Thin polyaniline films in EMI shielding

Tapio Mäkelä, Seppo Pienimaa, Tapani Taka, Salme Jussila, Heikki Isotalo

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    Electromagnetic interference shielding efficiency has been measured for highly electrically conducting Polyaniline-Camphor Sulfonic Acid. The polymer is spin coated from m-cresol solution on an electrically insulating substrate as a 1–30 μm thick layer having a conductivity of 10–100 S/cm. The shielding efficiencies (SE) for these electrically thin polyaniline films have been measured in the near-field with a dual-chamber box and in the far-field with a transmission line method in the frequency range 0.1–1000 MHz. The measurements show that SE depends primarily on the surface resistance both in the far-field and the near-field. An additional effect >10 dB is seen when the two layer structure is measured in the near field. By using layer structures, the SE is >40 dB up to ca. 100 MHz in the near-field and 39 dB at 1 GHz in the far-field.
    Original languageEnglish
    Title of host publicationProceedings of the International Conference on Science and Technology of Synthetic Metals (ICSM '96)
    Subtitle of host publicationElectronic polymers II
    EditorsZ. Valy Vardeny, Arthur J. Epstein
    Place of PublicationAmsterdam
    ISBN (Print)978-0-444-20510-0
    Publication statusPublished - 1997
    MoE publication typeA4 Article in a conference publication
    EventInternational Conference on Science and Technology of Synthetic Metals ICSM '96 - Snowbird, United States
    Duration: 28 Jul 19962 Aug 1996


    ConferenceInternational Conference on Science and Technology of Synthetic Metals ICSM '96
    Country/TerritoryUnited States


    Dive into the research topics of 'Thin polyaniline films in EMI shielding'. Together they form a unique fingerprint.

    Cite this