Patent US5117332A successfully refreshed from Google Patents.
US5117332A
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Solid electrolytic capacitors and method for manufacturing the same
Assignee: Panasonic Holdings Corp
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Filing: 1991-05-28
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Granted: 1992-05-26
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Expires: 2011-05-28
Abstract
Abstract A method for manufacturing a solid electrolytic capacitor is described. The method comprises providing a valve metal member which has a dielectric film and an inorganic conductive layer formed on opposite sides of the valve metal member in this order, immersing the valve metal member in an electrolytic polymerization solution, and applying an electric potential sufficient to cause electrolytic polymerization between a first polymerization electrode which is provided on said at least one side of said valve metal member through an electric insulating member and a second polymerization electrode kept away from said first polymerization electrode. Further, the valve metal member may be separated into two regions with an insulating separation layer. One region is a capacitor region and the other is an anode terminal region. The anode terminal region is enfolded or convolutely wound to improve the volumetric efficiency. Solid electrolytic capacitors manufactured by the methods are also described.
Inventors
- 👤 Yasuo Kudoh
- 👤 Sohji Tsuchiya
- 👤 Masao Fukuyama
- 👤 Toshikuni Kojima
- 👤 Junji Ozaki
- 👤 Yasuhiro Kobatake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:34
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/02; H01G11/00; H01G11/22; H01G11/30; H01G11/48; H01G11/52; H01G11/54; H01G11/56; H01G9/022; H01G9/025; H01G9/028; Y; Y02; Y02E; Y02E60/00; Y02E60/13
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
108 words
A method for manufacturing a solid electrolytic capacitor which comprises: providing a valve metal member which has a dielectric film and an inorganic conductive layer formed on opposite sides of the valve metal member in this order; immersing said valve metal member in an electrolytic polymerization solution; and applying an electric potential sufficient to cause electrolytic polymerization between a first polymerization electrode which is provided on said at least one side of said valve metal member through an electric insulating member and a second polymerization electrode kept away from said first polymerization electrode whereby an electrolytically polymerized film is formed on the immersed portion of said valve metal.
Claim 2
Independent Claim
108 words
A method for manufacturing a solid electrolytic capacitor which comprises: providing a valve metal member which has a dielectric film and an inorganic conductive layer formed on opposite sides of the valve metal member in this order; immersing said valve metal member in an electrolytic polymerization solution; and applying an electric potential sufficient to cause electrolytic polymerization between a first polymerization electrode which is provided on said at least one side of said valve metal member through an electric insulating member and a second polymerization electrode kept away from said first polymerization electrode whereby an electrolytically polymerized film is formed on the immersed portion of said valve metal.
Claim 3
Dependent Claim
43 words
The method according to claim 1, wherein said inorganic conductive layer is formed by immersing said valve metal member having the dielectric film thereon in an aqueous solution of manganese nitrate and thermally decomposed at a temperature of from 200° to 400° C.
Claim 4
Dependent Claim
16 words
The method according to claim 1, wherein said electric insulating member is made of a polymer.
Claim 5
Dependent Claim
12 words
The method according to claim 3, wherein said polymer is a polyimide.
Claim 6
Dependent Claim
42 words
The method according to claim 1, wherein said electric insulating member is provided on said inorganic conductive layer and said first polymerization electrode is in contact with or at a distance, which is sufficient for electrolytic polymerization, from said electric insulating member.
Claim 7
Dependent Claim
23 words
The method according to claim 1, wherein said electrolytic polymerization solution contains an electrolytically polymerizable monomer, a support electrolyte and a solvent therefor.
Claim 8
Dependent Claim
25 words
The method according to claim 6, wherein said electrolytically polymerizable monomer is a member selected from the group consisting of pyrrole, thiophene and derivatives thereof.
Claim 9
Dependent Claim
17 words
The method according to claim 1, wherein said valve metal member is made of tantalum or aluminium.
