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23 March 2012 Line width roughness control for EUV patterning
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Controlling line width roughness (LWR) is a critical issue in extreme ultraviolet lithography (EUVL). High sensitivity, high resolution, and low LWR are required for EUV lithography resist. However, simultaneously achieving optimal properties through chemical tuning alone is difficult. The track process is one of the factors that impacts LWR. Enhancing track processes in EUV lithography is thus critical to controlling LWR. This paper describes an approach to mitigating LWR based on optimizing track-based and etch-based processes. It also presents the results of our newly developed track-based smoothing process as well as the results of combining several track-based techniques. The latest LWR performance from using track-based techniques, optimized track processes, and etch-based techniques will be highlighted.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Karen Petrillo, George Huang, Dominic Ashworth, Liping Ren, K.-Y. Cho, Stefan Wurm, Shinichiro Kawakami, Lior Huli, Shannon Dunn, and Akiteru Ko "Line width roughness control for EUV patterning", Proc. SPIE 8322, Extreme Ultraviolet (EUV) Lithography III, 83222H (23 March 2012);

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