US 12,159,653 B1 · Data storage device with laser write bias optimization using disk thermal-magnetic response mapping in heat-assisted magnetic recording

Abstract

Various illustrative aspects are directed to a data storage device, comprising one or more disks; an actuator mechanism configured to position a selected head among one or more heads proximate to a corresponding disk surface among the one or more disks, wherein the selected head comprises a magnetic write element and a laser generating component; and one or more processing devices. The one or more processing devices are configured to measure a magnetic saturation responsiveness of the corresponding disk surface to heat-assisted write operations using a range of values of write laser current applied to the laser generating component. The one or more processing devices are further configured to calibrate a nominal write laser current of the selected head for the corresponding disk surface based on the measured magnetic saturation responsiveness of the corresponding disk surface.

Claims20

Dependent claims

A data storage device, comprising:

one or more disks;
an actuator mechanism configured to position a selected head among one or more heads proximate to a corresponding disk surface among the one or more disks, wherein the selected head comprises a magnetic write element and a laser generating component;
and
one or more processing devices, configured individually or in combination to:
measure a responsiveness to a magnetic saturation of the corresponding disk surface to heat-assisted write operations using a range of values of write laser current applied to the laser generating component;
and
calibrate a nominal write laser current of the selected head for the corresponding disk surface based on the measured responsiveness to the magnetic saturation of the corresponding disk surface.

4 more elements

A method comprising:

measuring, by one or more processing devices individually or in combination, a responsiveness to a magnetic saturation of a corresponding disk surface to heat-assisted write operations using a range of values of write laser current applied to a laser generating component;
and
calibrating, by the one or more processing devices individually or in combination, a nominal write laser current of a selected head for the corresponding disk surface based on the responsiveness of the measured magnetic saturation of the corresponding disk surface.

Dependencies are inferred from the claim text.

Data storage device with laser write bias optimization using disk thermal-magnetic response mapping in heat-assisted magnetic recording

Life of this patent

Data storage device with laser write bias optimization using disk thermal-magnetic response mapping in heat-assisted magnetic recording

Life of this patent

Abstract

Claims20