Patent ID: 7960729
Filing Date: 2011-06-14
Classification: H01L

Abstract:
1. A method of fabricating a thin film transistor (TFT), comprising the steps of: providing a substrate, and the substrate having an insulating surface; forming an intrinsic amorphous silicon layer (intrinsic a-Si layer) on the insulating surface; forming a conductive layer on the intrinsic amorphous silicon layer, wherein a n+ a-Si junction layer is formed between the conductive layer and the intrinsic amorphous silicon layer; patterning the conductive layer to form a channel region; separating the n+ a-Si junction layer, so as to form a pair of N-I junction regions between the patterned conductive layer and the intrinsic amorphous silicon layer; treating the channel region to form an oxide layer at a sidewall of each N-I junction region by an oxygen plasma composed of pure oxygen gas or a gas mixture containing oxygen gas for about 50 seconds, so as to form the oxide layer between the insulating nitride layer and the N-I junction region in a thickness of 100 Å˜120 Å, approximately; and forming an insulating nitride layer on the channel region; wherein the oxide layer isolates the insulating nitride layer from direct contact with the N-I junction region.