Patent ID: 6309934
Filing Date: 2001-10-30
Classification: H01L

Abstract:
A method of forming a metal-oxide-semiconductor field effect transistor having a self-aligned gate, comprising the steps of:forming a substrate comprising a silicon wafer having, an SiO.sub.2 layer deposited on said silicon wafer;applying a positive photoresist layer onto said SiO.sub.2 layer;implanting ions by focused ion beam implantation into a region of said silicon wafer through said photoresist layer and said SiO.sub.2 layer, thereby forming an exposed portion of said photoresist layer directly over said region and an unexposed region of said photoresist layer;removing only said exposed portion of said photoresist layer to provide a substrate surface including said unexposed region of said photoresist and an uncovered portion of said SiO.sub.2 layer directly beneath said removed portion of said photoresist layer;depositing a gate material over said surface of said substrate so that at least a part thereof is in physical contact with said uncovered portion of said SiO.sub.2 layer;removing said unexposed photoresist layer and any gate material deposited over said unexposed portion of said photoresist layer;forming a source and a drain on said surface;metalizing said surface having said source and drain thereon to form metal-oxide-semiconductor device.