CN103295787A - Method for processing dielectric oxide-film during manufacturing of electrolytic capacitors - Google Patents
Method for processing dielectric oxide-film during manufacturing of electrolytic capacitors Download PDFInfo
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- CN103295787A CN103295787A CN201310202770XA CN201310202770A CN103295787A CN 103295787 A CN103295787 A CN 103295787A CN 201310202770X A CN201310202770X A CN 201310202770XA CN 201310202770 A CN201310202770 A CN 201310202770A CN 103295787 A CN103295787 A CN 103295787A
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Abstract
The invention relates to a method for processing dielectric oxide-film during manufacturing of electrolytic capacitors, in particular to a dielectric oxide-film preprocessing method added during manufacturing of the electrolytic capacitors by utilizing valve metal such as tantalum, niobium, titanium and aluminum as anodes and utilizing high-molecular conducting polymers as cathodes. The method includes the steps of preparing an anode porous sintered body with leads by valve metal powder through die pressing and vacuum sintering, forming the dielectric oxide-film on the surface of the anode porous sintered body by means of electrochemical process, performing dielectric oxide-film preprocess on anode pellets, forming a high-molecular conducting polymer layer on the surface of the anode porous sintered body with the dielectric oxide-film, coating a graphite layer and a silver paste layer on the outer side of the high-molecular conducting polymer layer sequentially, and finally forming a product by means of die-pressing package. The electrolytic capacitors manufactured by the method have the advantages of low equivalent series resistance (ESR), low leakage current and the like.
Description
Technical field
The present invention relates to the processing method of electrolytic capacitor manufacture process medium oxide-film, be particularly related to traditional be anode with valve metals such as tantalum, niobium, titanium, aluminium, be the pretreated method to dielectric oxide film that catholyte is made to be increased in the electrolytic capacitor process with the conductive polymer polymer.
Background technology
Usually, the main manufacture process of solid electrolytic capacitor comprises: use valve metal powder compacting sinterings such as tantalum, niobium, titanium, aluminium to become porous anode body, the method of the surface of this anode bodies being passed through electrochemical oxidation forms dielectric oxide film, form dielectric substrate at this dielectric oxide film layer, form cathode layer more thereon.We know that the key technical indexes of capacitor has capacitance, withstand voltage, heatproof value, leakage current, loss.Except these three important indicators, for Low ESR series electrolytic capacitor, it also has a very important index is exactly that equivalent series resistance (ESR), and ESR is more low, and loss is more little, and output current is just more big, and the quality of capacitor is more high.In recent years, obtain more low ESR (ESR) in order to make capacitor, adopt electroconductive polymer layer as dielectric substrate more.In order to satisfy the hyundai electronics information equipment to the demand of miniaturization, high speed development, capacitor has been proposed a series of new requirements, the particularly electrolytic capacitor that the switch power filter is used proposed small-sized high capacity tight demand simultaneously.
Described by 3 in European patent EP-A-340 512 specifications, the solid electrolyte that 4 ethylidene dioxy thiophene are made poly-3, the production method of 4 ethylidene dioxy thiophene (PEDT), and the purposes that PEDT is used for the solid electrolyte of electrolytic capacitor by the oxidation polymerization effect.PEDT is as the substitute of manganese dioxide in the solid electrolytic capacitor or charge transfer complex, because it has higher conductivity, therefore can reduce the equivalent series resistance of capacitor and improve frequency performance.Open flat 2-130906, U.S.Pat.Nos.5,729,428 the spy in addition; 5,968,417; 6,001,281; All relate to the manufacturing of electrostrictive polymer electrolysis condenser in many patents such as 6,059,999 and 6,674,635.
But the related electrolytic capacitor of these patents has a common characteristic, and namely leakage current is big, and this has limited the range of application of conductive polymer thing electrolytic capacitor to a great extent.
Summary of the invention
In order to overcome the existing big shortcoming of conductive polymer polymer solids electrolytic capacitor leakage current, the present invention aims to provide a kind of processing method of electrolytic capacitor manufacture process medium oxide-film, produces the electrolytic capacitor that equivalent series resistance (ESR) is low, leakage current is little.Its technical scheme of taking is as follows:
A kind of processing method of electrolytic capacitor manufacture process medium oxide-film has increased anode pellet dielectric oxide film preprocessing process, may further comprise the steps:
Step 1: the valve metal powder is become the anode porous sintered body that has lead-in wire through mold pressing and vacuum-sintering, described valve metal powder specific volume〉50000 μ F/g, sintered density is 5.2～5.8g.cm
3, thickness is 0.6～1.2mm;
Step 2: adopt electrochemical method to form dielectric oxide film in the porous sintered surface of anode;
Step 3: anode pellet dielectric oxide film preliminary treatment;
Step 4: form the conducting high polymers layer in the porous sintered surface of the anode that has dielectric oxide film;
Step 5: coated graphite layer and silver slurry layer successively outside conducting high polymers thing layer, the used graphite of cathode conductive layer is the low temperature graphite of tool high conduction performance, its electric conductivity＜30 Ω .m-2, curing temperature＜100 ℃;
Step 6: form finished product by the mold pressing encapsulation.
The preliminary treatment of the described anode pellet of described step 3 dielectric oxide film may further comprise the steps:
3.1: the pretreatment fluid of ratio preparation by volume, in the pretreatment fluid, to include concentration be 0.001mol/l～1mol/l, comprise the straight or branched of 1 to 10 carbon atom, the Ester of saturated or undersaturated polymerization anionic group, and the organic sulfonic acid of concentration＜5%, all the other solution are solvent;
3.2: pretreatment fluid is placed water bath with thermostatic control, and bath temperature is 25 ℃～50 ℃;
3.3: the capacitor anode pellet that will make oxidation film layer is completely infused in the pretreatment fluid, adopt D.C. regulated power supply to add the dc offset voltage of 5V at capacitor anode pellet two ends simultaneously, this direct voltage is generally anode pellet oxide-film and forms 10%～20% of voltage, and dip time is 10～15min;
3.4: the capacitor after will flooding well at first places 50 ℃ the dry 10min of baking oven, places 150 ℃ the dry 15～20min of baking oven then;
Ester described in the described step 3-3.1 is carbomethoxy, ethoxycarbonyl, propyl ester base, epoxy propyl ester base, isopropyl esters, epoxy isopropyl esters, butyl ester base, pentyl ester base and one or more in the ester group.
The concentration of polymerization anionic group described in the described step 3-3.1 is 0.01mol/l～0.1mol/l.
Organic sulfonic acid is 1%～3% among the described step 3-3.1.
Solvent described in the described step 3-3.1 is water and ethanol.
The content of water＜50% described in the described step 3-3.1.
The content of water described in the described step 3-3.1 is 20～40%.
Bath temperature is 30～35 ℃ among the described step 3-3.1.
Compared with prior art, the invention provides a kind of processing method of electrolytic capacitor manufacture process medium oxide-film, especially be the preparation technique of dielectric surface treatment liquid with valve metal oxides such as tantalum, niobium, titanium, aluminium, the surface treatment liquid of preparing is used for the manufacturing of conductive polymer polymer solids electrolytic capacitor, intrinsic contaminant defective in the capacitor anode valve metal oxides dielectric layer is isolated, thereby reduce the leakage current of capacitor, thereby produce the electrolytic capacitor that equivalent series resistance (ESR) is low, leakage current is little.
Embodiment
The manufacture method of general solid electrolytic capacitor comprises the following steps: successively
A, the valve metal powder is become the anode porous sintered body that has lead-in wire through mold pressing and vacuum-sintering;
B, adopt electrochemical method to form dielectric oxide film in the porous sintered surface of anode;
C, form the conducting high polymers layer in the porous sintered surface of the anode that has dielectric oxide film;
D, outside conducting high polymers thing layer coated graphite layer and silver slurry layer successively;
E, form final products by mold pressing encapsulation.
Wherein a, valve metal refer to metal tantalum, niobium, titanium or aluminium, and with valve metal powder (more than the specific volume 50000 μ F/g) porous sintered of formed anode (abbreviation agglomerate) after mold pressing and vacuum-sintering, its sintered density is 5.2～5.8g.cm
-3, thickness is 0.6～1.2mm.
Wherein b, to adopt electrochemical method to form dielectric oxide film on porous sintered of anode surface be that agglomerate is immersed in the dilute phosphoric acid solution, the dielectric oxide film layer that forms through electrochemical reaction under the certain voltage condition.
Wherein d, the used graphite of negative electrode conducting shell are the low temperature graphite of tool high conduction performance, the electric conductivity of this graphite＜30 Ω .m
-2, curing temperature＜100 ℃.
Used silver slurry is the low-temperature silver slurry of tool high conduction performance, the electric conductivity＜0.015 Ω .m of this silver slurry
-2, curing temperature＜150 ℃.
Wherein e, form final products by press mold encapsulation.
Maximum characteristics of the present invention are to increase between step b and the step c dielectric oxide film preprocessing process, the especially compound method of dielectric oxide film surface treatment liquid.
A kind of processing method of electrolytic capacitor manufacture process medium oxide-film has increased anode pellet dielectric oxide film preprocessing process, may further comprise the steps:
Step 1: the valve metal powder is become the anode porous sintered body that has lead-in wire through mold pressing and vacuum-sintering, described valve metal powder specific volume〉50000 μ F/g, sintered density is 5.2～5.8g.cm
-3, thickness is 0.6～1.2mm;
Step 2: adopt electrochemical method to form dielectric oxide film in the porous sintered surface of anode;
Step 3: the preliminary treatment of anode pellet dielectric oxide film may further comprise the steps;
3.1: the pretreatment fluid of ratio preparation by volume, in the pretreatment fluid, including concentration is 0.001mol/L～1mol/L, the straight or branched that comprises 1 to 10 carbon atom, the carbomethoxy of saturated or undersaturated polymerization anionic group, ethoxycarbonyl, the propyl ester base, epoxy propyl ester base, isopropyl esters, the epoxy isopropyl esters, the butyl ester base, pentyl ester base and one or more Esters in the ester group, the organic sulfonic acid of concentration＜5%, preferred concentration is 1%～3% organic sulfonic acid, all the other solution are solvent, solvent preferred water and ethanol, wherein, the content of water＜50%, the content of preferred water is 20～40%, the preferred 0.01mol/L～0.1mol/L of the concentration of polymerization anionic group;
3.2: pretreatment fluid is placed water bath with thermostatic control, and bath temperature is 25 ℃～50 ℃, and the preferred water bath temperature is 30～35 ℃;
3.3: the capacitor anode pellet that will make oxidation film layer is completely infused in the pretreatment fluid, adopt D.C. regulated power supply to add the dc offset voltage of 5V at capacitor anode pellet two ends simultaneously, this direct voltage is generally anode pellet oxide-film and forms 10%～20% of voltage, and dip time is 10～15min;
3.4: the capacitor after will flooding well at first places 50 ℃ the dry 10min of baking oven, places 150 ℃ the dry 15～20min of baking oven then;
Step 4: having the porous sintered surface formation of dielectric oxide film anode conducting high polymers layer;
Step 5: coated graphite layer and silver slurry layer successively outside conducting high polymers thing layer, the used graphite of cathode conductive layer is the low temperature graphite of tool high conduction performance, its electric conductivity＜30 Ω .m-2, curing temperature＜100 ℃;
Step 6: form finished product by the mold pressing encapsulation.
Usually, the working centre of solid electrolytic capacitor is the dielectric oxide film that adopts electrochemical method to form in the porous sintered surface of anode, optimal state is that this layer of requirement oxidation film layer exists with amorphous form fully, yet in the manufacture process of solid electrolytic capacitor, the employed valve metal powder of anode always exists various (such as iron, carbon, calcium, magnesium etc.) trace impurity, though can get rid of some volatile impurity by the high-temperature vacuum sintering, but this effect is limited, most impurity element is solidificated in porous sintered of the formed anode by high temperature sintering, when adopting electrochemical method to form the dielectric oxide rete by certain voltage on the valve metal surface, these impurity elements will become the crystallization center in the dielectric oxide rete, if these crystallization centers are not handled, then when making conductive polymer polymer catholyte layer, cardioelectric field will be concentrated in the crystallization at these impurity places, make the dielectric layer heating, can make conductive polymer coating Yin Gaore and directly evaporation on the one hand, can make the graphite of post-production draw layer on the other hand directly contacts with the dielectric oxide layer, cause that condenser leakage current increases, thereby finally cause the puncture of whole capacitor device.
Find in the process that electrolytic capacitor anode dielectric oxide rete forms by a large amount of experiments, mostly be the center of positive charge that is positive for the formed crystallization of micro-transition metal impurity defective center, in the capacitor course of work, these center of positive charge will be assembled a large amount of electronics and be caused that electric stress is concentrated, in order to stop concentrating of conduction electrons stream, adopt weakly conducting or non-conductive polymer polymerization plasma with anionic functional group to carry out preliminary treatment to the formed crystallization of impurity defect center, these have anionic functional group high molecular polymerization ion and will accumulate in around the impurity defect of positively charged in solution.The polymerization anionic group that uses among the present invention mainly comprises the straight or branched of 1 to 10 carbon atom, saturated or unsaturated alkyl ester group, and optional example comprises carbomethoxy, ethoxycarbonyl, propyl ester base, epoxy propyl ester base, isopropyl esters, epoxy isopropyl esters, butyl ester base, pentyl ester base and ester group.Yet the invention is not restricted to these examples.
Solid electrolytic capacitor with the inventive method is produced has ultra-low equivalent series resistance ERS value, under the test frequency of 100KHz, and its ESR value＜50m Ω.The product leakage current is low to moderate 0.01CV, be starkly lower than the leakage current 0.1CV of conventional polymer electrolytic capacitor product, its impedance frequency characteristic is good, it is stable that its ESR value can keep in 10KHz～1000KHz scope, rate of change＜10% can satisfy modern high frequency switch power fully to the specific (special) requirements of filter capacitor.
Embodiment 1: choosing the CV value is 32, the tantalum powder of 000 μ Fv/g, compacting in flakes, and sinter into 1450 ℃ of following high temperature high vacuum and to contain tantalum lead-in wire, be of a size of the anode porousness agglomerate (abbreviation agglomerate) of 4.3mm * 3.1mm * 0.9mm, agglomerate is anodizing to 53V in the phosphoric acid,diluted aqueous solution, forms the dielectric oxide film layer, scurry the teflon gasket with insulation property at anode tap then.By following step preparation oxidation film layer surface preparation liquid, carry out surface preparation then:
Prepare pretreatment fluid in proportion, the pretreatment fluid composition is: methyl methacrylate 5%, camphorsulfonic acid 2%, water 30%, ethanol 63%;
Pretreatment fluid is placed water bath with thermostatic control, and bath temperature remains on 30 ℃;
The capacitor anode pellet of making oxidation film layer is completely infused in the pretreatment fluid, adopt D.C. regulated power supply to add the dc offset voltage of 5V at capacitor anode pellet two ends simultaneously, this direct voltage is generally anode pellet oxide-film and forms 10%～20% of voltage, and dip time is 10min～15min;
Capacitor after dipping is good at first places 50 ℃ the dry 10min of baking oven, places 150 ℃ the dry 15min～20min of baking oven then.
Then will be through pretreated anode pellet under 0～10 ℃ of low temperature, immerse first polymer fluid, first polymer fluid contains the conducting polymer monomer 3 of 2wt%, 4-vinyl dioxy thiophene, the oxidant p-methyl benzenesulfonic acid iron that contains 40wt%, contain 0.3% silane coupler, all the other are solvent, n-butanol and isopropyl alcohol, n-butanol and isopropyl alcohol weight proportion 1:1, after soaking 6～10 minutes, take out agglomerate, at room temperature placed 10 minutes, be placed in 50 ℃ of constant temperature ovens and react 20min, be warmed up to 120 ℃ of insulation 15min then and finish polymerization reaction, clean repeatedly with ethanol and deionized water then, and in the benefit formation liquid p-methyl benzenesulfonic acid aqueous solution of 0.1wt% concentration, change into 40min again, in deionized water, clean afterwards and drying, repeat above-mentioned dipping, polymerization, change into again and cleaning-drying process 6 times, obtain first dielectric substrate, the agglomerate that will have first dielectric substrate then immerses second polymer fluid, second polymer fluid batching is added with 0.3wt% polyvinylpyrrolidone organic adhesive on first polymer fluid batching basis, the amount of polymer monomer increases to 4wt%, all the other batchings are with first polymer fluid, it operates dipping, and polymerization is cleaned, change into again and the operation of cleaning-drying with first dielectric substrate, 5 times repeatedly, obtain second dielectric substrate, thickness 15～20 μ m, apply low-temperature conductive graphite linings, conductive silver slurry layer at the conducting polymer skin then, finish the preparation of conductive cathode.The anode of lead frame and cathode weld are finished the encapsulation of resin bed then, form solid electrolytic capacitor.
Comparative example 1:
Make the capacitor pellet according to embodiment 1, just the prescription with pretreatment fluid changes following composition into: 3-methyl epoxy isopropyl silane 3%, camphorsulfonic acid 2%, water 30%, ethanol 65%; Apply low-temperature conductive graphite linings, conductive silver slurry layer at the conducting polymer skin then, finish the preparation of conductive cathode.
Comparative example 2:
Make the capacitor pellet according to embodiment 1, after just product forms oxidation film layer, do not carry out surface preparation, directly press embodiment 1 described process at the anode pellet and make conductive polymer coating, apply low-temperature conductive graphite linings, conductive silver slurry layer at the conducting polymer skin then, finish the preparation of conductive cathode.
Tantalum anode in the embodiment of the invention forms the dielectric oxide film product specification after dilute phosphoric acid solution changes into be 16V47 μ F, finishes all processes among the embodiment, and capacitance is tested under 120Hz, and the average size extraction rate reaches 98%.Equivalent series resistance is tested under 10KHz, 100KHz, 1000KHz, 2000KHz respectively, and leakage current is tested 30 seconds readings down in 1.2 times of rated voltages (being 19.2V).Following table 1 is respectively to implement the mean value of 20 samples:
Table 1
Data by last table as can be seen; the electrostrictive polymer electrolysis condenser that technical scheme of the present invention is produced has lower ESR value; adopt pretreatment fluid of the present invention and preconditioning technique; can the impurity defect in the electrolytic capacitor anodized film forming process be played a very good protection; thereby significantly reduce the leakage current of product; make the ESR value of product reduce with the variation of frequency simultaneously; improve the high frequency characteristics of product, can satisfy the specific (special) requirements of high frequency switch power filter circuit of new generation well.
Claims (9)
1. the processing method of electrolytic capacitor manufacture process medium oxide-film is characterized in that: increased anode pellet dielectric oxide film preprocessing process, may further comprise the steps:
Step 1: the valve metal powder is become the anode porous sintered body that has lead-in wire through mold pressing and vacuum-sintering, described valve metal powder specific volume〉50000 μ F/g, sintered density is 5.2～5.8g.cm
3, thickness is 0.6～1.2mm;
Step 2: adopt electrochemical method to form dielectric oxide film in the porous sintered surface of anode;
Step 3: anode pellet dielectric oxide film preliminary treatment;
Step 4: form the conducting high polymers layer in the porous sintered surface of the anode that has dielectric oxide film;
Step 5: coated graphite layer and silver slurry layer successively outside conducting high polymers thing layer, the used graphite of cathode conductive layer is the low temperature graphite of tool high conduction performance, its electric conductivity＜30 Ω .m-2, curing temperature＜100 ℃;
Step 6: form finished product by the mold pressing encapsulation.
2. the processing method of a kind of electrolytic capacitor manufacture process medium oxide-film according to claim 1, it is characterized in that: the preliminary treatment of the described anode pellet of described step 3 dielectric oxide film may further comprise the steps:
3.1: the pretreatment fluid of ratio preparation by volume, in the pretreatment fluid, to include concentration be 0.001mol/L～1mol/L, comprise the straight or branched of 1 to 10 carbon atom, the Ester of saturated or undersaturated polymerization anionic group, and the organic sulfonic acid of concentration＜5%, all the other solution are solvent;
3.2: pretreatment fluid is placed water bath with thermostatic control, and bath temperature is 25 ℃～50 ℃;
3.3: the capacitor anode pellet that will make oxidation film layer is completely infused in the pretreatment fluid, adopt D.C. regulated power supply to add the dc offset voltage of 5V at capacitor anode pellet two ends simultaneously, this direct voltage is generally anode pellet oxide-film and forms 10%～20% of voltage, and dip time is 10～15min;
3.4: the capacitor after will flooding well at first places 50 ℃ the dry 10min of baking oven, places 150 ℃ the dry 15～20min of baking oven then.
