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US 8,711,519 B2Granted
Shallow trench media
AssigneeSeagate Technology LLC
InventorsZhaohui Fan, David Kuo
Life of this patent
Estimating the term…
Abstract
A shallow trench discrete track media structure is fabricated by etching a magnetic recording layer to provide a plurality of discrete magnetic data tracks separated by shallow trenches. Each shallow trench has a trench floor formed at a depth in the magnetic recording layer that is less than the thickness of the magnetic recording layer. Exposed regions of the magnetic recording layer beneath the trench floor are reacted with reactive plasma to diminish the magnetic moment of the exposed regions.
Claims10
An apparatus comprising:
- a magnetic recording layer having a plurality of trenches, the magnetic recording layer having a first magnetic moment and a thickness, each trench having a trench floor at a first depth in the magnetic recording layer that is less than the thickness of the magnetic recording layer;
- and
- a region in the magnetic recording layer beneath each trench floor having a second magnetic moment that is less than the first magnetic moment,
- wherein the magnetic recording layer includes an upper continuous magnetic layer on a lower granular magnetic layer.
1 more element
An apparatus comprising:
- a magnetic recording layer having a first magnetic moment and a thickness;
- means for separating portions of the magnetic recording layer, the means having a floor at a first depth in the magnetic recording layer that is less than the thickness of the recording layer;
- and
- a region in the magnetic recording layer beneath the floor having a second magnetic moment that is less than the first magnetic moment,
- wherein the magnetic recording layer includes an upper continuous magnetic layer on a lower granular magnetic layer.
2 more elements
Dependencies are inferred from the claim text.