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Proceedings Paper

Improvement study of Mitsui SOC materials for multilayer lithography process
Author(s): Keisuke Kawashima; Koji Inoue; Kenichi Fujii; Takashi Oda; Kazuo Kohmura
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Paper Abstract

In this report, we will describe the progress of our new SOC material development for the underlayer. In the advanced patterning technology such as EUV lithography, the etching resistance and the adhesive property with a middle layer will be key requirements as well as the planarization. We designed new polymers for SOC material that were improved the etching resistance toward next generation patterning technology on the basis of Ohnishi parameter as a guideline of the polymer design. The etching resistance of our newly developed polymers were about 1.7 times and 1.5 times stronger than the polymer A we reported previously and the PHS or novolac. The adhesive property was evaluated by measuring water contact angle and the water contact angle of our newly developed polymers were similar to the novolac. This result indicated that the developed polymer showed similar hydrophilicity to the novolac with keeping higher O2 etching resistance than novolac.

Paper Details

Date Published: 27 June 2019
PDF: 7 pages
Proc. SPIE 11178, Photomask Japan 2019: XXVI Symposium on Photomask and Next-Generation Lithography Mask Technology, 1117804 (27 June 2019); doi: 10.1117/12.2538082
Show Author Affiliations
Keisuke Kawashima, Mitsui Chemicals, Inc. (Japan)
Koji Inoue, Mitsui Chemicals, Inc. (Japan)
Kenichi Fujii, Mitsui Chemicals, Inc. (Japan)
Takashi Oda, Mitsui Chemicals, Inc. (Japan)
Kazuo Kohmura, Mitsui Chemicals, Inc. (Japan)

Published in SPIE Proceedings Vol. 11178:
Photomask Japan 2019: XXVI Symposium on Photomask and Next-Generation Lithography Mask Technology
Akihiko Ando, Editor(s)

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