Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Josephson junction – per se or josephson junction with only...
Patent
1996-05-30
1998-12-15
Yamnitzky, Marie
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Josephson junction, per se or josephson junction with only...
505220, 505235, 505236, 505237, 505238, 505239, 505702, 257 34, 428209, 428210, 428697, 428699, 428700, 428701, 428702, 428930, 428931, H01L 3922
Patent
active
058496696
ABSTRACT:
A high critical temperature superconducting Josephson device includes a bicrystal substrate formed of a first single crystal substrate and a second single crystal substrate, with end faces of the first and second single crystal substrates having different crystal orientations and being joined to each other. A first superconducting electrode formed of a first film of a high critical temperature superconductor material is located on the first single crystal substrate, whereas a second superconducting electrode formed of a second film of a high critical temperature superconductor material is located on the second single crystal substrate. A bridge is formed of a third film of a high critical temperature superconductor material and located on the bicrystal substrate across a joint between said first and said second single crystal substrates. The bridge includes a first part formed on the first single crystal substrate and connected with the first electrode, a second part formed on the second single crystal substrate and connected with the second electrode, and a third part interposed between the first part and second part on the joint between the first and the second single crystal substrates. A weak link formed of a conductive film is located on a portion of said bridge and has a conductivity which is less than that of the first and second superconducting electrodes. The conductive film is formed over the joint so as to extend across the third part from the first part to the second part of the bridge. A superconductive path is formed from the first electrode to the second electrode via the first part of the bridge, the weak link and the second part of the bridge during a state in which the third part of the bridge is non-superconductive.
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OKI Electric Industry Co., Ltd.
Yamnitzky Marie
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