Patent ID: 6013570
Filing Date: 2000-01-11
Classification: H01L

Abstract:
A method for manufacturing a semiconductor on a semiconductor substrate, comprising the steps of:forming a gate oxide layer over the semiconductor substrate;forming a polysilicon layer over said gate oxide layer;forming a first mask layer over said polysilicon layer;forming a second mask layer over said first mask layer;patterning said second mask layer to form second gate masks;patterning said first mask layer to form first gate masks after the step of patterning said second mask layer to form second gate masks;anisotropically etching said polysilicon layer to form polysilicon gates;removing said second gate masks;isotropically etching said polysilicon gates prior to the step of removing said first gate masks;implanting shallow extension junctions with a dopant after the step of isotropically etching said polysilicon gates;removing said first gate masks;forming sidewall spacers around said polysilicon gates after the step of removing said first gate masks; andimplanting deep junctions with said dopant.