KR20130081632A - 열 지원 자기 기록 시스템 - Google Patents

열 지원 자기 기록 시스템 Download PDF

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Publication number
KR20130081632A
KR20130081632A KR1020120109883A KR20120109883A KR20130081632A KR 20130081632 A KR20130081632 A KR 20130081632A KR 1020120109883 A KR1020120109883 A KR 1020120109883A KR 20120109883 A KR20120109883 A KR 20120109883A KR 20130081632 A KR20130081632 A KR 20130081632A
Authority
KR
South Korea
Prior art keywords
laser
magnetic
signal
pulse
operative
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.)
Withdrawn
Application number
KR1020120109883A
Other languages
English (en)
Korean (ko)
Inventor
로스 에스 윌슨
제이슨 에스 골드버그
Original Assignee
엘에스아이 코포레이션
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 엘에스아이 코포레이션 filed Critical 엘에스아이 코포레이션
Publication of KR20130081632A publication Critical patent/KR20130081632A/ko
Withdrawn legal-status Critical Current

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Classifications

    • 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)
KR1020120109883A 2012-01-09 2012-10-04 열 지원 자기 기록 시스템 Withdrawn KR20130081632A (ko)

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 (1)

Publication Number Publication Date
KR20130081632A true KR20130081632A (ko) 2013-07-17

Family

ID=47044841

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120109883A Withdrawn KR20130081632A (ko) 2012-01-09 2012-10-04 열 지원 자기 기록 시스템

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)

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* Cited by examiner, † Cited by third party
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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
WO2015066216A1 (en) * 2013-10-29 2015-05-07 Optical Archive Inc. Array reader and array reading of optical media
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
JP2015149110A (ja) 2014-02-06 2015-08-20 株式会社東芝 磁気ディスク装置、及び制御方法
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
US10896694B2 (en) * 2018-10-30 2021-01-19 Marvell Asia Pte, Ltd. Thermal compensation for laser in heat assisted magnetic recording
CN114930268B (zh) * 2020-01-10 2024-05-17 罗姆股份有限公司 半导体器件和半导体器件系统
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
US7242651B2 (en) * 2000-12-11 2007-07-10 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

Also Published As

Publication number Publication date
TW201344681A (zh) 2013-11-01
TWI536372B (zh) 2016-06-01
CN103198839A (zh) 2013-07-10
EP2613317A1 (en) 2013-07-10
CN103198839B (zh) 2017-09-12
US8315128B1 (en) 2012-11-20
EP2613317B1 (en) 2020-09-23
JP2013143177A (ja) 2013-07-22

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Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 20121004

PG1501 Laying open of application
N231 Notification of change of applicant
PN2301 Change of applicant

Patent event date: 20150427

Comment text: Notification of Change of Applicant

Patent event code: PN23011R01D

PC1203 Withdrawal of no request for examination
WITN Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid