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Proceedings Paper

Design and development of next-generation bottom anti-reflective coatings for 45nm process with hyper NA lithography
Author(s): Makoto Nakajima; Takahiro Sakaguchi; Keisuke Hashimoto; Rikimaru Sakamoto; Takahiro Kishioka; Satoshi Takei; Tomoyuki Enomoto; Yasuyuki Nakajima
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Paper Abstract

Integrated circuit manufacturers are consistently seeking to minimize device feature dimensions in order to reduce chip size and increase integration level. Feature sizes on chips are achieved sub 65nm with the advanced 193nm microlithography process. R&D activities of 45nm process have been started so far, and 193nm lithography is used for this technology. The key parameters for this lithography process are NA of exposure tool, resolution capability of resist, and reflectivity control with bottom anti-reflective coating (BARC). In the point of etching process, single-layer resist process can't be applied because resist thickness is too thin for getting suitable aspect ratio. Therefore, it is necessary to design novel BARC system and develop hard mask materials having high etching selectivity. This system and these materials can be used for 45nm generation lithography. Nissan Chemical Industries, Ltd. and Brewer Science, Inc. have been designed and developed the advanced BARCs for the above propose. In order to satisfy our target, we have developed novel BARC and hard mask materials. We investigated the multi-layer resist process stacked 4 layers (resist / thin BARC / silicon-contained BARC (Si-ARC) / spin on carbon hard mask (SOC)) (4 layers process). 4 layers process showed the excellent lithographic performance and pattern transfer performance. In this paper, we will discuss the detail of our approach and materials for 4 layers process.

Paper Details

Date Published: 11 April 2006
PDF: 8 pages
Proc. SPIE 6153, Advances in Resist Technology and Processing XXIII, 61532L (11 April 2006); doi: 10.1117/12.656132
Show Author Affiliations
Makoto Nakajima, Nissan Chemical Industries, Ltd. (Japan)
Takahiro Sakaguchi, Nissan Chemical Industries, Ltd. (Japan)
Keisuke Hashimoto, Nissan Chemical Industries, Ltd. (Japan)
Rikimaru Sakamoto, Nissan Chemical Industries, Ltd. (Japan)
Takahiro Kishioka, Nissan Chemical Industries, Ltd. (Japan)
Satoshi Takei, Nissan Chemical Industries, Ltd. (Japan)
Tomoyuki Enomoto, Nissan Chemical Industries, Ltd. (Japan)
Yasuyuki Nakajima, Nissan Chemical Industries, Ltd. (Japan)

Published in SPIE Proceedings Vol. 6153:
Advances in Resist Technology and Processing XXIII
Qinghuang Lin, Editor(s)

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