DE3888160T2 - Kapazitive Messung und Kontrolle der Flughöhe eines Aufzeichnungsgleitschuhes. - Google Patents

Kapazitive Messung und Kontrolle der Flughöhe eines Aufzeichnungsgleitschuhes.

Info

Publication number
DE3888160T2
DE3888160T2 DE3888160T DE3888160T DE3888160T2 DE 3888160 T2 DE3888160 T2 DE 3888160T2 DE 3888160 T DE3888160 T DE 3888160T DE 3888160 T DE3888160 T DE 3888160T DE 3888160 T2 DE3888160 T2 DE 3888160T2
Authority
DE
Germany
Prior art keywords
control
flight altitude
capacitive measurement
shoe
recording
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
DE3888160T
Other languages
English (en)
Other versions
DE3888160D1 (de
Inventor
Suryanarayan Ganesh Hedge
Robert Alan Scranton
Edward John Yarmchuk
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE3888160D1 publication Critical patent/DE3888160D1/de
Publication of DE3888160T2 publication Critical patent/DE3888160T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
    • 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
    • G11B5/10—Structure or manufacture of housings or shields for heads
    • 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
    • G11B5/10—Structure or manufacture of housings or shields for heads
    • G11B5/105—Mounting of head within housing or assembling of head and housing
    • 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
    • G11B5/488—Disposition of heads
    • 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
DE3888160T 1988-02-01 1988-12-08 Kapazitive Messung und Kontrolle der Flughöhe eines Aufzeichnungsgleitschuhes. Expired - Fee Related DE3888160T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/151,134 US4931887A (en) 1988-02-01 1988-02-01 Capacitive measurement and control of the fly height of a recording slider

Publications (2)

Publication Number Publication Date
DE3888160D1 DE3888160D1 (de) 1994-04-07
DE3888160T2 true DE3888160T2 (de) 1994-09-15

Family

ID=22537462

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3888160T Expired - Fee Related DE3888160T2 (de) 1988-02-01 1988-12-08 Kapazitive Messung und Kontrolle der Flughöhe eines Aufzeichnungsgleitschuhes.

Country Status (4)

Country Link
US (1) US4931887A (de)
EP (1) EP0326683B1 (de)
JP (1) JPH01210802A (de)
DE (1) DE3888160T2 (de)

