SKM 2021 – scientific programme
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DS: Fachverband Dünne Schichten
DS 4: Poster
DS 4.12: Poster
Tuesday, September 28, 2021, 10:00–13:00, P
Simulation Based Conductivity Tensor Determination of Sintered Nanosilver — •Lennart Schwan1,2, Michael Feige1, Andreas Hütten2, and Sonja Schöning1 — 1Bielefeld Institute for Applied Materials Research (BIfAM), Bielefeld University of Applied Sciences, Department of Engineering Sciences and Mathematics, Interaktion 1, 33619 Bielefeld — 2Thin Films & Physics of Nanostructures, Bielefeld University, Department of Physics, Universitätsstrasse 25, 33615 Bielefeld, Germany
3D-printing of conductive and dielectric materials in one process is an emerging technology. In addition to the printing of planar structures like circuit boards, the modern Multi Material Jetting process allows to realize three dimensional structures such as antennas, coils or cooling elements.
In the present case the conductive material consists of small silver particles which are sintered with infrared light. The conductivity reaches up to 70 % of the conductivity of copper but is highly anisotropic due to the print and sinter process.
In order to optimize the printed structures with regard to the anisotropic conductivity, it is necessary to determine reliable value of the conductivity tensor. Here we propose an approach based on a coupling of FEM simulation with mathematical optimization to determine the conductivity tensor. The simulation with the conductivity tensor as free parameter is fitted to experimental data of meander shaped test structures which are orientated in different directions to consider all components of the conductivity tensor.