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Proceedings Paper

Inactivation technology for pitch doubling lithography
Author(s): Jun Hatakeyama; Masaki Ohashi; Youichi Ohsawa; Kazuhiro Katayama; Yoshio Kawai
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Paper Abstract

We propose novel inactivation technologies which improve resolution. Base generators have been developed, which inactivate acid by thermal treatment or exposure. This thermal inactivation technology realizes simple litho-inactivation-litho-etch (LILE) process with good fidelity. After 1st patterning, acid is inactivated by amine released from the thermal base generator under low temperature baking of less than 150°C. Just adding one simple low temperature bake process, LILE has two advantages; i) keeping high throughput, and ii) avoidance of pattern deformation. 32nm line and space (l&s) pattern is successfully delineated. The inactivation technology has been expanded to frequency doubling patterning. Photo base generator (PBG) is used to inactivate acid generated by exposure. Acid concentration in both of low and high exposed area is precisely controlled by base generation efficiency of PBG. The dual tone resist successfully delineates 32.5nm l&s pattern using 65nm l&s mask patterns with single exposure.

Paper Details

Date Published: 25 March 2010
PDF: 11 pages
Proc. SPIE 7639, Advances in Resist Materials and Processing Technology XXVII, 76392U (25 March 2010); doi: 10.1117/12.849211
Show Author Affiliations
Jun Hatakeyama, Shin-Etsu Chemical Co., Ltd. (Japan)
Masaki Ohashi, Shin-Etsu Chemical Co., Ltd. (Japan)
Youichi Ohsawa, Shin-Etsu Chemical Co., Ltd. (Japan)
Kazuhiro Katayama, Shin-Etsu Chemical Co., Ltd. (Japan)
Yoshio Kawai, Shin-Etsu Chemical Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 7639:
Advances in Resist Materials and Processing Technology XXVII
Robert D. Allen, Editor(s)

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