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Investigation on the influence of injection molding parameters on high frequency permittivity up to 3 GHz on MID thermoplastics and reliability of permittivity during environmental testing

: Wolf, M.; Janek, F.; Meissner, T.; Wigger, B.; Barth, M.; Guenter, T.; Eberhardt, W.; Zimmermann, A.; Geneiss, V.; Lueke, T.; Hedayat, C.; Otto, T.


Institute of Electrical and Electronics Engineers -IEEE-:
13th International Congress Molded Interconnect Devices, MID 2018 : 25-26 September 2018, Würzburg
Piscataway, NJ: IEEE, 2018
ISBN: 978-1-5386-4933-6
ISBN: 978-1-5386-4932-9
ISBN: 978-1-5386-4934-3
International Congress Molded Interconnect Devices (MID) <13, 2018, Würzburg>
Fraunhofer ENAS ()

This paper reports on the influence of injection molding parameters and environmental testing on the permittivity of different thermoplastic materials used in MID technology. Permittivity and dielectric loss angle measurements up to frequencies of 3 GHz were performed by using suitable resonator structures on flat test substrates fabricated by LPKF-LDS ® technology. It was found that the permittivity of LCP is only negligibly affected by injection molding parameters. Furthermore, during environmental tests the best performance was observed for LCP.