Patent ID: 8206889
Filing Date: 2012-06-26
Classification: B82Y,G03F

Abstract:
1. A manufacturing method of a semiconductor integrated circuit device comprising the steps of: (a) preparing a semiconductor wafer having a photoresist film formed on its principal surface; (b) disposing the semiconductor wafer on a wafer stage of a projection exposure system having a reflection-type optical system; (c) supplying a reflection-type mask having a first pattern and a second pattern at a predetermined position of the projection exposure system, the first pattern being formed by a reflective layer which reflects light of a predetermined wavelength and an absorption layer which is formed on the reflective layer and absorbs the light of the predetermined wavelength, and the second pattern being formed by the reflective layer which reflects the light of the predetermined wavelength and the absorption layer which is formed on the reflective layer and absorbs the light of the predetermined wavelength; and (d) exposing the photoresist film of the semiconductor wafer to the light of the predetermined wavelength based on the first and second patterns of the reflection-type mask, wherein the absorption layer which forms the first pattern of the reflection-type mask includes: a first opening pattern which exposes the reflective layer and corresponds to the first pattern; and an auxiliary pattern which is formed in a periphery of the first opening pattern, has an opening different from the first opening pattern, and which itself is not transferred, the absorption layer which forms the second pattern of the reflection-type mask includes: a second opening pattern which exposes the reflective layer and corresponds to the second pattern; and no auxiliary pattern which is different from the second opening pattern and formed in a periphery of the second opening pattern, and the first pattern and the second pattern are patterns which are similar to each other.