parallel to the substrate.