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JP2533664B2 (ja) * 1990-01-17 1996-09-11 株式会社日立製作所 磁気記録装置
JP2784829B2 (ja) * 1990-02-06 1998-08-06 ソニー株式会社 記録信号磁界発生装置
JPH03248351A (ja) * 1990-02-23 1991-11-06 Sharp Corp 光磁気記録媒体及びそれを用いる磁気記録再生装置
JP2936656B2 (ja) * 1990-06-25 1999-08-23 ソニー株式会社 正圧スライダのローディング装置
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US5189377A (en) * 1990-09-04 1993-02-23 Extrude Hone Corporation Method and apparatus for co-ordinate measuring using a capacitance probe
JPH04248113A (ja) * 1991-01-09 1992-09-03 Sony Corp 記録再生装置及びその記録媒体
JPH06147811A (ja) * 1992-11-04 1994-05-27 Fujitsu Ltd 回転角度検出方式
JP2895694B2 (ja) * 1992-12-08 1999-05-24 シャープ株式会社 情報記録・再生用スライダー、情報記録・再生用スライダーの製造方法および情報記録・再生装置
US5377131A (en) * 1992-12-31 1994-12-27 International Business Machines Corporation Digital amplitude estimator
US5377058A (en) * 1992-12-31 1994-12-27 International Business Machines Corporation Fly height servo control of read/write head suspension
US5382911A (en) * 1993-03-29 1995-01-17 International Business Machines Corporation Reaction chamber interelectrode gap monitoring by capacitance measurement
US5527110A (en) * 1993-04-30 1996-06-18 International Business Machines Corporation Method and apparatus for detecting asperities on magnetic disks using thermal proximity imaging
US5810477A (en) * 1993-04-30 1998-09-22 International Business Machines Corporation System for identifying surface conditions of a moving medium
US6088176A (en) * 1993-04-30 2000-07-11 International Business Machines Corporation Method and apparatus for separating magnetic and thermal components from an MR read signal
JPH0757376A (ja) * 1993-08-18 1995-03-03 Hitachi Ltd 磁気ディスク装置及びディスクサブシステム
US5488524A (en) * 1993-12-21 1996-01-30 International Business Machines Corporation Self adaptive head for semi-contact recording
US6359746B1 (en) * 1994-09-14 2002-03-19 Kabushiki Kaisha Toshiba Magnetic disk drive
US5497085A (en) * 1994-12-19 1996-03-05 Conner Peripherals, Inc. Method for determining an outer diameter rolloff in a process for making magnetic disks
DE69614807T2 (de) * 1995-06-01 2002-04-04 Koninkl Philips Electronics Nv Magnetisches aufnahmegerät
JP3199996B2 (ja) * 1995-11-15 2001-08-20 株式会社東芝 ディスク記録再生システム及びそのヘッド浮上変動検出方法
US5872676A (en) * 1996-01-02 1999-02-16 International Business Machines Corporation Method and apparatus for positioning a dual element magnetoresistive head using thermal signals
US5739972A (en) * 1996-01-02 1998-04-14 Ibm Method and apparatus for positioning a magnetoresistive head using thermal response to servo information on the record medium
US5751510A (en) * 1996-01-02 1998-05-12 International Business Machines Corporation Method and apparatus for restoring a thermal response signal of a magnetoresistive head
US6046596A (en) * 1996-11-13 2000-04-04 Seagate Technology, Inc. Capacitance probe for magnetic recording head transducer to disc surface spacing measurement
US5753803A (en) * 1996-11-21 1998-05-19 International Business Machines Corporation Apparatus and methods for maintaining a substantially constant temperature in a thermal proximity sensor
US6239936B1 (en) 1997-08-19 2001-05-29 International Business Machines Corporation Method and apparatus for calibrating a thermal response of a magnetoresistive element
US6466392B1 (en) * 1998-09-14 2002-10-15 Seagate Technology Llc Head flight characterization using a non-contact voltmeter
WO2001041132A2 (en) 1999-12-02 2001-06-07 Seagate Technology Llc Fly height control over patterned media
US6717764B2 (en) * 2000-06-02 2004-04-06 Seagate Technology Llc Method and apparatus for head fly height measurement
US6568252B1 (en) 2000-07-13 2003-05-27 Seagate Technology Llc Flyability and glide methodology for 100 GPSI
US6728050B2 (en) * 2000-09-28 2004-04-27 Seagate Technology Llc Capacitance skip write detector
JP3934055B2 (ja) 2001-01-25 2007-06-20 シーゲイト テクノロジー エルエルシー 統合静電スライダ浮上高制御
WO2002095738A1 (en) * 2001-05-22 2002-11-28 Seagate Technology Llc Method and system for measuring fly height
CN1251186C (zh) * 2001-08-22 2006-04-12 西加特技术有限责任公司 关于静电飞行高度控制的系统和方法
US7199960B1 (en) * 2001-12-11 2007-04-03 Maxtor Corporation Disk drive with AC exciter for head/disk interface
US6907769B2 (en) * 2001-12-20 2005-06-21 Seagate Technology Llc Apparatus and method for detecting air contamination in fluid dynamic bearings
US6857937B2 (en) * 2002-05-30 2005-02-22 Komag, Inc. Lapping a head while powered up to eliminate expansion of the head due to heating
US6888693B2 (en) * 2002-09-13 2005-05-03 Seagate Technology Llc Disc drive slider with protruding electrostatic actuator electrode
US20040085670A1 (en) * 2002-11-05 2004-05-06 Seagate Technology Llc Method for measuring pad wear of padded slider with MRE cooling effect
US6967806B2 (en) * 2003-05-19 2005-11-22 Seagate Technology Llc Electrostatic actuator with multilayer electrode stack
US8139306B2 (en) * 2004-02-09 2012-03-20 Sae Magnetics (Hk) Ltd. Electrical current as probe for modulation at head-disk interface
US20050174665A1 (en) * 2004-02-09 2005-08-11 Xiaofeng Zhang Electrical current measurements at head-disk interface
JP2006215693A (ja) * 2005-02-02 2006-08-17 Mitsubishi Electric Corp 監視システム
US7333913B2 (en) * 2005-06-27 2008-02-19 General Electric Company Clearance measurement system and method of operation
US7256957B1 (en) 2006-01-04 2007-08-14 Marvell International Ltd. Circuits, systems, and methods for capacitive fly height measurement
JP2007213653A (ja) * 2006-02-07 2007-08-23 Fujitsu Ltd 間隔制御装置
US7405896B2 (en) * 2006-04-26 2008-07-29 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for detecting slider/disk fly-height modulation in a hard disk drive
US7440219B2 (en) 2006-11-28 2008-10-21 Sae Magnetics (H.K.) Ltd. Non-contact measurement of slider fly height by electrostatic force
US7450333B2 (en) * 2006-12-29 2008-11-11 Hitachi Global Storage Technologies Netherlands B.V. Electrostatic fly-height control
US20080266702A1 (en) * 2007-04-30 2008-10-30 Broadcom Corporation System for measuring head spacing (fly height) in a disk drive
US7719786B1 (en) * 2008-12-23 2010-05-18 Hitachi Global Storage Technologies Netherlands B.V. Active fly height control using radio frequency feedback
US7830634B2 (en) * 2008-12-23 2010-11-09 Hitachi Global Storage Technologies Netherlands, B.V. Head-disk contact detection and work function difference determination
US8611035B1 (en) 2012-02-06 2013-12-17 Western Digital (Fremont), Llc Capacitance sensor for determining a distance between a head and a magnetic storage medium
US9042208B1 (en) 2013-03-11 2015-05-26 Western Digital Technologies, Inc. Disk drive measuring fly height by applying a bias voltage to an electrically insulated write component of a head
US20140292354A1 (en) * 2013-03-27 2014-10-02 Texas Instruments Incorporated Capacitive sensor
US8837070B1 (en) 2013-04-22 2014-09-16 Seagate Technology Llc Capacitive clearance detection for a magnetic head
US9076474B1 (en) * 2014-12-23 2015-07-07 Western Digital Technologies, Inc. Data storage device attenuating thermal decay effect on fly height measurement
WO2017142583A1 (en) 2016-02-16 2017-08-24 L2 Drive Llc Active control of a read/write head for reduced head-media spacing

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FR2474176A1 (fr) * 1979-11-02 1981-07-24 Labo Electronique Physique Dispositif de couplage de deux fibres conductrices de lumiere
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JPS59216001A (ja) * 1983-05-23 1984-12-06 Nec Corp 集積回路モジユ−ル
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JPS62159385A (ja) * 1986-01-08 1987-07-15 Hitachi Ltd 磁気ヘツドの浮上量測定装置
CH666122A5 (fr) * 1986-04-10 1988-06-30 Hans Ulrich Meyer Capteur capacitif de position.

Also Published As

Publication number Publication date
US4931887A (en) 1990-06-05
DE3888160D1 (de) 1994-04-07
EP0326683A3 (en) 1990-01-31
EP0326683A2 (de) 1989-08-09
EP0326683B1 (de) 1994-03-02
JPH01210802A (ja) 1989-08-24

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee