The miniaturisation of Josephson interferometer memory cells for nondestructive read out

A static, nonvolatile interferometer memory cell prototype for nondestructive read out has been implemented with the lead alloy technology and tested successfully. For a Josephson current density of 3.5 kA/cm2the implemented cell area is about 3600 μm². For a Josephson current density with the niobium lead technology of 125 kA/cm²a miniaturisation of cell area to 50 μm²at 0.8 μm minimum line width seems feasible.