Back to results
US 9,001,630 B1Granted
Energy assisted magnetic recording medium capable of suppressing high DC readback noise
AssigneeWestern Digital Technologies, Inc.
InventorsGerardo A. Bertero, Michael Alex, Christopher B. Wolf, Eric J. Champion
Life of this patent
Estimating the term…
Abstract
A perpendicular magnetic recording (PMR) disk used in energy assisted magnetic recording drives is described. The PMR disk includes a substrate, a magnetic recording layer disposed above the substrate, an exchange coupling layer disposed above the magnetic recording layer, and a capping layer disposed above the exchange coupling layer. The capping layer has a Curie temperature greater than the Curie temperature of the magnetic recording layer.
Claims2
An energy assisted magnetic recording (EAMR) drive, comprising:
- a perpendicular magnetic recording (PMR) disk comprising:
- a magnetic recording layer disposed above a substrate;
- and
- a capping layer disposed above the magnetic recording layer, wherein the capping layer has a different Curie temperature than the magnetic recording layer;
- and
- means for reducing a DC read back noise of the EAMR drive using the capping layer, wherein the capping layer remains magnetized during a refreezing process of a write operation.
3 more elements
Dependencies are inferred from the claim text.