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ST200 - Magnesium Diboride Flexible Flat Cables for Cryogenic Electronics

Magnesium Diboride Flexible Flat Cables for Cryogenic Electronics

Chris S. Yung and Brian H. Moeckly

Abstract - Magnesium diboride (MgB2) thin films are a potential alternative to low-temperature superconductors (LTS) due to a higher critical temperature (Tc) of approximately 39 K. The reactive evaporation deposition technique also affords relatively simple growth of MgB2 films on flexible substrates compared to high-temperature superconductors (HTS). We have designed and fabricated a cable architecture consisting of MgB2 traces on flexible yttria-stabilized zirconia (YSZ) compatible with commercially available connectors or direct wirebonds. Key performance metrics such as critical current density (Jc) and Tc are measured and compared. We discuss thermal conductivity and passivation schemes for these cables.

Index Terms - Cryogenic electronics, interconnections, MgB2, superconducting devices, superconducting thin films.

IEEE/CSC & ESAS European Superconductivity News Forum (ESNF), No. 14, October 2010
The published version of this manuscript appeared in IEEE Transactions on Applied Superconductivity 21, Issue 3, 107 - 110 (2011)