US4800253A
Expired / Lapsed
US
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Electrical devices containing conductive polymers
Assignee: Tyco International Ltd Bermuda
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Filing: 1987-08-25
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Granted: 1989-01-24
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Expires: 2007-08-25
Abstract
Abstract Electrical devices which comprise at least one metal electrode and a conductive polymer element in contact therewith, wherein the metal surface which contacts the conductive polymer has a roughened or otherwise treated surface to improve its adhesion to the conductive polymer. The metal electrode is preferably an electrodeposited foil or a solid or stranded wire having an electrodeposited coating thereon. The conductive polymer preferably exhibits PTC behavior. The devices include heaters and circuit protection devices. The improved adhesion results in improved physical and electrical stability, and broadens the range of conductive polymer compositions which can be used in a number of applications.
Inventors
- 👤 Lothar Kleiner
- 👤 Martin Matthiesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:51
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/02; B; B01; B01D; B01D35/00; B01D35/06; H01C1/00; H01C1/14; H01C1/1406; H01C7/027; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
50 words
An electrical device which comprises (1) an element composed of a conductive polymer, and (2) at leat one metal electrode having a microrough surface which (i) comprises nickel, (ii) is in direct physical contact with the conductive polymer element, and (iii) has a surface comprising at least 50 percent macronodules.
Claim 2
Dependent Claim
50 words
An electrical device which comprises (1) an element composed of a conductive polymer, and (2) at leat one metal electrode having a microrough surface which (i) comprises nickel, (ii) is in direct physical contact with the conductive polymer element, and (iii) has a surface comprising at least 50 percent macronodules.
Claim 3
Dependent Claim
14 words
A device according to claim 1 wherein the electrode is an electrodeposited nickel foil.
Claim 4
Dependent Claim
21 words
A device according to claim 1 wherein the electrode has been prepared by a nickel treatment of an electrodeposited copper foil.
Claim 5
Dependent Claim
13 words
A device according to claim 1 wherein the conductive polymer exhibits PTC behavior.
Claim 6
Dependent Claim
15 words
A device according to claim 1 wherein the conductive polymer is based on a polyolefin.
Claim 7
Dependent Claim
43 words
A device according to claim 1 wherein the microrough surface has irregularities which (i) protrude from the surface by a distance of 0.1 to 100 microns and (ii) have at least one dimension parallel to the surface which is at most 100 microns.
Claim 8
Dependent Claim
40 words
A device according to claim 1 wherein the macronodules (i) have one dimension parallel to the surface which is at most 25 microns, and (ii) comprise micronodules having one dimension parallel to the surface which is at most 2 microns.
Claim 9
Dependent Claim
40 words
A device according to claim 7 wherein the macronodules (i) have one dimension parallel to the surface which is at most 15 microns and (ii) comprise micronodules having one dimension parallel to the surface which is 0.5 to 2 microns.
Claim 10
Dependent Claim
16 words
A device according to claim 7 wherein the microrough surface comprises at least 80 percent macronodules.
Claim 11
Dependent Claim
125 words
An electrical device which comprises (1) a laminar element which is composed of a conductive polymer, (2) a first electrodeposited metal foil electrode which is in direct physical contact with one surface of the conductive polymer element, and (3) a second electrodeposited metal foil electrode which is secured to the other surface of the conductive polymer element, each of said electrodes having a microrough surface which (i) is compose of nickel, (ii) is in direct physical contact with the conductive polymer element, (iii) has irregularities which protrude from the surface by a distance of 0.1 to 100 microns and have at least one dimension parallel to the surface which is at most 100 microns, and (iv) has a surface comprising at least 60 percent macronodules.
Claim 12
Dependent Claim
125 words
An electrical device which comprises (1) a laminar element which is composed of a conductive polymer, (2) a first electrodeposited metal foil electrode which is in direct physical contact with one surface of the conductive polymer element, and (3) a second electrodeposited metal foil electrode which is secured to the other surface of the conductive polymer element, each of said electrodes having a microrough surface which (i) is compose of nickel, (ii) is in direct physical contact with the conductive polymer element, (iii) has irregularities which protrude from the surface by a distance of 0.1 to 100 microns and have at least one dimension parallel to the surface which is at most 100 microns, and (iv) has a surface comprising at least 60 percent macronodules.
Claim 13
Dependent Claim
31 words
A device according to claim 10 which is a circuit protection device having a resistance of less than 100 ohms at room temperature and wherein the conductive polymer exhibits PTC behavior.
Claim 14
Dependent Claim
22 words
A device according to claim 10 which is a self-regulating heater having a total surface area of at least 1.0 square inch.
Claim 15
Dependent Claim
18 words
A device according to claim 10 which is a heater and wherein the conductive polymer exhibits ZTC behavior.
Claim 16
Dependent Claim
16 words
A device according to claim 10 wherein each of the electrodes is an electrodeposited nickel foil.
Claim 17
Dependent Claim
23 words
A device according to claim 10 wherein each of the electrodes has been prepared by a nickel treatment of an electrodeposited copper foil.
Claim 18
Dependent Claim
50 words
A device according to claim 10 wherein each of the microrough surfaces comprises at least 80% of macronodules which (i) have one dimension parallel to the surface which is at most 25 microns and (ii) comprise micronodules having one dimension parallel to the surface which is at most 2 microns.
Claim 19
Dependent Claim
48 words
A device according to claim 16 wherein each of the microrough surfaces consists essentially of macronodules which (i) have one dimension parallel to the surface which is at most 15 microns and (ii) comprise micronodules having one dimension parallel to the surface which is 0.5 to 2 microns.
References Cited (Backward Citations)
US2740732A
Cited
US3061501A
Cited
US3220897A
Cited
US3353124A
Cited
US3410984A
Cited
US3654533A
Cited
US3861029A
Cited
US4334148A
Cited
US4177376A
Cited
JPS5544446B2
Cited
US4426339B1
Cited
US4426339A
Cited
US4190878A
Cited
US4237441A
Cited
US4315237A
Cited
US4305111A
Cited
US4444708A
Cited
US4341949A
Cited
DE2939470A1
Cited
US4544828A
Cited
US4413301A
Cited
US4484252A
Cited
US4454379A
Cited
US4459473A
Cited
EP0144187A1
Cited
EP0158410A1
Cited
US4689475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |