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Department of Digital Printing and Imaging Technology
Digital Printing and Imaging Technology


Development of a new ink system for the production of metallic, conductive functional layers using inkjet technology
Funding source: DFG
GZ: BA 1169/4-1
Duration: 01.04.2008 - 31.03.2010
  • Institut für Chemie, Lehrstuhl für Anorganische Chemie, TU Chemnitz
  • Institut für Print und Medientechnik, Professur Digitale Drucktechnologien und Bebilderungstechnik, TU Chemnitz
Abstract: The DFG project is a co-operation with the Department of Inorganic Chemistry (Prof. Lang) of Chemnitz University of Technology. The aim of the project is the development of novel metal-organic ink systems for structured metallization by inkjet printing. Conventional conductive ink systems consist of metal particles dispersed in polymeric binders or stabilized dispersions of actual nanoparticles. These inks tend to clog the narrow nozzles of the inkjet printhead. As an alternative, the ink which is to be developed is to be composed of dissolved metal-containing molecules. For the present purpose, this class of substances which is known as metal-organic complexes (coordination complexes) is to be water-soluble and the decomposition of these molecules is to take place at defined, comparatively low temperatures. During this tempering or sintering step, volatile organic compounds are formed as reaction products; the elemental metal is deposited on the surface of the substrate. The specific conditions and process parameters for the production of metallic functional layers are examined using the example of silver precursors. For the characterization of the printed layers, methods of impedance spectroscopy are of interest in order to analyze material concentrations and the homogeneity of the mixtures. Low currents in the µA range and low frequencies higher than mHz are considered appropriate.
Staff TUC: Dipl.-Ing. Stephan Jahn


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