US4145699A
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Superconducting junctions utilizing a binary semiconductor barrier
Assignee: AT&T Inc
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Filing: 1978-03-20
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Granted: 1979-03-20
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Expires: 1998-03-20
Abstract
Abstract Superconductor junctions adaptable for applications such as logic circuitry and magnetic flux detection are disclosed. These junctions utilize superconducting electrodes with a semiconductor barrier composed of a binary composition of germanium and tin. The composition of this binary composition strongly affects the electrical properties of the device. For example, when using two Sn electrodes, if the Sn/Ge ratio in the barrier is changed from 1:4 to 1:1 for a thickness of 600 A, the electrical properties of the junction transform from hysteretic to non-hysteretic characteristics.
Inventors
- 👤 Evelyn L. Hu
- 👤 Lawrence D. Jackel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:52
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/10; H10N60/12; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/873; Y10S505/874
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
30 words
A Josephson junction comprising a semiconductor barrier material in intimate contact with two superconducting electrodes CHARACTERIZED IN THAT said semiconductor barrier material comprises a binary composition of Ge and Sn.
Claim 2
Dependent Claim
30 words
A Josephson junction comprising a semiconductor barrier material in intimate contact with two superconducting electrodes CHARACTERIZED IN THAT said semiconductor barrier material comprises a binary composition of Ge and Sn.
Claim 3
Dependent Claim
15 words
The Josephson junction of claim wherein at least one of said superconducting electrodes contains Pb.
Claim 4
Dependent Claim
16 words
The Josephson junction of claim 1 wherein at least one of said superconducting electrodes contains In.
Claim 5
Dependent Claim
16 words
The Josephson junction of claim 1 wherein at least one of said superconducting electrodes contains Sn.
Claim 6
Dependent Claim
20 words
The Josephson junction of claim 1 wherein said binary composition has a Ge/Sn ratio in the range 10:1 to 2:3.
Claim 7
Dependent Claim
39 words
A superconductor junction comprising a semiconductor barrier material in intimate contact with two superconducting electrodes, CHARACTERIZED IN THAT said superconducting electrodes each consist essentially of tin and said semiconductor barrier material comprises a binary composition of Ge and Sn.
Claim 8
Dependent Claim
39 words
A superconductor junction comprising a semiconductor barrier material in intimate contact with two superconducting electrodes, CHARACTERIZED IN THAT said superconducting electrodes each consist essentially of tin and said semiconductor barrier material comprises a binary composition of Ge and Sn.
Claim 9
Dependent Claim
21 words
The superconductor junction of claim 6 wherein said binary composition has a Ge/Sn ratio in the range between 10:1 and 2:3.
Claim 10
Dependent Claim
12 words
The superconductor junction of claim 7 wherein said ratio is approximately 1:1.
Claim 11
Dependent Claim
12 words
The superconductor junction of claim 7 wherein said ratio is approximately 2:1.
Claim 12
Dependent Claim
18 words
The superconductor junction of claim 6 wherein said ratio is in the range of about 1:1 to 4:1.
Claim 13
Dependent Claim
28 words
A superconductor junction comprising a supporting substrate having deposited thereon in succession (1) a Sn layer, (2) binary composition of Ge and Sn, and (3) a Sn layer.
Claim 14
Dependent Claim
28 words
A superconductor junction comprising a supporting substrate having deposited thereon in succession (1) a Sn layer, (2) binary composition of Ge and Sn, and (3) a Sn layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |