JPH11316916A - 近接触動作用頑強記録ヘッド - Google Patents

近接触動作用頑強記録ヘッド

Info

Publication number
JPH11316916A
JPH11316916A JP10341064A JP34106498A JPH11316916A JP H11316916 A JPH11316916 A JP H11316916A JP 10341064 A JP10341064 A JP 10341064A JP 34106498 A JP34106498 A JP 34106498A JP H11316916 A JPH11316916 A JP H11316916A
Authority
JP
Japan
Prior art keywords
recording head
magnetic flux
head according
flux guide
magnetic
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
JP10341064A
Other languages
English (en)
Japanese (ja)
Other versions
JPH11316916A5 (enExample
Inventor
James A Brug
ジェームス・エイ・ブラグ
Manoj K Bhattacharyya
マノジ・ケー・バタチャルヤ
Lung T Tran
ラング・ティ・トラン
Thomas C Anthony
トーマス・シー・アンソニー
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.)
HP Inc
Original Assignee
Hewlett Packard 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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of JPH11316916A publication Critical patent/JPH11316916A/ja
Publication of JPH11316916A5 publication Critical patent/JPH11316916A5/ja
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
    • G11B5/127—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
    • 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
    • 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
    • G11B5/332—Structure 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
    • 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
    • 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
    • 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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/40—Protective measures on heads, e.g. against excessive temperature 
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
    • H01F10/324—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer
    • H01F10/3268—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • 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
    • G11B5/10—Structure or manufacture of housings or shields for heads
    • G11B5/11—Shielding of head against electric or magnetic fields
    • 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
    • G11B5/3912—Arrangements in which the active read-out elements are transducing in association with active magnetic shields, e.g. magnetically coupled shields
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Nanotechnology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Heads (AREA)
  • Hall/Mr Elements (AREA)
JP10341064A 1997-11-20 1998-11-13 近接触動作用頑強記録ヘッド Pending JPH11316916A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US974,420 1997-11-20
US08/974,420 US5930087A (en) 1997-11-20 1997-11-20 Robust recording head for near-contact operation

Publications (2)

Publication Number Publication Date
JPH11316916A true JPH11316916A (ja) 1999-11-16
JPH11316916A5 JPH11316916A5 (enExample) 2005-12-22

Family

ID=25522020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10341064A Pending JPH11316916A (ja) 1997-11-20 1998-11-13 近接触動作用頑強記録ヘッド

Country Status (4)

Country Link
US (1) US5930087A (enExample)
EP (1) EP0918319B1 (enExample)
JP (1) JPH11316916A (enExample)
DE (1) DE69830555T2 (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6552882B1 (en) 1998-09-01 2003-04-22 Nec Corporation Information reproduction head apparatus and information recording/reproduction system
US6930862B2 (en) * 2002-01-07 2005-08-16 Hitachi Global Storage Technologies Netherlands B.V. Shielded extraordinary magnetoresistance head
US7161773B2 (en) * 2002-01-18 2007-01-09 Hitachi Global Storage Technologies Netherlands B.V. High linear density tunnel junction flux guide read head with in-stack longitudinal bias stack (LBS)
JP2007158369A (ja) * 2002-11-01 2007-06-21 Nec Corp 磁気抵抗デバイス及びその製造方法
US7742263B2 (en) 2002-11-01 2010-06-22 Nec Corporation Magnetoresistance device with a diffusion barrier between a conductor and a magnetoresistance element and method of fabricating the same
US20110085261A1 (en) * 2009-10-14 2011-04-14 Hitachi Global Storage Technologies Netherlands B.V. Magnetoresistive magnetic head having a non-magnetic part on a medium facing surface side of the sensor

