CN108648913B - Solid-state aluminum electrolytic capacitor - Google Patents
Solid-state aluminum electrolytic capacitor Download PDFInfo
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- CN108648913B CN108648913B CN201810309964.2A CN201810309964A CN108648913B CN 108648913 B CN108648913 B CN 108648913B CN 201810309964 A CN201810309964 A CN 201810309964A CN 108648913 B CN108648913 B CN 108648913B
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- aluminum electrolytic
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 41
- 239000003990 capacitor Substances 0.000 title claims abstract description 23
- 239000004642 Polyimide Substances 0.000 claims abstract description 13
- 229920001721 polyimide Polymers 0.000 claims abstract description 13
- 239000011241 protective layer Substances 0.000 claims abstract description 12
- 229920005575 poly(amic acid) Polymers 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims abstract description 7
- 230000018044 dehydration Effects 0.000 claims abstract description 6
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 6
- 229920001940 conductive polymer Polymers 0.000 claims abstract description 3
- 239000011888 foil Substances 0.000 claims description 26
- 238000005470 impregnation Methods 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 150000004985 diamines Chemical class 0.000 claims description 5
- 238000006068 polycondensation reaction Methods 0.000 claims description 5
- MHABMANUFPZXEB-UHFFFAOYSA-N O-demethyl-aloesaponarin I Natural products O=C1C2=CC=CC(O)=C2C(=O)C2=C1C=C(O)C(C(O)=O)=C2C MHABMANUFPZXEB-UHFFFAOYSA-N 0.000 claims description 2
- 239000012046 mixed solvent Substances 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims 1
- 239000002253 acid Substances 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- 229920002647 polyamide Polymers 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 5
- 238000007493 shaping process Methods 0.000 abstract description 4
- 239000005030 aluminium foil Substances 0.000 abstract description 2
- 239000002322 conducting polymer Substances 0.000 abstract description 2
- 239000004411 aluminium Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 239000000243 solution Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 230000032683 aging Effects 0.000 description 4
- 238000005253 cladding Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000010000 carbonizing Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000002431 foraging effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002798 polar solvent Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/0003—Protection against electric or thermal overload; cooling arrangements; means for avoiding the formation of cathode films
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/14—Structural combinations or circuits for modifying, or compensating for, electric characteristics of electrolytic capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/15—Solid electrolytic capacitors
- H01G9/151—Solid electrolytic capacitors with wound foil electrodes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
Abstract
The utility model provides a solid-state aluminum electrolytic capacitor, is formed the core package by positive negative pole paper tinsel and electrolytic paper winding, and the riveting has the lead wire on the positive negative pole paper tinsel, and the lead wire on the core package passes gluey consent and is in the same place with the aluminium hull assemblage, wherein, the core package internal growth has conducting polymer, and the aluminium foil of core package upper and lower surface cuts the department shaping and has polyimide material flooding protective layer, polyimide material flooding protective layer heats to 220 ~ 320 ℃ dehydration shaping behind the soluble polyamic acid solution by the upper and lower surface flooding of the core package of coiling shaping. The invention can effectively improve the high ripple current resistance of the product; meanwhile, the position defect of the cut edge can be effectively protected, the leakage current of the product is reduced, and the reliability of the product is improved.
Description
Technical Field
The invention relates to the technical field of preparation of solid-state capacitors, in particular to a solid-state aluminum electrolytic capacitor.
Background
In the prior art, the core package of the solid-state aluminum electrolytic capacitor is mainly formed by riveting a lead wire with a cut aluminum foil and winding the aluminum foil with an electrolytic paper, wherein the aluminum substrate on the detachable edge is exposed due to the fact that the aluminum foil is directly cut and formed on the cut edge of the aluminum foil, and the defect of the aluminum substrate is repaired by adopting a formation mode at present, so that the leakage current of a product is reduced.
However, the aluminum foil formed by the formation method still has a great risk of defects, the aluminum oxide film grown on the surface of the aluminum foil through short-time formation is not necessarily completely covered, and the aluminum oxide film has different thicknesses, so that the product still has a great risk of leakage current, and the cutting burrs existing in the product are also main factors causing breakdown failure of the capacitor.
Disclosure of Invention
The present invention is directed to a solid-state aluminum electrolytic capacitor, which has the characteristics of low leakage current, high reliability, and high ripple current resistance, and can be used to solve the above-mentioned drawbacks in the background art.
The technical problem solved by the invention is realized by adopting the following technical scheme:
the utility model provides a solid-state aluminum electrolytic capacitor, is rolled up by positive negative pole paper tinsel and electrolysis paper and forms the core package, and the riveting has the lead wire on the positive negative pole paper tinsel, and the lead wire on the core package passes gluey consent and assembles together with the aluminum hull, wherein, the core package internal growth has conducting polymer, and the aluminium foil of core package upper and lower surface cuts the department shaping and has polyimide material flooding protective layer. The polyimide material dipping protective layer is formed by dipping the upper surface and the lower surface of a winding core bag in a soluble polyamic acid solution, and then heating to 220-320 ℃ for dehydration forming; the soluble polyamic acid solution is prepared by adding dianhydride and diamine into a polar solvent according to the mass ratio of 1: 0.5-1: 2, and controlling the temperature to be 3-15 ℃ for low-temperature polycondensation.
