Patent US4942142A successfully refreshed from Google Patents.
US4942142A
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Superconducting thin film and a method for preparing the same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1988-07-27
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Granted: 1990-07-17
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Expires: 2008-07-27
Abstract
Abstract An outer surface of a superconducting thin film of compound oxide such as YBa 2 Cu 3 O 7- δ deposited on a substrate such as MgO and SrTiO 3 is protected with a protective layer which is composed of polymer compound such as polyimide, silicon resin or epoxy resin.
Inventors
- 👤 Hideo Itozaki
- 👤 Saburo Tanaka
- 👤 Nobuhiko Fujita
- 👤 Shuji Yazu
- 👤 Tetsuji Jodai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:14
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0381; H10N60/0408; H10N60/0661; H10N60/0716; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/702; Y10S505/703; Y10S505/704; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31652; Y10T428/31663; Y10T428/31721
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
50 words
A superconducting thin film composed of high temperature compound oxide deposited on a substrate, characterized in that an outer surface of the superconducting thin film is covered with a protective layer which is composed of polymer compound selected from the group consisting of silicon resins, epoxy resins and polyimide resins.
Claim 2
Dependent Claim
50 words
A superconducting thin film composed of high temperature compound oxide deposited on a substrate, characterized in that an outer surface of the superconducting thin film is covered with a protective layer which is composed of polymer compound selected from the group consisting of silicon resins, epoxy resins and polyimide resins.
Claim 3
Dependent Claim
74 words
A superconducting thin film set forth in claim 1, characterized in that said superconducting thin film is a thin film of compound oxide composed of at least one element α selected from IIa group of the Periodic Table, at least one element β selected from IIIa group of the Periodic Table, at least one element γ selected from a group comprising Ib, IIb, IIIb, IVb and VIIIa group of the Periodic Table and oxygen.
Claim 4
Dependent Claim
91 words
A superconducting thin film set forth in claim 2, characterized in that said superconducting thin film is a thin film of compound oxide represented by the formula: (α.sub.1-x β.sub.x)Cu.sub.y O.sub.z in which α and β means the same definition as above, x is an atomic ratio of β with respect to (α+β) and has a range of 0.1≦x≦0.9, and y and z are respective atomic ratios with respect to (α 1-x β x ) which is considered to be equal to 1 and each satisfy ranges of 0.4≦y≦3.0 and 1≦z≦5 respectively.
Claim 5
Dependent Claim
44 words
A superconducting thin film set forth in claim 3, characterized in that said element α is Ba and said element β is at least one element selected from a group comprising Y, La, Gd, Dy, Ho, Er, Tm, Yb, Nd, Sm, Eu and Lu.
Claim 6
Dependent Claim
38 words
A superconducting thin film set forth in claim 3, characterized in that said compound oxide contains Ba, Y, Cu and at least one of element selected from a group comprising Al, Fe, Co, Ni, Zn, Ag and Ti.
Claim 7
Dependent Claim
38 words
A superconducting thin film set forth in claim 3, characterized in that said compound oxide contains Ba, La, Cu and at least one of element selected from a group comprising Al, Fe, Co, Ni, Zn, Ag and Ti.
Claim 8
Dependent Claim
38 words
A superconducting thin film set forth in claim 3, characterized in that said compound oxide contains Sr, La, Cu and at least one of element selected from a group comprising Al, Fe, Co, Ni, Zn, Ag and Ti.
Claim 9
Dependent Claim
24 words
A superconducting thin film set forth in claim 2, characterized in that said superconducting thin film has perovskite type or quasi-pervoskite type crystal structure.
Claim 10
Dependent Claim
91 words
A superconducting thin film set forth in claim 1, characterized in that said superconducting thin film is a thin film of compound oxide represented by the formula: Θ.sub.4 (Φ.sub.1-q, Ca.sub.q).sub.m Cu.sub.n O.sub.p+r in which Θ stands for Bi or Tl, Φ stands for Sr when Θ is Bi and stands for Ba when Θ is Tl, m and n are numbers each satisfying ranges of 6≦m≦10 and 4≦n≦8 respectively, p=(6+m+n), q is a number which satisfies a range of 0<q<1, and r is a number which satisfies a range of -2≦r≦+2.
Claim 11
Dependent Claim
26 words
A superconducting thin film set forth in claim 1, characterized in that said substrate is made of glass, quartz, silicon, sapphire, stainless steel or other ceramics.
Claim 12
Dependent Claim
24 words
A superconducting thin film set forth in claim 10, characterized in that said substrate is a single crystal of MgO or SrTiO 3 .
Claim 13
Dependent Claim
35 words
A superconducting thin film set forth in claim 11, characterized in that said superconducting thin film is deposited on a {001} plane or {110} plane of a single crystal of MgO or SrTiO 3 .
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |