Patent ID: 7977217
Filing Date: 2011-07-12
Classification: H01L

Abstract:
1. A method of crystallizing silicon, comprising: preparing a substrate having an amorphous silicon film formed thereon; aligning a mask having a first energy region and a second energy region on the amorphous silicon film, wherein the first energy region includes a plurality of transmission patterns and a plurality of interception regions; irradiating a laser beam through the first and second energy regions of the mask onto a first region of the amorphous silicon film corresponding to the transmission patterns and a second region of the amorphous silicon film corresponding to the second energy regions; crystallizing the first region of the amorphous silicon film within a completely melting region by the laser beam irradiated through the first energy region of the mask and the second region of the amorphous silicon film within a near completely melting region by the laser beam irradiated through the second energy region of the mask, wherein an energy density of the near complete melting region is between an energy density of a partially melting region and an energy density of the completely melting region; moving a relative position of the mask by the length of the transmission pattern; and activating the crystallized first region by irradiating the laser beam through the second energy region to repair a defect of the crystallized first region.