Oxide on edges of metal anode foils
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United States of America Patent
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Feb 16, 2021
Grant Date -
Aug 23, 2018
app pub date -
Apr 20, 2018
filing date -
Jan 11, 2016
priority date (Note) -
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Abstract
A capacitor and a method of processing an anode metal foil are presented. The method includes electrochemically etching the metal foil to form a plurality of tunnels. Next, the etched metal foil is disposed within a widening solution to widen the plurality of tunnels. Exposed surfaces of the etched metal foil are then oxidized. The method includes removing a section of the etched metal foil, where the section of the etched metal foil includes exposed metal along an edge. The section of the etched metal foil is placed into a bath comprising water to form a hydration layer over the exposed metal on the section of the etched metal foil. The method also includes assembling the section of the etched metal foil having the hydration layer as an anode within a capacitor.
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