GB1441510A – Devices comprising josephson tunnelling junctions
– Google Patents
GB1441510A – Devices comprising josephson tunnelling junctions
– Google Patents
Devices comprising josephson tunnelling junctions
Info
Publication number
GB1441510A
GB1441510A
GB4497174A
GB4497174A
GB1441510A
GB 1441510 A
GB1441510 A
GB 1441510A
GB 4497174 A
GB4497174 A
GB 4497174A
GB 4497174 A
GB4497174 A
GB 4497174A
GB 1441510 A
GB1441510 A
GB 1441510A
Authority
GB
United Kingdom
Prior art keywords
junction
extension
electrodes
current
superconducting
Prior art date
1973-10-30
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4497174A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1973-10-30
Filing date
1974-10-17
Publication date
1976-07-07
1974-10-17
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp
1976-07-07
Publication of GB1441510A
publication
Critical
patent/GB1441510A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03K—PULSE TECHNIQUE
H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
H03K19/195—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using superconductive devices
H03K19/1952—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using superconductive devices with electro-magnetic coupling of the control current
H—ELECTRICITY
H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
H10N60/00—Superconducting devices
H10N60/10—Junction-based devices
H10N60/12—Josephson-effect devices
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S505/00—Superconductor technology: apparatus, material, process
Y10S505/825—Apparatus per se, device per se, or process of making or operating same
Y10S505/873—Active solid-state device
Y10S505/874—Active solid-state device with josephson junction, e.g. squid
Abstract
1441510 Superconductive devices INTERNATIONAL BUSINESS MACHINES CORP 17 Oct 1974 [30 Oct 1973] 44971/74 Heading H1K In a Josephson tunnelling junction having a plurality of control conductors and functioning as a logic gate, the junction electrodes are so constructed as to overcome the normal non- linear distribution of tunnelling current, this effect arising from the screening circulating current through the junction and its electrodes produced as an outcome of control conductor energization. With such a linear tunnelling current distribution each control conductor then produces the same effect on the logic gate for given operating conditions. In each of the arrangements described a superconducting ground plane is used although not illustrated. In a basic arrangement, Figs. 8 and 9, a tunnelling barrier 36 is provided between two rectangular superconducting electrodes 28, 30, each electrode being integral with a superconducting extension of lesser width. To provide the required linearity of junction current distribution, each rectangular electrode M2, M3 has a length l 1 , l 2 to the junction at least equal to the distance W1, W2 or W3, W4 at the root of the respective extension. In a modification a side entry extension is provided, Fig. 10, the conditions in this case being that l 1 is at least equal to W5. In an alternative arrangement, Fig. 12, electrode M3 is extended from the junction over the electrode M2 with an intermediate insulating layer I2, the extension length l e being at least equal to the junction width. A modification, Fig. 13, which uses two control electrodes 114, 116 has the extension provided in the form of a separate superconducting layer 118. Three control electrodes M4 are provided in Fig. 14 in which an extension superconducting layer is provided by overlap of M2 and M3. The Specification describes the effect of the circulating screening current and how this is overcome in detail, Figs. 1 to 7 (not shown), this current under normal conditions being concentrated along a restricted path on a superconductive surface below an energized control conductor but being distributed uniformly on the opposite surface.
GB4497174A
1973-10-30
1974-10-17
Devices comprising josephson tunnelling junctions
Expired
GB1441510A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US00411123A
US3848259A
(en)
1973-10-30
1973-10-30
Multicontrol logic gate design
Publications (1)
Publication Number
Publication Date
GB1441510A
true
GB1441510A
(en)
1976-07-07
Family
ID=23627660
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4497174A
Expired
GB1441510A
(en)
1973-10-30
1974-10-17
Devices comprising josephson tunnelling junctions
Country Status (8)
Country
Link
US
(1)
US3848259A
(en)
JP
(1)
JPS5622388B2
(en)
CA
(1)
CA1023871A
(en)
DE
(1)
DE2448050C2
(en)
FR
(1)
FR2249449B1
(en)
GB
(1)
GB1441510A
(en)
IT
(1)
IT1020149B
(en)
NL
(1)
NL7414137A
(en)
Families Citing this family (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CH624515A5
(en)
*
1976-09-09
1981-07-31
Mikhail Jurievich Kupriyanov
DE2848579C2
(en)
*
1977-11-25
1984-02-02
Petr Efimovič Kandyba
Layer cryotron
JPS57181887U
(en)
*
1981-05-15
1982-11-18
JPS5826102A
(en)
*
1981-08-07
1983-02-16
株式会社明電舎
Self-running type cutting machine
US5233244A
(en)
*
1991-03-25
1993-08-03
Fujitsu Limited
Josephson logic gate having a plurality of input ports and a josephson logic circuit that uses such a josephson logic gate
Family Cites Families (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3522492A
(en)
*
1967-10-23
1970-08-04
Texas Instruments Inc
Superconductive barrier devices
US3521133A
(en)
*
1967-11-24
1970-07-21
Ibm
Superconductive tunneling gate
GB1360100A
(en)
*
1970-12-31
1974-07-17
Ibm
Superconductive tunnelling device
US3764863A
(en)
*
1971-06-30
1973-10-09
Ibm
High gain josephson device
US3803459A
(en)
*
1971-10-27
1974-04-09
Gen Instrument Corp
Gain in a josephson junction
1973
1973-10-30
US
US00411123A
patent/US3848259A/en
not_active
Expired – Lifetime
1974
1974-07-25
FR
FR7426336A
patent/FR2249449B1/fr
not_active
Expired
1974-08-23
IT
IT26549/74A
patent/IT1020149B/en
active
1974-09-19
CA
CA209,646A
patent/CA1023871A/en
not_active
Expired
1974-10-09
DE
DE2448050A
patent/DE2448050C2/en
not_active
Expired
1974-10-16
JP
JP11832074A
patent/JPS5622388B2/ja
not_active
Expired
1974-10-17
GB
GB4497174A
patent/GB1441510A/en
not_active
Expired
1974-10-29
NL
NL7414137A
patent/NL7414137A/en
not_active
Application Discontinuation
Also Published As
Publication number
Publication date
US3848259A
(en)
1974-11-12
FR2249449A1
(en)
1975-05-23
DE2448050A1
(en)
1975-05-07
FR2249449B1
(en)
1976-10-22
NL7414137A
(en)
1975-05-02
CA1023871A
(en)
1978-01-03
DE2448050C2
(en)
1984-11-08
JPS5075792A
(en)
1975-06-21
JPS5622388B2
(en)
1981-05-25
IT1020149B
(en)
1977-12-20
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Legal Events
Date
Code
Title
Description
1976-11-17
PS
Patent sealed [section 19, patents act 1949]
1987-06-03
PCNP
Patent ceased through non-payment of renewal fee
