Patent ID: 6773969
Filing Date: 2004-08-10
Classification: H01L

Abstract:
A method of forming a thin film transistor (TFT) of an organic light-emitting diode (OLED) display comprising:providing a substrate; depositing a first metal layer on the substrate; performing a first photo-etching-process (PEP) on the first metal layer to form a gate of the TFT on the substrate; sequentially forming a gate insulating (GI) layer and a first amorphous silicon layer on the gate; performing a re-crystallizing process to transfer the first amorphous silicon layer into a crystalline silicon layer; forming a second amorphous silicon layer on the gate; forming a doped n+ layer on the gate; performing a second PEP to remove portions of the n+ layer, the second amorphous silicon layer and the crystalline silicon layer; forming a second metal layer on the gate; performing a third PEP to form a source and a drain of the TFT on the substrate and to simultaneously remove portions of the n+ layer; and forming a passivation layer on the substrate.