Dresden 2011 – scientific programme
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DS: Fachverband Dünne Schichten
DS 7: Layer Properties: Electrical, Optical and Mechanical Properties
DS 7.1: Talk
Monday, March 14, 2011, 17:45–18:00, GER 37
Ink-jet printing of silver tracks on porous surfaces and improvement of conductivity — •Anna Schuppert1, Joachim Wollschläger2, Lorentz Walder3, and Wolfgang Schmidt4 — 1Max-Planck-Institut für Eisenforschung, Düsseldorf — 2Fachbereich Physik, Universität Osnabrück — 3Fachbereich Chemie, Universität Osnabrück — 4Felix Schoeller Service GmbH und Co. KG, Osnabrück
Different porous coatings on polyethylene treated paper were checked as a support for ink-jet printed silver tracks. The goal of this work, was to achieve a good conductivity at short post processing and low temperatures. This was achieved by a presintering initialised by the surface.
For this purpose thin films of Al2O3 particles on PE-sealed paper were prepared and the pore size distribution was measured with Hg-Porosimetry. Using a Dimatix Materials Printer silver tracks were printed on these substrates. The resistance was measured with a four point probe and analysed as a function of the pore size.
It was found that smaller pore sizes yield higher conductivity, which is interpreted as a destabilisation of the ink immediately after printing. The initial conductivity can be improved by sintering for some minutes at 70 ∘C or 100 ∘C. Other important parameters influencing the conductivity found in this study are roughness, pH and added salts.