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Proceedings Paper

Multilayered Josephson junction logic and memory devices
Author(s): Susanne Lomatch; Edward D. Rippert; John B. Ketterson
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Paper Abstract

Flux quantum logic and memory circuits using superconducting Josephson tunnel junctions have high-speed switching times (approximately 1 ps), low power dissipation (< 1 (mu) W per circuit) and low levels of thermally induced electrical noise. Current designs of such circuits employ single trilayer junctions, which impose circuit size and logic threshold limitations. A new design component, the multilayered tunnel junction, consists of a vertically stacked array (a 1D superlattice) of Josephson tunnel junctions. The introduction of multilayered junctions into superconducting electronic circuitry offers a reduction in the current device size, fault tolerances, and new device applications. We present numerical simulations of simple circuits employing multilayered Josephson junctions as design components. Comparison with conventional single flux quantum circuitry is discussed. We also present preliminary measurements of multilayered Josephson junctions fabricated for use in flux quantum devices.

Paper Details

Date Published: 29 June 1994
PDF: 12 pages
Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); doi: 10.1117/12.179165
Show Author Affiliations
Susanne Lomatch, Northwestern Univ. (United States)
Edward D. Rippert, Northwestern Univ. (United States)
John B. Ketterson, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 2157:
Superconducting Superlattices and Multilayers
Ivan Bozovic, Editor(s)

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