15 April 2011 Ultra-thin-film EUV resists beyond 20nm lithography
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Abstract
Extreme ultraviolet (EUV) lithography is one of the most promising technologies for achieving 22nm HP lithography and beyond. EUV resist is required to improve resolution limit down to less than 20nm hp. To achieve such a performance, innovative materials' development is necessary under ultra-thin resist film condition for preventing line collapse. In addition, more refined etching processes compatible with ultra-thin resist film are needed. In this study, we will report our several approaches for both materials and processes towards forming less than 20nm HP pattern under ultra-thin film condition. We will also introduce our tri-layer system formed with combination of Si-ARC stack and organic hard mask (OHM) stack for refined etching process.
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Hiroki Nakagawa, Tomohisa Fujisawa, Kentaro Goto, Tooru Kimura, Toshiyuki Kai, Yoshi Hishiro, "Ultra-thin-film EUV resists beyond 20nm lithography", Proc. SPIE 7972, Advances in Resist Materials and Processing Technology XXVIII, 79721I (15 April 2011); doi: 10.1117/12.879303; https://doi.org/10.1117/12.879303
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