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US4319256A
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Josephson junction element
Assignee: Hitachi Ltd
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Filing: 1980-05-02
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Granted: 1982-03-09
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Expires: 2000-05-02
Abstract
Abstract A sandwich-type Josephson junction element wherein a counter electrode is made of a Mo-Re alloy which contains 10-90 atomic-% of Re. The Josephson junction element has a high operating temperature, and any deterioration thereof attributed to a thermal cycle is not noted.
Inventors
- 👤 Yoshinobu Tarutani
- 👤 Hirozi Yamada
- 👤 Ushio Kawabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:15
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/10; H10N60/12; H10N60/80; H10N60/85; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/873; Y10S505/874
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
In a sandwich-type Josephson junction element having a base electrode which is made of a superconductive material, a barrier layer which is formed of an insulating film and/or semiconductor film disposed on the base electrode, and a counter electrode which is made of a superconductive material disposed on the barrier layer, a Josephson junction element characterized in that said counter electrode is made of a Mo.-Re. alloy which contains 10 to 90 atomic-% of Re.
Claim 2
Dependent Claim
75 words
In a sandwich-type Josephson junction element having a base electrode which is made of a superconductive material, a barrier layer which is formed of an insulating film and/or semiconductor film disposed on the base electrode, and a counter electrode which is made of a superconductive material disposed on the barrier layer, a Josephson junction element characterized in that said counter electrode is made of a Mo.-Re. alloy which contains 10 to 90 atomic-% of Re.
Claim 3
Dependent Claim
22 words
A Josephson junction element as defined in claim 1, characterized in that said Mo.-Re. alloy contains 20 to 80 atomic-% of Re.
Claim 4
Dependent Claim
22 words
A Josephson junction element as defined in claim 1, characterized in that said Mo.-Re. alloy contains 40 to 50 atomic-% of Re.
Claim 5
Dependent Claim
43 words
A Josephson junction element as defined in claim 1, 2 or 3, characterized in that said base electrode is made of the superconductive material which has a critical temperature equal to or higher than that of said Mo.-Re. alloy forming said counter electrode.
Claim 6
Dependent Claim
30 words
A Josephson junction element as defined in claim 1, 2 or 3, characterized in that at least part of the material forming said base electrode is a transition metal element.
Claim 7
Dependent Claim
70 words
A Josephson junction element as defined in claim 1, 2 or 3, characterized in that the material forming said base electrode is one superconductive material selected from the group consisting of V 3 Si., V 3 Ga., V 3 Al., Nb 3 Ga., Nb 3 Al., Nb 3 Si., Nb 3 Ge., Nb 3 Sn., NbN., MoC., MoN., and a Mo.-Re. alloy which contains 10 to 90 atomic-% of Re.
Claim 8
Dependent Claim
34 words
A Josephson junction element as defined in claim 1, 2 or 3, characterized in that the material forming said base electrode is the same Mo.-Re. alloy as the superconductive material forming said counter electrode.
Claim 9
Dependent Claim
33 words
A Josephson junction element as defined in claim 1, 2, 3, 4, 5, 6 or 7, characterized in that at least part of a material forming said barrier layer is a Si. oxide.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |