Using etch resist patterns and formation for facilitation of laser cutting, particle and leakage current reduction
US9852849B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2016 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | May 27, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G9/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for creating an anode foil for use in an electrolytic capacitor of an implantable cardioverter defibrillator is provided. The process includes placing a partially masked bulk metal foil in an etch electrolyte solution to etch exposed area of the bulk metal foil, removing the etch-resistant mask to expose the unetched areas, widening the bulk metal foil, and partially cutting the bulk metal foil between a plurality of unetched areas to form a partially detached etched foil anode, such that the unetched areas are not cut and the unetched areas serve as attachment tabs to keep the partially detached etched foil anode attached to the bulk metal foil. Additionally, the process may include an oxide formation step, wherein the step of partially cutting the bulk metal foil is performed after the etching and widening steps, and before the oxide formation step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.