Patent ID: 6103608
Filing Date: 2000-08-15
Classification: H01L

Abstract:
A method of forming a contact window on a substrate, said method comprising the steps of:forming a gate structure on said substrate, said gate structure having a gate oxide, a gate electrode formed above said gate oxide, and a gate electrode protection layer formed above said gate electrode;forming a protection layer conforming with said substrate and said gate structure;forming a first insulation layer on said protection layer;removing a portion of said first insulation layer and a portion of said protection layer for forming side wall spacers on side walls of said gate structure;performing an ion implantation of impurities to said substrate, using said gate structure and said side wall spacers as a mask;removing said side wall spacers;forming a second insulation layer on said substrate, said side wall spacers, and said gate structure;patterning a photoresist layer on said second insulation layer to expose a portion of second insulation layer for making a connection; andremoving a portion of said second insulation layer using said photoresist layer as a mask for forming a contact window.