US5206216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fabricating oxide superconducting wires by laser ablation
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1991-09-16
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Granted: 1993-04-27
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Expires: 2011-09-16
Abstract
Abstract Disclosed herein is a method of and an apparatus for fabricating an oxide superconducting wire which comprises a tape-type long base material and an oxide superconducting film formed thereon. The oxide superconducting film is formed by laser ablation of applying a laser beam (2) onto a target (4) while translating a long base material (6) along its longitudinal direction and depositing atoms and/or molecules scattered from the target (4) on the base material (6).
Inventors
- 👤 Noriyuki Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:10
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/56; C23C14/562; C23C14/24; C23C14/28; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0521; H10N60/0801; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/73; Y10S505/732; Y10S505/742
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
A method of fabricating an oxide superconducting wire using laser ablation of applying a laser beam onto a target containing components of an oxide superconductive material and depositing particles thereby scattered from said target on a heated long base material, said method comprising the steps of: arranging a mask between said target and said long base material for limiting a film forming region; feeding said long base material along its longitudinal direction to be passed through a film forming station provided therein with said target; applying said laser beam onto said target thereby scattering particles from said target by laser ablation under an oxygen pressure of at least 300 mTorr; and depositing said particles on said limited film forming region of said long base material for forming an oxide superconducting film.
Claim 2
Independent Claim
131 words
A method of fabricating an oxide superconducting wire using laser ablation of applying a laser beam onto a target containing components of an oxide superconductive material and depositing particles thereby scattered from said target on a heated long base material, said method comprising the steps of: arranging a mask between said target and said long base material for limiting a film forming region; feeding said long base material along its longitudinal direction to be passed through a film forming station provided therein with said target; applying said laser beam onto said target thereby scattering particles from said target by laser ablation under an oxygen pressure of at least 300 mTorr; and depositing said particles on said limited film forming region of said long base material for forming an oxide superconducting film.
Claim 3
Dependent Claim
51 words
A method of fabricating an oxide superconducting wire in accordance with claim 1, further comprising the steps of cooling slowly said oxide superconducting film under a partial pressure of oxygen of at least about 100 mTorr higher than that in said film forming station after said step of oxide superconducting film.
Claim 4
Dependent Claim
35 words
A method of fabricating an oxide superconducting wire in accordance with claim 1, wherein said film forming station comprises a plurality of film forming stations distributed along a path for feeding said long base material.
Claim 5
Dependent Claim
38 words
A method of fabricating an oxide superconducting wire in accordance with claim 1, wherein said laser beam is emitted from a laser selected from the group consisting of an excimer laser, a nitrogen laser, and a YAG laser.
Claim 6
Dependent Claim
36 words
A method of fabricating an oxide superconducting wire in accordance with claim 1, wherein one of a zirconia ceramic tape and a metal tape of nickel or nickel group alloy is employed as said base material.
Claim 7
Dependent Claim
28 words
A method of fabricating an oxide superconducting wire in accordance with claim 1, wherein said target has one composition selected from the group of Y-Ba-Cu-O, Bi-Sr-Ca-Cu-O and Tl-Ba-Ca-Cu-O.
Claim 8
Dependent Claim
32 words
A method for fabricating an oxide superconducting wire in accordance with claim 1, wherein the 4th or 2nd harmonics laser beam emitted from a YAG laser is employed as said laser beam.
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) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |