WO1994005007A3 - Ensemble tete de lecture et d'ecriture magnetoresistive bidirectionnelle a couche mince - Google Patents

Ensemble tete de lecture et d'ecriture magnetoresistive bidirectionnelle a couche mince Download PDF

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Publication number
WO1994005007A3
WO1994005007A3 PCT/US1993/007458 US9307458W WO9405007A3 WO 1994005007 A3 WO1994005007 A3 WO 1994005007A3 US 9307458 W US9307458 W US 9307458W WO 9405007 A3 WO9405007 A3 WO 9405007A3
Authority
WO
WIPO (PCT)
Prior art keywords
head assembly
tape head
film magnetoresistive
read
bidirectional thin
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.)
Ceased
Application number
PCT/US1993/007458
Other languages
English (en)
Other versions
WO1994005007A2 (fr
WO1994005007B1 (fr
Inventor
Theodore A Schwarz
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to KR1019950700649A priority Critical patent/KR950703195A/ko
Priority to DE69314960T priority patent/DE69314960T2/de
Priority to JP50634194A priority patent/JP3822230B2/ja
Priority to EP93918697A priority patent/EP0657059B1/fr
Publication of WO1994005007A2 publication Critical patent/WO1994005007A2/fr
Publication of WO1994005007A3 publication Critical patent/WO1994005007A3/fr
Publication of WO1994005007B1 publication Critical patent/WO1994005007B1/fr
Priority to NO950638A priority patent/NO950638L/no
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure 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
    • G11B5/3903—Structure 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
    • G11B5/3967—Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read
    • 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
    • G11B5/3103—Structure or manufacture of integrated heads or heads mechanically assembled and electrically connected to a support or 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
    • G11B5/4893—Disposition of heads relative to moving tape
    • 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
    • G11B5/584—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 for track following on tapes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

Ensemble tête (180) de lecture et d'écriture. On minimise l'usure de l'ensemble tête en: (1) minimisant la distance entre les éléments de lecture (186, 200) et leurs éléments d'écriture respectifs (198, 188), (2) fabriquant l'ensemble tête à partir de matériaux durs, et (3) plaçant un bloc dur (69) entre les éléments de lecture et d'écriture. L'ensemble tête utilise uniquement une paire d'éléments de lecture et d'écriture par piste de données, mais les paires sont inversées l'une par rapport à l'autre, de sorte que l'ensemble tête soit capable d'effectuer simultanément la lecture et l'écriture sur la bande dans les deux directions (215, 225).
PCT/US1993/007458 1992-08-21 1993-08-10 Ensemble tete de lecture et d'ecriture magnetoresistive bidirectionnelle a couche mince Ceased WO1994005007A2 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1019950700649A KR950703195A (ko) 1992-08-21 1993-08-10 양방향성 박막 자기저항 테이프 헤드 조립체(bidirectional thin-film magnetoresistive tape head assembly)
DE69314960T DE69314960T2 (de) 1992-08-21 1993-08-10 Bidirektionale magnetoresistive dünnfilmbandkopfanordnung
JP50634194A JP3822230B2 (ja) 1992-08-21 1993-08-10 両走行方向テープ用磁気抵抗性薄膜式ヘッド・アセンブリ
EP93918697A EP0657059B1 (fr) 1992-08-21 1993-08-10 Ensemble tete de lecture et d'ecriture magnetoresistive bidirectionnelle a couche mince
NO950638A NO950638L (no) 1992-08-21 1995-02-20 Toveis magnethodemontasje med magnetoresistiv tynnfilm

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/933,383 1992-08-21
US07/933,383 US5331493A (en) 1992-08-21 1992-08-21 Bidirectional thin-film magnetoresistive tape head assembly

Publications (3)

Publication Number Publication Date
WO1994005007A2 WO1994005007A2 (fr) 1994-03-03
WO1994005007A3 true WO1994005007A3 (fr) 1994-04-28
WO1994005007B1 WO1994005007B1 (fr) 1994-07-07

Family

ID=25463837

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/007458 Ceased WO1994005007A2 (fr) 1992-08-21 1993-08-10 Ensemble tete de lecture et d'ecriture magnetoresistive bidirectionnelle a couche mince

Country Status (7)

Country Link
US (2) US5331493A (fr)
EP (1) EP0657059B1 (fr)
JP (1) JP3822230B2 (fr)
KR (1) KR950703195A (fr)
CN (3) CN1532813A (fr)
DE (1) DE69314960T2 (fr)
WO (1) WO1994005007A2 (fr)

Families Citing this family (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0452846B1 (fr) * 1990-04-16 1996-02-28 Hitachi, Ltd. Tête magnétique à film mince pour piste étroite et sa méthode de fabrication
JP2982931B2 (ja) * 1993-05-17 1999-11-29 富士通株式会社 磁気抵抗効果型ヘッド及びその製造方法
US5644455A (en) * 1993-12-30 1997-07-01 Seagate Technology, Inc. Amorphous diamond-like carbon gaps in magnetoresistive heads
US5452164A (en) * 1994-02-08 1995-09-19 International Business Machines Corporation Thin film magnetic write head
TW248602B (en) * 1994-05-31 1995-06-01 Ibm Magnetoresistive head with asymmetric leads
JPH08171712A (ja) * 1994-08-26 1996-07-02 Aiwa Co Ltd 側面露出型薄膜磁気ヘッド並びにその製造方法
US5568335A (en) * 1994-12-29 1996-10-22 International Business Machines Corporation Multi-layer gap structure for high resolution magnetoresistive read head
SG34292A1 (en) * 1994-12-30 1996-12-06 Ibm Read/write magnetoresistive (MR) head with sunken components
US6038106A (en) * 1995-05-10 2000-03-14 International Business Machines Corporation Piggyback magneto-resistive read/write tape head with optimized process for same gap read/write
US6278577B1 (en) 1995-05-10 2001-08-21 International Business Machines, Corp. Asymmetric recording head for same gap servo optimization
US5901021A (en) * 1995-05-19 1999-05-04 Sanyo Electric Co., Ltd. Thin-film magnetic head
US5681426A (en) * 1995-12-13 1997-10-28 Seagate Technology, Inc. Diamond-like carbon wet etchant stop for formation of magnetic transducers
US5640292A (en) * 1996-01-17 1997-06-17 Seagate Technology, Inc. Diamond-like carbon encapsulation of magnetic heads
US5897246A (en) * 1996-03-29 1999-04-27 Hitachi Metals, Ltd. Magnet roll and developing method using the same
EP0821348A3 (fr) * 1996-07-25 1998-03-04 Read-Rite Corporation Tête magnétique découplée
US5946156A (en) * 1997-03-04 1999-08-31 Imation Corp. Tape servo system and methods, write/read heads, and servo track configurations regarding same
US5930086A (en) * 1997-05-02 1999-07-27 Storage Technology Corporation Heat exchangeable thin-film recording head element and method for manufacturing same
US5973891A (en) * 1997-05-21 1999-10-26 Quantum Corporation Data transducer and method for writing data utilizing the bottom pole as the trailing edge of a thin-film magnetic tape write head
US5905613A (en) * 1997-07-18 1999-05-18 International Business Machines Corporation Bidirectional flat contour linear tape recording head and drive
US5923506A (en) * 1997-10-03 1999-07-13 Storage Technology Corporation Recording head element with improved coil tap and method for manufacturing same
US6392840B1 (en) * 1997-12-08 2002-05-21 International Business Machines Corporation Planarized side by side design of an inductive writer and single metallic magnetoresistive reader
CN1146868C (zh) * 1998-07-21 2004-04-21 西加特技术有限责任公司 磁头传感器的散热器件及其散热方法
US6115217A (en) * 1998-09-10 2000-09-05 Storage Technology Corporation Multi-element read/write tape head with low feedthrough
US6223420B1 (en) 1998-12-04 2001-05-01 International Business Machines Corporation Method of making a read head with high resistance soft magnetic flux guide layer for enhancing read sensor efficiency
US6178070B1 (en) 1999-02-11 2001-01-23 Read-Rite Corporation Magnetic write head and method for making same
US6765756B1 (en) 1999-03-12 2004-07-20 Western Digital (Fremont), Inc. Ultra-short yoke and ultra-low stack height writer and method of fabrication
US6532823B1 (en) 1999-03-18 2003-03-18 Read-Rite Corporation Insulator layers for magnetoresistive transducers
US6330123B1 (en) 1999-05-28 2001-12-11 Imation Corp. Head assembly having a single pass servo writer
US6762910B1 (en) 1999-06-03 2004-07-13 Western Digital (Fremont), Inc. Data storage and retrieval apparatus with thin film read head having inset extra gap insulation layer and method of fabrication
US6542321B1 (en) * 1999-12-29 2003-04-01 Imation Corp. Bidirectional read-while-write data recording system
US6417989B1 (en) * 2000-06-14 2002-07-09 Aiwa Co., Ltd. Multiple-gap magnetic thin-film head with improved read/write coil arrangement
US6424496B1 (en) * 2000-06-14 2002-07-23 Quantum Corporation Variable width flat tape head for bi-directional contact recording and method for making the same
US6570738B1 (en) * 2000-08-03 2003-05-27 Storage Technology Corporation Tape head modules having adjacent substrates each provided with write and/or read elements
US6639753B1 (en) * 2000-09-01 2003-10-28 Hewlett-Packard Development Company, L.P. Method of forming a head assembly, a head assembly, and a linear tape drive
