I think the higher laser poewr is if it's they want to do high NA.Before the recent research , I didn't know they already have a working EUV prototype in 2017.
They should have working industrial grade EUV in 2025,
From 7nm to 5nm EUV power increased.
From 5nm to 3nm even more EUV increased. Depends how much their EUV light generation module enhanced.
Its not just multipattening like DUV.
Still, there are several pieces that must come together before high-NA EUV is ready, including the scanner/source unit, masks and resists.
There are major challenges in all fronts. According to HJL Lithography, the main challenges are: 1) resists; 2) source power; 3) small depths-of-focus at 0.55 NA; 4) lens polarization control; 5) stitching issues; 6) mask making; and 7) cost.
Last edited: