Hermetic feedthrough
US8872035B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 1, 2012 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Apr 23, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3754
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hermetic feedthrough for an implantable medical device includes a sheet having a hole, where the sheet includes a ceramic comprising alumina. The feedthrough also includes a second material substantially filling the hole, where the second material includes a platinum powder mixture and an alumina additive. The platinum powder mixture includes a first platinum powder having a median particle size of between approximately 3 and 10 micrometers and a second platinum powder that is coarser than the first platinum powder and has a median particle size of between approximately 5 and 20 micrometers. The platinum powder mixture includes between approximately 50 and 80 percent by weight of the first platinum powder and between approximately 20 and 50 percent by weight of the second platinum powder. The first and second materials have a co-fired bond therebetween that hermetically seals the hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.