Leak testable capacitive filtered feedthrough for an implantable medical device
US6349025B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2000 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | Oct 25, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3754
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A filtered feedthrough that does not block passage of gas in a helium leak test and enables testing of the hermeticity of the feedthrough while inhibiting high voltage arcing is disclosed in single filtered feedthrough and multiple filtered feedthrough array configurations. Each filtered feedthrough comprises a ferrule, an insulator, a feedthrough pin, a filter element, and a pre-formed insulative barrier or spacer located in an interior space between the feedthrough insulator and the filter element rather than a non-conductive adhesive filling the interior space. A gas flow path or pathway extends from the interior space to the exterior of the feedthrough bypassing each filter element. Any leak test gas applied in a hermeticity test and passing through defects in the feedthrough insulator or its attachment to the feedthrough pin or ferrule enters the interior space. The gas pathway extends from an interior space through one or more side wall hole of the ferrule and/or through one or more gap between the ferrule interior surface and the outer surface of the filter element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.