US4589001A
Expired / Lapsed
US
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Quasiparticle injection control type superconducting device
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1984-04-26
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Granted: 1986-05-13
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Expires: 2004-04-26
Abstract
Abstract A quasiparticle control device including a Josephson junction element formed of a pair of superconductors joined to each other, with a weak link part intervening therebetween, and a third electrode provide on the weak link part. The characteristics of the Josephson junction of the Josephson junction element is controlled by injecting quasiparticles to the third electrode.
Inventors
- 👤 Shigeki Sakai
- 👤 Hiroshi Tateno
- 👤 Shoei Kataoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:15
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/10; H10N60/128; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/873; Y10S505/874
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A quasiparticle injection control type superconducting device, comprising: a Josephson junction element formed of a weak link part, a first superconductor joined to one surface of said weak link part and a second superconductor joined to the other surface of said weak link part; and quasiparticle injecting means provided on at least a portion of said weak link part excluding the portions thereof having said first and second superconductors joined thereto for injecting quasiparticles directly into said weak link part; whereby injection of quasiparticles causes the current-voltage characteristics of said Josephson element to be controlled.
Claim 2
Dependent Claim
95 words
A quasiparticle injection control type superconducting device, comprising: a Josephson junction element formed of a weak link part, a first superconductor joined to one surface of said weak link part and a second superconductor joined to the other surface of said weak link part; and quasiparticle injecting means provided on at least a portion of said weak link part excluding the portions thereof having said first and second superconductors joined thereto for injecting quasiparticles directly into said weak link part; whereby injection of quasiparticles causes the current-voltage characteristics of said Josephson element to be controlled.
Claim 3
Dependent Claim
22 words
A quasiparticle injection control type superconducting device according to claim 1, further comprising another quasiparticle injecting means provided on said first superconductor.
Claim 4
Dependent Claim
25 words
A quasiparticle injection control type superconducting device according to claim 1, further comprising quasiparticle injecting means provided one each on said first and second superconductors.
Claim 5
Dependent Claim
33 words
A quasiparticle injection control type superconducting device according to claim 1, wherein said quasiparticle injecting means comprises an insulating barrier and an electrode coupled to said weak link part through said insulating barrier.
Claim 6
Dependent Claim
33 words
A quasiparticle injection control type superconducting device according to claim 2, wherein said another quasiparticle injecting means comprises an insulating barrier and an electrode coupled to said first superconductor through said insulating barrier.
Claim 7
Dependent Claim
33 words
A quasiparticle injection control type superconducting device according to claim 3, wherein each of said quasiparticle injecting means comprises an insulating barrier and an electrode coupled to the superconductor through said insulating barrier.
Claim 8
Dependent Claim
24 words
A quasiparticle injection control type superconducting device according to claim 4, wherein said electrode is made of a normal metal, superconducting metal or semiconductor.
Claim 9
Dependent Claim
24 words
A quasiparticle injection control type superconducting device according to claim 5, wherein said elecrode is made of a normal metal, superconducting metal or semiconductor.
Claim 10
Dependent Claim
24 words
A quasiparticle injection control type superconducting device according to claim 6, wherein said electrode is made of a normal metal, superconducting metal or semiconductor.
Claim 11
Dependent Claim
19 words
A quasiparticle injection control type superconducting device according to claim 1, wherein said quasiparticle injecting means is a semiconductor.
Claim 12
Dependent Claim
20 words
A quasiparticle injection control type superconducting device according to claim 2, wherein said another quasiparticle injecting means is a semiconductor.
Claim 13
Dependent Claim
17 words
A quasiparticle injecting control type superconducting device according to claim 3, wherein said quasiparticle means are semiconductors.
References Cited (Backward Citations)
US4157555A
Cited
US4334158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |