Patent US4186423A successfully refreshed from Google Patents.
US4186423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid electrolyte capacitor using oxide of Ru, Rh, Re, Os or Ir as electrolyte
Assignee: Panasonic Holdings Corp
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Filing: 1977-09-30
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Granted: 1980-01-29
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Expires: 1997-09-30
Abstract
Abstract A solid electrolyte capacitor superior to a manganese dioxide capacitor and characterized by the use of an oxide of Ru, Rh, Re, Os or Ir either in place of or together with manganese dioxide. The newly utilized metal oxide is good at oxidizing ability and low in resistivity. A solid electrolyte layer comprising the newly utilized metal oxide is formed by pyrolysis of an aqueous solution comprising a soluble salt of the metal on an anodized valve metal. The solution may comprise manganese nitrate too.
Inventors
- 👤 Akihiko Yoshida
- 👤 Atsushi Nishino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:11
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0029; H01G9/0036
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
68 words
A solid electrolyte capacitor comprising: an anode body of a valve metal; a dielectric oxide film formed on the surface of said anode body by anodization; a solid electrolyte layer which is formed on said dielectric oxide film and comprises an oxide of a metal selected from the group consisting of ruthenium, rhodium, rhenium, osmium and iridium; and a cathode collector layer formed on said solid electrolyte layer.
Claim 2
Dependent Claim
68 words
A solid electrolyte capacitor comprising: an anode body of a valve metal; a dielectric oxide film formed on the surface of said anode body by anodization; a solid electrolyte layer which is formed on said dielectric oxide film and comprises an oxide of a metal selected from the group consisting of ruthenium, rhodium, rhenium, osmium and iridium; and a cathode collector layer formed on said solid electrolyte layer.
Claim 3
Dependent Claim
19 words
A capacitor as claimed in claim 1, wherein said solid electrolyte layer comprises manganese dioxide and said metal oxide.
Claim 4
Dependent Claim
34 words
A capacitor as claimed in claim 1, wherein said solid electrolyte layer has a multi-layered structure consisting of at least one layer of said metal oxide and at least one layer of manganese dioxide.
Claim 5
Dependent Claim
32 words
A capacitor as claimed in claim 3, wherein said at least one layer of said metal oxide is a single layer formed on and in direct contact with said dielectric oxide film.
Claim 6
Dependent Claim
15 words
A capacitor as claimed in claim 3, wherein said said metal oxide is ruthenium oxide.
Claim 7
Dependent Claim
29 words
A capacitor as claimed in claim 1, wherein said solid electrolyte layer has a multi-layered structure and includes at least one layer of manganese dioxide containing said metal oxide.
Claim 8
Dependent Claim
31 words
A capacitor as claimed in claim 6, wherein said solid electrolyte layer consists of at least one layer of said metal oxide and said at least one layer of manganese dioxide.
Claim 9
Dependent Claim
32 words
A capacitor as claimed in claim 7, wherein said at least one layer of said metal oxide is a single layer formed on and in direct contact with said dielectric oxide film.
Claim 10
Dependent Claim
35 words
A capacitor as claimed in claim 6, wherein said solid electrolyte layer consists of at least one layer consisting of manganese dioxide and said at least one layer of manganese dioxide containing said metal oxide.
Claim 11
Dependent Claim
35 words
A capacitor as claimed in claim 9, wherein said at least one layer of manganese dioxide containing said metal oxide is a single layer formed on and in direct contact with said dielectric oxide film.
Claim 12
Dependent Claim
14 words
A capacitor as claimed in claim 6, wherein said metal oxide is ruthenium oxide.
Claim 13
Dependent Claim
30 words
A capacitor as claimed in claim 11, wherein the atomic ratio of Ru to Mn in said at least one layer of manganese dioxide ranges from 10 -6 to 1.
Claim 14
Dependent Claim
16 words
A capacitor as claimed in claim 1, wherein said solid electrolyte layer consists of ruthenium oxide.
Claim 15
Dependent Claim
13 words
A capacitor as claimed in claim 1, wherein said valve metal is tantalum.
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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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |