Metal foil for producing electrode foil, method for producing electrode foil for electrolytic capacitor use, electrode foil for electrolytic capacitor use, and electrolytic capacitor
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMitsuhisa YOSHIMURA, Toshifumi KADOKAWA, Masami TSUBAKI
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Abstract
A method for producing an electrode foil for electrolytic capacitor use includes: preparing a raw material foil; and etching the raw material foil. The raw material foil contains a valve metal, and has a plurality of recesses that open on a main surface thereof and that are arranged to be distributed in a dot-like manner in the direction of the main surface. The opening diameter of the recesses is 2 μm or more.
Claims22
A metal foil used for producing an electrode foil for electrolytic capacitor use, comprising
- a valve metal, wherein
- the metal foil has a plurality of recesses that open on a main surface of the metal foil and that are arranged to be distributed in a dot-like manner in a direction of the main surface, and
- an opening diameter of the recesses is 2 μm or more.
An electrode foil for electrolytic capacitor use comprising
- a metal foil containing a valve metal, wherein
- the metal foil has a plurality of recesses that open on a main surface of the metal foil and that are arranged to be distributed in a dot-like manner in a direction of the main surface,
- the metal foil has a porous portion having pores that open on the main surface of the metal foil and inner wall surfaces of the recesses,
- an opening diameter of the recesses is 2 μm or more, and
- an opening diameter of the pores of the porous portion is less than 2 μm.
Dependencies are inferred from the claim text.