US4828931A
Expired / Lapsed
US
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Superconductor for magnetic field shielding
Assignee: Osaka Prefectural Government
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Filing: 1988-03-17
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Granted: 1989-05-09
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Expires: 2008-03-17
Abstract
Abstract A superconductor for magnetic field shielding comprising a substrate, at least one superconductor film layer, which is laminated on the substrate, and a plurality of small holes 2 which pass through the substrate and the superconductor film layer, wherein the thickness of the superconductor film layer is 100 μm or less. The superconductor of the present invention uses both superconductive shielding and electromagnetic shielding to deliver extremely high magnetic shielding performance.
Inventors
- 👤 Souichi Ogawa
- 👤 Takao Sugioka
- 👤 Masaru Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:35
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0075; H05K9/0077; H10; H10N; H10N60/00; H10N60/20; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10T; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12479; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12819; Y10T428/24; Y10T428/24273; Y10T428/24322
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
50 words
A superconductor for magnetic field shielding comprising a substrate, at least one superconductor film layer, which is laminated on said substrate, and a plurality of small holes which pass through said substrate and said superconductor film layer, wherein the thickness of said superconductor film layer is 100 μm or less.
Claim 2
Dependent Claim
50 words
A superconductor for magnetic field shielding comprising a substrate, at least one superconductor film layer, which is laminated on said substrate, and a plurality of small holes which pass through said substrate and said superconductor film layer, wherein the thickness of said superconductor film layer is 100 μm or less.
Claim 3
Dependent Claim
58 words
A superconductor for magnetic field shielding comprising a substrate, a plurality of superconductor film layers and metal layers laminated alternately on said substrate, and a plurality of small holes passing through the lamination, wherein the thickness of said superconductor film layer is 100 μm or less and the top layer of said lamination is said superconductor film layer.
Claim 4
Dependent Claim
58 words
A superconductor for magnetic field shielding comprising a substrate, a plurality of superconductor film layers and metal layers laminated alternately on said substrate, and a plurality of small holes passing through the lamination, wherein the thickness of said superconductor film layer is 100 μm or less and the top layer of said lamination is said superconductor film layer.
Claim 5
Dependent Claim
55 words
A superconductor for magnetic field shielding according to claim 1, wherein superconductor material is deposited on said substrate having a plurality of small through holes by a sputtering method or electron beam evaporation method so as to form said at least one superconductor film layer on said substrate surface except for said small hole sections.
Claim 6
Dependent Claim
54 words
A superconductor for magnetic field shielding according to claim 2, wherein superconductor material is deposited on said substrate having a plurality of small through holes by a sputtering method or electron beam evaporation method so as to form said plurality of superconductor film layers on said substrate surface except for said small hole sections.
Claim 7
Dependent Claim
61 words
A superconductor for magnetic field shielding according to claim 3, wherein metal material is deposited on one of said superconductor film layer and/or said substrate by a sputtering method or electron beam evaporation method so that each of said metal film layers is formed sandwiched between two of said superconductor film layers or between said substrate and said superconductor film layer.
Claim 8
Dependent Claim
60 words
A superconductor for magnetic field shielding according to claim 4, wherein metal material is deposited on one of said superconductor film layer and/or said substrate by a sputtering method or electron beam evaporation method so that each of said metal film layers is formed sandwiched between two said superconductor film layers or between said substrate and said superconductor film layer.
Claim 9
Dependent Claim
49 words
A superconductor for magnetic field shielding according to claim 1, 2, 3, 4, 5 or 6 wherein the area of said small hole is 3 cm 2 or less and the open area rate of the entire area of said substrate to said small holes is 90% or less.
Claim 10
Dependent Claim
47 words
A superconductor for magnetic field shielding according to claim 1, 2, 3, 4, 5 or 6 wherein said substrate is made of copper, aluminum, nickel, stainless steel, or organic high molecular material selected from the group consisting of polyester, polyphenylene sulfide, vinylidene chloride, polyimide or polyether sulfone.
Claim 11
Dependent Claim
34 words
A superconductor for magnetic field shielding according to claim 1, 2, 3, 4, 5, or 6, wherein said superconductor film layer is made of niobium, niobium compound, niobium alloy, vanadium compound or vanadium alloy.
Claim 12
Dependent Claim
26 words
A superconductor for magnetic field shielding according to claim 2, 4, 5, or 6, wherein said metal film layer is made of copper, aluminum or silver.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |