Patent ID: 7927936
Filing Date: 2011-04-19
Classification: B23K,H01L

Abstract:
1. A crystallization method comprising: providing a substrate having a silicon thin film; positioning a laser mask having first to fourth blocks on the substrate, each block having a periodic pattern including a plurality of transmitting regions and a blocking region, wherein the laser mask includes a first mask pattern in the first block, a second mask pattern in the second block, a third mask pattern in the third block and a fourth mask pattern in the fourth block, each first to fourth blocks having a periodic pattern including a plurality of transmitting regions and a blocking region; irradiating a first laser on a certain region of the silicon thin film through the laser mask; moving the laser mask or a stage having the substrate in a direction of an X axis and irradiating a second laser through the laser mask; moving the laser mask or the stage in the direction of the X axis and irradiating a third laser through the laser mask; and moving the laser mask or the stage in the direction of the X axis and irradiating a fourth laser through the laser mask.