Method of fabricating grain boundary Josephson junction

Details Method of fabricating grain boundary Josephson junction Method of fabricating grain boundary Josephson junction

1989-02-21

1990-12-25

Roy, Upendra

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

156610, 156643, 20419224, 427 62, 437910, 505702, H01L 3922, H01L 3924

Patent

active

049803417

ABSTRACT:
A superconducting electronic device utilizes a weak link (Josephson junction) between two regions of superconductor material. A method of making such a device having a granular structure consists of taking a substrate with a predetermined grain size, and forming a thin film of superconducting ceramic upon it. The film adopts the grain size and structure of the substrate, and the film is then processed to form two relatively large areas of granular film connected by a thin link which contains a single grain boundary which acts as the weak link.

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Nakayama et al., Jap. Jour. Appl. Phys. 26 (Dec. 1987), L-2055.
Koch et al., Appl. Phys. Lett. 51 (1987), 200.
Rothschild et al., IEEE-Electron Device Letts. 9 (Feb. 1988), 68.
Liberts et al., Appl. Phys. A46 (Aug. 1988), 331.
Koch et al. in High Tc Superconductors, ed. Gubser et al., Apr. 87, Mrs, Pittsburgh.

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