US6819528B1 (en) 2000-10-25 2004-11-16 Storage Technology Corporation Asymmetric servo reader placement in bi-directional tape head
US6801408B1 (en) 2000-11-02 2004-10-05 Western Digital (Fremont), Inc. Data storage and retrieval apparatus with thin film read head having a planar sensor element and an extra gap and method of fabrication thereof
US6468376B2 (en) 2001-01-03 2002-10-22 International Business Machines Corporation Precision bonding method and apparatus
US6646830B2 (en) * 2001-06-07 2003-11-11 International Business Machines Corporation Monolithic magnetic read-while-write head apparatus and method of manufacture
US6826020B2 (en) * 2001-08-20 2004-11-30 Storage Technology Corporation Merged-pole magnetic head having inverted write elements
US6781792B2 (en) * 2001-08-23 2004-08-24 International Business Machines Corporation Method and apparatus for providing tape head assemblies having U-shaped support beams for very high density recording
US6882503B2 (en) * 2002-01-29 2005-04-19 Headway Technologies, Inc. Thin-film magnetic head and method of manufacturing same, and slider of thin-film magnetic head and method of manufacturing same
JP2003338012A (ja) * 2002-05-15 2003-11-28 Sony Corp 磁気記録ヘッド装置、磁気再生ヘッド装置及び磁気ヘッド装置並びにこれらを用いたテープドライブ装置及びディスクドライブ装置
US6970331B1 (en) * 2002-08-20 2005-11-29 Storage Technology Corporation Magnetic recording head having modules with opposing read elements and opposing periodic structures
US7196866B2 (en) * 2003-12-17 2007-03-27 Hewlett-Packard Development Company, L.P. Interconnect structure having multiple layers of traces for electrical connection to a tape head assembly
US20050152066A1 (en) * 2004-01-08 2005-07-14 Imation Corp. System with matrix array of write heads and array of magnetoresistive (MR) read heads
US7692893B2 (en) * 2004-06-30 2010-04-06 Hitachi Global Storage Technologies Netherlands, B.V. Side-by-side magnetic head configuration with flared pole tip layer and read sensor sharing same plane
US7251878B2 (en) * 2004-06-30 2007-08-07 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for defining leading edge taper of a write pole tip
JP2006029900A (ja) * 2004-07-14 2006-02-02 Tdk Corp エンコーダ用磁気センサ
US7405907B2 (en) * 2004-08-03 2008-07-29 O-Mass As Adjacent magnetoresistive read head and method for obtaining position error signal
US7551393B2 (en) * 2004-08-23 2009-06-23 International Business Machines Corporation Tape recording head with multiple planes of transducer arrays
US7298586B1 (en) * 2004-09-07 2007-11-20 Storage Technology Corporation Thin-film read element with multiple read sensors
US7564656B2 (en) * 2005-02-28 2009-07-21 Hitachi Global Storage Technologies Netherlands B.V. Integrated servo and read EMR sensor
US7675710B2 (en) * 2006-06-07 2010-03-09 Sun Microsystems, Inc. Tape drive with read/write head having legacy read elements and with special-purpose read channels
US7924533B2 (en) * 2006-06-15 2011-04-12 Tdk Corporation Multi-channel head
US20080068752A1 (en) * 2006-09-19 2008-03-20 International Business Machines Corporation Planar Bidirectional Tape Head With Planar Read And Write Elements
US8694280B2 (en) * 2009-09-28 2014-04-08 International Business Machines Corporation Servo control circuit for detecting analytes via nanoparticle-labeled substances with electromagnetic read-write heads
US9304130B2 (en) 2010-12-16 2016-04-05 International Business Machines Corporation Trenched sample assembly for detection of analytes with electromagnetic read-write heads
US9040311B2 (en) * 2011-05-03 2015-05-26 International Business Machines Corporation Calibration assembly for aide in detection of analytes with electromagnetic read-write heads
US9435800B2 (en) 2012-09-14 2016-09-06 International Business Machines Corporation Sample assembly with an electromagnetic field to accelerate the bonding of target antigens and nanoparticles
US9208809B2 (en) 2013-05-01 2015-12-08 International Business Machines Corporation Magnetic head and system having offset arrays
US9449628B2 (en) 2013-05-01 2016-09-20 International Business Machines Corporation Quasi-statically oriented, bi-directional tape recording head
US9418684B2 (en) * 2013-10-04 2016-08-16 Seagate Technology Llc Magnetic read head with separately addressable read transducers
US9111557B2 (en) * 2013-10-04 2015-08-18 Seagate Technology Llc Electrically insulating magnetic material for a read head
US9583126B1 (en) 2015-10-23 2017-02-28 International Business Machines Corporation Dual-path flex circuit
US9466334B1 (en) 2015-10-23 2016-10-11 International Business Machines Corporation Monolithic tape head and actuator for high density recording
US9741388B2 (en) 2015-10-23 2017-08-22 International Business Machines Corporation Magnetic tape appliance with selectably always-leading head assemblies
GB2557564B (en) * 2016-06-22 2020-10-28 Insurgo Media Services Ltd Magnetic head
US11688427B1 (en) 2022-02-24 2023-06-27 Western Digital Technologies, Inc. Angled free layer for multi-level read signals
CN120164495B (zh) * 2023-12-15 2026-01-09 华为技术有限公司 磁头、磁带机和磁带存储机架

