Patent ID: 6043113
Filing Date: 2000-03-28
Classification: H01L

Abstract:
A method of forming a self-aligned thin film transistor comprising the steps of:depositing a gate electrode on a surface of a glass substrate and covering said surface and gate electrode with a gate insulating layer;depositing a channel layer formed of compound semiconductor material on said gate insulating layer, said channel layer being positioned over and extending beyond said gate electrode;depositing a shield on a portion of said channel layer aligned with and overlying said gate electrode;subjecting the structure to a reagent selected to react with said semiconductor material causing removal of a component thereof, said reagent reacting with the portions of said channel layer not covered by said shield to form doped source and drain regions extending to the edges of said gate electrode and positioned on opposite sides of a channel; andforming source and drain electrodes in contact with said respective source and drain regions.