CN1223997C - 磁头、磁性记录和再现装置、用于再现和记录磁性记录信息的方法 - Google Patents

磁头、磁性记录和再现装置、用于再现和记录磁性记录信息的方法 Download PDF

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Publication number
CN1223997C
CN1223997C CNB011118156A CN01111815A CN1223997C CN 1223997 C CN1223997 C CN 1223997C CN B011118156 A CNB011118156 A CN B011118156A CN 01111815 A CN01111815 A CN 01111815A CN 1223997 C CN1223997 C CN 1223997C
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CN
China
Prior art keywords
magnetic
guide
temperature
flux
recording medium
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Expired - Fee Related
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CNB011118156A
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English (en)
Chinese (zh)
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CN1336635A (zh
Inventor
伊藤显知
添谷进
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HGST Japan Ltd
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Hitachi Global Storage Technologies Japan Ltd
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    • 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
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3909—Arrangements using a magnetic tunnel junction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
    • 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
    • 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
    • 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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
    • 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
    • G11B5/3113—Details for improving the magnetic domain structure or avoiding the formation or displacement of undesirable magnetic domains
    • 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
    • G11B5/3116—Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks
    • 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
    • G11B5/3143—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding
    • G11B5/3146—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers
    • 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
    • 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
    • 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
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3916—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide
    • G11B5/3919—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
    • G11B13/045—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties combined recording by magnetic and optic means
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/0008—Magnetic conditionning of heads, e.g. biasing
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal
    • 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
    • G11B2005/3996—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 large or giant magnetoresistive effects [GMR], e.g. as generated in spin-valve [SV] devices
    • 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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
    • G11B5/2452—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track where the dimensions of the effective gap are controlled

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Nanotechnology (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electromagnetism (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Magnetic Heads (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
CNB011118156A 2000-07-28 2001-03-20 磁头、磁性记录和再现装置、用于再现和记录磁性记录信息的方法 Expired - Fee Related CN1223997C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP228874/2000 2000-07-28
JP2000228874A JP3839227B2 (ja) 2000-07-28 2000-07-28 磁気ヘッド、磁気記録再生装置、磁気記録情報の再生方法及び磁気記録方法

Publications (2)

Publication Number Publication Date
CN1336635A CN1336635A (zh) 2002-02-20
CN1223997C true CN1223997C (zh) 2005-10-19

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CNB011118156A Expired - Fee Related CN1223997C (zh) 2000-07-28 2001-03-20 磁头、磁性记录和再现装置、用于再现和记录磁性记录信息的方法

Country Status (6)

Country Link
US (2) US6728080B2 (https=)
EP (1) EP1176585B1 (https=)
JP (1) JP3839227B2 (https=)
KR (1) KR100786929B1 (https=)
CN (1) CN1223997C (https=)
TW (1) TW513709B (https=)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3839227B2 (ja) 2000-07-28 2006-11-01 株式会社日立グローバルストレージテクノロジーズ 磁気ヘッド、磁気記録再生装置、磁気記録情報の再生方法及び磁気記録方法
US7532434B1 (en) * 2001-09-06 2009-05-12 Schreck Erhard T Recessed write pole for perpendicular recording
US6888705B2 (en) * 2002-01-18 2005-05-03 Hitachi Global Storage Technologies Netherlands B.V. High linear density tunnel junction flux guide read head with in-stack longitudinal bias stack (LBS)
US7170721B2 (en) 2002-06-25 2007-01-30 Quantum Corporation Method of producing flux guides in magnetic recording heads
JP4144867B2 (ja) 2002-08-09 2008-09-03 株式会社日立グローバルストレージテクノロジーズ 磁気ディスク装置
JP4016857B2 (ja) * 2002-10-18 2007-12-05 ヤマハ株式会社 磁気センサ及びその製造方法
JP3835447B2 (ja) * 2002-10-23 2006-10-18 ヤマハ株式会社 磁気センサ、同磁気センサの製造方法及び同製造方法に適したマグネットアレイ
US7271981B2 (en) * 2003-11-20 2007-09-18 Seagate Technology Llc Ultrafast pulse field source utilizing optically induced magnetic transformation
US7290325B2 (en) 2004-08-13 2007-11-06 Quantum Corporation Methods of manufacturing magnetic heads with reference and monitoring devices
US7751154B2 (en) 2005-05-19 2010-07-06 Quantum Corporation Magnetic recording heads with bearing surface protections and methods of manufacture
US7869309B2 (en) * 2005-08-11 2011-01-11 Seagate Technology Llc Dual wire integrated WAMR/HAMR writing head
US7944780B2 (en) 2006-12-07 2011-05-17 Konica Minolta Opto, Inc. Magnetic recording device and magnetic recording head drive mechanism having a magnetic applying section of a specific length
JP4539672B2 (ja) * 2007-03-27 2010-09-08 Ｔｄｋ株式会社 熱アシスト磁気ヘッド、ヘッドジンバルアセンブリ及びハードディスク装置
US8270257B2 (en) * 2008-01-31 2012-09-18 Hitachi Global Storage Technologies Netherlands B.V. Thermally assisted recording systems with low loss light redirection structure
US8406090B2 (en) * 2008-03-04 2013-03-26 HGST Netherlands B.V. Laser power sensor for thermally assisted magnetic recording
US9245562B1 (en) 2015-03-30 2016-01-26 Western Digital (Fremont), Llc Magnetic recording writer with a composite main pole
JP6390728B2 (ja) * 2017-02-22 2018-09-19 Tdk株式会社 磁気センサとその製造方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6437702A (en) * 1987-07-31 1989-02-08 Matsushita Electric Industrial Co Ltd Magnetic head
JPH01224910A (ja) * 1988-03-03 1989-09-07 Fujitsu Ltd 薄膜磁気ヘッド
US5385637A (en) * 1992-12-07 1995-01-31 Read-Rite Corporation Stabilizing domains in inductive thin film heads
JPH06267034A (ja) * 1993-03-17 1994-09-22 Fujitsu Ltd 磁気抵抗効果型薄膜ヘッド
US5995339A (en) * 1993-03-18 1999-11-30 Fujitsu Limited Magnetoresistive head with a front flux guide and an embedded MR element
JPH07134804A (ja) * 1993-09-17 1995-05-23 Fujitsu Ltd 記録再生装置及び記録再生方法
US6118611A (en) * 1993-12-14 2000-09-12 Fujitsu Limited Signal reproducing circuit adapted to head utilizing magneto-resistive effect
US5930084A (en) * 1996-06-17 1999-07-27 International Business Machines Corporation Stabilized MR sensor and flux guide joined by contiguous junction
US5856891A (en) * 1997-01-22 1999-01-05 Vtc Inc. MR resistive-biasing scheme providing low noise high common-mode rejection and high supply rejection
JP2001507806A (ja) * 1997-10-29 2001-06-12 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 スピン−トンネル接合から成る磁界センサー
US5930087A (en) * 1997-11-20 1999-07-27 Hewlett-Packard Company Robust recording head for near-contact operation
WO1999053494A1 (en) * 1998-04-09 1999-10-21 Seagate Technology Llc Storage disk comprising depressions and/or raised features
JP3180785B2 (ja) * 1998-11-27 2001-06-25 日本電気株式会社 ヨーク型磁気抵抗効果ヘッド、ヨーク型磁気抵抗効果複合薄膜ヘッドおよび磁気記憶装置
JP3839227B2 (ja) * 2000-07-28 2006-11-01 株式会社日立グローバルストレージテクノロジーズ 磁気ヘッド、磁気記録再生装置、磁気記録情報の再生方法及び磁気記録方法

Also Published As

Publication number Publication date
EP1176585B1 (en) 2011-10-05
JP3839227B2 (ja) 2006-11-01
EP1176585A3 (en) 2007-03-21
CN1336635A (zh) 2002-02-20
US20020015251A1 (en) 2002-02-07
US6728080B2 (en) 2004-04-27
TW513709B (en) 2002-12-11
US6690526B2 (en) 2004-02-10
KR20020010447A (ko) 2002-02-04
JP2002050012A (ja) 2002-02-15
KR100786929B1 (ko) 2007-12-17
US20020012205A1 (en) 2002-01-31
EP1176585A2 (en) 2002-01-30

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