US4988674A
Expired / Lapsed
US
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Electrically conductive articles and processes for their fabrication
Assignee: Eastman Kodak Co
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Filing: 1989-02-09
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Granted: 1991-01-29
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Expires: 2009-02-09
Abstract
Abstract A flexible electrically conductive article is disclosed comprised of an organic film, a conductive crystalline cuprate layer, and a release layer that together form a flexible electrically conductive assembly. The article is prepared by forming a conductive cuprate layer on a refractory substrate with the release interposed. After the cuprate layer is formed, the organic film is bonded to it, permitting the cuprate layer to be stripped intact from the substrate with the organic film. A crystal growth accelerating agent can be associated with the cuprate layer during its formation to minimize the heat energy required for crystallization.
Inventors
- 👤 Jose M. Mir
- 👤 Liang-Sun Hung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:12
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0801; H10N60/0296; H10N60/0576; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/702; Y10S505/703; Y10S505/704; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
107 words
An article comprised of a refractory substrate, a flexible electrically conductive crystalline cuprate layer, a release layer interposed between said flexible conductive cuprate layer and said substrate, said release layer being comprised of at least one of the metals of groups 8 to 11 and periods 5 and 6 of the periodic table of elements, a flexible organic film, and means for adhesively bonding said flexible organic film to said flexible conductive cuprate layer, so that said release layer, said flexible conductive cuprate layer, said adhesive bonding means and said flexible organic film can be stripped from said refractory substrate to form a flexible electrically conductive article.
Claim 2
Dependent Claim
107 words
An article comprised of a refractory substrate, a flexible electrically conductive crystalline cuprate layer, a release layer interposed between said flexible conductive cuprate layer and said substrate, said release layer being comprised of at least one of the metals of groups 8 to 11 and periods 5 and 6 of the periodic table of elements, a flexible organic film, and means for adhesively bonding said flexible organic film to said flexible conductive cuprate layer, so that said release layer, said flexible conductive cuprate layer, said adhesive bonding means and said flexible organic film can be stripped from said refractory substrate to form a flexible electrically conductive article.
Claim 3
Dependent Claim
20 words
An article according to claim 1 in which said cuprate layer is superconductive at temperatures in excess of 30° K.
Claim 4
Dependent Claim
18 words
An article according to claim 1 in which said cuprate layer is less than 25 μm in thickness.
Claim 5
Dependent Claim
23 words
An article according to claim 3 in which said cuprate layer is in the range of from 0.1 to 10 μm in thickness.
Claim 6
Dependent Claim
23 words
An article according to claim 4 in which said cuprate layer is in the range of from 0.5 to 5 μm in thickness.
Claim 7
Dependent Claim
14 words
An article according to claim 1 in which said release layer is electrically conductive.
Claim 8
Dependent Claim
18 words
An article according to claim 1 in which said release layer is at least 0.6 μm in thickness.
Claim 9
Dependent Claim
19 words
An article according to claim 7 in which said release layer is from 0.8 to 2 μm in thickness.
Claim 10
Dependent Claim
15 words
An article according to claim 1 in which said release layer is comprised of gold.
Claim 11
Dependent Claim
15 words
An article according to claim 9 in which said release layer consists essentially of gold.
Claim 12
Dependent Claim
28 words
An article according to claim 1 in which said release layer is comprised of at least one platinum metal chosen from the light and heavy platinum metal triads.
Claim 13
Dependent Claim
17 words
An article according to claim 11 in which said release layer is comprised of platinum or osmium.
Claim 14
Dependent Claim
15 words
An article according to claim 1 in which said release layer is comprised of silver.
Claim 15
Dependent Claim
64 words
A flexible electrically conductive article comprised of a flexible organic film, an electrically conductive crystalline cuprate layer, means for adhesively bonding said flexible organic film to said conductive cuprate layer, and a metal layer comprised of at least one of the metals of groups 8 to 11 and periods 5 and 6 of the periodic table of elements in contact with said cuprate layer.
Claim 16
Dependent Claim
64 words
A flexible electrically conductive article comprised of a flexible organic film, an electrically conductive crystalline cuprate layer, means for adhesively bonding said flexible organic film to said conductive cuprate layer, and a metal layer comprised of at least one of the metals of groups 8 to 11 and periods 5 and 6 of the periodic table of elements in contact with said cuprate layer.
Claim 17
Dependent Claim
20 words
An article according to claim 14 in which said cuprate layer is superconductive at temperatures in excess of 30° K.
Claim 18
Dependent Claim
18 words
An article according to claim 14 in which said cuprate layer is less than 25 μm in thickness.
Claim 19
Dependent Claim
23 words
An article according to claim 16 in which said cuprate layer is in the range of from 0.1 to 10 μm in thickness.
