Patent ID: 8207050

Claim:
A method for fabricating a display device comprising: forming a plurality of gate lines and data lines on a substrate, the gate and data lines crossing each other to define pixels; and forming a thin film transistor (TFT) near each crossing in the pixel including: 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 and wherein the first mask pattern with a position ‘A’, the second mask pattern with a position of ‘B’, the third mask pattern with a position of ‘C’ and the fourth mask pattern with a position of ‘D’ are formed in the first to fourth blocks, respectively, and the positions ‘A’ to ‘D’ are different from each other; and crystallizing the silicon thin film by irradiating a laser beam through the laser mask.