Patent ID: 7820466

Claim:
A method of manufacturing a flat panel display device, the method comprising: forming a semiconductor layer including amorphous silicon on a substrate having a pixel area and a peripheral circuit area surrounding the pixel area; first crystallizing the semiconductor layer formed on the peripheral circuit area through a sequential lateral solidification (SLS) process; second crystallizing the semiconductor layer formed on the peripheral circuit area and the pixel area through a solid phase crystallization (SPC) process; forming a circuit thin film transistor (TFT) including the semiconductor layer crystallized by the first crystallizing and second crystallizing, wherein the circuit TFT is formed in the peripheral circuit area; forming a pixel TFT including the semiconductor layer crystallized by the second crystallizing, wherein the pixel TFT is formed in the pixel area; and forming a first electrode connected to the pixel TFT, wherein first crystallizing and second crystallizing are performed successively with each other.