3. the processing method of a kind of electrolytic capacitor manufacture process medium oxide-film according to claim 1 and 2 is characterized in that: Ester described in the described step 3-3.1 is carbomethoxy, ethoxycarbonyl, propyl ester base, epoxy propyl ester base, isopropyl esters, epoxy isopropyl esters, butyl ester base, pentyl ester base and one or more in the ester group.
4. according to the manufacture method of each described electrolytic capacitor among the claim 1-3, it is characterized in that: the concentration of polymerization anionic group described in the described step 3-3.1 is 0.01mol/l～0.1mol/l.
5. according to the manufacture method of each described electrolytic capacitor among the claim 1-4, it is characterized in that: organic sulfonic acid is 1%～3% among the described step 3-3.1.
6. according to the manufacture method of each described electrolytic capacitor among the claim 1-5, it is characterized in that: solvent described in the described step 3-3.1 is water and ethanol.
7. according to the manufacture method of each described electrolytic capacitor among the claim 1-6, it is characterized in that: the content of water＜50% described in the described step 3-3.1.
8. according to the manufacture method of each described electrolytic capacitor among the claim 1-7, it is characterized in that: the content of water described in the described step 3-3.1 is 20～40%.
9. according to the manufacture method of each described electrolytic capacitor among the claim 1-8, it is characterized in that: be 30～35 ℃ among the described step 3-3.1.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489376A (en) * | 2016-01-14 | 2016-04-13 | 中国振华（集团）新云电子元器件有限责任公司 | Method for manufacturing high-reliability electrolytic capacitor |
| CN109994318A (en) * | 2019-03-06 | 2019-07-09 | 湖南艾华集团股份有限公司 | A kind of aluminium electrolutic capacitor and preparation method thereof |
| CN112490004A (en) * | 2020-11-23 | 2021-03-12 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Method for manufacturing electrolytic capacitor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01105523A (en) * | 1987-10-19 | 1989-04-24 | Japan Carlit Co Ltd:The | Solid electrolytic capacitor |
| CN101350253A (en) * | 2008-09-17 | 2009-01-21 | 中国振华（集团）新云电子元器件有限责任公司 | Solid electrolyte capacitor with ultra-low equivalent series resistance and manufacturing method thereof |
| CN101692412A (en) * | 2009-08-06 | 2010-04-07 | 中国振华（集团）新云电子元器件有限责任公司 | New type solid electrolytic capacitor and manufacturing method thereof |
-
2013
- 2013-05-28 CN CN201310202770.XA patent/CN103295787B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01105523A (en) * | 1987-10-19 | 1989-04-24 | Japan Carlit Co Ltd:The | Solid electrolytic capacitor |
| CN101350253A (en) * | 2008-09-17 | 2009-01-21 | 中国振华（集团）新云电子元器件有限责任公司 | Solid electrolyte capacitor with ultra-low equivalent series resistance and manufacturing method thereof |
| CN101692412A (en) * | 2009-08-06 | 2010-04-07 | 中国振华（集团）新云电子元器件有限责任公司 | New type solid electrolytic capacitor and manufacturing method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489376A (en) * | 2016-01-14 | 2016-04-13 | 中国振华（集团）新云电子元器件有限责任公司 | Method for manufacturing high-reliability electrolytic capacitor |
| CN105489376B (en) * | 2016-01-14 | 2018-06-05 | 中国振华（集团）新云电子元器件有限责任公司 | A kind of manufacturing method of high reliability electrolytic capacitor |
| CN109994318A (en) * | 2019-03-06 | 2019-07-09 | 湖南艾华集团股份有限公司 | A kind of aluminium electrolutic capacitor and preparation method thereof |
| CN109994318B (en) * | 2019-03-06 | 2021-01-26 | 湖南艾华集团股份有限公司 | Aluminum electrolytic capacitor and preparation method thereof |
| CN112490004A (en) * | 2020-11-23 | 2021-03-12 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Method for manufacturing electrolytic capacitor |
| CN112490004B (en) * | 2020-11-23 | 2022-08-19 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Method for manufacturing electrolytic capacitor |
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