Anode foils for electrolytic capacitors and methods for making same
US8992787B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2011 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Nov 23, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G9/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Anode foils suitable for use in electrolytic capacitors, including those having multiple anode 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 disposing a resist material in a predetermined pattern on an exposed surface of an anode foil substrate such that a first portion of the exposed surface of the anode foil substrate is covered by the resist material, and a second portion of the exposed surface remains uncovered; polymerizing the resist material; exposing at least the second portion of the exposed surface to one or more etchants so as to form a plurality of tunnels; stripping the polymerized resist material; and widening at least a portion of the plurality of tunnels. The resist material may be deposited, for example, by ink-jet printing, stamping or screen printing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.