Patent ID: 6498067
Filing Date: 2002-12-24
Classification: H01L

Abstract:
A method of forming a composite insulator spacer on the sides of a gate structure, on a semiconductor substrate, comprising the steps of:forming a gate insulator layer on said semiconductor substrate; forming said gate structure on said gate insulator layer; depositing a first insulator layer; forming second insulator spacer shapes, from a second insulator layer, on sides of said first insulator layer, exposing the portion of said first insulator layer located on a top surface of said gate structure; removing a top portion of said second insulator spacer shapes, resulting in truncated second insulator spacer shapes now located on the sides of a bottom portion of said first insulator layer, and resulting in exposure of a top portion of the sides of said first insulator layer; creating third insulator spacer shapes, from a third insulator layer, on said top portion of the sides of said first insulator layer, and creating third insulator spacer shapes on the sides of said truncated second insulator spacer shapes; and selectively removing exposed regions of said first insulator layer.