CN201732694U - Solid electrolytic capacitor - Google Patents
Solid electrolytic capacitor Download PDFInfo
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- CN201732694U CN201732694U CN2010201454155U CN201020145415U CN201732694U CN 201732694 U CN201732694 U CN 201732694U CN 2010201454155 U CN2010201454155 U CN 2010201454155U CN 201020145415 U CN201020145415 U CN 201020145415U CN 201732694 U CN201732694 U CN 201732694U
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- layer
- electrolytic capacitor
- solid electrolyte
- cathodal
- solid electrolytic
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Abstract
The utility model relates to a solid electrolytic capacitor. The solid electrolytic capacitor comprises an anodal body, an oxide film medium, a solid electrolyte layer, a first cathodal layer and a second cathodal layer; the oxide film medium is formed on the outer surface of the anodal body; the solid electrolyte layer is formed on the outer surface of the oxide film medium; the first cathodal layer is formed on the outer surface of the solid electrolyte layer; the second cathodal layer is formed on the outer surface of the first cathodal layer; the upper edge of the first cathodal layer is lower than the upper edge of the solid electrolyte layer; and the upper edge of the second cathodal layer is lower than the upper edge of the first cathodal layer. The solid electrolyte layer is an electroconductive polymer layer or oxide, the first cathodal layer is a carbon layer, and the second cathodal layer is a silver layer. Since the upper edge of the carbon layer is lower than the upper edge of the solid electrolyte layer, the probability of the direct contact between the carbon layer and the anodal body is greatly decreased, and thereby the leakage current of the solid electrolytic capacitor is evidently reduced. Since the upper edge of the silver layer is lower than the upper edge of the carbon layer, the probability of the contact between the silver layer and the electroconductive polymer layer is decreased, and thereby the leakage current of the solid electrolytic capacitor is evidently reduced.
Description
[technical field]
The utility model relates to a kind of solid electrolytic capacitor.
[background technology]
Solid electrolytic capacitor, because high frequency characteristics is good, and small-sized and big capacity, therefore, in the high-frequency circuit of various electronic installations such as personal computer or device for image, be used widely.
See also shown in Figure 1, solid electrolytic capacitor generally comprises capacitor anode body 10 in the prior art, the oxide film dielectric 20 that forms on capacitor anode body 10 surfaces, the solid electrolyte layer 30 that forms at oxide film dielectric 20 outer surfaces, first cathode layer 40 that forms at solid electrolyte layer 30 outer surfaces, second cathode layer 50 that forms at first cathode layer, 40 outer surfaces.Solid electrolyte layer 30 is conductive polymer coating or oxide, and first cathode layer 40 is a carbon-coating, and second cathode layer 50 is a silver layer.Carbon-coating 40 of the prior art generally be adopt the capacitor element will prepare after the solid electrolyte layer 30 to impregnated in that carbon is starched or carbon paste in, be prepared from after the oven dry.An effect of carbon-coating 40 is the contact resistances that reduce silver layer and solid electrolyte layer 30, another effect is to prevent that silver layer 50 from the silver migration taking place, cause the fault location of silver, form electric pathway, cause the leaky condenser rheology big by solid electrolyte layer 30 arrival oxide film dielectrics.If yet carbon-coating directly contact with oxide film dielectric, carbon may reach the oxide film dielectric fault location, and form electric pathway, will cause condenser leakage current obviously to increase equally.And the scheme of prior art is easy to cause the leakage current of solid electrolytic capacitor to increase.
[utility model content]
The solid electrolytic capacitor that provides a kind of leakage current less is provided technical problem to be solved in the utility model.
The utility model solves the problems of the technologies described above by the following technical solutions:
A kind of solid electrolytic capacitor, the oxide film dielectric that comprises anode bodies, forms at the anode bodies outer surface, the solid electrolyte layer that forms at the oxide film dielectric outer surface, first cathode layer that forms at the solid electrolyte layer outer surface, second cathode layer that the first cathode layer outer surface forms; The top edge of described first cathode layer is lower than the top edge of described solid electrolyte layer; The top edge of described second cathode layer is lower than the top edge of described first cathode layer.
Described solid electrolyte layer is conductive polymer coating or oxide, and first cathode layer is a carbon-coating, and second cathode layer is a silver layer.Conducting polymer is a polypyrrole, polythiophene, and polyaniline or derivatives thereof, oxide are manganese dioxide.
Described capacitor anode body is valve metal or oxide.
The valve metal of described capacitor anode body is aluminium, tantalum, niobium, titanium, and described oxide is a columbium monoxide.
