Electrode foil for capacitor and electrolytic capacitor using the electrode foil
AssigneePanasonic Corporation
InventorAkiyoshi Oshima
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Abstract
An electrode foil for capacitor includes a substrate made of valve metal and a rough-surface layer on the substrate. The rough-surface layer includes a base layer on the substrate and a cover layer on the base layer. The base layer includes first fine particles made of valve metal. The cover layer includes second fine particles made of valve metal. The first fine particles have an average particle diameter larger than that of the second fine particles. This electrode foil has the rough-surface layer that can be produced stably by vapor deposition and provides an electrolytic capacitor having a large capacitance.
Claims16
An electrode foil for capacitor comprising:
- a substrate made of a valve metal foil having a surface;
- and
- a rough-surface layer including
- a base layer provided on the surface of the substrate, the base layer including a plurality of first fine particles made of valve metal, and
- a cover layer provided on the base layer, the cover layer including a plurality of second fine particles made of valve metal,
- wherein the plurality of first fine particles have an average particle diameter larger than an average particle diameter of the plurality of second fine particles.
Dependencies are inferred from the claim text.