Patent ID: 8551827

Claim:
A method of fabricating an organic light emitting diode display device, the method comprising: providing a substrate including a pixel part and a peripheral part; forming a buffer layer on the substrate; forming a first semiconductor layer and a second semiconductor layer on the buffer layer; forming a gate insulating layer on an entire surface of the substrate; forming gate electrodes and source/drain electrodes such that the gate electrodes and source/drain electrodes correspond to the first and second semiconductor layers, respectively; forming an insulating layer on the substrate; forming a first electrode such that the first electrode is electrically connected to the source/drain electrodes of the first semiconductor layer; forming an organic layer on the first electrode; and forming a second electrode on the organic layer; wherein: the first and second semiconductor layers are disposed on the pixel part, forming the first semiconductor layer includes crystallization by a metal catalyst, and forming the second semiconductor layer includes crystallization by solid phase crystallization.