Inorganic hardmask development for extreme ultraviolet patterning

Anuja De Silva; Ashim Dutta; Luciana Meli; Yiping Yao; Yann Mignot; Jing Guo; Nelson M. Felix

doi:10.1117/1.JMM.18.1.011004

31 July 2018 Inorganic hardmask development for extreme ultraviolet patterning

Anuja De Silva, Ashim Dutta, Luciana Meli, Yiping Yao, Yann Mignot, Jing Guo, Nelson M. Felix

Journal of Micro/Nanolithography, MEMS, and MOEMS, Vol. 18, Issue 1, 011004 (July 2018). https://doi.org/10.1117/1.JMM.18.1.011004

Abstract

Extreme ultraviolet (EUV) patterning offers an opportunity to explore hardmask materials and patterning approaches. Traditional patterning stacks for deep ultraviolet patterning have been based on optimizing multilayer schemes for reflectivity control and pattern transfer. At the EUV wavelength, the patterning challenges are dominated by stochastics and aspect ratio control. This offers an opportunity to think differently about underlayer design for sub-36-nm pitch patterning. The choice of hardmask can be used to modulate postlitho defectivity to mitigate the stochastics effects and enable more efficient pattern transfer. Through different case studies this paper will explore a range of silicon-based inorganic hardmasks for sub-36-nm EUV patterning. How film properties dominate patterning performance will be studied systematically. The relative merits of patterning a chemically amplified organic resist directly on an inorganic hardmask or having different types of organic adhesion promoters as an intermediate layer will also be presented.

Citation Download Citation

Anuja De Silva, Ashim Dutta, Luciana Meli, Yiping Yao, Yann Mignot, Jing Guo, and Nelson M. Felix "Inorganic hardmask development for extreme ultraviolet patterning," Journal of Micro/Nanolithography, MEMS, and MOEMS 18(1), 011004 (31 July 2018). https://doi.org/10.1117/1.JMM.18.1.011004

Received: 15 May 2018; Accepted: 28 June 2018; Published: 31 July 2018

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