Abstract A Josephson device, comprising a junction formed by forming the first layer-shaped oxide superconductor thin film including a plurality of Cu-O layers on a substrate, a barrier layer thereon and the second layer-shaped oxide superconductor thin film on the barrier layer. The Josephson device according to the present invention is manufactured by forming the first layer-shaped oxide superconductor thin film on a substrate, forming a barrier layer in the same vacuum chamber, defining patterns to said barrier layer and said first layer-shaped oxide superconductor thin film, forming an interlayer insulating film on said barrier layer, removing said interlayer insulating film in a region serving as a junction, effecting exposure to oxygen plasma, forming the second layer-shaped oxide superconductor thin film in contact with a part of the surface of said barrier layer and defining patterns to said second layer-shaped oxide superconductor thin film.
A Josephson device, comprising a junction formed by forming the first layer-shaped oxide superconductor thin film including a plurality of Cu-O layers on a substrate, a barrier layer thereon and the second layer-shaped oxide superconductor thin film on the barrier layer wherein a material of said barrier layer is a Bi oxide type layer-shaped compound.
Claim 2
Dependent Claim
55 words
A Josephson device, comprising a junction formed by forming the first layer-shaped oxide superconductor thin film including a plurality of Cu-O layers on a substrate, a barrier layer thereon and the second layer-shaped oxide superconductor thin film on the barrier layer wherein a material of said barrier layer is a Bi oxide type layer-shaped compound.
Claim 3
Dependent Claim
29 words
A Josephson device according to claim 1, wherein said Bi oxide type layer-shaped compound is Bi 2 Ti 4 O 11 or Bi 4 Ti 3 O 12 .
Claim 4
Dependent Claim
101 words
A Josephson device comprising a junction formed by forming the first layer-shaped oxide superconductor thin film including a plurality of Cu-O layers on a substrate, a barrier layer thereon and the second layer-shaped oxide superconductor thin film on the barrier layer, wherein an interlayer insulating film is formed above said first layer-shaped oxide superconductor thin film and surrounds said junction, and a layer-shaped oxide superconductor thin film for wiring is formed on said second layer-shaped oxide superconductor thin film of said junction, wherein a material of said barrier layer or said interlayer insulating film is a Bi oxide type layer-shaped compound.
Claim 5
Dependent Claim
101 words
A Josephson device comprising a junction formed by forming the first layer-shaped oxide superconductor thin film including a plurality of Cu-O layers on a substrate, a barrier layer thereon and the second layer-shaped oxide superconductor thin film on the barrier layer, wherein an interlayer insulating film is formed above said first layer-shaped oxide superconductor thin film and surrounds said junction, and a layer-shaped oxide superconductor thin film for wiring is formed on said second layer-shaped oxide superconductor thin film of said junction, wherein a material of said barrier layer or said interlayer insulating film is a Bi oxide type layer-shaped compound.
Claim 6
Dependent Claim
29 words
A Josephson device according to claim 3, wherein said Bi oxide type layer-shaped compound is Bi 2 Ti 4 O 11 or Bi 4 Ti 3 O 12 .