US5002928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming oxide superconducting films with an ultrasonic wave sprayer
Assignee: Tonen General Sekiyu KK
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Filing: 1989-11-09
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Granted: 1991-03-26
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Expires: 2009-11-09
Abstract
Abstract A thin film of a superconductor comprising composite metal oxides is formed by atomizing and spraying a homogeneous solution or solutions containing as solutes one or more of metal compounds capable of forming the superconductor, with an ultrasonic wave sprayer, onto a hot substrate to form the thin film, and the ultrasonic wave sprayer for forming the thin film of the superconductor comprises an ultrasonic wave-generating vibrator, feedstock supplier, atomized solution-escaping inhibitor, substrate supporter and heater, the ultrasonic wave-generating vibrator being connected through an axis to a solution-atomizing nozzle.
Inventors
- 👤 Keitaro Fukui
- 👤 Osamu Nakamura
- 👤 Yasushi Okayama
- 👤 Atsushi Tsunoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:45
CPC Classifications
B; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0607; B05B17/0623; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0324; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/734; Y10S505/737
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A method for forming a thin film of an oxide superconductor which comprises atomizing and spraying a homogeneous solution with a ultrasonic wave sprayer onto a substrate heated to a temperature of 200° to 950° C. to form an oxide film and then annealing said film, wherein said solution is selected from the group consisting of metal salts, metal halides, metal alkoxides and mixtures thereof capable of forming the superconductor.
Claim 2
Independent Claim
70 words
A method for forming a thin film of an oxide superconductor which comprises atomizing and spraying a homogeneous solution with a ultrasonic wave sprayer onto a substrate heated to a temperature of 200° to 950° C. to form an oxide film and then annealing said film, wherein said solution is selected from the group consisting of metal salts, metal halides, metal alkoxides and mixtures thereof capable of forming the superconductor.
Claim 3
Dependent Claim
17 words
The method according to claim 1, wherein the substrate is in a plane form or wire form.
Claim 4
Dependent Claim
18 words
The method according to claim 1, wherein said superconductor has a zero-resistance temperature of 58° K or higher.
Claim 5
Dependent Claim
18 words
The method according to claim 1, wherein said thin film has a thickness of 0.1 to 200 microns.
Claim 6
Dependent Claim
17 words
The method according to claim 1, wherein the atomizing and spraying is effected in a continuous manner.
Claim 7
Dependent Claim
22 words
The method according to claim 1, wherein said solution is atomized and sprayed at a flow rate of 0.1 to 100 ml/min.
Claim 8
Dependent Claim
21 words
The method according to claim 1, wherein the atomized solution has particle size in the range of 0.5 to 1,000 microns.
Claim 9
Dependent Claim
75 words
The method according to claim 1, wherein said metal salts, metal halides and metal alkoxides are selected from the group consisting of a bismuth compound, a thallium compound, a yttrium compound, a copper compound, an erbium compound, a strontium compound, a calcium compound, a barium compound, a samarium compound, a holmium compound, a lanthanum compound, a lutetium compound, a neodynium compound, a terbium compound, a ytterbium compound, and mixtures thereof capable of forming the superconductor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |