US4780796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid electrolytic capacitor
Assignee: SOLID ELECTROLYTIC CAPACITOR A CORP OF JAPAN
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Filing: 1987-12-28
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Granted: 1988-10-25
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Expires: 2007-12-28
Abstract
Abstract A solid electrolytic capacitor having excellent characteristics in terms of both electrical properties and thermal stability is obtained by employing a solid electrolyte comprising both an electrically conductive polymer layer (I) formed by a chemical oxidation method and an electrically conductive polymer layer (II) formed by an electrochemical oxidation method.
Inventors
- 👤 Minoru Fukuda
- 👤 Hideo Yamamoto
- 👤 Isao Isa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:39
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G9/00; H01G9/004; H01G9/022; H01G9/025; H01G11/00; H01G11/22; H01G11/30; H01G11/48; H01G11/54; H01G11/56; H01G9/02; H01G9/028; Y; Y02; Y02E; Y02E60/00; Y02E60/13
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A solid electrolytic capacitor having excellent characteristics in terms of both electrical properties and thermal stability comprising, in combination, an electrode having an adherent dielectric oxide coating thereon and a solid electrolyte comprising an electrically conductive polymer layer (I) formed by a chemical oxidation method comprising contacting a monomer with an oxidizing agent and an electrically conductive polymer layer (II) formed on the electrically conductive polymer layer (I) by an electrochemical oxidation method.
Claim 2
Dependent Claim
73 words
A solid electrolytic capacitor having excellent characteristics in terms of both electrical properties and thermal stability comprising, in combination, an electrode having an adherent dielectric oxide coating thereon and a solid electrolyte comprising an electrically conductive polymer layer (I) formed by a chemical oxidation method comprising contacting a monomer with an oxidizing agent and an electrically conductive polymer layer (II) formed on the electrically conductive polymer layer (I) by an electrochemical oxidation method.
Claim 3
Dependent Claim
17 words
The solid electrolytic capacitor according to claim 1, wherein said electrode is made of aluminum or tantalum.
Claim 4
Dependent Claim
19 words
The solid electrolytic capacitor according to claim 1, wherein said electrically conductive polymer layer (I) is polypyrrole or polyaniline.
Claim 5
Dependent Claim
15 words
The solid electrolytic capacitor according to claim 1, wherein said oxidizing agent is chlorine dioxide.
Claim 6
Dependent Claim
19 words
The solid electrolytic capacitor according to claim 1, wherein said electrically conductive polymer layer (II) is polypyrrole or polyaniline.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |