JP2013143177A - 熱アシスト磁気記録システム - Google Patents

熱アシスト磁気記録システム Download PDF

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Publication number
JP2013143177A
JP2013143177A JP2012222335A JP2012222335A JP2013143177A JP 2013143177 A JP2013143177 A JP 2013143177A JP 2012222335 A JP2012222335 A JP 2012222335A JP 2012222335 A JP2012222335 A JP 2012222335A JP 2013143177 A JP2013143177 A JP 2013143177A
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JP
Japan
Prior art keywords
laser
magnetic
signal
pulse
operable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
JP2012222335A
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English (en)
Japanese (ja)
Other versions
JP2013143177A5 (enExample
Inventor
S Wilson Ross
エス． ウィルソン，ロス
S Goldberg Jason
エス． ゴールドバーグ，ジェイソン
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LSI Corp
Original Assignee
LSI Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LSI Corp filed Critical LSI Corp
Publication of JP2013143177A publication Critical patent/JP2013143177A/ja
Publication of JP2013143177A5 publication Critical patent/JP2013143177A5/ja
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10222—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09—Digital recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508—Magnetic discs
    • G11B2220/2516—Hard disks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Magnetic Heads (AREA)
JP2012222335A 2012-01-09 2012-10-04 熱アシスト磁気記録システム Withdrawn JP2013143177A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/346,102 2012-01-09
US13/346,102 US8315128B1 (en) 2012-01-09 2012-01-09 Heat assisted magnetic recording system

Publications (2)

Publication Number Publication Date
JP2013143177A true JP2013143177A (ja) 2013-07-22
JP2013143177A5 JP2013143177A5 (enExample) 2015-11-05

Family

ID=47044841

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012222335A Withdrawn JP2013143177A (ja) 2012-01-09 2012-10-04 熱アシスト磁気記録システム

Country Status (6)

Country Link
US (1) US8315128B1 (enExample)
EP (1) EP2613317B1 (enExample)
JP (1) JP2013143177A (enExample)
KR (1) KR20130081632A (enExample)
CN (1) CN103198839B (enExample)
TW (1) TWI536372B (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9093085B1 (en) 2014-02-06 2015-07-28 Kabushiki Kaisha Toshiba Laser controller for heat-assisted magnetic recording device
JP2017500681A (ja) * 2013-10-29 2017-01-05 ソニー コーポレイション オブ アメリカ 光学媒体のアレイリーダ及びアレイ読み取り

