1.4 mil2 memory cell with Josephson junctions

An integrated loop memory cell with miniaturized Josephson junction dimensions (approximately 5 x 5 μm2) and very high Josephson current density (30 kA/cm2) was made in a 2 μm minimum line width lead alloy. The storage currents are easily set up with coincident word and digit pulses. Nondestructive read-out, write, and half selection was successfully performed. The deduced current transfer time during write is below 80 ps