Patent US4011574A successfully refreshed from Google Patents.
US4011574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Junction arrays for superconducting and nonsuperconducting application
Assignee: United States Department of the Air Force
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Filing: 1975-08-12
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Granted: 1977-03-08
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Expires: 1995-08-12
Abstract
Abstract An article and method for fabricating one and two dimensional arrays of superconducting and normal junctions by depositing metal films on photoresist gratings. In one mode superconducting Josephson junction arrays of the Dayem bridge type are fabricated by scratching a groove across the grating with a sharp diamond point.
Inventors
- 👤 Shyh Wang
- 👤 Won-Tien Tsang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:58
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: 8
Claim 1
Independent Claim
71 words
A superconduction junction array device comprising: a substrate base; a photoresist material covering one side of said base, said resist having a series of closely spaced, parallel groves and ridges on its open face; a superconducting metallic coating covering said photo-resist material, and a first score mark transverse to said ridges and cutting through one ridge removing the said metallic coating from the ridge but not from the groove adjacent thereto.
Claim 2
Dependent Claim
71 words
A superconduction junction array device comprising: a substrate base; a photoresist material covering one side of said base, said resist having a series of closely spaced, parallel groves and ridges on its open face; a superconducting metallic coating covering said photo-resist material, and a first score mark transverse to said ridges and cutting through one ridge removing the said metallic coating from the ridge but not from the groove adjacent thereto.
Claim 3
Dependent Claim
21 words
A superconduction junction array semiconductor device according to claim 1 further including a score mark cutting through a plurality of ridges.
Claim 4
Dependent Claim
24 words
A superconduction junction array semiconductor device according to claim 2 further including a plurality of parallel score marks cutting through a plurality of ridges.
Claim 5
Dependent Claim
26 words
A super-conduction junction array semiconductor device according to claim 1 including, a second score mark parallel to said ridges, cutting through said metallic coating and photoresist.
Claim 6
Dependent Claim
33 words
A superconduction junction array semiconductor device according to claim 4 including a plurality of first and second score marks as to form a series of independent semiconductor junction devices on the same substrate.
Claim 7
Independent Claim
83 words
A method of making super-conduction junction array semiconductor devices comprising the steps of: coating a substrate with photo resist material; forming a very fine diffraction grating on the surface of said photo resist by the optical interference of two laser beams; coating the grating surface with a metallic film capable of superconductivity, and scoring the grating, transverse to the direction of the lines in the grating, sufficiently to remove the metal film on the ridges but not from the grooves of the grating.
Claim 8
Independent Claim
83 words
A method of making super-conduction junction array semiconductor devices comprising the steps of: coating a substrate with photo resist material; forming a very fine diffraction grating on the surface of said photo resist by the optical interference of two laser beams; coating the grating surface with a metallic film capable of superconductivity, and scoring the grating, transverse to the direction of the lines in the grating, sufficiently to remove the metal film on the ridges but not from the grooves of the grating.
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) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |