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Combined Use of Magnetic and Electrically Conductive Fillers in a Polymer Matrix for Electromagnetic Interference Shielding

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The combined use of a highly magnetic filler (mumetal) in low proportion and a highly conductive filler in high proportion in a polymer matrix provides a composite material that is more effective for electromagnetic interference shielding than the use of a highly magnetic filler alone or the use of a highly conductive filler alone. Mumetal is effective (due to absorption) when it is in a composite material of DC electrical resistivity below 10 Ω cm, as provided by conductive fillers, which contribute to shielding by reflection and allow paths for eddy current.

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  1. Junhua Wu

    Present address: Chomerics Division, Parker Hennifin Co., 77 Dragon Court, Woburn, MA, 01888, USA

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  1. Composite Materials Research Laboratory, University at Buffalo, State University of New York, Buffalo, NY, 14260-4400, USA

    Junhua Wu & D.D.L. Chung

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  1. Junhua Wu
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  2. D.D.L. Chung
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Correspondence to D.D.L. Chung.

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Wu, J., Chung, D. Combined Use of Magnetic and Electrically Conductive Fillers in a Polymer Matrix for Electromagnetic Interference Shielding. J. Electron. Mater. 37, 1088–1094 (2008). https://doi.org/10.1007/s11664-008-0486-4

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  • DOI: https://doi.org/10.1007/s11664-008-0486-4

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