Novel route to extreme vacua: the non-evaporable getter thin film coatings

C. Benvenuti, J. M. Cazeneuve, P. Chiggiato, F. Cicoira, A. Escudeiro Santana, V. Johanek, V. Ruzinov, J. Fraxedas

    Research output: Contribution to journalArticleResearchpeer-review

    97 Citations (Scopus)

    Abstract

    Vacuum chambers sputter-coated with a thin film (approx. 1.5 μm) of a getter material, and subsequently exposed to ambient air, have been found to recover a pumping action after 'in situ' bakeout. Coatings of Ti, Hf, Zr have been initially produced and studied, followed by their binary quasi-equiatomic alloys TiHf, HfZr, TiZr. All these coatings display activation at temperatures lower than 400°C, as observed by means of X-ray photoelectron spectroscopy, electron stimulated desorption (ESD), pumping speed and ultimate pressure measurements. The lowest activation onset temperature, about 200°C, has been measured for the quasi-equiatomic TiZr alloy. A further activation temperature decrease has been achieved for TiZr based ternary alloys/compounds, which are currently being investigated.
    Original languageEnglish
    Pages (from-to)219-225
    JournalVacuum
    Volume53
    Issue number1-2
    DOIs
    Publication statusPublished - 1 Jan 1999

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