Claim 10
Dependent Claim
76 words
A solid electrolytic capacitor which comprises a valve metal member having an electric insulating separation layer for separation of said valve metal member into two regions on opposite sides of said valve metal member, a dielectric film formed on at least one of the regions, and a conductive polymer film formed on the dielectric film on one region to form a capacitor portion, the other region being enfolded or convolutely wound to reduce a volumetric size.
Claim 11
Dependent Claim
76 words
A solid electrolytic capacitor which comprises a valve metal member having an electric insulating separation layer for separation of said valve metal member into two regions on opposite sides of said valve metal member, a dielectric film formed on at least one of the regions, and a conductive polymer film formed on the dielectric film on one region to form a capacitor portion, the other region being enfolded or convolutely wound to reduce a volumetric size.
Claim 12
Dependent Claim
19 words
The solid electrolytic capacitor according to claim 9, wherein said valve metal member is made of tantalum or aluminium.
Claim 13
Dependent Claim
19 words
The solid electrolytic capacitor according to claim 9, wherein said electric insulating separation layer is made of a polymer.
Claim 14
Dependent Claim
22 words
The solid electrolytic capacitor according to claim 9, wherein said conductive polymer film is derived from pyrrole, thiophene or a derivative thereof.
Claim 15
Dependent Claim
25 words
The solid electrolytic capacitor according to claim 9, wherein said conductive polymer film is an electrolytically polymerized film or pyrrole, thiophene or a derivative thereof.
Claim 16
Independent Claim
74 words
A method for manufacturing a solid electrolytic capacitor which comprises; providing a valve metal member having a dielectric film thereon; separating said valve metal member into a first region and a second region on opposite sides of the valve metal member by means of an insulating separation layer; forming a conductive polymer film on one of the regions to provide a capacitor region; and enfolding the other region which serves as an anode terminal.
Claim 17
Independent Claim
74 words
A method for manufacturing a solid electrolytic capacitor which comprises; providing a valve metal member having a dielectric film thereon; separating said valve metal member into a first region and a second region on opposite sides of the valve metal member by means of an insulating separation layer; forming a conductive polymer film on one of the regions to provide a capacitor region; and enfolding the other region which serves as an anode terminal.
Claim 18
Dependent Claim
21 words
The method according to claim 14, wherein said dielectric film is formed prior to the separation of said valve metal member.
Claim 19
Dependent Claim
20 words
The method according to claim 14, wherein said dielectric film is formed after the separation of said valve metal member.
Claim 20
Dependent Claim
21 words
The method according to claim 14, wherein said conductive polymer film is formed by electrolytic polymerization of a polymerizable heterocylic compound.
Claim 21
Dependent Claim
97 words
The method according to claim 17, wherein the electrolytic polymerization is performed by a procedure which comprises forming an inorganic conductive layer on said dielectric film, immersing said valve metal member in an electrolytic polymerization solution, and applying a potential sufficient to cause electrolytic polymerization between a first polymerization electrode which is provided on said at least one side of said valve metal member through an electric insulating member provided on the capacitor region and a second polymerization electrode kept away from said first polymerization electrode whereby an electrolytically polymerized film is formed on said valve metal.
Claim 22
Dependent Claim
16 words
The method according to claim 18, wherein said electric insulating member is made of a polymer.
Claim 23
Dependent Claim
12 words
The method according to claim 18, wherein said polymer is a polyimide.
Claim 24
Dependent Claim
42 words
The method according to claim 18, wherein said electric insulating member is provided on said inorganic conductive layer and said first polymerization electrode is in contact with or at a distance, which is sufficient for electrolytic polymerization, from said electric insulating member.
Claim 25
Dependent Claim
23 words
The method according to claim 18, wherein said electrolytic polymerization solution contains an electrolytically polymerizable monomer, a support electrolyte and a solvent therefor.
Claim 26
Dependent Claim
25 words
The method according to claim 22, wherein said electrolytically polymerizable monomer is a member selected from the group consisting of pyrrole, thiophene and derivatives thereof.
Claim 27
Dependent Claim
17 words
The method according to claim 18, wherein said valve metal member is made of tantalum or aluminium.
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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) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |