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Proceedings Paper

Stress relaxation of EB resist for x-ray mask fabrication
Author(s): Atsuko Sasahara; Teruhiko Kumada; Koji Kise; Hiroaki Sumitani
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Paper Abstract

We have investigated the ZEP resist characteristics of stress relaxation and reduction by applying some additives to the ZEP resist. The stress of the resist film was significantly reduced in ZEP resist with (beta) -Carotene. Without an additive, the stress of the ZEP resist film reduced from 30 MPa to 25 MPa as a result of the delay time after resist coating. On the other hand, with the addition of 5 wt% (beta) - Carotene, the stress of the resist film just after coated was almost same to that of the resist film without an additive. The stress, however, decreased to 15 MPa for one month. The stress change caused by deep UV exposure in the (beta) - Carotene additive system became one-third of that in the non- additive system. This system had a similar pattern replication quality to the original ZEP resist. It is considered that this system is useful for improving the image placement accuracy in EB writing on the membrane such as an x-ray mask.

Paper Details

Date Published: 21 July 2000
PDF: 6 pages
Proc. SPIE 3997, Emerging Lithographic Technologies IV, (21 July 2000); doi: 10.1117/12.390046
Show Author Affiliations
Atsuko Sasahara, Mitsubishi Electric Corp. (Japan)
Teruhiko Kumada, Mitsubishi Electric Corp. (Japan)
Koji Kise, Mitsubishi Electric Corp. (Japan)
Hiroaki Sumitani, Mitsubishi Electric Corp. (Japan)

Published in SPIE Proceedings Vol. 3997:
Emerging Lithographic Technologies IV
Elizabeth A. Dobisz, Editor(s)

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