21 March 2007 Low-viscosity and fast-curing polymer system for UV-based nanoimprint lithography and its processing
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Abstract
One of the key elements for the successful integration of nanoimprint lithography into industrial production processes is the availability of high-performance resist materials. In this contribution we present a novel low-viscosity and fast curing UV-NIL polymer, which is applied by spin-coating and designed for wafer-scale imprinting. Systematic investigations of photocurable components and photoinitiators led to the formulation of the polymer system mr-UVCur06. Film thicknesses in the range of 50 - 500 nm with excellent quality and uniformity could be obtained by spin-coating. Its suitability for UV-NIL processes was evaluated by means of imprinting tests and plasma etching investigations. This included investigations on imprinting with hard moulds, UV curing doses, resolution, etch rates using various plasma gases and pattern transfer. The beneficial flow behaviour of mr-UVCur06 led to short UV-NIL cycle times. Patterns of several orders of magnitude with feature sizes in the range of 30 nm to several tens of micrometers could be imprinted simultaneously. An example of a pattern transfer into Si was shown, where mr-UVCur06 was used as an polymer etch mask.
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Marko Vogler, Marko Vogler, Markus Bender, Markus Bender, Ulrich Plachetka, Ulrich Plachetka, Andreas Fuchs, Andreas Fuchs, Sabine Wiedenberg, Sabine Wiedenberg, Freimut Reuther, Freimut Reuther, Gabi Grützner, Gabi Grützner, Heinrich Kurz, Heinrich Kurz, "Low-viscosity and fast-curing polymer system for UV-based nanoimprint lithography and its processing", Proc. SPIE 6517, Emerging Lithographic Technologies XI, 651727 (21 March 2007); doi: 10.1117/12.708507; https://doi.org/10.1117/12.708507
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