SG109594A1 - Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a function - Google Patents

Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a function

Info

Publication number
SG109594A1
SG109594A1 SG200404789A SG200404789A SG109594A1 SG 109594 A1 SG109594 A1 SG 109594A1 SG 200404789 A SG200404789 A SG 200404789A SG 200404789 A SG200404789 A SG 200404789A SG 109594 A1 SG109594 A1 SG 109594A1
Authority
SG
Singapore
Prior art keywords
function
disk drive
magnetic disk
inspection device
flying height
Prior art date
Application number
SG200404789A
Other languages
English (en)
Inventor
Morinaga Akira
Maruyama Yoji
Ide Hiroshi
Miyamoto Norifumi
Original Assignee
Hitachi Global Storage Tech
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 Hitachi Global Storage Tech filed Critical Hitachi Global Storage Tech
Publication of SG109594A1 publication Critical patent/SG109594A1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/20—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
    • G11B21/21—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider
    • 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
    • G11B5/3136—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure for reducing the pole-tip-protrusion at the head transducing surface, e.g. caused by thermal expansion of dissimilar materials
    • 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6011—Control of flying height
    • G11B5/607—Control of flying height using thermal means

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Digital Magnetic Recording (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
SG200404789A 2003-08-28 2004-08-25 Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a function SG109594A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003303828A JP4223897B2 (ja) 2003-08-28 2003-08-28 サーマルプロトリューション量を浮上量管理に用いる機能を持つ磁気ディスク装置、その機能を有す検査装置。

Publications (1)

Publication Number Publication Date
SG109594A1 true SG109594A1 (en) 2005-03-30

Family

ID=34191239

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200404789A SG109594A1 (en) 2003-08-28 2004-08-25 Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a function

Country Status (7)

Country Link
US (1) US7330324B2 (zh)
EP (1) EP1517307A1 (zh)
JP (1) JP4223897B2 (zh)
KR (1) KR20050021898A (zh)
CN (1) CN1308957C (zh)
SG (1) SG109594A1 (zh)
TW (1) TW200511236A (zh)

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JP4979894B2 (ja) * 2005-03-25 2012-07-18 ヒタチグローバルストレージテクノロジーズネザーランドビーブイ 磁気ディスク装置
JP4895560B2 (ja) * 2005-09-22 2012-03-14 ヒタチグローバルストレージテクノロジーズネザーランドビーブイ データ記憶装置
US7342736B1 (en) * 2005-10-07 2008-03-11 Maxtor Corporation Methods and disk drive that measure head flying height at power-on/off
US7215495B1 (en) 2005-12-27 2007-05-08 Hitachi Global Storage Technologies Netherlands B.V. System and method for determining head-disk contact in a magnetic recording disk drive
US7180692B1 (en) 2005-12-27 2007-02-20 Hitachi Global Storage Technologies Netherlands B.V. System and method for calibrating and controlling a fly-height actuator in a magnetic recording disk drive
US7280305B2 (en) * 2006-01-13 2007-10-09 Samsung Electronics Co., Ltd. Method and apparatus for estimating and controlling the flying height of a read-write head in a hard disk drive
US7573668B2 (en) * 2006-01-16 2009-08-11 Samsung Electronics Co., Ltd. Method and apparatus for sensing leakage current to estimate and possibly adjust flying height of a read-write head in a hard disk drive
US7292401B2 (en) 2006-03-14 2007-11-06 Hitachi Global Storage Technologies Netherlands B.V. System and method for determining head-disk contact in a magnetic recording disk drive by magnetoresistive signal amplitude
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JP4439483B2 (ja) * 2006-03-28 2010-03-24 東芝ストレージデバイス株式会社 記憶装置、制御装置、制御方法及びプログラム
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JP2008243249A (ja) 2007-03-26 2008-10-09 Fujitsu Ltd 記憶装置ならびに記憶装置の制御装置
JP2008243288A (ja) * 2007-03-27 2008-10-09 Fujitsu Ltd 磁気記憶装置、制御装置及び浮上量制御方法
KR100897561B1 (ko) 2007-04-27 2009-05-15 삼성전자주식회사 하드디스크 드라이브, 하드디스크 드라이브의 자기 헤드의부상높이 제어 방법 및 그 방법을 수행하는 컴퓨터프로그램을 기록한 기록매체
US8665562B2 (en) * 2007-11-13 2014-03-04 Emc Corporation Method of reliable usage of dynamic fly-height control at environmental extremes
JP2009199660A (ja) * 2008-02-21 2009-09-03 Fujitsu Ltd 磁気記録媒体の媒体欠陥検出方法及び磁気記憶装置
JP4836282B2 (ja) 2008-06-12 2011-12-14 東芝ストレージデバイス株式会社 ヘッド浮上量調整方法及び書き込み電流値決定方法、並びに記憶装置
JP2010033671A (ja) * 2008-07-30 2010-02-12 Toshiba Storage Device Corp 磁気ディスク装置および磁気ヘッドの突き出し量制御方法
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US7719786B1 (en) * 2008-12-23 2010-05-18 Hitachi Global Storage Technologies Netherlands B.V. Active fly height control using radio frequency feedback
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Also Published As

Publication number Publication date
JP4223897B2 (ja) 2009-02-12
JP2005071546A (ja) 2005-03-17
KR20050021898A (ko) 2005-03-07
CN1308957C (zh) 2007-04-04
US7330324B2 (en) 2008-02-12
US20050046985A1 (en) 2005-03-03
TW200511236A (en) 2005-03-16
CN1591662A (zh) 2005-03-09
EP1517307A1 (en) 2005-03-23

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