Patent ID: 6627387
Filing Date: 2003-09-30
Classification: G03F,Y10S

Abstract:
A method of photolithography, wherein a material layer to be patterned is provided on a substrate, the method comprising:forming an anti-reflective coating on the material layer, wherein the anti-reflective coating comprises a silicon-oxy-nitride layer; performing a nitrogen plasma treatment on the anti-reflective coating, for preventing a surface of the anti-reflective coating from being oxidized during a subsequent removal of a reworked photo-resist layer; and forming and patterning a first photo-resist layer on the anti-reflective coating, wherein portions of the treated anti-reflective coating are exposed, when the patterned first photo-resist layer needs to be reworked, performing substeps comprising; removing the patterned first photo-resist layer; forming a second photo-resist layer on the treated anti-reflective coating; patterning the second photo-resist layer to expose portions of the treated anti-reflective coating; removing portions of the treated anti-reflective coating and the material layer using the second photo-resist layer as a mask; and removing the second photo-resist layer.