发明名称 |
Mask blank, transfer mask, method of manufacturing a transfer mask, and method of manufacturing a semiconductor device |
摘要 |
A mask blank for use in the manufacture of a binary mask adapted to be applied with ArF excimer laser exposure light has, on a transparent substrate, a light-shielding film for forming a transfer pattern. The light-shielding film has a laminated structure of a lower layer and an upper layer and has an optical density of 2.8 or more for exposure light and a thickness of 45 nm or less. The lower layer is made of a material in which the total content of a transition metal and silicon is 90 at % or more, and has a thickness of 30 nm or more. The upper layer has a thickness of 3 nm or more and 6 nm or less. The phase difference between exposure light transmitted through the light-shielding film and exposure light transmitted in air for a distance equal to the thickness of the light-shielding film is 30 degrees or less. |
申请公布号 |
US9256122(B2) |
申请公布日期 |
2016.02.09 |
申请号 |
US201313920128 |
申请日期 |
2013.06.18 |
申请人 |
HOYA CORPORATION |
发明人 |
Kominato Atsushi;Hashimoto Masahiro;Nozawa Osamu |
分类号 |
G03F1/50;G03F1/58;H01L21/266;H01L21/268;G03F1/00;G03F7/20 |
主分类号 |
G03F1/50 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. A mask blank for use in the manufacture of a binary mask adapted to be applied with ArF excimer laser exposure light, the mask blank comprising, on a transparent substrate, a light-shielding film for forming a transfer pattern,
wherein the light-shielding film has a laminated structure of a lower layer and an upper layer and has an optical density of 2.8 or more for the exposure light, the lower layer is made of a material containing transition metal and silicon, and having a refractive index n of 1.80 or less and an extinction coefficient k of 2.37 or more, and has a thickness of 30 nm or more, the upper layer is made of a material having a refractive index n of 2.00 or more and an extinction coefficient k of 1.00 or less, and has a thickness of 3 nm or more and 6 nm or less, 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. |
地址 |
Tokyo JP |