Co-fired hermetically sealed feedthrough with alumina substrate and platinum filled via for an active implantable medical device
USRE47624E1 · kind E1 · reissue
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2016 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Feb 5, 2036 |
Classification
- Technology area (CPC —)General
Abstract
A co-fired hermetically sealed feedthrough is attachable to an active implantable medical device. The feedthrough comprises an alumina dielectric substrate comprising at least 96 or 99% alumina. A via hole is disposed through the alumina dielectric substrate from a body fluid side to a device side. A substantially closed pore, fritless and substantially pure platinum fill is disposed within the via hole forming a platinum filled via electrically conductive between the body fluid side and the device side. A hermetic seal is between the platinum fill and the alumina dielectric substrate, wherein the hermetic seal comprises a tortuous and mutually conformal interface between the alumina dielectric substrate and the platinum fill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.