Heat sink layer
AssigneeSeagate Technology LLC
InventorsChubing Peng, Edward Charles Gage, Ganping Ju, Jan-Ulrich Thiele, Kaizhong Gao
Life of this patent
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Abstract
A layer configured for use in a magnetic stack has electrical resistivity greater than about 5×10−8 Ωm and thermal conductivity greater than about 1 W/mK. In some arrangements, the magnetic stack includes a substrate with the layer disposed over the substrate, a magnetic recording layer disposed over the layer, and a thermal resist layer disposed between the layer and the magnetic recording layer. In some arrangements, the layer is configured to function as a heat sink and a soft under layer. A system that incorporates the layer can include a magnetic write pole, a near field transducer (NFT) positioned proximate the write pole that radiates energy.
Claims22
A magnetic stack, comprising:
- a substrate;
- a heat sink layer disposed over the substrate;
- a magnetic recording layer disposed over the heat sink layer, wherein the heat sink layer has an electrical resistivity greater than about 5×10−8 Ωm;
- and
- a thermal resist layer disposed between the heat sink layer and the magnetic recording layer.
A magnetic stack, comprising:
- a substrate;
- a heat sink layer disposed over the substrate;
- a magnetic recording layer disposed over the heat sink layer, wherein the heat sink layer is configured to function as a heat sink and a soft under layer;
- and
- a thermal resist layer disposed between the heat sink layer and the magnetic recording layer.
A magnetic stack comprising:
- a layer, the layer having an electrical resistivity greater than about 5×10−8 Ωm and a thermal conductivity greater than about 1 W/mK;
- and
- a magnetic recording layer disposed over the layer.
A system, comprising:
- a magnetic write pole;
- a near field transducer (NFT) positioned proximate the write pole and comprising an energy radiating end that radiates energy;
- a magnetic stack located a head-media separation (HMS) distance from the near field transducer, the magnetic stack comprising:
- a substrate;
- a magnetic recording layer;
- and
- means for coupling the energy radiated by the near field transducer and the magnetic stack with a efficiency of about 1% to about 10% and conducting heat away from the magnetic recording layer.
Dependencies are inferred from the claim text.