Adding a cap-layer to improve magnetic recording media
AssigneeSeagate Technology LLC
InventorsPaul M. Jones, Hongbo Wang, Martin Blaber, Huan Tang
Life of this patent
Estimating the term…
Abstract
Systems and methods for adding a cap-layer to magnetic recording media are described. In one embodiment, the method may include depositing a magnetic recording layer over a substrate, depositing an interface layer over the magnetic recording layer, and depositing a carbon overcoat layer over the interface layer. In some cases, sputter deposition is used to deposit at least the interface layer. In some cases, oxygen is used as a background gas of the sputter deposition.
Claims14
A medium for heat assisted magnetic recording, the medium comprising:
- a magnetic recording layer;
- an interface layer on the magnetic recording layer;
- a carbon overcoat layer on the interface layer;
- a graded interface structure between the interface layer and the carbon overcoat layer, the graded interface structure in contact with the interface layer and including carbon atoms and atoms from a material of the interface layer, the graded interface structure having a carbide sublayer in contact with the carbon overcoat layer.
A method for heat assisted magnetic recording comprising:
- depositing a magnetic recording layer over a substrate;
- depositing an interface layer over the magnetic recording layer;
- and
- depositing a carbon overcoat layer over the interface layer, the carbon overcoat layer being deposited in conjunction with the interface layer to create a graded interface structure in contact with the interface layer, the graded interface structure having a carbide sublayer in contact with the carbon overcoat layer.
Dependencies are inferred from the claim text.