Dual layer diffusion bonded chemical vapor coating for medical implants
US7393589B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2005 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Jan 28, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C16/403
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Coatings for use in artificial joints and other implanted medical devices. The coatings comprise a dual layer structure vapor deposited atop a medical grade substrate, such as cobalt chromium. The dual layer structure comprises a first ceramic layer vapor deposited atop at least a portion of the substrate and a second ceramic layer deposited atop the first ceramic layer. The first ceramic layer is formed of a material which has particularly good adhesion to the substrate, and the second ceramic layer from a material exhibiting particularly high hardness and good wear characteristics. The vapor deposition process is controlled so as to form a graded interface between the two ceramic layers to form a dual layer coating which resists delamination, adheres well to the substrate, and exhibits good wear characteristics in situ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.