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US 9,792,946 B2Granted
Patterned media for heat assisted recording
AssigneeSeagate Technology LLC
InventorsIbrahim Kursat Sendur, William Albert Challener, Chubing Peng
Life of this patent
Estimating the term…
Abstract
A patterned magnetic recording medium for use in heat assisted magnetic recording comprises an electrically conductive heat sink layer and a plurality of discrete magnetic recording elements positioned adjacent to a first surface of the heat sink layer. Disc drives that include the patterned medium and a method of magnetic recording using the patterned media are also included.
Claims16
A method of recording comprising:
- positioning a recording head adjacent to a patterned recording medium including an electrically conductive heat sink layer and a plurality of discrete recording elements positioned adjacent to a first surface of the heat sink layer,
- wherein the discrete recording elements are thermally and electrically isolated from each other;
- producing electromagnetic radiation having electric field lines substantially perpendicular and tangential to one or more of the discrete recording elements to raise the temperature of the one or more discrete recording elements, wherein the discrete recording elements allow for the heat sink layer to be less aggressive than a corresponding heat sink layer in a recording medium having a continuous recording layer, resulting in comparatively higher temperature increases for the one or more discrete recording elements;
- and
- changing the magnetization of the one or more discrete recording elements.
2 more elements
A method of recording comprising:
- using electromagnetic radiation configured to include an electric field lines substantially perpendicular and tangential to one or more discrete recording elements of a recording layer to raise the temperature of the one or more discrete recording elements to change magnetization of the one or more discrete recording elements, wherein
- the electric field lines are substantially perpendicular to one or more top surfaces of the one or more discrete recording elements, respectively, and substantially tangential to one or more side surfaces of the one or more discrete recording elements,
- the electric field lines couple more strongly to the one or more discrete recording elements through interactions with the side surfaces than interactions with the top surfaces, and
- the discrete recording elements are thermally and electrically isolated from each other.
1 more element
A method, comprising:
- positioning a recording head over a patterned recording layer overlying a heat sink layer wherein the heat sink layer is a better electrical conductor than the recording layer;
- irradiating one or more isolated recording elements of the recording layer with electromagnetic radiation to heat the one or more recording elements,
- wherein electric field lines of the electromagnetic radiation are substantially perpendicular and tangential to the one or more recording elements;
- and
- changing the magnetization of the one or more recording elements.
2 more elements
Dependencies are inferred from the claim text.