Patent ID: 6632744
Filing Date: 2003-10-14
Classification: G03F,H01L

Abstract:
A manufacturing method of a semiconductor integrated circuit device comprising the steps of:(a) depositing a positive type photoresist film on a semiconductor substrate; (b) exposing a first mask pattern on said positive type photoresist film; (c) exposing a second mask pattern on said positive type photoresist film so as to be superposed on said first mask pattern; (d) performing development treatment relative to said positive type resist film after said steps (b) and (c) and thereby forming a photoresist pattern comprising a positive type photoresist pattern on said semiconductor substrate; and (e) performing etching treatment relative to said semiconductor substrate by using said photoresist pattern as a mask and thereby transferring a transferred pattern on said semiconductor substrate, wherein said first mask pattern has a pattern for transferring a line pattern; and wherein said second mask pattern has a plurality of unit cells arranged regularly; and wherein said second mask pattern has: a plurality of main light transferring patterns for separating said line pattern; a plurality of auxiliary light transferring patterns disposed such that a distance between each of said main light transferring patterns and each of said auxiliary light transferring patterns becomes the same in a periphery thereof, and formed at such a dimension as not to be transferred on said positive type photoresist film; and a phase shifter disposed in any one of said main light transferring patterns and said auxiliary light transferring patterns and generating a phase difference in a transferring light.