Claim 20
Dependent Claim
22 words
An article according to claim 17 in which said cuprate layer is in the range of from 0.5 to 5 μin thickness.
Claim 21
Dependent Claim
14 words
An article according to claim 14 in which said release layer is electrically conductive.
Claim 22
Dependent Claim
18 words
An article according to claim 14 in which said release layer is at least 0.6 μm in thickness.
Claim 23
Dependent Claim
19 words
An article according to claim 16 in which said release layer is from 0.8 to 2 μm in thickness.
Claim 24
Dependent Claim
15 words
An article according to claim 14 in which said release layer is comprised of gold.
Claim 25
Dependent Claim
15 words
An article according to claim 22 in which said release layer consists essentially of gold.
Claim 26
Dependent Claim
28 words
An article according to claim 14 in which said release layer is comprised of at least one platinum metal chosen from the light and heavy platinum metal triads.
Claim 27
Dependent Claim
17 words
An article according to claim 24 in which said release layer is comprised of platinum or osmium.
Claim 28
Dependent Claim
15 words
An article according to claim 14 in which said release layer is comprised of silver.
Claim 29
Independent Claim
99 words
A method of forming an electrically conductive article comprised of a support and an electrically conductive crystalline cuprate layer, including the steps of providing a refractory substrate and forming the electrically conductive crystalline cuprate layer on the substrate, characterized in that a release layer is formed on the refractory substrate, the cuprate layer is formed on the release layer, an organic film support is bonded to the cuprate layer, and the release layer, the cuprate layer, and the organic film support are formed to constitute a flexible electrically conductive article when stripped as a unit from the refractory substrate.
Claim 30
Independent Claim
99 words
A method of forming an electrically conductive article comprised of a support and an electrically conductive crystalline cuprate layer, including the steps of providing a refractory substrate and forming the electrically conductive crystalline cuprate layer on the substrate, characterized in that a release layer is formed on the refractory substrate, the cuprate layer is formed on the release layer, an organic film support is bonded to the cuprate layer, and the release layer, the cuprate layer, and the organic film support are formed to constitute a flexible electrically conductive article when stripped as a unit from the refractory substrate.
Claim 31
Dependent Claim
21 words
A method according to claim 27 further characterized in that a crystal growth accelerating agent is associated with the cuprate layer.
Claim 32
Dependent Claim
31 words
A method according to claim 28 further characterized in that the release layer is formed with the crystal growth accelerating agent forming a surface layer in contact with the cuprate layer.
Claim 33
Dependent Claim
21 words
A method according to claim 19 further characterized in that the surface layer of the release layer is a silver layer.
Claim 34
Dependent Claim
32 words
A method according to claim 27 further characterized in that the organic film, the cuprate layer, and the release layer are stripped from the substrate to produce the flexible electrically conductive article.
Claim 35
Dependent Claim
26 words
A method according to claim 27 further characterized in that the refractory substrate is chosen to provide a cylindrical surface for receipt of the release layer.
Claim 36
Dependent Claim
47 words
A method according to claim 32 further characterized in that the release and conductive cuprate layers and the organic film are formed as annuli on the cylindrical surface of the refractory substrate and are helically skived to facilitate stripping as an elongated continuous flexible electrically conductive article.
Claim 37
Dependent Claim
22 words
A method according to claim 33 further characterized in that a protective member is brought into contact with the continuous flexible article.
Claim 38
Independent Claim
134 words
A method of forming an electrically conductive article comprised of a support and an electrically conductive crystalline cuprate layer, including the steps of providing a refractory substrate and forming an electrically conductive crystalline cuprate layer on the substrate, characterized in that a gold layer is formed on the refractory substrate, a silver layer of from 0.1 to 1.0 μm in thickness is formed on the gold layer, a precursor of the conductive crystalline cuprate layer is formed on the silver layer, the precursor is heated to form the conductive crystalline cuprate layer, a flexible organic film is bonded to the conductive crystalline cuprate layer, and the gold layer, the conductive crystalline cuprate layer, and the flexible organic film are stripped as a unit from the refractory substrate to provide a flexible electrically conductive article.
Claim 39
Independent Claim
134 words
A method of forming an electrically conductive article comprised of a support and an electrically conductive crystalline cuprate layer, including the steps of providing a refractory substrate and forming an electrically conductive crystalline cuprate layer on the substrate, characterized in that a gold layer is formed on the refractory substrate, a silver layer of from 0.1 to 1.0 μm in thickness is formed on the gold layer, a precursor of the conductive crystalline cuprate layer is formed on the silver layer, the precursor is heated to form the conductive crystalline cuprate layer, a flexible organic film is bonded to the conductive crystalline cuprate layer, and the gold layer, the conductive crystalline cuprate layer, and the flexible organic film are stripped as a unit from the refractory substrate to provide a flexible electrically conductive article.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |