Impact of supercritical CO(2) drying on roughness of hydrogen silsesquioxane e-beam resist
2006 (English)In: Journal of Vacuum Science & Technology B, ISSN 1071-1023, E-ISSN 1520-8567, Vol. 24, no 2, 570-574 p.Article in journal (Refereed) Published
Surface roughness (SR) and, especially, the closely related line-edge roughness (LER) of nanostructures are important issues in advanced lithography. In this study, the origin of surface roughness in the negative tone electron resist hydrogen silsesquioxane is shown to be associated with polymer aggregate extraction not only during resist development but also during resist drying. In addition, the impact of exposure dose and resist development time on SR is clarified. Possibilities to reduce SR and LER of nanostructures by optimizing resist rinsing and drying are evaluated. A process of supercritical CO(2) resist drying that delivers remarkable reduction of roughness is presented. (c) 2006 American Vacuum Society.
Place, publisher, year, edition, pages
2006. Vol. 24, no 2, 570-574 p.
IdentifiersURN: urn:nbn:se:kth:diva-50554DOI: 10.1116/1.2167990ISI: 000237172000011OAI: oai:DiVA.org:kth-50554DiVA: diva2:495321
QC 201203022012-02-082011-12-062012-03-02Bibliographically approved