KR101553931B1 - 도입된 가열 발진을 사용하는 헤드-매체 접촉 검출 - Google Patents

도입된 가열 발진을 사용하는 헤드-매체 접촉 검출 Download PDF

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Publication number
KR101553931B1
KR101553931B1 KR1020140026637A KR20140026637A KR101553931B1 KR 101553931 B1 KR101553931 B1 KR 101553931B1 KR 1020140026637 A KR1020140026637 A KR 1020140026637A KR 20140026637 A KR20140026637 A KR 20140026637A KR 101553931 B1 KR101553931 B1 KR 101553931B1
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South Korea
Prior art keywords
head
sensor
detecting
signal
reference signal
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Expired - Fee Related
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KR1020140026637A
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English (en)
Korean (ko)
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KR20140111608A (ko
Inventor
동밍 리우
케네스 하팔라
스코트 이. 륜
린 초우
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시게이트 테크놀로지 엘엘씨
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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
    • G11B5/48—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
    • 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
    • G11B5/581—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 maintaining desired contact or spacing by direct interaction of forces generated between heads or supports thereof and record carriers or supports thereof, e.g. attraction-repulsion interactions
    • 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

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  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
KR1020140026637A 2013-03-11 2014-03-06 도입된 가열 발진을 사용하는 헤드-매체 접촉 검출 Expired - Fee Related KR101553931B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/793,803 2013-03-11
US13/793,803 US8638349B1 (en) 2013-03-11 2013-03-11 Head-medium contact detection using introduced heat oscillation

Publications (2)

Publication Number Publication Date
KR20140111608A KR20140111608A (ko) 2014-09-19
KR101553931B1 true KR101553931B1 (ko) 2015-09-17

Family

ID=49957952

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Application Number Title Priority Date Filing Date
KR1020140026637A Expired - Fee Related KR101553931B1 (ko) 2013-03-11 2014-03-06 도입된 가열 발진을 사용하는 헤드-매체 접촉 검출

Country Status (4)

Country Link
US (2) US8638349B1 (enExample)
JP (1) JP6121929B2 (enExample)
KR (1) KR101553931B1 (enExample)
CN (1) CN104050985B (enExample)

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US8638349B1 (en) 2013-03-11 2014-01-28 Seagate Technology Llc Head-medium contact detection using introduced heat oscillation
US8804263B1 (en) * 2013-08-30 2014-08-12 HGST Netherlands B.V. DC-offset adjustment for balanced embedded contact sensor
US8995076B1 (en) * 2014-04-21 2015-03-31 Seagate Technology Llc Head-medium contact detection using electromagnetic attraction
US9117474B1 (en) * 2014-10-02 2015-08-25 HGST Netherlands B.V. Implementing write head device for contact detection and spacing sensing
US9548072B2 (en) * 2015-02-11 2017-01-17 Seagate Technology Llc Concurrent modulation and frictional heating head disk contact detection
US9472225B2 (en) 2015-02-11 2016-10-18 Seagate Technology Llc Heat-assisted magnetic recording head-disk clearance setting
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
US9881642B2 (en) * 2015-03-31 2018-01-30 Seagate Technology Llc Disk surface defect detection
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
US9865292B1 (en) 2017-02-28 2018-01-09 Seagate Technology Llc Contact detection using modulated writer coil current for a heat-assisted magnetic recording slider
US9786309B1 (en) * 2017-06-06 2017-10-10 Western Digital Technologies, Inc. Data storage device detecting minimum stable fly height of a head over a disk
US9928873B1 (en) 2017-06-30 2018-03-27 Seagate Technology Llc Head-disk contact detection using a thermal sensor for modulation air bearings
US9990950B1 (en) 2017-07-17 2018-06-05 Seagate Technology Llc Calibration and adjusting target pre-write clearance offset for a heat-assisted magnetic recording device
US11305397B2 (en) 2018-06-18 2022-04-19 Seagate Technology Llc Lapping system that includes a lapping plate temperature control system, and related methods
US11389924B2 (en) 2018-06-18 2022-07-19 Seagate Technology Llc Methods of lapping while heating one or more features, and related sliders, row bars, and systems
JP2020027675A (ja) * 2018-08-13 2020-02-20 株式会社東芝 磁気ディスク装置用の熱アクチュエータ制御値の設定方法
US11331765B1 (en) 2019-04-12 2022-05-17 Seagate Technology Llc Methods of lapping a substrate while heating at least a portion of the substrate, and related substrates and systems
JP2022116888A (ja) 2021-01-29 2022-08-10 株式会社東芝 磁気ディスク装置、及び磁気ディスク装置の接触検出方法
US12176015B1 (en) * 2023-10-19 2024-12-24 Western Digital Technologies, Inc. Pole tip recession compensation by dual heater ratio optimization in a hard disk drive

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120120522A1 (en) * 2010-11-17 2012-05-17 Seagate Technology Llc Head Transducer with Multiple Resistance Temperature Sensors for Head-Medium Spacing and Contact Detection

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US20030058559A1 (en) * 2001-09-27 2003-03-27 Seagate Technology Llc Gap fly height sensing using thermal load response
JP2008097760A (ja) * 2006-10-13 2008-04-24 Fujitsu Ltd ヘッドスライダ用接触判定装置および接触判定方法並びに記憶媒体駆動装置
US7589928B2 (en) * 2007-03-16 2009-09-15 Seagate Technology Llc Magnetic recording device including a thermal proximity sensor
US7800858B1 (en) 2009-05-04 2010-09-21 Western Digital (Fremont), Llc Differential head integrated touchdown sensors for hard disk drives
US8098450B2 (en) 2009-12-31 2012-01-17 Hitachi Global Storage Technologies, Netherlands B.V. Fly-height management in a hard disk drive (HDD)
KR20110108180A (ko) * 2010-03-26 2011-10-05 삼성전자주식회사 헤드의 터치-다운 검출 방법 및 이를 이용한 헤드 부상 높이 조정 방법 및 디스크 드라이브
KR101592195B1 (ko) * 2010-03-26 2016-02-05 시게이트 테크놀로지 인터내셔날 센서를 이용한 터치-다운 및 헤드/미디어 접촉 검출 방법 및 장치와 이를 적용한 디스크 드라이브 및 저장매체
US20120050907A1 (en) 2010-08-26 2012-03-01 Seagate Technology Llc Detection of proximity between a sensor and an object
US8773801B2 (en) * 2010-10-21 2014-07-08 HGST Netherlands B.V. Magnetic-recording head with first thermal fly-height control element and embedded contact sensor element configurable as second thermal fly-height control element
US8523312B2 (en) * 2010-11-08 2013-09-03 Seagate Technology Llc Detection system using heating element temperature oscillations
US8792311B2 (en) * 2011-02-08 2014-07-29 Seagate Technology Llc Transducer head temperature monitoring
US8730611B2 (en) * 2011-02-28 2014-05-20 Seagate Technology Llc Contact detection
US8879189B2 (en) * 2012-01-25 2014-11-04 HGST Netherlands B.V. Magnetic head slider having shared heater and contact sensor terminal pads
US8736996B2 (en) * 2012-05-18 2014-05-27 HGST Netherlands B.V. Implementing channel signal processing assist with ECS contact detection
US8848309B2 (en) * 2012-07-09 2014-09-30 Seagate Technology Llc Determining head-to-disk contact and/or spacing using frequency domain signature of a temperature sensor
US8638349B1 (en) 2013-03-11 2014-01-28 Seagate Technology Llc Head-medium contact detection using introduced heat oscillation

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Publication number Priority date Publication date Assignee Title
US20120120522A1 (en) * 2010-11-17 2012-05-17 Seagate Technology Llc Head Transducer with Multiple Resistance Temperature Sensors for Head-Medium Spacing and Contact Detection

Also Published As

Publication number Publication date
CN104050985A (zh) 2014-09-17
US8638349B1 (en) 2014-01-28
US20140254040A1 (en) 2014-09-11
CN104050985B (zh) 2018-04-13
KR20140111608A (ko) 2014-09-19
JP2014175043A (ja) 2014-09-22
JP6121929B2 (ja) 2017-04-26
US9047898B2 (en) 2015-06-02

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