METHOD FOR MANUFACTURING SOLID ELECTROLYTIC CAPACITOR

摘要

A first conductive polymer solution in which fine particles of a conductive polymer are dispersed is applied to a dielectric layer of aluminum oxide, and this solution is dried to form a first conductive polymer layer. Next, a coating solution is applied to the first conductive polymer layer, this solution containing at least one selected from an aromatic sulfonic acid having, in one molecule of the acid, a carboxyl group and a hydroxyl group, or two carboxyl groups, and a salt of the aromatic sulfonic acid. The solution is then dried to form a coating layer. Next, a second conductive polymer solution is applied to the coating layer, the solution being a solution in which fine particles of a conductive polymer are dispersed. This solution is then dried to form a second conductive polymer layer. This process gives a solid electrolyte layer of a capacitor element.

主权项

1. A method for manufacturing a solid electrolytic capacitor comprising a capacitor element having a dielectric layer and a solid electrolyte layer, the method comprising the following steps to be carried out sequentially:
a first step of applying a first conductive polymer solution in which fine particles of a conductive polymer are dispersed, and drying the solution to form a first conductive polymer layer; a second step of applying, to the first conductive polymer layer, a coating solution containing at least one selected from an aromatic sulfonic acid having, in one molecule of the acid, a carboxyl group and a hydroxyl group, or two carboxyl groups, and a salt of the aromatic sulfonic acid, and drying the coating solution; and a third step of applying, to a coating layer formed in the second step, a second conductive polymer solution in which fine particles of a conductive polymer are dispersed, and drying the solution to form a second conductive polymer layer.