Passivated nitrogenated diamond-like carbon layer and method for passivating it
US10783916B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2017 |
| Grant date | Sep 22, 2020 |
| Priority date | — |
| Expiry date | Sep 27, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/725
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A nitrogenated diamond-like carbon (DLC) layer, like a nitrogenated DLC overcoat on a magnetic recording disk, includes cyanoacrylates that are attached to nitrogenated sites on the surface of the carbon layer. Cyanoacrylates are reactive with surface amine groups, which are among the nitrogenated surface sites that act as adsorption sites for volatile contaminants in the disk drive. The covalent bonding of the cyanoacrylate with the amine groups and other reactive sites on the disk overcoat blocks the adsorption of contaminants when they impinge on the overcoat surface. The cyanoacrylate may be applied to the overcoat by dipping the disk into a solution containing the cyanoacrylate or by exposing the overcoat to a cyanoacrylate vapor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.