US4980339A
Expired / Lapsed
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Superconductor structure
Assignee: Panasonic Holdings Corp
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Filing: 1988-07-25
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Granted: 1990-12-25
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Expires: 2008-07-25
Abstract
Abstract A superconductor structure of very high performance is realized by forming a crystalline coating on a substrate of semiconductor, etc. and epitaxially depositing a crystalline superconductor film of good quality on this crystalline coating. Especially, CaF 2 crystal and ZrO 2 crystal of CaF 2 crystal structure have latice constants which match well with the substrate such as Si, GaAs, etc. and the superconductor. The crystalline coating may be a perovskite material such as BaTiO 3 when the superconductor is a perovskite material.
Inventors
- 👤 Kentaro Setsune
- 👤 Takeshi Kamada
- 👤 Hideaki Adachi
- 👤 Kiyotaka Wasa
- 👤 Takashi Hirao
- 👤 Osamu Yamazaki
- 👤 Hidetaka Higashino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:31
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0576; H10N60/0632; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/702; Y10S505/703; Y10S505/704
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
135 words
A superconductor structure comprising: a single crystal substrate made of at least one material selected from the group consisting of single crystals of Si, Ge, GaAs, GaN, GaP, InP, InAs, InSb, ZnS, ZnSe and CdS; a crystalline coating formed on said single crystal substrate and having a crystal structure selected from the group consisting of CaF 2 type crystal structure and perovskite type crystal structure; and a superconductor coating made of an oxide of a superconductor a--b--Cu--O system and formed on said crystalline coating wherein the atomic ratio of the elements satisfies ##EQU4## a is at least one species selected from the group consisting of Tl, Bi, Sc, Y and Lanthanide elements (atomic numbers 57-71), and b is at least one species selected from the group consisting of group IIa elements of the periodic table.
Claim 2
Dependent Claim
135 words
A superconductor structure comprising: a single crystal substrate made of at least one material selected from the group consisting of single crystals of Si, Ge, GaAs, GaN, GaP, InP, InAs, InSb, ZnS, ZnSe and CdS; a crystalline coating formed on said single crystal substrate and having a crystal structure selected from the group consisting of CaF 2 type crystal structure and perovskite type crystal structure; and a superconductor coating made of an oxide of a superconductor a--b--Cu--O system and formed on said crystalline coating wherein the atomic ratio of the elements satisfies ##EQU4## a is at least one species selected from the group consisting of Tl, Bi, Sc, Y and Lanthanide elements (atomic numbers 57-71), and b is at least one species selected from the group consisting of group IIa elements of the periodic table.
Claim 3
Dependent Claim
46 words
A superconductor structure according to claim 1, wherein said crystalline coating is made of at least one selected from the group consisting of CaF 2 , BaF 2 , SrF 2 , CaF 2 structure crystals and the compounds including at least one of these materials.
Claim 4
Dependent Claim
35 words
A superconductor structure according to claim 1, wherein said crystalline coating is made bTiO 3 where b is at least one species selected from the group consisting of group IIa elements of the periodic table.
Claim 5
Dependent Claim
42 words
A superconductor structure according to claim 1, wherein said crystalline coating is made of one selected from the group consisting of cNbO 3 and cTaO 3 where c is at least one selected from the group consisting of K, Na, and Ag.
Claim 6
Dependent Claim
17 words
A superconductor structure according to claim 1 wherein said crystalline coating is made of CdTiO 3 .
Claim 7
Dependent Claim
30 words
A superconductor structure according to claim 2, wherein said crystalline coating is made of one selected from the group consisting of ZrO 2 and the compounds including ZrO 2 .
Claim 8
Dependent Claim
58 words
A superconductor structure according to claim 6, wherein said crystalline coating is made of a stabilized compound of ZrO 2 stabilized by at least one of rare earth metal oxides such as Y 2 O 3 , Sm 2 O 3 , Gd 2 O 3 , La 2 O 3 , and Nd 2 O 3 .
Claim 9
Dependent Claim
37 words
A superconductor structure according to claim 6, wherein said crystalline coating is made of a stabilized compound of ZrO 2 stabilized by at least one selected from the group consisting of MgO, CaO and TiO 2 .
References Cited (Backward Citations)
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