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5275421A (en) * 1975-12-20 1977-06-24 Nec Corp Compound multielement magnetic head
JPS58212614A (ja) * 1982-06-03 1983-12-10 Mitsubishi Electric Corp 複合形薄膜磁気ヘツド
JPS59210520A (ja) * 1983-05-14 1984-11-29 Yukio Ichinose 磁気ヘツド
EP0131727A2 (fr) * 1983-07-18 1985-01-23 International Business Machines Corporation Entraînement à bande bi-directionnel, à "lecture-après-écriture", comportant une tête à deux modules
JPS6142715A (ja) * 1984-08-03 1986-03-01 Fuji Photo Film Co Ltd 薄膜磁気ヘツド
JPS61198411A (ja) * 1985-02-05 1986-09-02 Victor Co Of Japan Ltd 薄膜磁気ヘツド
US4639808A (en) * 1984-09-26 1987-01-27 Storage Technology Corporation Asymmetrical shields for controlling feedthrough in read/write heads
JPS6457413A (en) * 1987-08-27 1989-03-03 Matsushita Electric Industrial Co Ltd Thin film magnetic head
EP0348169A2 (fr) * 1988-06-23 1989-12-27 Sharp Kabushiki Kaisha Tête magnétique en couches minces
EP0383957A1 (fr) * 1989-01-27 1990-08-29 Tandberg Data A/S Procédé et dispositif pour le positionnement d'une tête magnétique d'une mémoire à couches magnétiques
US4967300A (en) * 1983-10-14 1990-10-30 Applied Magnetics Corporation Magnetic head assembly having a transverse guiding surface formed of a mixture of aluminum oxide and titanium carbide
EP0517531A2 (fr) * 1991-06-07 1992-12-09 Minnesota Mining And Manufacturing Company Tête multi-piste d'enregistrement de données d'asservissement, support correspondant ayant une piste d'asservissement pré-enregistrée, et système de positionnement de tête asservie

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4277540A (en) * 1971-05-03 1981-07-07 Aine Harry E Thin film magnetic recording medium
US3967368A (en) * 1972-10-11 1976-07-06 International Business Machines Corporation Method for manufacturing and using an internally biased magnetoresistive magnetic transducer
US3881190A (en) * 1973-09-20 1975-04-29 Ibm Shielded magnetoresistive magnetic transducer and method of manufacture thereof
US3887945A (en) * 1973-12-12 1975-06-03 Ibm Head assembly for recording and reading, employing inductive and magnetoresistive elements
US4302790B1 (en) * 1979-04-11 1999-06-08 Eastman Kodak Co Magnetic recording head with effective magnetic gap length less than about 15mu inches
US4255772A (en) * 1979-06-29 1981-03-10 International Business Machines Corporation Read/write magnetic head assembly with magnetoresistive sensor
US4797767A (en) * 1986-11-20 1989-01-10 American Magnetics Corporation Digital magnetic head structure
FR2622338B1 (fr) * 1987-10-27 1990-01-26 Thomson Csf Tete magnetique d'enregistrement-lecture a couche anti-abrasion et procede de realisation
US4928188A (en) * 1988-07-05 1990-05-22 Eastman Kodak Company Magnetoresistive element sandwiched between a sal ferrite substrateand a cover containing an easy axis biasing magnet
US5055318A (en) * 1988-10-11 1991-10-08 Beamalloy Corporation Dual ion beam ballistic alloying process
US5055957A (en) * 1989-06-19 1991-10-08 International Business Machines Corporation Method of making low wear glass for magnetic heads
US5034838A (en) * 1990-05-08 1991-07-23 Eastman Kodak Company Bi-directional read while write magnetic head assembly having a wear avoidance contour
US5208714A (en) * 1990-12-26 1993-05-04 International Business Machines Corporation Magnetic hybrid interleaved head with closure supporting islands
US5161299A (en) * 1990-12-26 1992-11-10 International Business Machines Corporation Method of making a magnetic hybrid interleaved head
US5079831A (en) * 1991-02-07 1992-01-14 Applied Magnetics Corporation Method of making a dual stripe magnetic head
US5210667A (en) * 1991-02-19 1993-05-11 International Business Machines Corporation Magnetic recording heads employing multiple lapping guides
US5229895A (en) * 1991-06-07 1993-07-20 Minnesota Mining And Manufacturing Company Multi-track servo recording head assembly
US5218498A (en) * 1991-06-20 1993-06-08 Eastman Kodak Company Composite read-while-write magnetic head assembly
US5212611A (en) * 1991-07-16 1993-05-18 Storage Technology Corporation Integral read/write recording head with dual gap dimension
US5212680A (en) * 1991-10-10 1993-05-18 International Business Machines Corporation Mass storage device employing array of transducers "cocked" in relation to reciprocal movement axis

