Patent ID: 7205183
Filing Date: 2007-04-17
Classification: H01L

Abstract:
1. A method of manufacturing a thin film transistor, comprising: forming a semiconductor layer on a substrate; forming a gate insulating layer over an entire surface of the substrate to cover the semiconductor layer; depositing a conductive layer on the gate insulating layer; depositing a photoresist layer directly on the conductive layer, then patterning the conductive layer using the photoresist layer deposited directly on the conductive layer to form a gate electrode from a portion of the conductive layer, and then removing the photoresist layer, the gate electrode having a density of 1.5 g/cm ion-doping the impurity into the semiconductor layer using the gate electrode as a mask to form source and drain regions; wherein part of the impurity impinges directly on the portion of the conductive layer forming the gate electrode without first impinging on any other layer during the ion-doping of the impurity into the semiconductor layer; and wherein the impurity comprises hydrogen.