公开(公告)号：US20130135975A1

公开(公告)日：2013-05-30

申请号：US13751980

申请日：2013-01-28

Applicant: Seagate Technology LLC

Inventor： Edward Charles Gage ,  Lifu Zhou ,  Michael Allen Seigler ,  William Albert Challener

IPC: G11B21/00 ,  H01L37/04

CPC classification number: G11B21/003 ,  G11B5/314 ,  G11B5/4866 ,  G11B2005/001 ,  G11B2005/0021 ,  H01L37/04

Abstract: An apparatus includes a slider including an air bearing surface and a waveguide configured to receive light from a light source, a sensor positioned to receive a portion of light emitted by the light source prior to the light exiting the slider at the air bearing surface, and a controller controlling the light source power in response to a characteristic of the sensor.

Abstract translation: 一种装置包括滑动件，其包括空气轴承表面和被配置为接收来自光源的光的波导，定位成在光从空气轴承表面处的滑动件射出之前接收由光源发射的光的一部分的传感器，以及 响应于传感器的特性来控制光源功率的控制器。

公开(公告)号：US11348610B1

公开(公告)日：2022-05-31

申请号：US17163983

申请日：2021-02-01

Applicant: Seagate Technology LLC

Inventor： Brett R. Herdendorf ,  Riyan Alex Mendonsa ,  Wolfgang Rosner ,  Steven L. Weber ,  Krishnan Subramanian ,  Edward Charles Gage

IPC: G11B5/55 ,  G11B5/60 ,  G11B5/48

Abstract: A data storage device includes at least one data storage disc, at least one head supported by a rotatable actuator arm, an elevator configured to move the rotatable actuator arm in a z direction, a first vertical guide post, a ramp assembly configured to support the head on a movable ramp, and a bracket attached to the movable ramp. The at least one head is configured to communicate with the at least one data storage disc when positioned over the at least one data storage disc. The movable ramp is moveable in a z direction parallel to the first vertical guide post. The bracket is engageable to the rotatable actuator arm so that the bracket moves along the first vertical guide post in unison with z direction motion of the rotatable actuator arm via the elevator, and the bracket is disengageable from the rotatable actuator arm.

公开(公告)号：US11043235B2

公开(公告)日：2021-06-22

申请号：US16805174

申请日：2020-02-28

Applicant: Seagate Technology LLC

Inventor： Riyan Alex Mendonsa ,  Edward Charles Gage ,  Kevin Gomez ,  Brett R. Herdendorf ,  Dan Mohr

IPC: G11B5/54 ,  G11B5/48 ,  G11B17/038 ,  G11B5/60

Abstract: An apparatus includes a plurality of storage media mounted on a rotatable spindle. The apparatus also includes an actuator with at least one actuator arm configured to translate among the plurality of storage media and at least two heads supported on the at least one actuator arm. Each of the at least two heads is configured to communicate with the plurality of storage media.

公开(公告)号：US10706876B1

公开(公告)日：2020-07-07

申请号：US16440306

申请日：2019-06-13

Applicant: Seagate Technology LLC

Inventor： Tim Rausch ,  Edward Charles Gage ,  Zengyuan Liu

IPC: G11B5/127 ,  G11B5/31 ,  G11B11/105 ,  G11B5/00

Abstract: A recording head for writing data on tracks of a data storage medium. The recording head includes a writer having a write pole and a trailing shield. The write pole includes a pole tip configured to write on the tracks of the data storage medium. The recording head also includes a writing-assistance wire that is positioned between the pole tip and the trailing shield in a down-track direction.

公开(公告)号：US09966100B1

公开(公告)日：2018-05-08

申请号：US15671262

申请日：2017-08-08

Applicant: Seagate Technology LLC

Inventor： Tim Rausch ,  Edward Charles Gage ,  Joshua Ward Christensen ,  Todd Michael Lammers

IPC: G11B5/02 ,  G11B7/00 ,  G11B7/1263 ,  G11B5/012 ,  H01S5/042 ,  H01S5/0683 ,  G11B5/00

CPC classification number: G11B5/012 ,  G11B2005/0021 ,  H01S5/0427 ,  H01S5/0683

Abstract: Before writing to a heat-assisted magnetic recording medium, a DC signal modulated with an AC signal is applied to a laser of a read/write head. A modulation level of an optical power sensor is measured, the optical power sensor being coupled to detect optical output of the laser in response to the modulated current. A target value of the DC signal that causes the modulation levels to reach a predetermined value between zero and a maximum value is determined and used to set a bias current for subsequent activation of the laser based.

公开(公告)号：US20170316804A1

公开(公告)日：2017-11-02

申请号：US15414288

申请日：2017-01-24

Applicant: Seagate Technology LLC

Inventor： Minjie Ma ,  Tim Rausch ,  Edward Charles Gage ,  Pu-Ling Lu

IPC: G11B20/18 ,  G11B5/09 ,  G11B7/1267 ,  G11B5/00

CPC classification number: G11B20/1816 ,  G11B5/09 ,  G11B5/455 ,  G11B7/1267 ,  G11B20/10305 ,  G11B2005/0021

Abstract: An apparatus and method provide for performing, using a heat-assisted magnetic recording head, multiple sequential writes to a recording medium, and recording a metric of write performance for each of the writes. The apparatus and method further provide for calculating fluctuations in the metric, detecting whether the head has a laser mode hopping problem using the metric fluctuations, and categorizing a severity of the laser mode hopping problem.