In the present invention, the core package dehydration forming temperature after completion of the impregnation is preferably 300 ℃.
In the present invention, the preferable addition mass ratio of dianhydride and diamine in the soluble polyamic acid is 1: 1.2.
In THE present invention, THE polar solvent is one of DMF, DMAC, NMP or THE he/methanol mixed solvent, and is preferably DMF.
In the present invention, the temperature of the low-temperature polycondensation operation is preferably 6 ℃.
A preparation method of a solid-state aluminum electrolytic capacitor is used for preparing the solid-state aluminum electrolytic capacitor and comprises the following operation steps:
1) the anode foil, the cathode foil and the electrolytic paper are cut into the width specified by the process according to the process requirements.
2) Riveting a positive guide pin nail on the anode aluminum foil, riveting a negative guide pin on the cathode aluminum foil, and clamping the electrolytic paper between the anode foil and the cathode foil and winding the electrolytic paper into a cylindrical core package.
3) And immersing the wound core cladding into formation electrolyte for electrifying formation, repairing the defects of the electrode foil and growing an aluminum oxide film on the defect parts.
4) And carbonizing the formed core package to carbonize the electrolytic paper therein.
5) And respectively soaking the upper surface and the lower surface of the carbonized core bag in the soluble polyamic acid solution prefabricated by the method, taking out the core bag when the soluble polyamic acid solution is uniformly soaked in the core bag, and heating and dehydrating to form the polyimide protective layer.
6) Impregnating the core wrap treated in the step 5) with a pretreatment agent, and then impregnating the core wrap with a conductive high molecular monomer and an oxidant.
7) And (3) polymerizing and assembling the core cladding treated by the impregnated conductive high molecular monomer and the oxidant in sequence, cleaning the surfaces of the aluminum shell and the lead, and then sending the core cladding into an aging treatment unit for aging treatment to insulate the polymer at the defective part of the aluminum foil, thus obtaining the finished product of the solid aluminum electrolytic capacitor.
Has the advantages that: the solid-state aluminum electrolytic capacitor prepared by the invention has a simple structure, the preparation process is convenient and easy to operate, the polyimide protective layers are formed on the upper surface and the lower surface of the core cladding, on one hand, the structure can form a heat conduction path by contacting the polyimide protective layer with an aluminum shell, so that the product can resist high ripple current, on the other hand, the polyimide protective layer can cover the cutting part of the aluminum foil, the insulation performance of the polyimide is utilized to protect the cutting defect position, the leakage current of the product is reduced, the probability of product failure caused by burrs is reduced, and the reliability of the product is improved.
Drawings
Fig. 1 is a schematic diagram of a core package structure of a solid-state aluminum electrolytic capacitor according to the present invention.
Wherein: 1. a core package; 2. a polyimide material impregnation protective layer; 3. and (6) guiding the needle.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the invention is further described with reference to the specific embodiments and the drawings.
In the examples, the same batch of 25V-470 μ F solid aluminum electrolytic capacitors prepared by the structure and preparation method of the present invention is taken as an example, and a conventional batch of 25V-470 μ F solid aluminum electrolytic capacitors prepared by the conventional preparation method is taken as a technical comparison.
In the embodiment, when the structure and the preparation method of the invention are used for preparing the solid-state aluminum electrolytic capacitor, the soluble polyamic acid solution is prepared firstly, and the dianhydride and the diamine are added into the DMF solvent according to the mass ratio of 1:1.2, and the temperature is controlled at 6 ℃ for low-temperature polycondensation.
Cutting an anode foil, a cathode foil and electrolytic paper into a process specified width according to process requirements, riveting a positive guide pin on the anode aluminum foil, riveting a negative guide pin on the cathode aluminum foil, clamping the electrolytic paper between the anode foil and the cathode foil, winding the electrolytic paper into a cylindrical shape, immersing a wound core package into a formed electrolyte to carry out electrification to repair the defects of the electrode foil, growing an aluminum oxide film on the defect part, wherein the electrification voltage is the withstand voltage of the anode foil during the formation operation; the formation electrolyte is an aqueous solution of ammonium dihydrogen phosphate, and the mass fraction of the formation electrolyte is 0.6%; drying for 2h at 150 ℃ after formation; and carbonizing the dried core package to carbonize the electrolytic paper therein.
