Substrate coated with a layered structure comprising a tetrahedral carbon coating
US7820293B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2006 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Aug 11, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to a metal substrate (11) coated at least partially with a layered structure. The layered structure comprises an intermediate layer (14) deposited on said substrate (11) and a tetrahedral carbon layer (16) deposited on said intermediate layer. The intermediate layer comprises at least one amorphous carbon layer having a Young's modulus lower than 200 GPa and the tetrahedral carbon layer has a Young's modulus higher than 200 GPa. The invention further relates to a method to improve the adhesion of a tetrahedral carbon layer to a substrate and to a method to bridge the gap in Young's modulus of the metal substrate and the Young's modulus of a tetrahedral carbon coating deposited on said metal substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.