NANOSTRUCTURING OF POLYMERS IN LIQUID BY THE USE
OF POLYMER CRAZING
A.S. Körbes1, L.J. Balk1
and J.W. Schultze 2
Lehrstuhl für Elektronik, Universität Wuppertal,
Fuhlrottstr. 10, 42119 Wuppertal
Institut für physikalische Chemie und Elektrochemie,
Universitätsstr. 1, 40225 Dusseldorf
The development of nanostructures is usually based on UV- or
DUV-lithography. Using these techniques, a new set of lithographic masks has to
be generated for each step in development. Other methods to create
nanostructures are the direct writing techniques like e-beam, but this
techniques suffer from very high installation and operation costs.
To overcome these cost and time intensive procedures we have developed an
in-situ technique which allows to write lateral structures with a resolution of
80 nm over an area of up to 100 µm in square with simultaneous
characterization. This method is based on a conventional scanning force
microscope modified for the use in a development liquid onto a commercial
available PMMA/MA e-beam resist and is independent of the substrate material.
Specific variations of the tip force which define the depth of structuring
allow even structures with oblique faces. Furthermore it has to be emphasized
that negative structures can be processed on the in fact positive resist. The
created patterns could act as templates for the deposition of e.g. metals or
alloys. This can be followed by further lithographic processes of the presented
For the structuring a completely new mechanism is used. The polymer chains are
not cracked as in e-beam lithography, but the crazing of the polymer is used.
With new experiments we can prove the fundamentals of the presented technique.
In this presentation we will illustrate the feasibilities of this method with
respect to electrochemical applications on several examples.
full paper (pdf, 400 Kb)