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Laboratory for Micro and Nanotechnology

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Nanoimprint Lithography

Nanoimprint Lithography (NIL) is a novel technique for the fabrication of nanostructures on large surfaces. The method is based on the excellent replication fidelity obtained with polymers. Once a solid stamp with a nanorelief on the surface is fabricated it can be used for the replication of many identical surface patterns. It therefore circumvents many limitations of conventional photolithography. In PSI we use both thermal NIL into various thermoplastic materials and UV-assisted NIL, e.g. for the fabrication of stamp copies.

NIL Process Chain
NIL Process Chain
The process chain mainly consists of the three steps:
  1. Align substrate, resist and stamp
  2. Imprint into polymer film
  3. Pattern transfer into substrate


The pattern transfer is often necessary if the imprinted polymer is not directly used as a functional material, but for patterning a large area substrate such as a silicon wafer or magnetic disc. It is therefore able to replace common high resolution lithography which is either costly or not able to pattern complex structures with 3D surface topographies.

Publications

Nanoimprint lithography: An old story in modern times? A review
J. Vac. Sci. Technol. B 26(2), 458-480 (2008)
Helmut Schift

NaPa Library of Processes
editor H.Schift, published by the NaPa-consortium
first edition (2008) ISBN 978-3-00-024396-7, second edition (2012)
Free download: NaPa Library of Processes

Nanoimprint lithography - patterning resists using molding
H. Schift and A. Kristensen
Handbook of Nanotechnology, Chapter (Part A/9), third edition, revised and extended, 2010
Springer Verlag Berlin Heidelberg, Germany. ISBN: 978-3-642-02524-2

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Contact

Dr. Helmut Schift

Laboratory for Micro-
and Nanotechnology
Paul Scherrer Institut
5232 Villigen PSI
Switzerland

Telephone:
+41 56 310 2839
Telefax:
+41 56 310 2646
E-mail:
helmut.schift@psi.ch

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