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8565047B2 (en) * 2011-04-28 2013-10-22 Lsi Corporation Systems and methods for data write loopback based timing control
US9318142B2 (en) 2012-04-25 2016-04-19 Seagate Technology Llc Laser modulation for magnetic recording apparatus
US8891341B1 (en) 2013-03-11 2014-11-18 Western Digital Technologies, Inc. Energy assisted magnetic recording disk drive using modulated laser light
US9202499B2 (en) 2013-03-13 2015-12-01 Seagate Technology Llc Contact detection using laser modulation
US8754678B1 (en) * 2013-03-15 2014-06-17 Analog Devices, Inc. Apparatus and methods for invertible sine-shaping for phase interpolation
US9123355B1 (en) 2013-09-16 2015-09-01 Seagate Technology Llc HAMR channel to preamp interface
US8929013B1 (en) * 2013-11-08 2015-01-06 Lsi Corporation Storage system with pattern dependent write
US9025420B1 (en) * 2013-11-15 2015-05-05 HGST Netherlands B.V. Self-controlled laser pulsing for thermally assisted recording
US9064525B2 (en) 2013-11-26 2015-06-23 Western Digital Technologies, Inc. Disk drive comprising laser transmission line optimized for heat assisted magnetic recording
US9761268B1 (en) * 2013-12-02 2017-09-12 Seagate Technology Llc Precompensation based on nearby data
US9070377B1 (en) 2013-12-12 2015-06-30 Seagate Technology Llc Cooling periods used during the writing of bit boundaries to a magnetic recording media
US9311943B2 (en) 2014-02-17 2016-04-12 HGST Netherlands B.V. Compensation of laser diode introduced flying height changes
US9318153B2 (en) * 2014-03-31 2016-04-19 Seagate Technology Llc HAMR drive fault detection system
US9070397B1 (en) 2014-05-08 2015-06-30 HGST Netherlands B.V. Write current and media heater control for heat or microwave assisted magnetic recording
US9530447B2 (en) * 2015-02-27 2016-12-27 Seagate Technology Llc Adaptive HAMR power data storage device
US9754610B2 (en) 2015-12-21 2017-09-05 Avago Technologies General Ip (Singapore) Pte. Ltd. Magnetic recording system with ternary pattern dependent write signaling
US9715887B2 (en) 2015-12-28 2017-07-25 Avago Technologies General Ip (Singapore) Pte. Ltd. Magnetic recording system using pattern dependent writer having register pages for storing write currents
US9721588B2 (en) 2015-12-28 2017-08-01 Avago Technologies General Ip (Singapore) Pte. Ltd. Magnetic recording system including differentiated write current emphasis signal generator circuit
US9779763B1 (en) 2016-04-29 2017-10-03 Seagate Technology Llc Write signal adjustment
US9620163B1 (en) 2016-05-16 2017-04-11 Seagate Technology Llc Measuring transition shifts due to laser power variation in a heat-assisted magnetic recording device
US10734016B2 (en) * 2018-08-21 2020-08-04 Marvell Asia Pte, Ltd. Pulse-based writing for magnetic storage media
EP3874496A1 (en) * 2018-10-30 2021-09-08 Marvell Asia Pte., Ltd. Thermal compensation for laser in heat assisted magnetic recording
WO2021140998A1 (ja) * 2020-01-10 2021-07-15 ローム株式会社 半導体装置、および半導体装置システム
US11037597B1 (en) 2020-06-29 2021-06-15 Seagate Technology Llc Heat-assisted magnetic recording apparatus that modulates laser power to reduce differences between track widths of recorded marks
CN117613654B (zh) * 2023-11-23 2025-01-10 山东大学 一种基于fpga的可编程高稳定激光脉冲控制系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002221098A1 (en) * 2000-12-11 2002-06-24 Sanyo Electric Co., Ltd. Disk reproduction device
JP4102289B2 (ja) * 2003-11-07 2008-06-18 株式会社日立製作所 情報記録方法、情報記録装置及び評価装置
CN100356694C (zh) * 2004-01-06 2007-12-19 瑞昱半导体股份有限公司 相位差检测器及其方法
US7515372B2 (en) * 2006-04-03 2009-04-07 Seagate Technology Llc Compensating the effects of static head-media spacing variations and nonlinear transition shift in heat assisted magnetic recording
US7852587B2 (en) * 2008-09-11 2010-12-14 Hitachi Global Storage Technologies Netherlands B.V. Thermal assisted recording (TAR) disk drive capable of controlling the write pulses
JP5716268B2 (ja) * 2009-09-29 2015-05-13 ソニー株式会社 ハードディスク装置およびその駆動方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017500681A (ja) * 2013-10-29 2017-01-05 ソニー コーポレイション オブ アメリカ 光学媒体のアレイリーダ及びアレイ読み取り
US9093085B1 (en) 2014-02-06 2015-07-28 Kabushiki Kaisha Toshiba Laser controller for heat-assisted magnetic recording device

Also Published As

Publication number Publication date
US8315128B1 (en) 2012-11-20
TWI536372B (zh) 2016-06-01
KR20130081632A (ko) 2013-07-17
EP2613317A1 (en) 2013-07-10
CN103198839B (zh) 2017-09-12
CN103198839A (zh) 2013-07-10
TW201344681A (zh) 2013-11-01
EP2613317B1 (en) 2020-09-23

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