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US 11,763,845 B2Granted
Magnetic stack including non-magnetic seed layer for hard disk drive media
AssigneeSeagate Technology LLC
InventorsFlorin Zavaliche, Kai Chieh Chang, Pin-Wei Huang, Ganping Ju, Jan-Ulrich Thiele
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Abstract
A magnetic stack includes a substrate and a soft magnetic underlayer deposited on a top surface of the substrate. A heat sink layer is disposed on top of the soft magnetic underlayer, and an interlayer is deposited on top of the heat sink layer. A non-magnetic seed layer is deposited on top of the interlayer. A magnetic recording structure which includes more than one magnetic recording layer is deposited on the top surface of the non-magnetic seed layer.
Claims16
A magnetic stack comprising:
- a substrate;
- a soft magnetic underlayer disposed on a top surface of the substrate;
- a heat sink layer disposed on top of the soft magnetic underlayer;
- an interlayer disposed on a top surface of the heat sink layer;
- a non-magnetic seed layer disposed on a top surface of the interlayer, wherein the non-magnetic seed layer comprises AlN, GaN, AlGaN or combinations thereof, and wherein the non-magnetic seed layer is doped with Fe, Pt, Co, Au, Ag, Cu, Pd, FePt or combinations thereof;
- and
- a magnetic recording structure disposed on a top surface of the non-magnetic seed layer wherein the magnetic recording structure comprises a plurality of magnetic recording layers.
4 more elements
A magnetic stack comprising:
- a substrate,
- a soft magnetic underlayer disposed on a top surface of the substrate,
- a heat sink layer disposed on a top surface of the soft magnetic underlayer, an interlayer disposed on a top surface of the heat sink layer;
- and
- a magnetic recording structure disposed on top of a non-magnetic seed layer, wherein the
- magnetic recording structure comprises a plurality of magnetic recording layers;
- and
- wherein the plurality of magnetic recording layers comprise a plurality of magnetic grains
- surrounded by a segregant, wherein the segregant comprises GaN or AlGaN.
6 more elements
A method comprising the steps of:
- providing a substrate,
- forming a soft magnetic underlayer on a top surface of the substrate,
- forming a heat sink layer on a top surface of the soft magnetic underlayer,
- forming an interlayer on a top surface of the heat sink layer,
- forming a non-magnetic seed layer on a top surface of the interlayer,
- forming a magnetic recording structure on a top surface of the non-magnetic seed layer, wherein the magnetic recording structure contains a plurality of magnetic recording layers, and wherein the magnetic recording layers comprise a plurality of magnetic grains surrounded by a segregant comprising GaN or AlGaN.
3 more elements
Dependencies are inferred from the claim text.