Patent EP0073555A2 successfully refreshed from Google Patents.
EP0073555A2
Expired / Lapsed
EP
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Metallized capacitor with improved bilayer electrodes
Assignee: Bolmet Inc
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Filing: 1982-05-25
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Granted: —
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Expires: 2002-05-25
Abstract
Abstract This invention relates to a metallized electrode for a metallized capacitor which includes a base layer of a barrier or sacrificial metal or non-metal to minimize electrode erosion.
Inventors
- 👤 Angelo Yializis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 11:16
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
122 words
(l) An electrical capacitor comprising a pair of spaced electrodes and a dielectric material strip therebetween, where the voltage rating of said capacitor imposes a stress on said dielectric of greater than about 1000 volts per mil thickness, at least one of said electrodes comprises a composite metal coating, said composite metal coating comprising a first metal layer on said dielectric strip, and a second metal layer on said strip, the first metal layer having a thickness in the range of 4 to 7 ohms per square, the second metal being different from the first metal with a thickness less than about 10 10 ohms per square, the second metal layer having a higher melting point than the said first metal layer.
Claim 2
Dependent Claim
16 words
(2) The invention as recited in Claim 1 wherein said metal layers are adjacent each other.
Claim 3
Dependent Claim
16 words
(3) The invention as recited in Claim 1, wherein said second metal covers said first metal.
Claim 4
Dependent Claim
16 words
(4) The invention as recited in Claim 1 wherein said dielectric strip is a synthetic resin.-
Claim 5
Dependent Claim
14 words
(5) The invention as recited in Claim 2 wherein said dielectric strip comprises polypropylene.
Claim 6
Dependent Claim
20 words
2 (6) The invention as recited in-Claim 1 wherein one of said first and said second metal layers comprise aluminum.
Claim 7
Dependent Claim
15 words
(7) The invention as recited in Claim 1 wherein said first metal layer comprises aluminum.
Claim 8
Dependent Claim
15 words
(8) The invention as recited in Claim 1 wherein said second metal layer comprises aluminum.
Claim 9
Dependent Claim
23 words
(9) The invention as recited in Claim 1 wherein said second metal is taken from the class consisting essentially of iron, nickel, chromium.
Claim 10
Dependent Claim
32 words
(10) The invention as recited in Claim 9 wherein said first metal is a high purity aluminum vapor deposited on a polypropylene resin strip, and said second metal is vapor deposited iron.
Claim 11
Dependent Claim
14 words
(11) The invention as recited in Claim 9 wherein said second metal comprises iron.
Claim 12
Dependent Claim
14 words
(12) The invention as recited in Claim 9 wherein said second metal comprises nickel..
Claim 13
Dependent Claim
14 words
(13) The invention as recited in Claim 9 wherein said second metal contains chromium.
Claim 14
Dependent Claim
15 words
(14) The invention as recited,in Claim 9 wherein said second metal layer is an alloy.
Claim 15
Dependent Claim
13 words
(15) The invention as recited in Claim 14 wherein said alloy comprises nickel-chromium.
Claim 16
Dependent Claim
70 words
(16) A metallized electrode strip for an electrical capacitor comprising a base strip of a synthetic resin material, a first metal layer covering said synthetic resin strip to one longitudinal edge thereof and a second electrically continuous layer on said first metal layer spaced from said longitudinal edge to leave an exposed margin of said first metal therealong, the thickness of said synthetic resin strip being less than about 8M.
Claim 17
Dependent Claim
14 words
(17) The invention as recited in Claim 16 wherein said first layer comprises aluminum.
Claim 18
Dependent Claim
16 words
(18) The invention as recited in Claim 17 wherein said second metal layer is an alloy.
Claim 19
Dependent Claim
13 words
(19) The invention as recited in Claim 18 wherein said alloy comprises nickel.
Claim 20
Dependent Claim
15 words
(20) The invention as recited in Claim 19 wherein said alloy comprises nickel and chromium.
Claim 21
Dependent Claim
157 words
(21) An electrical capacitor comprising (a) a pair of spaced electrodes and a dielectric material therebetween, (b) at least one of said electrodes comprising a base polypropylene dielectric strip and a metal bilayer thereon, (c) said metal bilayer comprising a first metal layer on said dielectric strip and a second and different metal layer on said first metal .layer, (d) the electrical stress on said dielectric layer being above abcut 1200 volts per mil thickness, (e) the first metal layer comprises aluminum and is in the range of 5 to 7 ohms per square thickness and said second metal is at least one metal taken from the class consisting of iron, nickel and chromium, and is in the range of 10 10 ohms per square thickness, (f) the second metal being in the metallic state coextensively and spaced from one longitudinal edge of said strip to expose the first metal layer as a margin along the strip.
Claim 22
Dependent Claim
14 words
(22) The invention as recited in Claim 21 wherein said second metal is iron.
Claim 23
Dependent Claim
17 words
(23) The invention as recited in Claim 19 wherein said capacitor is impregnated with a dielectric fluid.
Claim 24
Dependent Claim
107 words
(24) An electrical capacitor having a voltage rating in the range of 370 volts AC to about 660 volts AC and comprising in combination (a) a pair of spaced electrodes and a dielectric material strip therebetween, (b) at least one of said electrodes being a dual metal layer vapor deposited on said dielectric strip, (c) said dielectric strip having a thickness less than about 8M so that the voltage stress is in the range from 1200 to about 1500 volts per mil thickness, (d) the total thickness of said bilayer being in the range of 195A° to 280A° and the second layer being less than about 30A°.
Claim 25
Dependent Claim
17 words
(25) The invention as recited in Claim 24 wherein said capacitor is impregnated with a dielectric fluid.
References Cited (Backward Citations)
No citation records indexed.
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