US5812367A
Expired / Lapsed
US
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Solid electrolytic capacitors comprising a conductive layer made of a polymer of pyrrole or its derivative
Assignee: Panasonic Holdings Corp
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Filing: 1997-04-01
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Granted: 1998-09-22
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Expires: 2017-04-01
Abstract
Abstract A solid electrolytic capacitor is composed of a pair of electrodes and a dielectric film therebetween, wherein one electrode includes a conducting polymer doped with a polyvalent anion and a monovalent anion. The conducting polymer layer may have a multi-layer structure wherein a second or third conductive polymer layer is made of doped thiophene or derivative thereof.
Inventors
- 👤 Yasuo Kudoh
- 👤 Kenji Akami
- 👤 Toshikuni Kojima
- 👤 Yasue Matsuya
- 👤 Hiroshi Shimada
- 👤 Chiharu Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:07
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022; H01G9/025; H01G11/00; H01G11/22; H01G11/30; H01G11/48; H01G11/54; H01G11/56; H01G9/0029; H01G9/0036; H01G9/028; H01G9/04; H01G9/042; H01G9/0425; Y; Y02; Y02E; Y02E60/00; Y02E60/13
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
75 words
A solid electrolytic capacitor which comprises a first electrode and a second electrode, and a dielectric film provided therebetween wherein at least the first electrode comprises a first conductive polymer layer made of a polymer selected from the group consisting of pyrrole and derivatives thereof, said first conductive polymer layer being doped with a mixed dopant of a polyvalent anion and a monovalent anion comprising a sulfonate ion dissociated from an anionic surface active agent.
Claim 2
Dependent Claim
75 words
A solid electrolytic capacitor which comprises a first electrode and a second electrode, and a dielectric film provided therebetween wherein at least the first electrode comprises a first conductive polymer layer made of a polymer selected from the group consisting of pyrrole and derivatives thereof, said first conductive polymer layer being doped with a mixed dopant of a polyvalent anion and a monovalent anion comprising a sulfonate ion dissociated from an anionic surface active agent.
Claim 3
Dependent Claim
15 words
A solid electrolytic capacitor according to claim 1, wherein said polyvalent anion comprises a sulfate.
Claim 4
Dependent Claim
27 words
A solid electrolytic capacitor according to claim 1, wherein said dielectric film comprises an oxide of a valve metal and said second electrode comprises a valve metal.
Claim 5
Dependent Claim
22 words
A solid electrolytic capacitor according to claim 3, wherein said valve metal is selected form the group consisting of aluminium and tantalum.
Claim 6
Dependent Claim
15 words
A solid electrolytic capacitor according to claim 1, wherein said dielectric film comprises a polymer.
Claim 7
Dependent Claim
18 words
A solid electrolytic capacitor according to claim 5, wherein said polymer of said dielectric film comprises a polyimide.
Claim 8
Dependent Claim
13 words
A solid electrolytic capacitor according to claim 1, wherein said sulfonate comprises alkylnaphthalenesulfonate.
Claim 9
Dependent Claim
13 words
A solid electrolytic capacitor according to claim 1, wherein said sulfonate comprises dodecylbenzenesulfonate.
Claim 10
Dependent Claim
25 words
A solid electrolytic capacitor according to claim 1, wherein the second electrode comprises said first conductive polymer layer and said dielectric film comprises a polyimide.
Claim 11
Dependent Claim
79 words
A solid electrolytic capacitor according to claim 1, further comprising a second conductive polymer layer provided between said dielectric film and said first conductive polymer layer so that said first conductive polymer layer and said second conductive polymer layer comprise a built-up conductive polymer layer wherein said second conductive polymer layer comprises a polymer of a thiophene derivative of the following formula ##STR5## wherein A represents an unsubstituted or substituted alkylene group, O is oxygen and S is sulfur.
Claim 12
Dependent Claim
21 words
A solid electrolytic capacitor according to claim 10, wherein said second conductive polymer layer comprises a monovalent anion as a dopant.
Claim 13
Dependent Claim
22 words
A solid electrolytic capacitor according to claim 11, wherein said monovalent anion comprises a sulfonate dissociated from an anionic surface active agent.
Claim 14
Dependent Claim
20 words
A solid electrolytic capacitor according to claim 10, wherein said second conductive layer comprises a polyvalent anion as a dopant.
Claim 15
Dependent Claim
15 words
A solid electrolytic capacitor according to claim 13, wherein said polyvalent anion comprises a sulfate.
Claim 16
Dependent Claim
18 words
A solid electrolytic capacitor according to claim 10, wherein said second conductive polymer layer comprises a polystyrenesulfonate anion.
Claim 17
Dependent Claim
69 words
A solid electrolytic capacitor according to claim 10, further comprising a third conductive polymer layer in contact with said first conductive polymer layer on a side opposite a side where said second conductive layer is formed, said third conductive polymer layer comprises a polymer of a thiophene derivative of the following formula ##STR6## wherein A represents an unsubstituted or substituted alkylene group, O is oxygen and S is sulfur.
Claim 18
Dependent Claim
21 words
A solid electrolytic capacitor according to claim 16, wherein said third conductive polymer layer comprises a monovalent anion as a dopant.
Claim 19
Dependent Claim
22 words
A solid electrolytic capacitor according to claim 17, wherein said monovalent anion comprises a sulfonate dissociated from an anionic surface active agent.
Claim 20
Dependent Claim
20 words
A solid electrolytic capacitor according to claim 16, wherein said third conductive layer comprises a polyvalent anion as a dopant.
Claim 21
Dependent Claim
15 words
A solid electrolytic capacitor according to claim 19, wherein said polyvalent anion comprises a sulfate.
Claim 22
Dependent Claim
18 words
A solid electrolytic capacitor according to claim 16, wherein said third conductive polymer layer comprises a polystyrenesulfonate anion.
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