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Proceedings Paper

Impact of surface treatment on resist reflow process
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Paper Abstract

Resist reflow techniques have widely been adopted for lithography in resolution limited region. During the reflow process, resist patterns are heated over its glass temperature through number of temperature steps. Early works have focused how the temperature steps during heat-up process can be effectively controlled for critical dimension (CD) and the pattern profile after reflow. However, for a specific application that needs moderate CD and profile change, adjusting heat-up parameters would not be sufficient to achieve good CD and profile control and additional relevant parameters should be accounted. In this paper, we count surface treatment condition on reflow process as an additional control parameter. We measured CDs with varying surface treatment parameters of substrate on square arrays of resist islands with 300 nm island-to-island gap space. We found that the amount of after develop CD to after reflow CD bias decreases as contact angles of substrates increases. In conclusion, we prove the resist reflow CD can be controlled precisely by adjusting the substrate coverage of hydroxyl groups during adhesion treatments in addition to the temperatures for the resist reflow process.

Paper Details

Date Published: 4 April 2008
PDF: 6 pages
Proc. SPIE 6923, Advances in Resist Materials and Processing Technology XXV, 69233K (4 April 2008); doi: 10.1117/12.772534
Show Author Affiliations
Young-Je Yun, Dongbu HiTek (South Korea)
Jin-Ho Park, Dongbu HiTek (South Korea)
Hakyu Choi, Dongbu HiTek (South Korea)
Seung Ryong Park, Dongbu HiTek (South Korea)
Kwangseon Choi, Dongbu HiTek (South Korea)
Jea-Hee Kim, Dongbu HiTek (South Korea)
Jae-Won Han, Dongbu HiTek (South Korea)

Published in SPIE Proceedings Vol. 6923:
Advances in Resist Materials and Processing Technology XXV
Clifford L. Henderson, Editor(s)

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