Aluminum electrolytic capacitor Manufacturing Process
Manufacturing Process of aluminum electrolytic capacitors is as follows.
| ① Etching (for extending the surface area) |
This etching process serves to extend the surface area of the aluminum foil. This is an AC or DCcurrent-employed electrochemical process for etching the foil surface in a chloride solution. |
 Etching Model
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|---|---|---|
| ② Formation (for forming a dielectric) |
This etching process serves to extend the surface area of the aluminum foil. This is an AC or DCcurrent-employed electrochemical process for etching the foil surface in a chloride solution. |  Forming Model |
| ③ Slitting | This is a process for slitting aluminum foils (both the anode and cathode) and paper separators to the specified product size. |  Slitting Model |
| ④ Winding | This is a process for rolling a set of anode and cathode foils into a cylindrical form with a paper separator inserted between them. During this process, an inner terminal (called a tab) is attached to each of the aluminum foils. The roll made at this process is called a capacitor element. |  Cathode Foil |
| ⑤ Impregnation | This is a process for impregnating the element with electrolyte as a true cathode. The electrolyte also functions to repair the dielectric layer. |  Impregnation |
| ⑥ Sealing | This process seals the element using the aluminum can case and sealing materials (rubber,rubberlined cover, etc.) for keeping the case airtight. |  |
| ⑦ Aging (reforming) |
The process of applying voltage to a post-sealed capacitor at high temperature is called “aging”. This serves to repair defective dielectrics that have been made on the foil during the slitting or winding process.g the slitting or winding process. | |
| ⑧ 100% inspection and packaging | After the aging, all products shall undergo testing for checking their electrical characteristics with chip termination, lead reforming, taping etc. finished, and then be packaged. | |
| ⑨ Outgoing inspections | Outgoing inspections are performed as per standard inspection procedures | |
| ⑩ Shipment |
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