Patent ID: 6096657
Filing Date: 2000-08-01
Classification: H01L

Abstract:
A method for forming a spacer on a substrate comprising at least a first region and a second region, said first region being uncovered, said second region comprising at least one layer, said method comprising the steps of:a) forming a first and a second insulating layer on said first and said second region;b) forming a polysilicon layer on said first and said second insulating layer;c) anisotropically dry etching said polysilicon layer using said second insulating layer as an etch stop layer to thereby form at least one polysilicon spacer on said first region adjacent to said second region;d) anisotropically dry etching said second insulating layer, using said polysilicon spacer as a mask and said first insulating layer as an etch stop layer; ande) removing said polysilicon spacer in at least one dry etching step.