KR101947347B1 - 접촉 감지 - Google Patents

접촉 감지 Download PDF

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Publication number
KR101947347B1
KR101947347B1 KR1020137025133A KR20137025133A KR101947347B1 KR 101947347 B1 KR101947347 B1 KR 101947347B1 KR 1020137025133 A KR1020137025133 A KR 1020137025133A KR 20137025133 A KR20137025133 A KR 20137025133A KR 101947347 B1 KR101947347 B1 KR 101947347B1
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KR
South Korea
Prior art keywords
signal
contact
actuator
transducing head
input signal
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.)
Expired - Fee Related
Application number
KR1020137025133A
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English (en)
Korean (ko)
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KR20140010409A (ko
Inventor
동밍 리우
린 저우
아담 케이. 히메스
리 씨. 크닙펜버그
마이클 티. 존슨
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시게이트 테크놀로지 엘엘씨
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Application filed by 시게이트 테크놀로지 엘엘씨 filed Critical 시게이트 테크놀로지 엘엘씨
Publication of KR20140010409A publication Critical patent/KR20140010409A/ko
Application granted granted Critical
Publication of KR101947347B1 publication Critical patent/KR101947347B1/ko
Expired - Fee Related 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
    • G11B5/48—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
    • 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
    • G11B5/6029—Measurement using values derived from the data signal read from the disk
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or 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
    • G11B5/48—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
    • G11B5/48—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
    • 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
    • G11B5/6076—Detecting head-disk contact
    • 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
    • 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

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Digital Magnetic Recording (AREA)
KR1020137025133A 2011-02-28 2012-01-30 접촉 감지 Expired - Fee Related KR101947347B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US13/036,184 2011-02-28
US13/036,184 US8730611B2 (en) 2011-02-28 2011-02-28 Contact detection
PCT/US2012/023118 WO2012118583A1 (en) 2011-02-28 2012-01-30 Contact detection

Publications (2)

Publication Number Publication Date
KR20140010409A KR20140010409A (ko) 2014-01-24
KR101947347B1 true KR101947347B1 (ko) 2019-02-12

Family

ID=45852691

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020137025133A Expired - Fee Related KR101947347B1 (ko) 2011-02-28 2012-01-30 접촉 감지

Country Status (6)

Country Link
US (2) US8730611B2 (enExample)
EP (1) EP2681736A1 (enExample)
JP (1) JP6139414B2 (enExample)
KR (1) KR101947347B1 (enExample)
CN (1) CN103493132B (enExample)
WO (1) WO2012118583A1 (enExample)

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US8885279B1 (en) * 2010-08-30 2014-11-11 Western Digital Technologies, Inc. Disk drive detecting head/disk contact by evaluating a subset of touchdown metrics during a servo sector interrupt
US8730611B2 (en) 2011-02-28 2014-05-20 Seagate Technology Llc Contact detection
US8681445B1 (en) 2012-06-28 2014-03-25 Western Digital Technologies, Inc. Disk drive detecting head touchdown by computing anti-correlation in sensor signal
US8970978B1 (en) * 2012-10-22 2015-03-03 Western Digital Technologies, Inc. Disk drive detecting head touchdown by applying DC+AC control signal to fly height actuator
US8638349B1 (en) * 2013-03-11 2014-01-28 Seagate Technology Llc Head-medium contact detection using introduced heat oscillation
US8953275B2 (en) 2013-06-17 2015-02-10 Seagate Technology Llc In situ sensor based contact detection
US8908317B1 (en) * 2014-01-27 2014-12-09 Kabushiki Kaisha Toshiba Method for detecting touchdown of head and disk storage apparatus
US9053729B1 (en) 2014-07-23 2015-06-09 Seagate Technology Llc Nonlinearity-based contact prediction
US9595280B2 (en) * 2015-02-26 2017-03-14 Western Digital Technologies, Inc Hard disk drive head-disk interface dithering
US9443543B1 (en) * 2015-03-11 2016-09-13 Kabushiki Kaisha Toshiba Disk storage device and method for controlling head flying height
JP6349279B2 (ja) * 2015-03-25 2018-06-27 日本発條株式会社 電子部品の接合強度試験装置及び接合強度試験方法
US9466328B1 (en) * 2015-05-22 2016-10-11 Kabushiki Kaisha Toshiba Contact-detecting method, manufacturing method of disk drive, and disk drive
US9437234B1 (en) 2015-08-20 2016-09-06 Seagate Technology Llc Head-medium contact detection using high frequency heater oscillation
US9761270B1 (en) 2016-12-21 2017-09-12 Seagate Technology Llc Data storage device using high and low frequencies AC heat produce position-error-signals for head contact detection
JP6390774B1 (ja) 2017-09-13 2018-09-19 株式会社明電舎 動力計制御装置
US10217481B1 (en) 2018-03-19 2019-02-26 Western Digital Technologies, Inc. Data storage device employing low duty cycle square wave to detect head touchdown
KR102256390B1 (ko) 2018-09-07 2021-05-26 메이덴샤 코포레이션 동력계 제어 장치
JP6737363B1 (ja) 2019-02-28 2020-08-05 株式会社明電舎 動力計制御装置

Citations (1)

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US20100225310A1 (en) * 2009-03-05 2010-09-09 Toshiba Storage Device Corporation Touch-down determining device, touch-down determining method, and magnetic disk device

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US6008640A (en) 1997-04-28 1999-12-28 Seagate Technology, Inc. Detection and measurement of head disc interference using read back signal (without acoustic emission sensor or laser doppler vibrometer)
US6097559A (en) * 1998-06-26 2000-08-01 International Business Machines Corporation System and method for detecting head-to-disk contact in-situ a direct access storage device using a position error signal
US6822821B2 (en) 2001-01-19 2004-11-23 Seagate Technology Llc Method and apparatus for predicting a head crash in a disc drive
US6967805B1 (en) 2002-04-09 2005-11-22 Seagate Technology Llc In-situ monitoring of proximity and contact between a slider and a disc in a disc drive
US7038875B2 (en) 2003-07-31 2006-05-02 Seagate Technology Llc Dynamic measurement of head media spacing modulation
US7016139B2 (en) * 2003-10-22 2006-03-21 Hitachi Global Storage Netherlands B.V. Magnetic recording disk drive with actively controlled electric potential at the head/disk interface for wear and durability control
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US7564649B2 (en) 2005-04-27 2009-07-21 Seagate Technology Llc Head assembly having a sensing element to provide feedback for head-media instability
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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
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JP4362491B2 (ja) * 2006-03-31 2009-11-11 富士通株式会社 磁気ヘッドの磁気スペーシング制御方法、リード／ライト回路及びそれを用いた磁気ディスク装置
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Also Published As

Publication number Publication date
CN103493132A (zh) 2014-01-01
US20120218659A1 (en) 2012-08-30
EP2681736A1 (en) 2014-01-08
US20140254344A1 (en) 2014-09-11
US9135938B2 (en) 2015-09-15
CN103493132B (zh) 2017-05-24
US8730611B2 (en) 2014-05-20
JP6139414B2 (ja) 2017-05-31
JP2014507044A (ja) 2014-03-20
WO2012118583A1 (en) 2012-09-07
KR20140010409A (ko) 2014-01-24

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