JPS5760566A - Magnetic head device - Google Patents

Magnetic head device

Info

Publication number
JPS5760566A
JPS5760566A JP13558580A JP13558580A JPS5760566A JP S5760566 A JPS5760566 A JP S5760566A JP 13558580 A JP13558580 A JP 13558580A JP 13558580 A JP13558580 A JP 13558580A JP S5760566 A JPS5760566 A JP S5760566A
Authority
JP
Japan
Prior art keywords
amount
floating
magnetic head
slider
exceeds
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.)
Pending
Application number
JP13558580A
Other languages
Japanese (ja)
Inventor
Masayoshi Amasaka
Takakore Sato
Minoru Takahashi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13558580A priority Critical patent/JPS5760566A/en
Publication of JPS5760566A publication Critical patent/JPS5760566A/en
Pending 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

Abstract

PURPOSE:To detect that the amount of floating of a magnetic head exceeds the range of suited amount, by detecting the change in a static capacitance between a slider surface and a disc surface. CONSTITUTION:Electrodes 7 are provided at four corners of a surface 5a of a slider 5, and the change in a static capacitance CD between the electrodes 7 and a surface 16a of a magnetic disc 16 can be detected at a static capacitance detection converter 9 respectively. Each converter 9 outputs an output VS corresponding to the amount of floating a magnetic head 2, that is, the amount of change in the floating H, of a slider 2. The output is compares with an upper limit VH and a lower limit VL of the amount of floating at each comparator 20. As a result, if the amount of floating exceeds a suitable amount range, the comparator 20 transmits an alarm signal to a failure detector 22. Further, the detector 22 outputs a detection signal S1 when one alarm signal is inputted to it. Thus, the amount of floating of the magnetic head which exceeds a range of suitable amount can be detected.
JP13558580A 1980-09-29 1980-09-29 Magnetic head device Pending JPS5760566A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13558580A JPS5760566A (en) 1980-09-29 1980-09-29 Magnetic head device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13558580A JPS5760566A (en) 1980-09-29 1980-09-29 Magnetic head device

Publications (1)

Publication Number Publication Date
JPS5760566A true JPS5760566A (en) 1982-04-12

Family

ID=15155256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13558580A Pending JPS5760566A (en) 1980-09-29 1980-09-29 Magnetic head device

Country Status (1)

Country Link
JP (1) JPS5760566A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795981A (en) * 1986-04-04 1989-01-03 International Business Machines Corporation Method for monitoring the performance of the head-disk-interface and device for preventing data losses due to magnetic head-disk-interferences
US4853810A (en) * 1985-11-19 1989-08-01 International Business Machines Corporation Method and apparatus for controlling the flying height of the head in a magnetic storage unit
US4931887A (en) * 1988-02-01 1990-06-05 International Business Machines Corporation Capacitive measurement and control of the fly height of a recording slider
US5020041A (en) * 1987-03-06 1991-05-28 Hitachi, Ltd. Magneto-optical memory apparatus having a floating magnetic head
US5021906A (en) * 1989-10-31 1991-06-04 International Business Machines Corporation Programmable air bearing slider including magnetic read/write element
US5105408A (en) * 1988-05-12 1992-04-14 Digital Equipment Corporation Optical head with flying lens
US5107471A (en) * 1989-10-11 1992-04-21 Sharp Kabushiki Kaisha Magnetic head having a rectangular configuration for use in a magneto-optical recording system
WO2002059880A3 (en) * 2001-01-25 2002-12-19 Seagate Technology Llc Integrated electrostatic slider fly height control
US7286314B2 (en) 2005-06-15 2007-10-23 Hitachi Global Storage Technologies Netherlands, B.V. Disk drive with localized clearance and contact potential measurement capability
US7310197B2 (en) 2005-06-15 2007-12-18 Hitachi Global Storage Technologies Netherlands, B.V. Simultaneous measurement of contact potential and slider body clearance in a magnetic disk drive
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

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853810A (en) * 1985-11-19 1989-08-01 International Business Machines Corporation Method and apparatus for controlling the flying height of the head in a magnetic storage unit
US4795981A (en) * 1986-04-04 1989-01-03 International Business Machines Corporation Method for monitoring the performance of the head-disk-interface and device for preventing data losses due to magnetic head-disk-interferences
US5020041A (en) * 1987-03-06 1991-05-28 Hitachi, Ltd. Magneto-optical memory apparatus having a floating magnetic head
US4931887A (en) * 1988-02-01 1990-06-05 International Business Machines Corporation Capacitive measurement and control of the fly height of a recording slider
US5105408A (en) * 1988-05-12 1992-04-14 Digital Equipment Corporation Optical head with flying lens
US5107471A (en) * 1989-10-11 1992-04-21 Sharp Kabushiki Kaisha Magnetic head having a rectangular configuration for use in a magneto-optical recording system
US5021906A (en) * 1989-10-31 1991-06-04 International Business Machines Corporation Programmable air bearing slider including magnetic read/write element
WO2002059880A3 (en) * 2001-01-25 2002-12-19 Seagate Technology Llc Integrated electrostatic slider fly height control
US6876509B2 (en) 2001-01-25 2005-04-05 Seagate Technology Llc Integrated electrostatic slider fly height control
US7286314B2 (en) 2005-06-15 2007-10-23 Hitachi Global Storage Technologies Netherlands, B.V. Disk drive with localized clearance and contact potential measurement capability
US7310197B2 (en) 2005-06-15 2007-12-18 Hitachi Global Storage Technologies Netherlands, B.V. Simultaneous measurement of contact potential and slider body clearance in a magnetic disk drive
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

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