Ru thin film grown on TaN by plasma enhanced atomic layer deposition

Q. Xie, Y.L. Jiang, J. Musschoot, D. Deduytsche, C. Detavernier, R.L. Van Meirhaeghe, Sven Van den Berghe, G.P. Ru, B.Z. Li, X.P. Qu

    Research outputpeer-review


    Ru thin films were sequentially deposited onto TaN (5 nm) by plasma enhanced atomic layer deposition using Ru(EtCp)(2) and NH3 as precursors. The effect of growth temperature on the electrical resistivity and morphology of the Ru films were studied. It was found that the Ru films can achieve a low resistivity of 14 mu Omega cm and a low root-mean-square roughness at a growth temperature of 270 degrees C. The thickness of the underlying TAN film was found to affect the Ru film growth. The oxidation of the very thin TaN film was correlated with the island growth of Ru. Ex and in-situ X-ray diffraction was employed to verify the copper diffusion barrier properties of a Ru (3 nm)/TaN (5 nm) bi-layer structure.
    Original languageEnglish
    Pages (from-to)4689-4693
    JournalThin Solid Films
    Issue number16
    StatePublished - 30 Jun 2009

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