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Sintering of conductive inks on plastic substrates by use of microwave furnaces being suitable for largescale production processes

: Hartmann, Lutz; Sabban, Jakob; Behrendt, Felix; Tatai, Tiberiu-Mihai; Neermann, Simone; Franke, Jörg; Dreyer, Christian


Franke, J. ; Institute of Electrical and Electronics Engineers -IEEE-:
14th International Congress Molded Interconnect Devices, MID 2021. Scientific Proceedings : February 8th-11th, 2021, virtual event
Piscataway, NJ: IEEE, 2021
ISBN: 978-1-7281-7510-2
ISBN: 978-1-7281-7509-6
International Congress Molded Interconnect Devices (MID) <14, 2021, Online>
Bundesministerium fur Wirtschaft und Energie BMWi (Deutschland)
21135 BG / 3; Sintern gedruckter leitfähiger Strukturen durch Energieeintrag mittels Mikrowellenbestrahlung
Conference Paper
Fraunhofer IAP ()
microwave sintering; specific resistance; conductive ink; electromagnetic simulation; conductivity; GFRP

This work is about the application of large-scale microwave furnaces being suitable for the sintering of conductive structures deposited on standard plastic parts in industrial processes. The conductive structures are consisting of carbon or silver filled conductive inks. The feasibility of microwave sintering is proved by comparing the specific resistance of structures subjected to microwave sintering with conductive paths on reference samples sintered in a convection furnace. Furthermore, optical microscopy has been employed to inspect the surface morphology of conductive paths sintered by both microwave furnace and convection furnace. It turns out that appropriate microwave sintering depends on the specific way the magnetron power is controlled in the furnace and on the temporal evolution of magnetron power during the sintering process.