Patent ID: 6800540
Filing Date: 2004-10-05
Classification: B23K,H01L

Abstract:
A method for crystallizing amorphous silicon, the method comprising:preparing a substrate on which an amorphous silicon layer is formed; aligning a mask above the substrate, the mask being divided into first and second blocks, the first block having a plurality of first transmission slits and a plurality of interception portions formed between the first transmission slits, the second block having a plurality of second transmission slits alternately arranged with the first transmission slits and a plurality of third transmission slits formed corresponding to middle portions of the first transmission slits; forming first crystalline regions on the amorphous silicon layer by irradiating a laser beam through the first transmission slits, each of the first crystalline regions having a crystallized region and a nucleation region; and crystallizing non-crystalline regions between the first crystalline regions and re-crystallizing the nucleation regions by moving either or both of the substrate and the mask by a distance and by irradiating a laser beam through the second and third transmission slits.