Patent ID: 6104042
Filing Date: 2000-08-15
Classification: H01L

Abstract:
A structure of a thin film transistor (TFT), said structure comprising:a gate electrode formed on a substrate;a gate insulating layer formed on said gate electrode and said substrate for isolation;a semiconductor layer formed on said gate insulating layer;a doped semiconductor layer formed on said semiconductor layer as an ohmic contact layer; anda drain and source structure including a first conductive layer, a second conductive layer and a third conductive layer, wherein said first conductive layer is formed on said doped semiconductor layer and said gate insulating layer, said second conductive layer being on said first conductive layer and a third conductive layer being on said second conductive layer, thereby forming a multi-conductive layer structure, wherein said first conductive layer has rims uncovered by said second and third conductive layers to prevent a critical dimension loss and provide a contact structure with conducting layer formed thereafter.