Patent ID: 11915885
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A method for manufacturing an electrolytic capacitor comprising:
a first step of forming a first dielectric layer including Al2O3 by anodizing a base material including aluminum so that the first dielectric layer covers at least a part of the base material; and
a second step of forming a second dielectric layer including SiO2 and having a thickness T2 smaller than a thickness T1 of the first dielectric layer so that the second dielectric layer covers at least a part of the first dielectric layer to obtain an electrode foil, wherein:
a total thickness of the thickness T1 of the first dielectric layer and the thickness T2 of the second dielectric layer ranges from 7 nm to 12.5 nm, inclusive, and
in the second step, the second dielectric layer is formed so that a ratio T1/T2 of the thickness T1 of the first dielectric layer to the thickness T2 of the second dielectric layer is more than 1 and less than or equal to 20.