Josephson junction element with an asymmetric groove providing a

Details Josephson junction element with an asymmetric groove providing a Josephson junction element with an asymmetric groove providing a

1997-06-12

1999-07-20

Saadat, Mahshid

Active solid-state devices (e.g., transistors, solid-state diode

Thin active physical layer which is

Tunneling through region of reduced conductivity

257 31, 257 33, 505239, H01L 2906, H01L 310256, H01L 3922

Patent

active

059258926

ABSTRACT:
A Josephson junction element having a substrate of a single crystal having a V-shaped notch formed in a surface of the substrate and a wiring pattern of an oxide superconductor formed on the surface of the substrate and crossing the notch to form a weak link region in the pattern at a position above the notch. The notch is defined by first and second walls joining with each other at the bottom of the notch and has first and second corners at which the first and second walls meet the surface of the substrate. The first and second corners have radii of curvature of 5-50 nm and 50-500 nm, respectively, provided that the difference in radius of curvature between the first and second corners is not smaller than 10 nm. The notch is formed by obliquely irradiating a predetermined portion of the substrate with a focused ion beam.

REFERENCES:
patent: 5196395 (1993-03-01), James et al.
patent: 5498881 (1996-03-01), Fujimoto et al.

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