  Inherent properties of superconducting Bi2Sr2CaCu2O8+x films, such as the
high superconducting transition temperature Tc, efficient Josephson coupling
between neighboring CuO layers, and fast quasiparticle relaxation dynamics,
make them a promising platform for advances in quantum computing and
communication technologies. However, preserving two-dimensional
superconductivity during device fabrication is an outstanding experimental
challenge because of the fast degradation of the superconducting properties of
two-dimensional flakes when they are exposed to moisture, organic sol vents,
and heat. Here, to realize superconducting devices utilizing two-dimensional
superconducting films, we develop a novel fabrication technique relying on the
cryogenic dry transfer of printable circuits embedded into a silicon nitride
membrane. This approach separates the circuit fabrication stage requiring
chemically reactive substances and ionizing physical processes from the
creation of the thin superconducting structures. Apart from providing
electrical contacts in a single transfer step, the membrane encapsulates the
surface of the crystal shielding it from the environment. The fabricated
atomically thin Bi2Sr2CaCu2O8+x-based devices show high superconducting
transition temperature Tc ~ 91 K close to that of the bulk crystal and
demonstrate stable super conducting properties
