Patent ID: 6183938
Filing Date: 2001-02-06
Classification: G03F,H01L

Abstract:
A method of making a sub-lithographic structure comprising:providing a nitrogen rich film over a portion of a substrate;depositing a photoresist over the nitrogen rich film and the substrate, wherein the photoresist and the nitrogen rich film interact and form a thin desensitized resist layer around an interface between the photoresist and the nitrogen rich film, wherein the thin desensitized resist layer comprises a first, vertical portion and a second, horizontal portion;exposing the photoresist to radiation;developing the photoresist exposing the thin desensitized resist layer;directionally etching the second portion of the thin desensitized resist layer, leaving the first portion of the thin desensitized resist layer, thereby forming the sub-lithographic structure; andremoving the nitrogen rich film leaving the sub-lithographic structure on the substrate.