Patent EP0328333A2 successfully refreshed from Google Patents.
EP0328333A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for producing ceramic superconductors
Assignee: Westinghouse Electric Corp
•
Filing: 1989-02-06
•
Granted: —
•
Expires: 2009-02-06
Abstract
Abstract Vapor deposition process for making barium and/or strontium containing ceramic superconductors utilizing vaporization of chelates of the metallic constituents of the superconductor at 150-350C to produce a composite vapor which can be mixed with an oxygen-containing gas for depositing a very homogeneous ceramic film on a heated substrate. This process attempts to solve the barium and/or strontium source material volatility problem which has generally prevented the chemical vapor deposition of such materials.
Inventors
- 👤 Robert George Charles
- 👤 Robert Mazelsky
- 👤 Dennis Norbert Schmidt
- 👤 William Sam Cifone
- 👤 John Robert Szedon
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 15:52
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0436; H10N60/0464
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
68 words
A process for producing ceramic superconductor containing barium and/or strontium characterized by: vaporizing chelates of metallic constituents of the superconductor at 150-350C, thereby producing a chelate composite vapor; mixing said chelate composite vapor with oxygen-containing gas to produce a gaseous chemical vapor deposition mixture; heating a substrate to from 350 to 650C; and contacting said gaseous chemical vapor deposition mixture to said substrate to produce a ceramic film.
Claim 2
Dependent Claim
68 words
A process for producing ceramic superconductor containing barium and/or strontium characterized by: vaporizing chelates of metallic constituents of the superconductor at 150-350C, thereby producing a chelate composite vapor; mixing said chelate composite vapor with oxygen-containing gas to produce a gaseous chemical vapor deposition mixture; heating a substrate to from 350 to 650C; and contacting said gaseous chemical vapor deposition mixture to said substrate to produce a ceramic film.
Claim 3
Dependent Claim
17 words
A process according to claim 1, characterized in that the substrate is a single crystal perovskite substrate.
Claim 4
Dependent Claim
22 words
A process according to claim 2, characterized in that the substrate is formed from or composed of a single crystal strontium titanate.
Claim 5
Dependent Claim
26 words
A process according to claim 1, 2 or 3, characterized in that the metallic constituents consist essentially of yttrium and copper plus and barium and/or strontium.
Claim 6
Dependent Claim
43 words
A process according to claim 1, 2, 3 or 4 characterized in that the chelates are vaporized in an inert carrier gas which transports said chelates to a position adjacent to the substrate where said chelates to a mixed with the oxygen-containing gas.
Claim 7
Dependent Claim
31 words
A process according to any of claims 1 to 5, characterized in that barium is one of the metallic constituents, and Bis [1,1,1,2,2,3,3,-heptafluoro-7,7- dimethyl-4,6-octanedionato] barium(II) is used as a barium chelate.
Claim 8
Dependent Claim
31 words
A process according to any of claims 1 to 6, characterized in that yttrium is one of the metallic constituents, and Tris [1,1,1,2,2,3 3,-heptafluoro-7,7-dimethyl-4,6-octanedionato] yttrium(III) is used as a yttrium chelate.
Claim 9
Dependent Claim
30 words
A process according to any of claims 1 to 7, characterized in that copper is one of the metallic constituents, and Bis [acetyl-acetoneimide] copper(II) is used as a copper chelate.
Claim 10
Dependent Claim
30 words
A process according to any of claims 1 to 8, characterized in that strontium is one of the metallic constituents, and Bis [1,1,1,2,2,3,3,-heptafluoro-7,7-dimethyl-4,6-octanedionato] strontium(II) is used as a strontium chelate.
Claim 11
Dependent Claim
32 words
A process according to any of claims 1 to 8, characterized in that the metallic components consist of yttrium, barium and copper, and fluorine is partially substituted for oxygen in the ceramic.
Claim 12
Dependent Claim
21 words
A process according to any of the preceding claims, characterized in that the substrate is heated to from 400 to 500C.
Claim 13
Dependent Claim
23 words
A process according to any of the preceding claims, characterized in that the ceramic film is post-baked at 400-650C in an oxygen atmosphere.
Claim 14
Dependent Claim
15 words
A process according to claim 1, characterized in that the substrate is an oriented-crystal substrate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.