公开(公告)号：US12159653B1

公开(公告)日：2024-12-03

申请号：US18232458

申请日：2023-08-10

Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.

Inventor： Sukumar Rajauria ,  Pierre-Olivier Jubert ,  Phillip S. Haralson ,  Jimmy Zhang ,  Farzad Novin

IPC: G11B11/105 ,  G11B5/03 ,  G11B5/54 ,  G11B5/00

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.

公开(公告)号：US12073856B1

公开(公告)日：2024-08-27

申请号：US18232009

申请日：2023-08-09

Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.

Inventor： Phillip S. Haralson ,  Farzad Novin ,  Pierre-Olivier Jubert

IPC: G11B27/36 ,  G11B5/012 ,  G11B5/03 ,  G11B11/105 ,  G11B5/00

CPC classification number: G11B5/03 ,  G11B5/012 ,  G11B2005/0021

Abstract: Various illustrative aspects are directed to a data storage device, comprising one or more disks; an actuator mechanism configured to position one or more heads proximate to a corresponding disk surface of the one or more disks; and one or more processing devices. The one or more processing devices are configured to generate a determination of magnetic responsiveness to thermal energy of at least one position of the corresponding disk surface in response to an operation of the selected head. The one or more processing devices are further configured to determine and apply a pre-bias current to the thermally energizing component prior to a write operation, with the selected head proximate to the at least one position of the corresponding disk surface, wherein the pre-bias current is based on the determination of magnetic responsiveness to thermal energy of the at least one position of the corresponding disk surface.