New! View global litigation for patent families

WO1996030897A3 - Magnetic head and system for controlling the position of a magnetic head - Google Patents

Magnetic head and system for controlling the position of a magnetic head

Info

Publication number
WO1996030897A3
WO1996030897A3 PCT/IB1996/000185 IB9600185W WO1996030897A3 WO 1996030897 A3 WO1996030897 A3 WO 1996030897A3 IB 9600185 W IB9600185 W IB 9600185W WO 1996030897 A3 WO1996030897 A3 WO 1996030897A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
write
head
direction
longitudinal
magnetic
Prior art date
Application number
PCT/IB1996/000185
Other languages
French (fr)
Other versions
WO1996030897A2 (en )
Inventor
Eeltje Aize Draaisma
Abraham Hoogendoorn
Original Assignee
Philips Electronics Nv
Philips Norden Ab
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

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/33Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • G11B5/3967Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/31Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3103Structure or manufacture of integrated heads or heads mechanically assembled and electrically connected to a support or housing
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/31Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109Details
    • G11B5/313Disposition of layers
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/33Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/332Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using thin films
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/488Disposition of heads
    • G11B5/4886Disposition of heads relative to rotating disc
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/488Disposition of heads
    • G11B5/4893Disposition of heads relative to moving tape
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/54Disposition 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 into or out of its operative position or across tracks
    • G11B5/55Track change, selection or acquisition by displacement of the head
    • G11B5/5504Track change, selection or acquisition by displacement of the head across tape tracks
    • G11B5/5508Control circuits therefor
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/58Disposition 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/58Disposition 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
    • G11B5/584Disposition 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 for track following on tapes
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/008Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G11B5/00813Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
    • G11B5/00817Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on longitudinal tracks only, e.g. for serpentine format recording
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/265Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track
    • G11B5/2652Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track with more than one gap simultaneously operative
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/265Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track
    • G11B5/2652Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track with more than one gap simultaneously operative
    • G11B5/2654Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track with more than one gap simultaneously operative for recording or erasing
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/29Structure or manufacture of unitary devices formed of plural heads for more than one track
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/488Disposition of heads
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/58Disposition 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
    • G11B5/596Disposition 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 for track following on disks
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/58Disposition 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
    • G11B5/596Disposition 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 for track following on disks
    • G11B5/59633Servo formatting

Abstract

Write head, particularly a buried servowrite head provided with a head face (21) having a longitudinal direction (L) along which a magnetic recording medium can be relatively moved with respect to the magnetic head, and a width direction (W) oriented transversely to the longitudinal direction. In order to write signals simultaneously in various tracks the write head is provided with a structure having integrated, juxtaposed write units (25a; 25b) extending substantially transversely to the longitudinal direction and the width direction and each being provided with at least one write gap (27a; 27b). One write gap of the one write unit and one write gap of the other write unit of every two adjacent write units are situated in mutually different planes (P1; P2) which are oriented substantially transversely to the longitudinal direction.
PCT/IB1996/000185 1995-03-24 1996-03-11 Magnetic head and system for controlling the position of a magnetic head WO1996030897A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95200742 1995-03-24
EP95200742.5 1995-03-24

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE1996625418 DE69625418T2 (en) 1995-03-24 1996-03-11 Magnetic head and system to control the position of a magnetic head
EP19960903169 EP0760998B1 (en) 1995-03-24 1996-03-11 Magnetic head and system for controlling the position of a magnetic head
DE1996625418 DE69625418D1 (en) 1995-03-24 1996-03-11 Magnetic head and system to control the position of a magnetic head
JP52911796A JPH10501091A (en) 1995-03-24 1996-03-11 System for controlling the position of the magnetic head and the magnetic head

Publications (2)

Publication Number Publication Date
WO1996030897A2 true WO1996030897A2 (en) 1996-10-03
WO1996030897A3 true true WO1996030897A3 (en) 1997-01-16

Family

ID=8220123

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1996/000185 WO1996030897A3 (en) 1995-03-24 1996-03-11 Magnetic head and system for controlling the position of a magnetic head

Country Status (5)

Country Link
US (2) US5966276A (en)
EP (1) EP0760998B1 (en)
JP (1) JPH10501091A (en)
DE (2) DE69625418D1 (en)
WO (1) WO1996030897A3 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0824751A1 (en) * 1996-03-08 1998-02-25 Philips Electronics N.V. Multichannel magnetic head
US6061196A (en) * 1996-12-10 2000-05-09 Onstream, Inc. System for recording and/or reproducing information medium for use in the system, and magnetic write head and arrangement for formatting the medium
US5912778A (en) * 1996-12-10 1999-06-15 U.S. Philips Corporation System for recording and/or reproducing information medium for use in the system and magnetic head for formatting the medium
US6078463A (en) * 1997-10-24 2000-06-20 Tandberg Data Asa Method and system for generating a position error signal from recorded servo data tracks containing information represented by longitudinally spaced, magnetic transitions
EP0951719A1 (en) 1997-10-30 1999-10-27 OnStream, Inc. Method of and arrangement for formatting a magnetizable medium
JP2001513248A (en) * 1997-12-22 2001-08-28 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ System for recording and / or reproducing information, medium for use in the system, apparatus for formatting a magnetic embossing head and said medium
WO1999052099A1 (en) * 1998-04-02 1999-10-14 Koninklijke Philips Electronics N.V. Apparatus for recording data in parallel tracks
US6195230B1 (en) * 1998-04-27 2001-02-27 Intel Corporation Disk head assembly with multiple read and/or write transducers for improved performance
NL1013117C2 (en) * 1999-09-22 2001-03-27 Onstream B V ADR system.
WO2001046948A1 (en) * 1999-12-21 2001-06-28 Koninklijke Philips Electronics N.V. System for recording and/or reproducing information, magnetic write head and magnetic tape for use in the system
US6614607B1 (en) 1999-12-29 2003-09-02 Imation Corp. Servo pattern recording method and system
US6816344B2 (en) * 2001-01-17 2004-11-09 Hitachi Global Storage Technologies Japan, Ltd. Composite magnetic head arranged so the reproducing elements do not overlap a pole of a recording element
US6646830B2 (en) * 2001-06-07 2003-11-11 International Business Machines Corporation Monolithic magnetic read-while-write head apparatus and method of manufacture
US8810960B2 (en) * 2003-12-04 2014-08-19 Oracle America, Inc. Multi-head data storage device with plural data channels per head
US20050152066A1 (en) * 2004-01-08 2005-07-14 Imation Corp. System with matrix array of write heads and array of magnetoresistive (MR) read heads
US9837107B2 (en) * 2016-02-12 2017-12-05 International Business Machines Corporation Tape head with electrically conducting surface to reduce triboelectric charging

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846841A (en) * 1972-07-03 1974-11-05 Co Int Pour L Inf Multiple magnetic head devices
EP0517531A2 (en) * 1991-06-07 1992-12-09 Minnesota Mining And Manufacturing Company Multi-track servo recording head, resultant media containing pre-recorded servo track, and servo controlled head positioning system
EP0519674A2 (en) * 1991-06-20 1992-12-23 Matsushita Electric Industrial Co., Ltd. Laminated magneto-resistive head
DE4216896C2 (en) * 1991-05-22 1996-03-21 Sharp Kk Magnetic recording and reproducing apparatus positionseinstellbarem head

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859664A (en) * 1973-07-09 1975-01-07 Honeywell Inf Systems Batch fabricated thin-film transducers having a common pole with tunnel erase poles and a plurality of read/write poles
US4318141A (en) * 1979-12-07 1982-03-02 International Business Machines Corp. Buried servo recording systems and methods
US4439793A (en) * 1981-10-22 1984-03-27 Fuji Photo Film Co., Ltd. Thin film head array
JPH0664709B2 (en) * 1984-01-26 1994-08-22 キヤノン株式会社 The thin-film magnetic head
EP0194603B1 (en) * 1985-03-08 1992-05-27 Sony Corporation Combination magnetic transducer head apparatus
US4652945A (en) * 1985-05-03 1987-03-24 Eastman Kodak Company Flux sensitive tracking
JPH0668893B2 (en) * 1986-01-23 1994-08-31 日本電信電話株式会社 Positioning control method of a magnetic head
US4996609A (en) * 1989-02-22 1991-02-26 Pericomp Corporation Magnetic head recording multitrack servo patterns
US5121270A (en) * 1989-09-19 1992-06-09 Alcudia Ezra R Multitransducer head positioning servo for use in a bi-directional magnetic tape system
US5321570A (en) * 1989-10-02 1994-06-14 Behr Michael I Systems using superimposed, orthogonal buried servo signals
US5210667A (en) * 1991-02-19 1993-05-11 International Business Machines Corporation Magnetic recording heads employing multiple lapping guides
US5452165A (en) * 1994-03-16 1995-09-19 International Business Machines Corporation Close packed magnetic head linear array
US5488525A (en) * 1994-08-18 1996-01-30 International Business Machines Corporation Decoupled magnetic head assembly for quarter-inch tape

