Abstract
The first single-chip superconductor FLUX-1 microprocessor prototype with a target clock frequency of 17-20 GHz has been designed in the Rapid Single Flux Quantum (RSFQ) logic and fabricated using low- temperature 4 kA/cm', 1.75-pm Nb/AlOx/Nb Josephson junction technology. A FLUX-1 chip represents an %bit deeply pipelined microprocessor with a new parallel partitioned architecture that has been developed to tolerate interconnect delays and fill long FLUX-1 pipelines with operations. A FLUX-1 chip contains 65,759 Josephson junctions on a 10.6 mm x 13.2 mm die with flip-chip packaging. First FLUX-I chips fabricated in 2001 are currently under testing at TRW.
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