| 摘要 |
A method of manufacturing solid electrolytic capacitors which prevents decrease in product yield due to degradation in characteristics of anode foil during a process of forming a MnO2 layer, and achieves high quality solid electrolytic capacitors with high yield, wherein aluminum foil is sampled from each lot before inputting the lot into the next process of forming MnO2 layer on a surface of aluminum foil, and a predetermined inspection is implemented after forming the MnO2 layer on this sample. Based on inspection results, the lot of the sample is input to the next process. This method prevents occurrence of defects in the MnO2 layer formation process in advance, and avoids finding defects after inputting the entire lot of aluminum foil to the MnO2 layer formation process. Consequently, highly reliable solid electrolytic capacitors are manufactured inexpensively and stably without loss in costs and efficiency.
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