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Ferrari, A. |
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Schimpf, Christian |
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Dunser, M. |
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Thomas, Eric |
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Gecse, Zoltan |
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Tsrunchev, Peter |
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Della Ricca, Giuseppe |
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Cios, Grzegorz |
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Hohlmann, Marcus |
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Dudarev, A. |
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Mascagna, V. |
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Santimaria, Marco |
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Poudyal, Nabin |
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Piozzi, Antonella |
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Mørtsell, Eva Anne |
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Jin, S. |
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Noel, Cédric |
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Fino, Paolo |
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Mailley, Pascal |
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Meyer, Ernst |
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Zhang, Qi |
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Pfattner, Raphael | Brussels |
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Kooi, Bart J. |
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Babuji, Adara |
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Pauporte, Thierry |
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Miller, Sm
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Direct wet printing of polumer solutions for high resolution lithography
Abstract
Stable liquid and polymer structures can be formed by dip-coating chemically patterned substrates into a liquid reservoir and withdrawing at constant speed. The desired liquid shapes form on substrates coated with a pre-patterned self-assembled monolayer of OTS or HDT. Microscale feature sizes are easily obtained. For a dip-coated sample consisting of weIl spaced vertical hydrophilic strip es surrounded by hydrophobic regions, the maximum deposited film thickness scales as W Ca 1/3, where W is the stripe width and Ca the capillary number based on the plate withdrawal speed, are suit well confirmed by experiment. This correlation is markedly different from the classic Landau-Levich result for the dip-coating of chemically homogeneous surfaces. The dependence on the stripe width, W, permits the deposition of very thin liquid layers. The liquid microstructures formed by dip-coating are then brought into contact with a hydrophilic surface to mimic an offset printing press. This techique has so far printed 5 mu m wide PEO stripes. Optimization of this process should lend itself to the rapid reproduction of liquid and semi-solid microstructure elements.+