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MM: Fachverband Metall- und Materialphysik

MM 16: Poster Ia

MM 16.11: Poster

Montag, 18. März 2024, 18:30–20:30, Poster E

Investigation of the Anisotropic Conductivity in Printed Nanosilver — •Lennart Schwan^1,2, Michael Feige¹, Laila Bondzio², Hütten Andreas², and Sonja Schöning¹ — ¹Bielefeld Institute for Applied Materials Research (BIfAM), Hochschule Bielefeld - University of Applied Sciences and Arts — ²Thin Films & Physics of Nanostructures, Bielefeld University

3D printing is an emerging technology with a wide range of applications. The modern multi-material jetting process, such as that used in the Nano Dimension Dragonfly Pro LDM, makes it possible to print dielectric and conductive materials in a single process. In addition to printing flat structures such as printed circuit boards, three-dimensional structures such as antennas, coils or cooling elements can also be realized.

A special characteristic of the printed conductive material is the anisotropy of the electrical conductivity. Our investigation is dedicated to the origin of the anisotropy.

Investigations in the SEM show a direction-dependent crack structure. In order to investigate the influence of the cracks, we generate geometries from SEM images of the surface and simulate the current flow and the influence/impact on the effective conductivity using FEM. A further explanation results directly from the printing process, in which the surfaces are created from alternating offset printing lines. In order to investigate the influence of the resulting boundary layers on the anisotropic conductivity, we create additional boundary layers by manipulating the printing process.