US5196379A
Expired / Lapsed
US
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Method of depositing oxide passivation layers on high temperature superconductors
Assignee: Minneapolis University of
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Filing: 1991-11-21
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Granted: 1993-03-23
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Expires: 2011-11-21
Abstract
Abstract The present invention provides a method of depositing a passivation layer on the surface of a superconducting ceramic oxide wherein the passivation layer is a layer of an oxide of Al, Bi, Si or Al-W.
Inventors
- 👤 John H. Weaver
- 👤 Robert K. Grasselli
- 👤 David L. Nelson
- 👤 Harry M. Meyer, III
- 👤 Donald M. Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:02
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/0021; C23C14/06; C23C14/08; C23C14/087; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0661; H10N60/0716; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/725; Y10S505/73
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
59 words
A method comprising evaporating Al, Bi, Si or Al-W in an atmosphere of activated oxygen in the presence of a superconductive ceramic oxide surface so that a layer of an oxide of Al, Bi, Si or Al-W is applied to said surface, wherein said oxide layer is effective to passivate said superconductive oxide surface without disrupting the superconductive properties.
Claim 2
Independent Claim
59 words
A method comprising evaporating Al, Bi, Si or Al-W in an atmosphere of activated oxygen in the presence of a superconductive ceramic oxide surface so that a layer of an oxide of Al, Bi, Si or Al-W is applied to said surface, wherein said oxide layer is effective to passivate said superconductive oxide surface without disrupting the superconductive properties.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein said oxide passivation layer is applied to the surface of a 2-1-4 superconductive ceramic oxide.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein said oxide passivation layer is applied to the surface of a 1-2-3 superconductive ceramic oxide comprising Y.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said oxide passivation layer is applied to the surface of a 2-1-2-2 superconductive ceramic oxide comprising Bi.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein said oxide passivation layer is applied to the surface of a 2-1-2-2 superconductive ceramic oxide comprising Tl.
Claim 7
Dependent Claim
36 words
The method of claim 1 wherein said oxide passivation layer is applied to the surface of a superconductive ceramic oxide of the formula RBa 2 Cu 3 O 7-x , wherein R is a lanthenide element.
Claim 8
Dependent Claim
16 words
The method of claim 1 wherein the layer is at least about 50 Å in thickness.
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) | 1996-03-22 | 1996-09-21 | 1997-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-22 | 2000-09-21 | 2001-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-22 | 2004-09-21 | 2005-03-23 | $7700.00 | Window Closed / Lapsed |