WO2008152704A1 - Magnetic head and method of controlling magnetic head - Google Patents

Magnetic head and method of controlling magnetic head Download PDF

Info

Publication number
WO2008152704A1
WO2008152704A1 PCT/JP2007/061892 JP2007061892W WO2008152704A1 WO 2008152704 A1 WO2008152704 A1 WO 2008152704A1 JP 2007061892 W JP2007061892 W JP 2007061892W WO 2008152704 A1 WO2008152704 A1 WO 2008152704A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic head
controlling
heating element
levitation amount
head
Prior art date
Application number
PCT/JP2007/061892
Other languages
French (fr)
Japanese (ja)
Inventor
Toshiyuki Matsumura
Original Assignee
Fujitsu Limited
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 Limited filed Critical Fujitsu Limited
Priority to PCT/JP2007/061892 priority Critical patent/WO2008152704A1/en
Publication of WO2008152704A1 publication Critical patent/WO2008152704A1/en

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
    • G11B5/127—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
    • 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
    • G11B5/6064—Control of flying height using air pressure
    • 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

Abstract

A magnetic head whose levitation amount can be accurately controlled when the levitation amount of the magnetic head is controlled by using thermal expansion thereof by a heating element and therefore is capable of stable recording and reproduction of information, and a method of controlling the magnetic head. The magnetic head (50) having a read head (35) and a write head (39) comprises the heating element (40) which makes the magnetic head (50) thermally expand, projecting a portion of the magnetic head opposite to a recording medium, and thereby adjusts the levitation amount of the magnetic head, and a piezoelectric material layer (52) to be used as a monitor when controlling the levitation amount of the magnetic head by detecting the displacement of the magnetic head (50) by the thermal expansion and controlling continuity to the heating element (40).
PCT/JP2007/061892 2007-06-13 2007-06-13 Magnetic head and method of controlling magnetic head WO2008152704A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/061892 WO2008152704A1 (en) 2007-06-13 2007-06-13 Magnetic head and method of controlling magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/061892 WO2008152704A1 (en) 2007-06-13 2007-06-13 Magnetic head and method of controlling magnetic head

Publications (1)

Publication Number Publication Date
WO2008152704A1 true WO2008152704A1 (en) 2008-12-18

Family

ID=40129321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/061892 WO2008152704A1 (en) 2007-06-13 2007-06-13 Magnetic head and method of controlling magnetic head

Country Status (1)

Country Link
WO (1) WO2008152704A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090262460A1 (en) * 2005-04-27 2009-10-22 Seagate Technology Llc Head assembly having a sensing element
JP2011035378A (en) * 2009-08-04 2011-02-17 Seagate Technology Llc System for poling piezoelectric element, method for poling array of ferroelectric element, and slider

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1153856A (en) * 1997-07-31 1999-02-26 Samsung Electron Co Ltd Method and apparatus for controlling floating of magnetic head of hard disk drive
JP2003272335A (en) * 2002-03-13 2003-09-26 Toshiba Corp Magnetic disk device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1153856A (en) * 1997-07-31 1999-02-26 Samsung Electron Co Ltd Method and apparatus for controlling floating of magnetic head of hard disk drive
JP2003272335A (en) * 2002-03-13 2003-09-26 Toshiba Corp Magnetic disk device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090262460A1 (en) * 2005-04-27 2009-10-22 Seagate Technology Llc Head assembly having a sensing element
US8310779B2 (en) * 2005-04-27 2012-11-13 Seagate Technology Llc Head assembly having a sensing element
US8837075B2 (en) 2005-04-27 2014-09-16 Seagate Technology Llc Head assembly with head-media spacing control
JP2011035378A (en) * 2009-08-04 2011-02-17 Seagate Technology Llc System for poling piezoelectric element, method for poling array of ferroelectric element, and slider
US8937790B2 (en) 2009-08-04 2015-01-20 Seagate Technology Llc Commonly-poled piezoelectric device

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