公开(公告)号：US20170206927A1

公开(公告)日：2017-07-20

申请号：US15475665

申请日：2017-03-31

Applicant: Seagate Technology LLC

Inventor： Wenzhong Zhu ,  Kaizhong Gao ,  Tim Rausch ,  Edward Charles Gage

IPC: G11B20/18 ,  G11B5/09 ,  G11B20/12 ,  G11B5/012

CPC classification number: G11B20/1889 ,  G11B5/012 ,  G11B5/09 ,  G11B5/59633 ,  G11B5/59638 ,  G11B5/6088 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10521 ,  G11B11/10595 ,  G11B20/12 ,  G11B20/1217 ,  G11B20/1833 ,  G11B27/3027 ,  G11B2005/0021 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1238 ,  G11B2020/1292

Abstract: A storage device includes a storage medium having a plurality of data tracks. At least one data track of the plurality of data tracks includes a number of super parity sectors. The number of super parity sectors selected for the at least one data tracks is selected based on a distance between an inner diameter of the storage medium and the data track. The number of super parity sectors provides error correction code for the at least one data track.

公开(公告)号：US09704519B1

公开(公告)日：2017-07-11

申请号：US15040701

申请日：2016-02-10

Applicant: Seagate Technology LLC

Inventor： Wenzhong Zhu ,  Edward Charles Gage ,  Alfredo Sam Chu

IPC: G11B11/00 ,  G11B5/455 ,  G11B5/00 ,  G11B5/31 ,  G11B5/48 ,  G11B11/105 ,  G11B5/60

CPC classification number: G11B5/455 ,  G11B5/314 ,  G11B5/40 ,  G11B5/48 ,  G11B5/6088 ,  G11B11/10543 ,  G11B2005/0016 ,  G11B2005/0021

Abstract: For each head in a collection of heat-assisted magnetic recording read/write heads, a reader width and a writer width is measured. A predicted life is determined for each head based on the respective reader width and writer width. In a first set of drives having relatively fewer heads per drive, a first subset of the heads having a higher value of the predicted life are used. In a second set of drives having relatively more heads per drive, a second subset of the heads having a lower value of the predicted life are used.

公开(公告)号：US09099139B2

公开(公告)日：2015-08-04

申请号：US13789158

申请日：2013-03-07

Applicant: Seagate Technology LLC

Inventor： Edward Charles Gage ,  Chubing Peng

IPC: G11B11/00 ,  G11B5/60 ,  G11B5/31 ,  G11B5/48 ,  G11B13/08 ,  G11B5/00

CPC classification number: G11B5/6088 ,  G02B6/1226 ,  G11B5/314 ,  G11B5/4866 ,  G11B13/08 ,  G11B2005/0021

Abstract: An apparatus includes a plasmonic transducer with first and second oppositely disposed outer edges. A waveguide is configured to receive light from a light source, the waveguide have first and second portions that deliver first and second portions of the light to the first and second edges of the plasmonic transducer. The first and second portions are different by at least one of a geometry and a construction to cause a relative phase shift between the first and second portions of the light.

Abstract translation: 一种装置包括具有第一和第二相对布置的外边缘的等离子体激元传感器。 波导被配置为从光源接收光，波导具有将光的第一和第二部分传递到等离子体激元传感器的第一和第二边缘的第一和第二部分。 第一和第二部分由导致光的第一和第二部分之间的相对相移的几何形状和结构中的至少一个而不同。

公开(公告)号：US08929181B2

公开(公告)日：2015-01-06

申请号：US14253014

申请日：2014-04-15

Applicant: Seagate Technology LLC

Inventor： Chubing Peng ,  Edward Charles Gage ,  Yongjun Zhoa

IPC: G11B11/00 ,  G11B13/08 ,  G11B5/31 ,  G11B5/60 ,  G11B5/00

CPC classification number: G11B13/08 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

Abstract: An apparatus includes a waveguide core having an elongated edge parallel to a substrate plane of the apparatus. An output end of the waveguide core faces a media-facing surface of the apparatus. A plate-like portion of a plasmonic material has a major surface facing the elongated edge of the waveguide core, and the major surface has a narrowed output end facing the media-facing surface. An elongated ridge of the plasmonic material is disposed on at least part of the plate-like portion between an input end and the narrowed output end.

Abstract translation: 一种装置包括具有平行于装置的基板平面的细长边缘的波导芯。 波导芯的输出端面向设备的面向媒体的表面。 等离子体激元材料的板状部分具有面向波导芯的细长边缘的主表面，并且主表面具有面向介质相对表面的变窄的输出端。 等离激元材料的细长脊线设置在输入端和变窄的输出端之间的板状部分的至少一部分上。