CN100470696C - Method for manufacturing solid electrolytic capacitor - Google Patents
Method for manufacturing solid electrolytic capacitor Download PDFInfo
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- CN100470696C CN100470696C CNB2005100383480A CN200510038348A CN100470696C CN 100470696 C CN100470696 C CN 100470696C CN B2005100383480 A CNB2005100383480 A CN B2005100383480A CN 200510038348 A CN200510038348 A CN 200510038348A CN 100470696 C CN100470696 C CN 100470696C
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Abstract
The method includes steps: core pack is made by winding anode metal foil and cathode metal foil with oxide film being covered, and electrolytic paper between anode and cathode foils; putting core pack into dipping formation liquid to carry out reconditioning and formation process; carrying out process of high temperature carbonization; carrying out process under liquid of containing polymer monomer, and oxidant; after 0-40 minutes, carrying out heat treatment for core pack, which stays room temperature; heating up polyreaction is carried out for treated core pack, which is inserted to aluminum hull, adding rubber bung to seal opening; after ageing treatment obtains product. Advantages are: simple technique, low cost, ensuring excellent ESR characteristic, and lower equivalent series resistance.
Description
Technical field:
The present invention relates to a kind of manufacture method of solid electrolytic capacitor.
Background technology:
Utilize aluminium or tantalum, niobium, titanium etc. to have the metal electrolytic capacitor of valve action, expand surface technology owing to adopted corrosion, can obtain small-sized big capacity, enlarged its purposes greatly, especially use the solid electrolytic capacitor of solid electrolyte, have characteristics such as small-sized, big capacity, low ESR, and easy sheetization, therefore the characteristic that possesses suitable mounted on surface becomes e-machine miniaturization, high performance, indispensable product of cost degradation.
In this solid electrolytic capacitor, as small-sized jumbo purposes, general anode foils and the Cathode Foil that all is to use aluminium etc. to have the valve metal effect, and get involved electrolytic paper therein, be wound into the capacitor core bag, use the Working electrolyte impregnation again, the aluminum hull of packing into, seal with rubber stopper again, so just had seal construction.
In recent years, along with electronic instrument, equipment towards digital development, simultaneously as the operating frequency of the heart CPU of electronic equipment also at high speed, therefore the electric power that is consumed also increases greatly, owing to the integrity problem that heating causes is more and more obvious, as one of countermeasure, its operating voltage can be reduced.In order to reduce supply power voltage, high accuracy supply of electric power loop as the microelectronics processor, as when using as the outlet side filtering of DC-DC voltage changer, need with extremely low ESR (equivalent series resistance) capacitor, and the ESR of existing solid electrolytic capacitor is higher, can not effectively satisfy the needs of the operating frequency high speed of microelectronics processor.
Summary of the invention:
The object of the present invention is to provide a kind of manufacture method with solid electrolytic capacitor of low ESR.
Technical solution of the present invention is:
A kind of manufacture method of solid electrolytic capacitor is characterized in that: comprise the following steps: successively 1. to be made by valve metal and the surface has and gets involved electrolytic paper in the middle of the anode foils of oxide-film and the Cathode Foil and be wound into the core bag;
2. the core bag is put into and changed into liquid and flood, repair and change into processing, and change in reparation and to handle the back and under 280～380 ℃ of conditions, carry out high temperature carbonization and handled 1～2.5 hour;
3. will carry out the impregnation processing with the immersion liquid that contains that contains polymer monomer and oxidant through the core bag that charing is handled;
4. finish in the back 0～40 minute in the immersion liquid impregnation processing that contains, the core bag is carried out heat treated (wherein heating is better in 20 minutes, heats best in 5 minutes), place under the room temperature then through containing polymer monomer and oxidant;
5. will carry out the heated polymerizable reaction through the core bag that 4. step is handled;
6. core is packaged into aluminum hull, and seals, carry out burin-in process then, get product with rubber stopper.
Valve metal is aluminium, tantalum, niobium or titanium.
Repair when changing into processing, the liquid that changes into of employing is that phosphoric acid system changes into liquid, boric acid system changes into liquid or ammonium adipate system changes into liquid, and dip time is 5～120 minutes.
It is ammonium dihydrogen phosphate or diammonium hydrogen phosphate that phosphoric acid system changes into liquid, and it is ammonium borate or ammonium pentaborate that boric acid system changes into liquid, and it is ammonium adipate or adipic acid, ammoniacal liquor that ammonium adipate system changes into liquid.
Step 3. in the method handled of impregnation be the core bag to be immersed to contain maybe will contain immersion liquid in the immersion liquid and be injected in the core bag.
Containing immersion liquid is the mixture of polymerizable monomer and oxidizing agent solution, wherein the content of oxidizing agent solution accounts for 35～65% of amount of the mixture by weight, the content of oxidant is 35～65% by weight in the oxidizing agent solution, the solvent of oxidant can adopt ethanol, n-butanol, water etc., and oxidant is p-methyl benzenesulfonic acid iron or periodic acid, acid iodide.
The described polymerizable monomer monomer solution that to be polymerizable monomer itself or polymerizable monomer and volatile solvent mix by the volume ratio of 1:0.01～2, volatile solvent can use nitrogen compounds such as alcohols such as ketones such as ester class, acetone, methyl alcohol, acetonitrile such as ethers such as hydrocarbon class, oxolane, Ethyl formate such as pentane, and wherein methyl alcohol, ethanol, acetone are best.
Employing will contain immersion liquid and be injected into when carrying out the impregnation processing in the core bag, contain immersion liquid and be the mixture of polymerizable monomer and oxidizing agent solution or contain immersion liquid and form, respectively this two parts injection of solution is gone in the core bag during use by polymerizable monomer solution and oxidizing agent solution two parts.
Step 4. in, in the impregnation processing finishes back 0～5 minute, the core bag is carried out heat treated, the temperature of heat treated is 30～250 ℃, time is 30 minutes～5 hours, places room temperature then following 30 minutes～5 hours, and the heating-up temperature that step is carried out the heated polymerizable reaction in 5. is 20～200 ℃.
Polymer monomer is 3,4-ethene dioxythiophene (claiming EDT again) or thiophene electrolyte, aniline, pyrroles, furans, acetylene and their electrolyte.
Technology of the present invention is simple, and convenient, production cost is low, and the processing step of employing has guaranteed that the solid electrolytic capacitor of producing has good ESR characteristic, promptly has lower equivalent series resistance.
The invention will be further described below in conjunction with embodiment.
Embodiment:
Embodiment 1:
1. a kind of manufacture method of solid electrolytic capacitor comprises the following steps: to be made by valve metal (aluminium, tantalum, niobium or titanium) and the surface has and gets involved electrolytic paper in the middle of the anode foils of oxide-film and the Cathode Foil and be wound into the core bag successively;
2. the core bag is put into and changed into liquid and flood, repair and change into processing, change into liquid and be ammonium dihydrogen phosphate (or diammonium hydrogen phosphate, ammonium borate, ammonium adipate, ammonium pentaborate, adipic acid, ammoniacal liquor), dip time is 10～150 minutes (example 10 minutes, 20 minutes, 60 minutes, 100 minutes, 120 minutes, 150 minutes), changes into the processing back in reparation and carry out 1～2.5 hour (example 1,1.8,2.5 hours) of high temperature carbonization processing under 280～380 ℃ of (280 ℃, 320 ℃, 350 ℃, 380 ℃ of examples) conditions;
3. will contain the immersion liquid impregnation process 3～60 minutes (example 3,10,20,40,60 minutes) with what the 1:1 mixed formed through the butanol solution that the core bag that charing is handled is put into by the p-methyl benzenesulfonic acid iron of EDT and 50%;
4. in the impregnation processing finishes back 0～20 minute (example 1 minute, 5 minutes, 10 minutes, 20 minutes), the core bag is carried out heat treated, the temperature of heat treated is 30～250 ℃ (30 ℃, 80 ℃, 150 ℃, 200 ℃, 250 ℃ of examples), time is 30 minutes～5 hours (example 30 minutes, 1 hour, 3 hours, 5 hours), places room temperature then following 30 minutes～5 hours (example 30 minutes, 1 hour, 3 hours, 5 hours);
5. will wrap in temperature through the core that 4. step is handled and be 20～200 ℃ (can 20 ℃, 50 ℃, 100 ℃, 150 ℃, 200 ℃) and carry out the heated polymerizable reaction under being, time is 30 minutes～5 hours (example 30 minutes, 1 hour, 3 hours, 5 hours), make the PEDT polymerization reaction takes place in the capacitor core bag, form solid electrolyte layer;
6. core is packaged into outer dress shell, the opening part dress seals plug, and the mode of sealing processing with tradition encapsulates, and applies 13V voltage, carries out clock aging in 150 ℃, the 120 minutes burin-in process of other conventional methods (or adopt), gets product.
Embodiment 2:
It is polymerizable monomer thiophene electrolyte (or aniline, pyrroles, furans, acetylene and their electrolyte) and the mixture of oxidant p-methyl benzenesulfonic acid iron (or periodic acid, acid iodide) solution that step contains immersion liquid in 3., wherein the content of oxide solution accounts for 35～65% (examples 35%, 42%, 55%, 65%) of amount of the mixture by weight, the content of oxidant is 35～65% (examples 35%, 42%, 55%, 65%) by weight in the oxidizing agent solution, and the solvent of oxidant adopts ethanol (or n-butanol, water).All the other are all with embodiment 1.
Embodiment 3:
The described polymerizable monomer monomer solution that to be polymerizable monomer and volatile solvent mix by the volume ratio of 1:0.01～2 (can be 1:0.01,1:1,1:2), volatile solvent can use methyl alcohol (or nitrogen compounds such as alcohols such as ketones such as ester class, acetone, ethanol, acetonitrile such as ethers such as pentane, oxolane, Ethyl formate).All the other are all with embodiment 2.
Embodiment 4:
3. step adopts and will contain immersion liquid and be injected into and carry out impregnation in the core bag and handle, and it is identical with embodiment 1 or embodiment 2 to contain immersion liquid.All the other are with embodiment 1.
Embodiment 5:
Contain immersion liquid and form, respectively this two parts injection of solution is gone in the core bag during use by polymerizable monomer solution and oxidizing agent solution two parts.Wherein polymer monomer solution adopts the monomer solution identical with embodiment 3, the form that oxidizing agent solution employing and embodiment 2 are identical.All the other are all with embodiment 4.
Claims (9)
1, a kind of manufacture method of solid electrolytic capacitor is characterized in that: comprise the following steps: successively 1. to be made by valve metal and the surface has and gets involved electrolytic paper in the middle of the anode foils of oxide-film and the Cathode Foil and be wound into the core bag;
2. the core bag is put into and changed into liquid and flood, repair and change into processing, and change in reparation and to handle the back and under 280～380 ℃ of conditions, carry out high temperature carbonization and handled 1～2.5 hour;
3. will carry out the impregnation processing with the immersion liquid that contains that contains polymer monomer and oxidant through the core bag that charing is handled;
4. in 0～5 minute after containing the containing immersion liquid impregnation processing and finish of polymer monomer and oxidant, the core bag is carried out heat treated, place then under the room temperature;
5. will carry out the heated polymerizable reaction through the core bag that 4. step is handled;
6. core is packaged into aluminum hull, seals, carry out burin-in process then, get product with rubber stopper;
Step 4. in, in the impregnation processing finishes back 0～5 minute, the core bag is carried out heat treated, the temperature of heat treated is 30～250 ℃, time is 30 minutes～5 hours, places room temperature then following 30 minutes～5 hours, and the heating-up temperature that step is carried out the heated polymerizable reaction in 5. is 20～200 ℃.
2, the manufacture method of solid electrolytic capacitor according to claim 1 is characterized in that: valve metal is aluminium, tantalum, niobium or titanium.
3, the manufacture method of solid electrolytic capacitor according to claim 1 is characterized in that: repair when changing into processing, the liquid that changes into of employing is that phosphoric acid system changes into liquid, boric acid system changes into liquid or ammonium adipate system changes into liquid, and dip time is 10～150 minutes.
4, the manufacture method of solid electrolytic capacitor according to claim 3, it is characterized in that: it is ammonium dihydrogen phosphate or diammonium hydrogen phosphate that phosphoric acid system changes into liquid, it is ammonium borate or ammonium pentaborate that boric acid system changes into liquid, and it is ammonium adipate or own ammonium acid, ammoniacal liquor that ammonium adipate system changes into liquid.
5, according to the manufacture method of claim 1,2,3 or 4 described solid electrolytic capacitors, it is characterized in that: step 3. in the method handled of impregnation be the core bag to be immersed to contain maybe will contain immersion liquid in the immersion liquid and be injected in the core bag.
6, the manufacture method of solid electrolytic capacitor according to claim 5, it is characterized in that: containing immersion liquid is the mixture of polymerizable monomer and oxidizing agent solution, wherein the content of oxidizing agent solution accounts for 35～65% of amount of the mixture by weight, and the content of oxidant is 35～65% by weight in the oxidizing agent solution.
7, the manufacture method of solid electrolytic capacitor according to claim 6 is characterized in that: the described polymerizable monomer monomer solution that to be polymerizable monomer itself or polymerizable monomer and volatile solvent mix by the volume ratio of 1:0.01～2.
8, the manufacture method of solid electrolytic capacitor according to claim 5, it is characterized in that: employing will contain immersion liquid and be injected into when carrying out the impregnation processing in the core bag, contain immersion liquid and be the mixture of polymerizable monomer and oxidizing agent solution or contain immersion liquid and form, respectively this two parts injection of solution is gone in the core bag during use by polymerizable monomer solution and oxidizing agent solution two parts.
9, according to the manufacture method of claim 1,2,3 or 4 described solid electrolytic capacitors, it is characterized in that: polymer monomer is 3, the 4-ethene dioxythiophene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100383480A CN100470696C (en) | 2005-02-06 | 2005-02-06 | Method for manufacturing solid electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100383480A CN100470696C (en) | 2005-02-06 | 2005-02-06 | Method for manufacturing solid electrolytic capacitor |
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| Publication Number | Publication Date |
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| CN1815649A CN1815649A (en) | 2006-08-09 |
| CN100470696C true CN100470696C (en) | 2009-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100383480A Expired - Fee Related CN100470696C (en) | 2005-02-06 | 2005-02-06 | Method for manufacturing solid electrolytic capacitor |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527203A (en) * | 2009-02-19 | 2009-09-09 | 富士通多媒体部品（苏州）有限公司 | Solid electrolytic capacitor and manufacture method thereof |
| CN101916671B (en) * | 2010-07-01 | 2012-08-15 | 南通江海电容器股份有限公司 | Preparation method of solid electrolytic capacitor capable of reducing ESR and enhancing electrostatic capacitance |
| CN102479618B (en) * | 2010-11-29 | 2014-11-05 | 丰宾电子（深圳）有限公司 | Manufacturing method of solid electrolytic capacitor |
| CN102856077B (en) * | 2012-09-21 | 2016-05-25 | 深圳市柏瑞凯电子科技有限公司 | Solid electrolyte capacitor manufacture method |
| CN103943361B (en) * | 2014-04-23 | 2017-01-25 | 丰宾电子（深圳）有限公司 | Carbonating solution and preparation method and usage method thereof |
| CN107731536A (en) * | 2017-11-09 | 2018-02-23 | 益阳市万京源电子有限公司 | A kind of high-performance solid-state alminium electrolytic condenser preparation method |
| CN109786137B (en) * | 2019-01-31 | 2022-02-22 | 深圳新宙邦科技股份有限公司 | Preparation method of solid capacitor |
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Owner name: NANTONG JIANGHAI CAPACITOR CO., LTD. Free format text: FORMER OWNER: NANTONG JIANGHAI CAPACITOR CO. Effective date: 20090821 |
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Effective date of registration: 20090821 Address after: Chao Ping Town Tongzhou city Jiangsu Tongyang Road No. 79 Patentee after: Nantong Jianghai Capacitor Co., Ltd. Address before: Chao Ping Town Tongzhou city Jiangsu Tongyang Road No. 79 Patentee before: Jianghai Capacitor Co., Ltd., Nantong |
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Granted publication date: 20090318 Termination date: 20160206 |