A 1.4 mil 2 memory cell with josephson junctions

An integrated loop-memory cell with miniaturized Josephson-junction dimensions (∼5 x 5 μm2) and very high Josephson current density (30 kA/cm2) has been made in a 2 um-minimum linewidth lead-alloy technology. The storage currents are easily set up with coincident word and digit pulses. Nondestructive readout, write and half selection has been successfully performed. The deduced current transfer time during write is below about 80 ps. Copyright © 1975 by The Institute of Electrical and Electronics Engineers, Inc.