US5447908A
Expired / Lapsed
US
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Superconducting thin film and a method for preparing the same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1994-08-15
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Granted: 1995-09-05
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Expires: 2014-08-15
Abstract
Abstract An outer surface of a superconducting thin film of compound oxide such as YBa2Cu3O7- delta deposited on a substrate such as MgO and SrTiO3 is protected with a protective layer which is composed of amorphous inorganic material such as inorganic glass, amorphous oxide.
Inventors
- 👤 Hideo Itozaki
- 👤 Saburo Tanaka
- 👤 Nobuhiko Fujita
- 👤 Shuji Yazu
- 👤 Tetsuji Jodai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:30
CPC Classifications
B; B82; B82Y; B82Y20/00; H; H01; H01S; H01S5/00; H01S5/30; H01S5/34; H10; H10D; H10D62/00; H10D62/80; H10D62/81; H10D62/815; H10D62/8171; H10F; H10F77/00; H10F77/10; H10F77/14; H10F77/146; H10F77/1468; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/811; H10H20/812; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0408; H10N60/0576; H10N60/0632; H10N60/0661; H10N60/0716; H01S5/305; H01S5/3408; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/702
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
213 words
A superconducting thin film of compound oxide deposited on a substrate of single crystal of MgO or single crystal of SrTiO 3 , quartz or sapphire, characterized in that said compound oxide is selected from the group consisting of oxides having the formulae: Y 1 Ba 2 Cu 3 O 7-x , Ho 1 ,Ba 2 Cu 3 O 7-x , Lu 1 Ba 2 Cu 3 O 7-x , Sm 1 Ba 2 Cu 3 O 7-x , Nd 1 Ba 2 Cu 3 O 7-x , Gd 1 Ba 2 Cu 3 O 7-x , Eu 1 Ba 2 Cu 3 O 7-x , Er 1 Ba 2 Cu 3 O 7-x , Dy 1 Ba 2 Cu 3 O 7-x , Tm 1 Ba 2 Cu 3 O 7-x , Yb 1 Ba 2 Cu 3 O 7-x , and La 1 Ba 2 Cu 3 O 7-x , in which x is a number which satisfies a range of 0<x<1, and in that an outer surface of said superconducting thin film is covered with a protective layer which is made of amorphous inorganic material selected from the group consisting of amorphous silicon nitride, amorphous silicon carbide, amorphous aluminum nitride, amorphous titanium nitride, amorphous boron nitride and amorphous titanium carbide.
Claim 2
Dependent Claim
213 words
A superconducting thin film of compound oxide deposited on a substrate of single crystal of MgO or single crystal of SrTiO 3 , quartz or sapphire, characterized in that said compound oxide is selected from the group consisting of oxides having the formulae: Y 1 Ba 2 Cu 3 O 7-x , Ho 1 ,Ba 2 Cu 3 O 7-x , Lu 1 Ba 2 Cu 3 O 7-x , Sm 1 Ba 2 Cu 3 O 7-x , Nd 1 Ba 2 Cu 3 O 7-x , Gd 1 Ba 2 Cu 3 O 7-x , Eu 1 Ba 2 Cu 3 O 7-x , Er 1 Ba 2 Cu 3 O 7-x , Dy 1 Ba 2 Cu 3 O 7-x , Tm 1 Ba 2 Cu 3 O 7-x , Yb 1 Ba 2 Cu 3 O 7-x , and La 1 Ba 2 Cu 3 O 7-x , in which x is a number which satisfies a range of 0<x<1, and in that an outer surface of said superconducting thin film is covered with a protective layer which is made of amorphous inorganic material selected from the group consisting of amorphous silicon nitride, amorphous silicon carbide, amorphous aluminum nitride, amorphous titanium nitride, amorphous boron nitride and amorphous titanium carbide.
Claim 3
Dependent Claim
20 words
The superconducting thin film set forth in claim 1, wherein said superconducting thin film has a crystal structure of perovskite.
References Cited (Backward Citations)
US3932315A
Cited
JPS5897880A
Cited
JPS60173885A
Cited
US4692385A
Cited
US4753856A
Cited
US4826808A
Cited
US5266815A
Cited
US4970197A
Cited
US4996185A
Cited
WO1989000343A1
Cited
US4965247A
Cited
US4956335A
Cited
WO1990003265A1
Cited
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