Low equivalent series resistance RF filter for an active implantable medical device
US10596369B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2018 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Sep 5, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H1/0007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hermetically sealed filtered feedthrough assembly includes an electrically conductive ferrule sealed by a first gold braze to an insulator disposed at least partially within a ferrule opening. A conductive wire is disposed within a via hole disposed through the insulator extending from a body fluid side to a device side. A second gold braze hermetically seals the conductive leadwire to the via hole. A capacitor is disposed on the device side having a capacitor dielectric body with a dielectric constant k that is greater than 0 and less than 1000. The capacitor is the first filter capacitor electrically connected to the conductive leadwire coming from the body fluid side into the device side. An active electrical connection electrically connects the conductive leadwire to the capacitor active metallization. A ground electrical connection electrically connects the capacitor ground metallization to the ferrule and housing of the active implantable medical device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.