Patent ID: 6632592
Filing Date: 2003-10-14
Classification: G03F

Abstract:
A method for forming a resist pattern by exposing, to continual gate patterns inside and outside an active area, a resist film formed on a wafer having said active area pattern on a major surface, using a projection exposure apparatus, comprising:resizing a pattern equivalent to an active area on said wafer; inverting said resized pattern; obtaining a logical product of said resized pattern and a gate pattern to be exposed; forming a first mask having a pattern equivalent to a logical sum of said inverted pattern formed in said inverting said resized pattern and said logical product pattern formed in said obtaining the logical product; forming a second mask having a pattern equivalent to a logical sum of said pattern resized in said resizing the pattern and said gate pattern to be exposed; exposing said resist film on said wafer using said first mask formed in said forming the first mask under a condition that said projection exposure apparatus has a first numerical aperture; and exposing said resist film on said wafer using said second mask formed in said forming the second mask under a condition that said projection exposure apparatus has a second numerical aperture larger than the first numerical aperture.