US5143894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation and high resolution patterning of superconductors
Assignee: Individual
•
Filing: 1989-08-16
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Granted: 1992-09-01
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Expires: 2009-08-16
Abstract
Abstract A method is disclosed for forming a patterned oxide superconducting film wherein a selected region of a ternary metal oxide superconducting film is irradiated in a controlled atmosphere with photons so as to become non-superconductive.
Inventors
- 👤 Mordechai Rothschild
- 👤 Daniel J. Ehrlich
- 👤 Jerry G. Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:01
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0661; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/725; Y10S505/73; Y10S505/732; Y10S505/742
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A method of forming a superconductive pattern in a selected ternary metal oxide material, the method comprising: forming a film of superconductive material upon a substrate; and selectively irradiating regions of the film with photons in a predefined pattern to transform regions of the film from a superconducting state to a non-superconducting state by photothermally-induced material changes.
Claim 2
Independent Claim
57 words
A method of forming a superconductive pattern in a selected ternary metal oxide material, the method comprising: forming a film of superconductive material upon a substrate; and selectively irradiating regions of the film with photons in a predefined pattern to transform regions of the film from a superconducting state to a non-superconducting state by photothermally-induced material changes.
Claim 3
Dependent Claim
55 words
The method of claim 1 wherein the ternary metal oxide is a compound characterized by the formula MBa.sub.2 Cu.sub.3 O.sub.x where x falls in the range from approximately 6 to 9, and M is an element selected from the group consisting of Yttrium, Scandium, Lanthanum, Neodymium, Samarium, Europium, Gadolinium, Dysprosium, Holmium, Erbium, Ytterbium, and Lutetium.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein the step of irradiating regions of the film includes irradiating said regions with a laser in a direct write mode.
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein the step of irradiating regions of the film includes irradiating said regions with a laser in a mask projection mode.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein the step of irradiating regions of the film includes irradiating said regions with a laser in a contact printing mode.
Claim 7
Dependent Claim
26 words
The method of claim 1 wherein the step of irradiating regions of the film includes irradiating said regions with a lamp in a contact printing mode.
Claim 8
Dependent Claim
44 words
The method of claim 1 wherein the irradiating step includes selectively exposing regions of the film to a light beam from a laser, and the exposing step includes forming a mask on said film for selectively defining said regions prior to said irradiating step.
Claim 9
Dependent Claim
56 words
The method of claim 1 wherein the irradiating step includes selectively exposing regions of the film to a light beam from a laser, and wherein the exposing step includes interposing a mask between the laser and the film, focusing the light beam on the film, and directing the light beam through the mask to the film.
Claim 10
Dependent Claim
17 words
The method of claim 1 further comprises maintaining the deposited film in an oxygen-right atmosphere during irradiation.
Claim 11
Dependent Claim
17 words
The method of claim 1 further comprises maintaining the deposited film in an oxygen-deficient atmosphere during irradiation.
Claim 12
Dependent Claim
15 words
A superconducting device having a pattern formed in accordance with the method of claim 1.
Claim 13
Independent Claim
77 words
A method of producing a superconductive circuit comprising a superconduction phase showing superconductivity at a prescribed working temperature and a non-superconducting phase showing no superconductivity at a prescribed working temperature, said method comprising: a step of forming a film having said superconducting phase open a substrate; and a step of applying a laser beam to a part of superconducting phase on said film to cause transition of said part of said superconducting phase into said non-superconducting phase.
Claim 14
Independent Claim
77 words
A method of producing a superconductive circuit comprising a superconduction phase showing superconductivity at a prescribed working temperature and a non-superconducting phase showing no superconductivity at a prescribed working temperature, said method comprising: a step of forming a film having said superconducting phase open a substrate; and a step of applying a laser beam to a part of superconducting phase on said film to cause transition of said part of said superconducting phase into said non-superconducting phase.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |