Feasibility of immersion lithography

被引:22
|
作者
Owa, S [1 ]
Nagasaka, H [1 ]
Ishii, Y [1 ]
Hirakawa, O [1 ]
Yamamoto, T [1 ]
机构
[1] Nikon Inc, Kumagaya, Saitama 3608559, Japan
来源
关键词
immersion lithography; feasibility; exposure tool; polarization; 45nm node;
D O I
10.1117/12.536852
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Feasibility of ArF (193nm) immersion lithography is reported based on our recent experimental and theoretical studies. Local fill method of water, edge shot, high NA projection optics, focus sensing, water supply, polarization effect, polarized illumination and resist are investigated. Although we recognize there are some remaining engineering risks, we have judged that ArF immersion lithography is basically feasible and is a very promising method that can reach the half pitch required for the 45nm node. On this basis we have planned our development schedule of immersion exposure tools.
引用
收藏
页码:264 / 272
页数:9
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