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Proceedings Paper

New methods for fabricating step and flash imprint lithography templates
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Paper Abstract

Step and Flash Imprint Lithography (SFIL) is an attractive method for printing sub-100 nm geometries. Relative to other imprinting processes SFIL has the advantage that the template is transparent, thereby facilitating conventional overlay techniques. The purpose of this work is to investigate alternative methods for defining features on an SFIL template. The first method used a much thinner (< 20 nm) layer of Cr as a hard mask. Thinner layers still suppress charging during e-beam exposure of the template, and have the advantage that CD losses encountered during the pattern transfer of the Cr are minimized. The second fabrication scheme addresses some of the weaknesses associated with a solid glass substrate. Because there is no conductive layer on the final template, SEM and defect inspection are compromised. By incorporating a conductive and transparent layer of indium tin oxide on the glass substrate, charging is suppressed during inspection, and the UV characteristics of the final template are not affected. Templates have been fabricated using the two methods described above. Features as small as 30 nm have been resolved on the templates. Sub-80 nm features were resolved on the first test wafer printed.

Paper Details

Date Published: 24 July 2002
PDF: 6 pages
Proc. SPIE 4608, Nanostructure Science, Metrology, and Technology, (24 July 2002); doi: 10.1117/12.437269

Published in SPIE Proceedings Vol. 4608:
Nanostructure Science, Metrology, and Technology
Martin C. Peckerar; Michael T. Postek Jr., Editor(s)

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