Patent US4864472A successfully refreshed from Google Patents.
US4864472A
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Solid electrolyte capacitor
Assignee: Panasonic Holdings Corp
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Filing: 1988-03-30
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Granted: 1989-09-05
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Expires: 2008-03-30
Abstract
Abstract A solid electrolytic capacitor uses a solid electrolyte wherein manganese dioxide is uniformly diffused in a polymer made by electrochemical polymerization, and the solid electrolyte is disposed between a first electrode made of valve metal and having an anodic oxide film thereon and a second electrode opposite to the first electrode. The solid electrolytic capacitor shows splendid high frequency characteristics and small leakage current.
Inventors
- 👤 Susumu Yoshimura
- 👤 Sohji Tsuchiya
- 👤 Yasuo Kudoh
- 👤 Toshikuni Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:36
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/008; H01G9/012; C; C08; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123; H01G9/022; H01G9/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
62 words
A solid electrolytic capacitor comprising A first electrode made of a valve metal having an anodic oxide film thereon, a second electrode opposing to said first electrode, a solid electrolyte which is a uniform hybrid conductive film made by electrochemical method and comprising manganese dioxide and an electrochemical polymer, said solid electrolyte being disposed between said first electrode and said second electrode.
Claim 2
Dependent Claim
62 words
A solid electrolytic capacitor comprising A first electrode made of a valve metal having an anodic oxide film thereon, a second electrode opposing to said first electrode, a solid electrolyte which is a uniform hybrid conductive film made by electrochemical method and comprising manganese dioxide and an electrochemical polymer, said solid electrolyte being disposed between said first electrode and said second electrode.
Claim 3
Dependent Claim
35 words
A solid electrolytic capacitor in accordance with claim 1 wherein; said electrochemical polymer is made by anodic oxidation polymerization of a monomer selected from the group consisting of pyrrole, thiophene, thienylpyrrole, aniline, indole and furan.
Claim 4
Dependent Claim
118 words
A solid electrolytic capacitor in accordance with claim 1 wherein; said hybrid conductive film is made by making oxidation reaction of manganese and electrochemical polymerization of monomer at the same time on a surface of said valve metal, with using an electrolyte which is at least a monomer selected from the group consisting of pyrrole, thiophene thienylpyrrole, aniline, indole and furan, and a supporting electrolyte which is at least one member selected from the group consisting of a salt selected from the group consisting of manganese sulfate, manganese nitrate and manganese perchlorate, a compound selected from the group consisting of paratoluene sulfonic acid, phthalic acid, oxalic acid and tetrafluoroborate and a mixture of said salt and said compound.
Claim 5
Dependent Claim
22 words
A solid electrolytic capacitor in accordance with claim 1 wherein; said manganese dioxide is substantially uniformly dispersed in said electrochemical polymer film.
Claim 6
Dependent Claim
17 words
A solid electrolyte comprising an electrochemical polymer and maganese dioxide substantially uniformly dispersed in said electrochemical polymer.
Claim 7
Dependent Claim
17 words
A solid electrolyte comprising an electrochemical polymer and maganese dioxide substantially uniformly dispersed in said electrochemical polymer.
Claim 8
Dependent Claim
37 words
A solid electrolyte in accordance with claim 5 wherein; said electrochemical polymer is made by making anodic oxidation polymerization of at least one monomer selected from the group consisting of pyrrole, thiophene, thienylpyrrole, aniline, indole, and furan.
References Cited (Backward Citations)
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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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |