Superconductor junction structure including two oxide supercondu

Details Superconductor junction structure including two oxide supercondu Superconductor junction structure including two oxide supercondu

1994-12-29

1996-01-30

Saadat, Mahshid

Superconductor technology: apparatus, material, process

High temperature devices, systems, apparatus, com- ponents,...

Josephson junction, per se or josephson junction with only...

505237, 505239, 257 33, 257 35, H01B 1200, H01L 2906, H01L 3922

Patent

active

054880300

ABSTRACT:
There is disclosed a superconductor junction structure comprising: a first superconducting layer of an oxide superconductor formed in a desired pattern on a substrate; a non-superconducting layer of a non-superconductor formed on at least a part of the side faces of the first superconducting layer, a portion of the surface of the substrate near the part, and a top face of the first superconducting layer; and a second superconducting layer of the oxide superconductor formed on the non-superconducting layer, the non-superconducting layer being formed thin at the part, and forming a tunnel barrier. And further there is disclosed a process for fabricating a superconductor junction structure comprising: the first step of forming a first superconducting layer of an oxide superconductor in a desired pattern on a substrate; the second step of forming a non-superconducting layer of a non-superconductor formed on at least a part of the side faces of the first superconducting layer, a portion of the surface of the substrate near the part, and a top face of the first superconducting layer by depositing the non-superconductor from the above; and the third step of forming a second superconducting layer of the oxide superconductor on the non-superconducting layer.

REFERENCES:
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Koch, R. H., "SQUIDs Made From High Temperature Superconductors,"Solid State Technology, vol. 33, No. 5, May 1990, pp. 255-260.
IBM Technical Disclosure Bulletin, (Author unknown to Applicant) vol. 31, No. 9, Feb. 1989, pp. 217.
Arikawa et al., "Crystal Orientaion of YBa.sub.2 Cu.sub.3 O.sub.7-y, Thin Films Prepared by RF Sputtering,"Japanese Journal of Applied Physics, vol. 29, No. 12 Dec., 1990, pp. L-2100-L-2202.

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