Patent ID: 7732268

Claim:
A method of manufacturing a display device, the method comprising; a first step of depositing a hydrogenated amorphous silicon on a substrate and a second step of dehydrogenating a predetermined region of the hydrogenated amorphous silicon and then melting and crystallizing the amorphous silicon in a dehydrogenated region into polycrystal silicon, a step of forming a plurality of pixels having TFT devices using an amorphous silicon in a display region of the substrate, and forming a driving circuit having a plurality of semiconductor devices using the polycrystal silicon to the outside of the display region, wherein in the second step, a first continuous oscillation laser is irradiated only to the region of forming the driving circuit and the peripheral region thereof at the outside of the display region of the substrate to conduct dehydrogenation, and a second continuous oscillation laser is irradiated only to the dehydrogenated region to transform the amorphous silicon into the polycrystal silicon; and the region to which the first continuous oscillation laser is irradiated is wider than the region to which the second continuous oscillation laser is irradiated.