Advantage of the present utility model is: the top edge of carbon-coating is lower than the top edge of described solid electrolyte layer, greatly reduces the probability that carbon-coating and anode bodies directly contact, thereby obviously reduces the leakage current of solid electrolytic capacitor.The top edge of silver layer is lower than the top edge of described carbon-coating, has reduced the probability that silver layer contacts with solid electrolyte layer, thereby the leakage current that obviously reduces solid electrolytic capacitor reaches.The utility model raw material is reasonable, preparation process is simple, is fit to large-scale promotion application.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is a solid electrolytic capacitor structural representation in the prior art.
Fig. 2 is the utility model structural representation.
[embodiment]
The capacitor chip of solid electrolytic capacitor is valve metal or the oxide that surface coverage has dielectric layer, and valve metal is aluminium, tantalum, niobium or titanium etc., and oxide is a columbium monoxide etc.Solid electrolyte is electric conductive polymer or oxide, and conducting polymer is a polypyrrole, polythiophene, and polyaniline or derivatives thereof, oxide are manganese dioxide.
The present invention is an example with the solid aluminum electrolytic capacitor, see also shown in Figure 2, the oxide-film (AL that comprises aluminium core 1, forms at aluminium core 1 outer surface as anode bodies
2O
3) medium 2, the solid electrolyte layer that forms at oxide film dielectric 2 outer surfaces be polypyrrole 3, first cathode layer that forms at polypyrrole 3 outer surfaces is a carbon-coating 4, second cathode layer that forms at carbon-coating 4 outer surfaces is a silver layer 5; The top edge of polypyrrole 3 is expressed as 31 among Fig. 2, and the top edge of carbon-coating 4 is expressed as 41, and the top edge of silver layer 5 is expressed as 51.As can be seen from Figure 2, the height of carbon-coating 4 is lower than the height of polypyrrole 3, and the height of silver layer 5 is lower than the height of carbon-coating 4.
The top edge of the utility model carbon-coating is lower than the top edge of described solid electrolyte layer; Greatly reduce the probability that carbon-coating and anode bodies directly contact, thereby obviously reduce the leakage current of solid electrolytic capacitor.The top edge of silver layer is lower than the top edge of described carbon-coating, has reduced the probability that silver layer contacts with solid electrolyte layer, thereby obviously reduces the leakage current of solid electrolytic capacitor.The utility model raw material is reasonable, preparation process is simple, is fit to large-scale promotion application.
Claims (3)
1. solid electrolytic capacitor, the oxide film dielectric that comprises anode bodies, forms at the anode bodies outer surface, the solid electrolyte layer that forms at the oxide film dielectric outer surface, first cathode layer that forms at the solid electrolyte layer outer surface, second cathode layer that the first cathode layer outer surface forms; It is characterized in that: the top edge of described first cathode layer is lower than the top edge of described solid electrolyte layer; The top edge of described second cathode layer is lower than the top edge of described first cathode layer.
2. a kind of solid electrolytic capacitor as claimed in claim 1 is characterized in that: described solid electrolyte layer is conductive polymer coating or oxide, and first cathode layer is a carbon-coating, and second cathode layer is a silver layer.
3. a kind of solid electrolytic capacitor as claimed in claim 1 is characterized in that: the anode bodies of described solid electrolytic capacitor is valve metal or oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201454155U CN201732694U (en) | 2010-03-30 | 2010-03-30 | Solid electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201454155U CN201732694U (en) | 2010-03-30 | 2010-03-30 | Solid electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201732694U true CN201732694U (en) | 2011-02-02 |
Family
ID=43523851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201454155U Expired - Lifetime CN201732694U (en) | 2010-03-30 | 2010-03-30 | Solid electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201732694U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110942917A (en) * | 2018-09-21 | 2020-03-31 | 钰冠科技股份有限公司 | Capacitor packaging structure, capacitor and polymer composite layer |
| CN110942918A (en) * | 2018-09-21 | 2020-03-31 | 钰冠科技股份有限公司 | Stacked capacitor, manufacturing method thereof and silver colloid layer |
-
2010
- 2010-03-30 CN CN2010201454155U patent/CN201732694U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110942917A (en) * | 2018-09-21 | 2020-03-31 | 钰冠科技股份有限公司 | Capacitor packaging structure, capacitor and polymer composite layer |
| CN110942918A (en) * | 2018-09-21 | 2020-03-31 | 钰冠科技股份有限公司 | Stacked capacitor, manufacturing method thereof and silver colloid layer |
| CN110942918B (en) * | 2018-09-21 | 2022-08-12 | 钰冠科技股份有限公司 | Stacked capacitor, manufacturing method thereof and silver colloid layer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200312 Address after: 350000 room 1110, floor 1, No. 160, jiangbindong Avenue, Mawei District, Fuzhou City, Fujian Province (within the free trade zone) Patentee after: Fujian Guoguang Xinye Technology Co., Ltd Address before: 160 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Patentee before: Fujian Guoguang Electronic Science & Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110202 |