METHOD FOR MAKING ELECTRODE FOILS HAVING REDUCED PARTICLE DETACHMENT AND REDUCED LEAKAGE CURRENT

摘要

Electrode foils suitable for use in electrolytic capacitors, including those having multiple configurations, have improved strength, reduced brittleness, and increased capacitance compared to conventional anode foils for electrolytic capacitors. Exemplary methods of manufacturing an anode foil suitable for use in an electrolytic capacitor include forming a pattern of etch resist on a surface of a substrate; etching a first area of the surface substantially enclosed by the pattern and a second area in intervals between the pattern to form tunnels in first and second areas of the surface; and removing the resist material revealing a non-etched frame. The resist material may be deposited, for example, by ink-jet printing, stamping or screen printing. Additionally, an etch resist pattern may be used to form strength lines on the substrate surface.

主权项

1. A method of making an electrode, comprising:
forming, on a surface of a substrate, an intermittent etch resist pattern having mask elements separated by space intervals, wherein the etch resist pattern substantially outlines a peripheral edge of the electrode, defines a first area within the peripheral edge, and defines a second area including the space intervals of the etch resist pattern, wherein the first area is substantially enclosed by the second area; etching the first area and the second area to form tunnels in the surface of the substrate in the first and second areas; and removing the resist material revealing a non-etched intermittent frame.