Deepfreeze electronics for supercomputers—technology prepares quantum computing for industrial use

https://phys.org/news/2023-02-deepfreeze-electronics-supercomputerstechnology-quantum-industrial.html

"indium, superconducting below 3.4°K, electroplated using special electrolytes... new metallized base a seed layer for electroplating... record miniaturization for cryogenic connections... grid spacing of connectors <10 μm... also low-loss superconducting connectors from niobium and niobium nitride coatings then etched by ion ray creating compact connectors in cryogenic alloy handling"