Electron-Beam Deposition of Superconducting Molybdenum Thin Films for the Development of Mo/Au TES X-ray Microcalorimeter

Authors:
  • JAJoseph S. Adams
    Joseph S. Adams
  • SBSimon R. Bandler
    Simon R. Bandler
  • GBGabriele L. Betancourt-Martinez
    Gabriele L. Betancourt-Martinez
  • ABAri David Brown
    Ari David Brown
  • MCMeng-Ping Chang
    Meng-Ping Chang
  • JCJames A. Chervenak
    James A. Chervenak
  • MCMeng P. Chiao
    Meng P. Chiao
  • ADAaron M. Datesman
    Aaron M. Datesman
  • MEMegan E. Eckart
    Megan E. Eckart
  • RKRichard L. Kelley
    Richard L. Kelley
  • CKCaroline A. Kilbourne
    Caroline A. Kilbourne

Abstract
We are exploring the properties of electron-beam evaporated molybdenum thin films on silicon nitride coated silicon wafers at substrate temperatures between room temperature and 650 ºC. The temperature dependence of film stress, transition temperature and electrical properties are presented. X-ray diffraction measurements are performed to gain information on molybdenum crystallite size and growth. Results show the dominant influence of the crystallite size on the intrinsic properties of our films. Wafer-scale uniformity, wafer yield and optimal thermal bias regime for TES fabrication are discussed.

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