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US5047390A Expired / Lapsed US ⏱️ 0.0 years remaining

Josephson devices and process for manufacturing the same

Assignee: Panasonic Holdings Corp
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Filing: 1989-09-27
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Granted: 1991-09-10
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Expires: 2009-09-27
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Abstract

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.

Inventors

  • 👤 Hidetaka Higashino
  • 👤 Koichi Mizuno
  • 👤 Hideaki Adachi
  • 👤 Kentaro Setsune
  • 👤 Akira Enokihara
  • 👤 Shinichiro Hatta
  • 👤 Kiyotaka Wasa
  • 👤 Shigemi Kohiki
  • 👤 Tomoaki Matsushima

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 15:11
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0912; H10N60/0941; Y; Y10; Y10S; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/702; Y10S505/825; Y10S505/873; Y10S505/874

Claims Analysis

Total Claims: 6
Claim 1
Independent 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 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 .

References Cited (Backward Citations)

JPS582082A Cited
JPS5877265A Cited
JPS58128780A Cited
US4499119A Cited
JPS61220385A Cited
JPS63224273A Cited
EP0342038A2 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1994-09-09 1995-03-11 1995-09-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1998-09-09 1999-03-11 1999-09-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2002-09-09 2003-03-11 2003-09-10 $7700.00 Window Closed / Lapsed

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