| 摘要 |
<p>Disclosed is a method for manufacturing a niobium solid electrolytic capacitor using niobium as a positive electrode body, which comprises a step of chemically converting the positive electrode body. The chemical conversion step is composed of a first chemical conversion step of forming a chemical conversion coating of the positive electrode body, a step of heating the positive electrode body having been subjected to the first chemical conversion step, and a second chemical conversion step of once again chemically converting the heated positive electrode body. In the first chemical conversion step and the second chemical conversion step, electrolytic chemical conversion is performed using a chemical conversion liquid, which contains a metal nitrate salt as an electrolyte, at a temperature from 40°C to the boiling point of the solvent. The heating step is performed at a temperature of 150-300°C. The method for manufacturing a niobium solid electrolytic capacitor can increase the stability of an oxide coating which functions as a dielectric body, thereby preventing increase in leakage current and improving the yield and reliability.</p> |
