-
公开(公告)号：US20190287554A1
公开(公告)日：2019-09-19
申请号：US16170445
申请日：2018-10-25
发明人： Alfredo Sam Chu , Franklin P. Martens , Drew Michael Mader , Steven J. Kimble , James E. Angelo
摘要： A temperature compensation equation is generated during manufacture of a heat-assisted magnetic recording (HAMR) disk drive using initial total currents supplied to a laser diode of the disk drive at different initial operating temperatures. The total currents represent currents for recording data to or erasing data from the medium. The temperature compensation equation is stored in the disk drive, and updated, during field operation, using a subsequent total current associated with an operating temperature differing from the initial operating temperatures. The total current supplied to the laser diode for a subsequent write operation is adjusted using the updated temperature compensation equation in response to the operating temperature at the time of the subsequent write operation.
-
公开(公告)号：US10127930B1
公开(公告)日：2018-11-13
申请号：US15919386
申请日：2018-03-13
发明人： Alfredo Sam Chu , Franklin P. Martens , Drew Michael Mader , Steven J. Kimble , James E. Angelo
摘要： A temperature compensation equation is generated during manufacture of a heat-assisted magnetic recording (HAMR) disk drive using initial total currents supplied to a laser diode of the disk drive at different initial operating temperatures. The total currents represent currents for recording data to or erasing data from the medium. The temperature compensation equation is stored in the disk drive, and updated, during field operation, using a subsequent total current associated with an operating temperature differing from the initial operating temperatures. The total current supplied to the laser diode for a subsequent write operation is adjusted using the updated temperature compensation equation in response to the operating temperature at the time of the subsequent write operation.
-
公开(公告)号：US10395673B1
公开(公告)日：2019-08-27
申请号：US16170445
申请日：2018-10-25
发明人： Alfredo Sam Chu , Franklin P. Martens , Drew Michael Mader , Steven J. Kimble , James E. Angelo
摘要： A temperature compensation equation is generated during manufacture of a heat-assisted magnetic recording (HAMR) disk drive using initial total currents supplied to a laser diode of the disk drive at different initial operating temperatures. The total currents represent currents for recording data to or erasing data from the medium. The temperature compensation equation is stored in the disk drive, and updated, during field operation, using a subsequent total current associated with an operating temperature differing from the initial operating temperatures. The total current supplied to the laser diode for a subsequent write operation is adjusted using the updated temperature compensation equation in response to the operating temperature at the time of the subsequent write operation.
-
公开(公告)号：US09990950B1
公开(公告)日：2018-06-05
申请号：US15651299
申请日：2017-07-17
IPC分类号： G11B11/00 , G11B5/60 , G11B20/10 , G11B5/00 , G11B7/126 , G11B7/1263 , G11B7/1267
CPC分类号： G11B5/6029 , G11B5/5534 , G11B5/607 , G11B5/6076 , G11B5/6088 , G11B7/126 , G11B7/1263 , G11B7/1267 , G11B20/10388 , G11B2005/0021
摘要： An apparatus comprises a slider configured for heat-assisted magnetic coupled to a controller. The slider comprises a writer, a heater, a near-field transducer, and an optical waveguide for communicating light from a laser diode to the near-field transducer. The controller is configured to set a target pre-write clearance of the slider prior to performing a write operation, set a target write clearance of the slider for performing the write operation, and determine a difference between the target pre-write and write clearances to define a target pre-write clearance offset. The controller is also configured to measure, for a plurality of different target pre-write clearance offsets, a writability metric for the slider while sweeping a laser diode current, and adjust the target pre-write clearance offset so that the writability metric reaches a predetermined threshold. The controller is further configured to perform subsequent write operations using the adjusted target pre-write clearance offset.
-
-
-
搜索结果
4 条记录 (耗时 0.02 秒)
