Patent ID: 9612527
Date: 2017-04-04
CPC Classifications: G03F,H01L

Claim:
1. A method of manufacturing a semiconductor device, comprising a step of carrying out exposure and transfer of a transfer pattern to a resist film on a semiconductor wafer by setting a binary transfer mask in an exposure apparatus using exposure light of an ArF excimer laser as a light source, wherein the transfer mask comprises, on a transparent substrate, a light-shielding film having the transfer pattern, the light-shielding film has a laminated structure of a light-shielding layer and an antireflection layer and has an optical density of 2.8 or more for the exposure light, a front-surface reflectance of the light-shielding film for the exposure light is less than 50%, and a phase difference between the exposure light transmitted through the light-shielding film and the exposure light transmitted in air for a distance equal to the thickness of the light-shielding film is 30 degrees or less.