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Patent US5712227A successfully refreshed from Google Patents.
US5712227A
Expired / Lapsed
US
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Substrate having a superconductor layer
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1995-01-25
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Granted: 1998-01-27
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Expires: 2015-01-25
Abstract
Abstract A substrate having a superconducting thin film of compound oxide thereon. An intermediate layer consists of at least one layer of copper-containing oxide is interposed between the substrate and the superconducting thin film.
Inventors
- 👤 Kenjiro Higaki
- 👤 Keizo Harada
- 👤 Takashi Matsuura
- 👤 Hitoshi Oyama
- 👤 Hideo Itozaki
- 👤 Shuji Yazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:58
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/52; C04B41/009; C04B41/50; C04B41/5072; C04B41/5074; C04B41/80; C04B41/81; C04B41/85; C04B41/89; C30; C30B; C30B23/00; C30B23/02; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/225; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0576; H10N60/0632; C04B2111/00; C04B2111/00474; C04B2111/00844; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
A composite comprising a single crystal substrate of MgO, a superconducting thin film of compound oxide and an intermediate layer which is interposed between and contacting the substrate and the oxide superconducting thin film, wherein said superconducting thin film of compound oxide has a composition represented by the formula: Bi.sub.4 (Sr.sub.1-x, Ca.sub.x).sub.m Cu.sub.n O.sub.p+y in which "x", "m", "n", "p" and "y" are numbers each satisfying ranges of 6≦m≦10, 4≦n≦8, 0<x<1 and -2≦y≦+2, respectively and p=(6+m+n), and said intermediate layer has a composition represented by a formula: Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-z in which "z" is a number satisfying a range of 0≦z<1, wherein said bismuth superconducting thin film is epitaxially deposited on said yttrium intermediate layer.
Claim 2
Dependent Claim
116 words
A composite comprising a single crystal substrate of MgO, a superconducting thin film of compound oxide and an intermediate layer which is interposed between and contacting the substrate and the oxide superconducting thin film, wherein said superconducting thin film of compound oxide has a composition represented by the formula: Bi.sub.4 (Sr.sub.1-x, Ca.sub.x).sub.m Cu.sub.n O.sub.p+y in which "x", "m", "n", "p" and "y" are numbers each satisfying ranges of 6≦m≦10, 4≦n≦8, 0<x<1 and -2≦y≦+2, respectively and p=(6+m+n), and said intermediate layer has a composition represented by a formula: Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-z in which "z" is a number satisfying a range of 0≦z<1, wherein said bismuth superconducting thin film is epitaxially deposited on said yttrium intermediate layer.
Claim 3
Dependent Claim
17 words
The composite of claim 1, wherein said intermediate layer has a perovskite or layered perovskite crystal structure.
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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) | 2001-01-26 | 2001-07-28 | 2002-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-01-26 | 2005-07-28 | 2006-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-01-26 | 2009-07-28 | 2010-01-27 | $7700.00 | Window Closed / Lapsed |