Patent ID: 6755909
Filing Date: 2004-06-29
Classification: C30B,H01L

Abstract:
A method of crystallizing an amorphous silicon film using sequential lateral solidification that is performed using a mask having a first region with a plurality of first stripes and first slits located between the first stripes, a second region with a plurality of second stripes and second slits located between the second stripes, wherein the plurality of second stripes are perpendicular to the plurality of first stripes, a third region with a plurality of third stripes and third slits located between the third stripes, wherein the third stripes and the third slits correspond to the first slits and the first stripes, respectively, and a fourth region with a plurality of fourth stripes and fourth slits located between the fourth stripes, wherein the fourth stripes and the fourth slits correspond to the second slits and the second stripes, respectively, the method comprising:setting the mask over a substrate having an amorphous silicon film; applying a laser beam to the amorphous silicon film through the mask such that portions that correspond to the first, second, third, and fourth slits are crystallized; moving the substrate having the crystallized portions by a quarter width of the mask; and repeatedly applying a laser beam to the amorphous silicon film after moving the substrate by quarter widths of the mask.