Solid electrolytic capacitor
AssigneeNippon Chemi-Con Corporation
InventorsKenta SATO, Kenji MACHIDA, Katsumi MOGAKI, Kyohei YOSHIOKA
Life of this patent
Estimating the term…
Abstract
A solid electrolytic capacitor with both low ESR and high withstand voltage is provided. The solid electrolytic capacitor includes a capacitor element having anode foil, a cathode body, and an electrolyte. A surface of the anode foil is enlarged by tunnel-shaped etching pits and has dielectric film. The cathode body faces the anode foil. The electrolyte includes a solid electrolyte layer containing a conductive polymer. A weight of the conductive polymer is 11 mg/cm3 or less per unit volume of the capacitor element.
Claims13
A solid electrolytic capacitor comprising a capacitor element having anode foil, cathode body, and an electrolyte, wherein:
- a surface of the anode foil is enlarged by tunnel-shaped etching pits and has dielectric film,
- the cathode body faces the anode foil, the electrolyte includes a solid electrolyte layer containing a conductive polymer, and
- a weight of the conductive polymer is 11 mg/cm3 or less per unit volume of the capacitor element.
A manufacturing method of a solid electrolytic capacitor, comprising:
- an anode foil formation process of enlarging a surface of anode foil by tunnel-shaped etching pits and forming dielectric film on the surface of the anode foil;
- an element formation process of forming a capacitor element by making the anode foil and a cathode body to face each other;
- and
- a solid electrolyte formation process of forming a solid electrolyte layer containing a conductive polymer in the capacitor element in a ratio of 11 mg/cm3 or less per unit volume of the capacitor element.
Dependencies are inferred from the claim text.