UV NIL template making and imprint evaluation

Shiho Sasaki; Takaaki Hiraka; Jun Mizuochi; Akiko Fujii; Yuko Sakai; Takanori Sutou; Satoshi Yusa; Koki Kuriyama; Masashi Sakaki; Yasutaka Morikawa; Hiroshi Mohri; Naoya Hayashi

doi:10.1117/12.802746

20 October 2008 UV NIL template making and imprint evaluation

Shiho Sasaki, Takaaki Hiraka, Jun Mizuochi, Akiko Fujii, Yuko Sakai, Takanori Sutou, Satoshi Yusa, Koki Kuriyama, Masashi Sakaki, Yasutaka Morikawa, Hiroshi Mohri, Naoya Hayashi

Author Affiliations +

Proceedings Volume 7122, Photomask Technology 2008; 71223P (2008) https://doi.org/10.1117/12.802746
Event: SPIE Photomask Technology, 2008, Monterey, California, United States

Abstract

UV NIL shows excellent resolution capability with remarkable low line edge roughness, and has been attracting pioneers in the industry who were searching for the finest patterns. We have been focused on the resolution improvement in NIL template making with a 100keV acceleration voltage spot beam EB writer process, and have established a template making process to meet the requirements of the pioneers. Usually such templates needed just a small field (several hundred microns square or so). Now, for several semiconductor devices, the UV NIL is considered not only as a patterning solution for R&D purpose but eventually as a potential candidate for production, and instead of a small field, a full chip field mask is required. Although the 100kV EB writers have excellent resolution capability, they are adopting spot beams (SB) to generate the pattern and have a fatally low throughput if we need full chip writing. In this paper, we are focusing on the 50keV variable shaped beam (VSB) EB writers, which are used in current 4X photomask manufacturing. The 50keV VSB writers can generate full chip pattern in a reasonable time, and by choosing the right patterning material and process, we achieved resolution down to 28nm.

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Shiho Sasaki, Takaaki Hiraka, Jun Mizuochi, Akiko Fujii, Yuko Sakai, Takanori Sutou, Satoshi Yusa, Koki Kuriyama, Masashi Sakaki, Yasutaka Morikawa, Hiroshi Mohri, and Naoya Hayashi "UV NIL template making and imprint evaluation", Proc. SPIE 7122, Photomask Technology 2008, 71223P (20 October 2008); https://doi.org/10.1117/12.802746

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