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5275421A (en) * 1975-12-20 1977-06-24 Nec Corp Compound multielement magnetic head
JPS58212614A (ja) * 1982-06-03 1983-12-10 Mitsubishi Electric Corp 複合形薄膜磁気ヘツド
JPS59210520A (ja) * 1983-05-14 1984-11-29 Yukio Ichinose 磁気ヘツド
EP0131727A2 (fr) * 1983-07-18 1985-01-23 International Business Machines Corporation Entraînement à bande bi-directionnel, à "lecture-après-écriture", comportant une tête à deux modules
US4967300A (en) * 1983-10-14 1990-10-30 Applied Magnetics Corporation Magnetic head assembly having a transverse guiding surface formed of a mixture of aluminum oxide and titanium carbide
JPS6142715A (ja) * 1984-08-03 1986-03-01 Fuji Photo Film Co Ltd 薄膜磁気ヘツド
US4639808A (en) * 1984-09-26 1987-01-27 Storage Technology Corporation Asymmetrical shields for controlling feedthrough in read/write heads
JPS61198411A (ja) * 1985-02-05 1986-09-02 Victor Co Of Japan Ltd 薄膜磁気ヘツド
JPS6457413A (en) * 1987-08-27 1989-03-03 Matsushita Electric Industrial Co Ltd Thin film magnetic head
US5027245A (en) * 1987-08-27 1991-06-25 Matsushita Electric Industrial Co., Ltd. Magnetic head for multi-track recording having read and write transducers formed by thin-film technology
EP0348169A2 (fr) * 1988-06-23 1989-12-27 Sharp Kabushiki Kaisha Tête magnétique en couches minces
EP0383957A1 (fr) * 1989-01-27 1990-08-29 Tandberg Data A/S Procédé et dispositif pour le positionnement d'une tête magnétique d'une mémoire à couches magnétiques
EP0517531A2 (fr) * 1991-06-07 1992-12-09 Minnesota Mining And Manufacturing Company Tête multi-piste d'enregistrement de données d'asservissement, support correspondant ayant une piste d'asservissement pré-enregistrée, et système de positionnement de tête asservie

Non-Patent Citations (9)

* Cited by examiner, † Cited by third party
Title
"Read write servo magnetic head", IBM TECHNICAL DISCLOSURE BULLETIN, vol. 20, no. 9, February 1978 (1978-02-01), ARMONK, N. Y., US, pages 3673 - 3674 *
PATENT ABSTRACTS OF JAPAN vol. 1, no. 138 (E - 063) 12 November 1977 (1977-11-12) *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 198 (P - 476)<2254> 11 July 1986 (1986-07-11) *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 029 (P - 540) 28 January 1987 (1987-01-28) *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 263 (P - 886)<3611> 19 June 1989 (1989-06-19) *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 65 (P - 263)<1502> 27 March 1984 (1984-03-27) *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 79 (P - 347)<1802> 9 April 1985 (1985-04-09) *
T. W. S. STENNING: "Interleaved multielement magnetic heads", IBM TECHNICAL DISCLOSURE BULLETIN, vol. 14, no. 7, December 1971 (1971-12-01), ARMONK, N. Y., US, pages 2129 *
W. D. DOYLE, IEEE TRANSACTIONS ON MAGNETICS, vol. 26, no. 5, September 1990 (1990-09-01), NEW YORK US, pages 2152 - 2156, XP000150505 *

Also Published As

Publication number Publication date
EP0657059A1 (fr) 1995-06-14
CN1149540C (zh) 2004-05-12
DE69314960D1 (de) 1997-12-04
JP3822230B2 (ja) 2006-09-13
KR950703195A (ko) 1995-08-23
JPH08500462A (ja) 1996-01-16
US5541793A (en) 1996-07-30
WO1994005007A2 (fr) 1994-03-03
CN1237756A (zh) 1999-12-08
CN1532813A (zh) 2004-09-29
EP0657059B1 (fr) 1997-10-29
CN1051394C (zh) 2000-04-12
US5331493A (en) 1994-07-19
DE69314960T2 (de) 1998-02-26
CN1083614A (zh) 1994-03-09

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