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- W2045380027 abstract "Extreme ultraviolet lithography (EUVL) has been developed and studied for a sub-22 nm semiconductor device. It is difficult to obtain a smooth sub-22 nm pattern because line edge roughness (LER) and linewidth roughness (LWR) cannot be controlled well. According to the 2008 ITRS roadmap, LER has to be below 1.3 nm to achieve a 22 nm node for EUVL. In our previous work, the resist reflow process (RRP), in which the resist is baked above the glass transition temperature ( T g ), was very helpful for reducing LER and LWR for EUVL. LER and LWR could be decreased from ∼6 to ∼1 nm. As RRP time progresses, however, the critical dimension could become wider because the developed resist can flow more easily when the temperature is above T g . Therefore, another method is suggested to solve this problem. The developed resist, which is intentionally designed with a 1:3 line and space (L/S) (11:33 nm) pattern, is baked above T g . As a result, LER and LWR can be smoothed by RRP and we could achieve a 22 nm 1:1 L/S pattern with a small LER." @default.
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- W2045380027 date "2010-03-01" @default.
- W2045380027 modified "2023-10-18" @default.
- W2045380027 title "Line Edge Roughness Reduction Using Resist Reflow Process for 22 nm Node Extreme Ultraviolet Lithography" @default.
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- W2045380027 doi "https://doi.org/10.1143/jjap.49.036502" @default.
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