Back to results
US 12,236,987 B2Granted
Magnetic recording media with metal-doped capping layer
AssigneeWestern Digital Technologies, Inc.
InventorYoshihiro Ikeda
Life of this patent
Estimating the term…
Abstract
Various apparatuses, systems, methods, and media are disclosed to provide a magnetic recording medium that capping layer doped with an effective amount of metal to control grain-to-grain exchange coupling in a capping layer. A magnetic recording medium includes a substrate, a magnetic recording layer (MRL) on the substrate, and a capping layer on the MRL. The capping layer include Co and is doped with a metal (e.g., Ru or Ta) in a range from 1 atomic percent to 5 atomic percent, inclusive.
Claims11
A magnetic recording medium comprising:
- a substrate;
- a magnetic recording layer (MRL) on the substrate;
- and
- an etched capping layer comprising CoCrPtBRu directly on the MRL,
- wherein a thickness of the etched capping layer is in a range from 11 Å to 15 Å, inclusive,
- wherein the etched capping layer comprises Cr at 4.5 to 6.5 atomic percent and is doped with Ru in a range from 1 atomic percent to 5 atomic percent, inclusive,
- wherein the etched capping layer comprises a magnetic layer that is furthest from the substrate among all magnetic layers in the magnetic recording medium, and
- wherein a surface roughness of the etched capping layer is less than 4 Angstrom (Å).
5 more elements
Dependencies are inferred from the claim text.