Then, the upper surface and the lower surface of the core package subjected to the carbonization treatment of the electrolytic paper are respectively soaked in a prefabricated soluble polyamic acid solution, the core package is taken out when the soluble polyamic acid solution is uniformly soaked in the core package, and the core package is heated to 300 ℃ for dehydration forming, so that polyimide protective layers are formed on the upper surface and the lower surface of the core package, and the forming structure is shown in fig. 1. Then, immersing the core wrap into a monomer ethanol solution for impregnation, firstly, immersing for 2-3 min under the conditions of normal temperature and normal pressure, and then, drying for 1-2 h under the condition of 50-60 ℃ to complete the impregnation operation; immersing the core package impregnated with the monomer ethanol solution into an oxidant solution, impregnating for 8-10 min under the vacuum condition of air pressure of-80 to-30 kPa, putting the core package into an oven for polymerization, sealing the polymerized core package in an aluminum shell with a rubber plug for aging, controlling the aging temperature to be 105 ℃ and the aging voltage to be less than or equal to 1.2 times of the working voltage, and aging for 120-130 min in total to obtain the finished product of the solid aluminum electrolytic capacitor.
The solid capacitor prepared by the method and products of different batches produced by the traditional process are randomly sampled to obtain 10 individual units, and the measured data of the two units are compared as shown in the following table:
TABLE 1 Electrical Properties of the 25V-470 uF products of the present invention and those made by conventional processes
The data show that the product manufactured by the process is comprehensively superior to the product manufactured by the traditional process, the product consistency is far superior to the traditional process, the performance is more stable, the yield is higher, and the leakage current value is lower.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A solid-state aluminum electrolytic capacitor is characterized in that a core package is formed by winding positive and negative electrode foils and electrolytic paper, leads are riveted on the positive and negative electrode foils, the leads on the core package penetrate through glue plug holes and are assembled with an aluminum shell, wherein a conductive polymer grows in the core package, polyimide material impregnation protective layers are formed at aluminum foil cutting positions of the upper surface and the lower surface of the core package, the polyimide material impregnation protective layers adopt a soluble polyamide acid solution as an impregnation solution, the upper surface and the lower surface of the core package formed by winding are uniformly impregnated in the impregnation solution and then taken out, and the core package is heated to 220-320 ℃ for dehydration forming; THE soluble polyamic acid solution is prepared by adding one of DMF, DMAC, NMP or THE/methanol mixed solvent into dianhydride and diamine according to THE mass ratio of 1: 0.5-1: 2, and carrying out low-temperature polycondensation at THE temperature of 3-15 ℃.
2. The solid aluminum electrolytic capacitor according to claim 1, wherein the dianhydride and the diamine are added in a mass ratio of 1: 1.2.
3. The solid state aluminum electrolytic capacitor of claim 1 wherein the temperature of the low temperature polycondensation operation is 6 ℃.
4. The solid aluminum electrolytic capacitor according to claim 1, wherein the core package dehydration forming temperature after completion of the impregnation is 300 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810309964.2A CN108648913B (en) | 2018-04-09 | 2018-04-09 | Solid-state aluminum electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810309964.2A CN108648913B (en) | 2018-04-09 | 2018-04-09 | Solid-state aluminum electrolytic capacitor |
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| CN108648913A CN108648913A (en) | 2018-10-12 |
| CN108648913B true CN108648913B (en) | 2020-01-21 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109712813B (en) * | 2018-12-13 | 2021-04-13 | 益阳市万京源电子有限公司 | Carbon aid for comprehensive high-molecular aluminum electrolytic capacitor and use method thereof |
| CN109727777A (en) * | 2018-12-13 | 2019-05-07 | 益阳市万京源电子有限公司 | The preparation method of comprehensive high molecular aluminium electrolytic capacitor |
| CN109659139B (en) * | 2019-01-15 | 2024-02-06 | 深圳江浩电子有限公司 | Solid electrolytic capacitor and preparation method thereof |
| CN110676058B (en) * | 2019-08-08 | 2021-10-08 | 益阳艾华富贤电子有限公司 | Preparation process of solid-state aluminum electrolytic capacitor and solid-state aluminum electrolytic capacitor |
| CN110676055A (en) * | 2019-10-15 | 2020-01-10 | 厦门法拉和信电子有限公司 | Two-step impregnation preparation method of hybrid aluminum electrolytic capacitor |
| CN110993354A (en) * | 2019-12-02 | 2020-04-10 | 湖南艾华集团股份有限公司 | Manufacturing method of solid-state aluminum electrolytic capacitor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1685456A (en) * | 2002-09-30 | 2005-10-19 | 日本贵弥功株式会社 | Method for producing solid electrolytic capacitor |
| CN101210072A (en) * | 2006-12-27 | 2008-07-02 | 比亚迪股份有限公司 | Polyimide material and preparation 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8305734B2 (en) * | 2010-10-19 | 2012-11-06 | Apaq Technology Co., Ltd. | Insulating encapsulation structure for solid chip electrolytic capacitor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1685456A (en) * | 2002-09-30 | 2005-10-19 | 日本贵弥功株式会社 | Method for producing solid electrolytic capacitor |
| CN101210072A (en) * | 2006-12-27 | 2008-07-02 | 比亚迪股份有限公司 | Polyimide material and preparation 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 |
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