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846841A (en) * 1972-07-03 1974-11-05 Co Int Pour L Inf Multiple magnetic head devices
DE4216896C2 (en) * 1991-05-22 1996-03-21 Sharp Kk Magnetic recording and reproducing apparatus positionseinstellbarem head
EP0517531A2 (en) * 1991-06-07 1992-12-09 Minnesota Mining And Manufacturing Company Multi-track servo recording head, resultant media containing pre-recorded servo track, and servo controlled head positioning system
EP0519674A2 (en) * 1991-06-20 1992-12-23 Matsushita Electric Industrial Co., Ltd. Laminated magneto-resistive head

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Volume 15, No. 4, Sept. 1972, V. ZIMMERMANN et al., "Servo Control of Multielement Magnetic Heads", pages 1320-1321. *
IBM TECHNICAL DISCLOSURE BULLETIN, Volume 15, No. 6, November 1972, B.W. KINGTON, "Interleaved Multielement Magnetic Head", page 2035. *

Also Published As

Publication number Publication date Type
DE69625418D1 (en) 2003-01-30 grant
JPH10501091A (en) 1998-01-27 application
EP0760998A1 (en) 1997-03-12 application
US5966276A (en) 1999-10-12 grant
EP0760998B1 (en) 2002-12-18 grant
US6097571A (en) 2000-08-01 grant
WO1996030897A2 (en) 1996-10-03 application
DE69625418T2 (en) 2003-10-02 grant

Similar Documents

Publication Publication Date Title
US4408240A (en) Multichannel magnetic head for a recorder-reproducer system
WO1998013823A1 (en) Recording medium and its reproducer
JPH02165439A (en) Optical head and optical disk
JPS607644A (en) Recording and reproducing device of information
JPH0426959A (en) Synchronizing information recording and reproducing device
JPH0383226A (en) Recording medium
JPH0268721A (en) Optical memory element
JPH0231387A (en) Medium of high track density having optical servo track and method and device for inscribing track on medium
WO1992002014A1 (en) Magnetic head
WO1999008262A1 (en) Magnetic recorder/reproducer and magnetic recording/reproducing method
JPS61165801A (en) Helical scan magnetic recording and reproducing device
JPH03205607A (en) Thin-film magnetic head and production thereof
JPS6190318A (en) Tracking servo system
JPS5654676A (en) Digital magnetic record/reproduction system
JPS61129701A (en) Rotary magnetic sheet device
JPS63281285A (en) Magnetic head
DE2906956A1 (en) Multiple magnetic head adjuster - has two detectors assigned to magnetised control tracks next to information tracks and in separate branches of bridge circuit
JPH04157678A (en) Servo pattern system for magnetic disk
JPH01235048A (en) Electron beam disk recorder
JPH0478002A (en) Magnetic recording/reproducing device
JPH0346102A (en) Method for recording data in rotary head type magnetic tape unit
JPS6148157A (en) Magnetic recording and reproducing device
JPS59157810A (en) Recording and reproducing method of pcm signal
JPS58171702A (en) Reproducing device of magnetic recorded information
JPS63259804A (en) Recording system for magnetic tape device

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): CN JP

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

WWE Wipo information: entry into national phase

Ref document number: 1996903169

Country of ref document: EP

121 Ep: the epo has been informed by wipo that ep was designated in this application
AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

AK Designated states

Kind code of ref document: A3

Designated state(s): CN JP

WWP Wipo information: published in national office

Ref document number: 1996903169

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1996903169

Country of ref document: EP