Patent ID: 8835801

Claim:
A method for manufacturing a display device comprising: forming a first plurality of active layers in a first device formation region and a second plurality of active layers in a second device formation region, wherein the first device formation region and the second device formation region are located next to each other over a substrate; scanning the first plurality of active layers with a laser beam elongated in one direction and having a first end and a second end opposite the first end along the one direction on an irradiation surface in a first direction, wherein both ends of the laser beam are located outside the first device formation region and the second device formation region; scanning the second plurality of active layers with the laser beam in a second direction, wherein the both ends of the laser beam are located outside the second device formation region and the first device formation region, and wherein the second direction is opposite to the first direction; and dividing the substrate into a first sub-substrate including the first device formation region and into a second sub-substrate including the second device formation region, wherein each length of the first sub-substrate and the second sub-substrate is shorter than a length between the both ends of the laser beam.