Patent ID: 6100013
Filing Date: 2000-08-08
Classification: G03F,H01L

Abstract:
A method for forming a sidewall spacer on selected sidewalls of a substrate, the method comprising the steps of:a) depositing a layer of hybrid resist on said substrate;b) exposing said hybrid resist layer through a mask containing a plurality of shapes such that first portions of said hybrid resist are exposed to a first exposure level, second portions of said hybrid resist are exposed to a second exposure level, and third portions of said hybrid resist are exposed to a third exposure level, wherein said second exposure level results from diffraction effects at the edges of said plurality of shapes;c) developing said hybrid resist layer such that said second portions of said hybrid resist are removed, said removal of said second portions exposing a first region of said substrate;d) etching said first region of said substrate to form a sidewall spacer trough;e) removing said first portions of said hybrid resist and exposing a second region of said substrate while said third portions of hybrid resist remain covering a third region of said substrate;f) depositing a sidewall spacer material in said sidewall spacer trough;g) directionally etching said sidewall spacer material in said trough until said sidewall spacer material is removed from a sidewall of said second region of said substrate while said sidewall spacer material remains on a sidewall of said third region of said substrate.