Media underlayer structure for heat-assisted magnetic recording and media fabrication methods therefor
AssigneeWestern Digital Technologies, Inc.
InventorsPierre-Olivier Jubert, Hoan Cong Ho, Paul Christopher Dorsey
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Abstract
Various apparatuses, systems, methods, and media are disclosed for heat-assisted magnetic recording (HAMR) that includes a HAMR medium with a seed-thermal barrier structure. The seed-thermal barrier structure is positioned between a heat sink layer and a magnetic recording layer. In some examples, the seed-thermal barrier structure has a first layer including MgOTiO (MTO), a second layer including TiN on the first layer, a third layer on the second layer, and a fourth layer including MTO on the third layer. The third layer, in some examples, includes at least one of: RuAl, Pt, PtZr, PtTa, Rh, FePt, CrMo, or Cr.
Claims20
A magnetic recording medium, comprising:
- a substrate;
- a heat sink layer on the substrate;
- an underlayer structure on the heat sink layer, wherein the underlayer structure includes a first layer comprising MgOTiO (MTO) on the heat sink layer, a second layer comprising TiN on the first layer, a third layer on the second layer, and a fourth layer comprising MTO on the third layer;
- and
- a magnetic recording layer structure on the fourth layer.
A magnetic recording medium, comprising:
- a substrate;
- a heat sink layer on the substrate;
- a first MgOTiO (MTO) layer on the heat sink layer, wherein the first MTO layer comprises MTO;
- a first TiN layer directly on the first MTO layer, wherein the first TiN layer comprises TiN;
- a first middle thermal barrier layer directly on the first TiN layer;
- a second MTO layer directly on the first middle thermal barrier layer, wherein the second MTO layer comprises MTO;
- and
- a magnetic recording layer structure on the second MTO layer.
A method for manufacturing a magnetic recording medium, the method comprising:
- providing a substrate;
- providing a heat sink on the substrate;
- providing a first layer comprising MgOTiO (MTO) on the heat sink;
- causing a reactive gas comprising N2 to flow in a chamber containing the first layer to form a second layer on the first layer, wherein the second layer comprises TiN;
- providing a third layer on the second layer;
- providing a fourth layer comprising MTO on the third layer;
- and
- providing a magnetic recording layer structure on the fourth layer.
Dependencies are inferred from the claim text.