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6064552A (en) * 1997-03-18 2000-05-16 Kabushiki Kaisha Toshiba Magnetoresistive head having magnetic yoke and giant magnetoresistive element such that a first electrode is formed on the giant magnetoresistive element which in turn is formed on the magnetic yoke which acts as a second electrode
JPH11354859A (ja) * 1998-06-05 1999-12-24 Read Rite Smi Kk 磁気抵抗素子と磁気ヘッド
US6219212B1 (en) 1998-09-08 2001-04-17 International Business Machines Corporation Magnetic tunnel junction head structure with insulating antiferromagnetic layer
US6137661A (en) * 1998-10-19 2000-10-24 Read-Rite Corporation System for providing a magnetoresistive head having higher efficiency
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
KR100594158B1 (ko) * 1999-03-25 2006-06-28 삼성전자주식회사 자기헤드 장치 및 제조방법
KR20010075246A (ko) * 1999-07-22 2001-08-09 요트.게.아. 롤페즈 자기 터널 접합소자의 제조방법
US6510030B1 (en) 1999-08-17 2003-01-21 Seagate Technology, Llc Transducing head and method for forming a recessed shield for a transducing head
JP3468419B2 (ja) * 2000-03-17 2003-11-17 Ｔｄｋ株式会社 トンネル磁気抵抗効果素子、薄膜磁気ヘッド、磁気ヘッド装置及び磁気ディスク装置
US6519124B1 (en) * 2000-03-27 2003-02-11 Tdk Corporation Magnetic tunnel junction read head using a hybrid, low-magnetization flux guide
US6785100B2 (en) * 2000-04-10 2004-08-31 Matsushita Electric Industrial Co., Ltd. Magnetic head comprising a multilayer magnetoresistive device and a yoke for introducing magnetic flux from a medium to the magnetoresistive device
US6504689B1 (en) * 2000-07-12 2003-01-07 International Business Machines Corporation Tunnel junction read head with flux guide coupled to and magnetically extending a recessed free layer to an air bearing surface
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
US6680827B2 (en) * 2000-08-07 2004-01-20 Tdk Corporation Dual spin valve CPP MR with flux guide between free layers thereof
US6542343B1 (en) 2000-08-09 2003-04-01 International Business Machines Corporation Tunnel valve head design to lower resistance
US6809900B2 (en) * 2001-01-25 2004-10-26 Seagate Technology Llc Write head with magnetization controlled by spin-polarized electron current
US6661626B2 (en) 2001-03-20 2003-12-09 International Business Machines Corporation Tunnel valve sensor having a pinned layer structure with an iron oxide (Fe3O4) layer
US6597546B2 (en) 2001-04-19 2003-07-22 International Business Machines Corporation Tunnel junction sensor with an antiferromagnetic (AFM) coupled flux guide
US6833982B2 (en) 2001-05-03 2004-12-21 Hitachi Global Storage Technologies Netherlands B.V. Magnetic tunnel junction sensor with a free layer biased by longitudinal layers interfacing top surfaces of free layer extensions which extend beyond an active region of the sensor
US6721139B2 (en) 2001-05-31 2004-04-13 International Business Machines Corporation Tunnel valve sensor with narrow gap flux guide employing a lamination of FeN and NiFeMo
US6724587B2 (en) 2001-06-11 2004-04-20 International Business Machines Corporation Low temperature yoke type tunnel valve sensor
US7057864B2 (en) * 2001-07-10 2006-06-06 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for achieving physical connection between the flux guide and the free layer and that insulates the flux guide from the shields
WO2003010758A1 (en) * 2001-07-24 2003-02-06 Seagate Technology Llc Write head for high anisotropy media
US6657825B2 (en) * 2001-08-02 2003-12-02 International Business Machines Corporation Self aligned magnetoresistive flux guide read head with exchange bias underneath free layer
US6756648B2 (en) * 2002-03-25 2004-06-29 International Business Machines Corporation System and method for stabilizing a magnetic tunnel junction sensor
JP2004087024A (ja) * 2002-08-28 2004-03-18 Shinka Jitsugyo Kk 薄膜磁気ヘッド
JP4065787B2 (ja) * 2002-08-30 2008-03-26 株式会社日立グローバルストレージテクノロジーズ 磁気ヘッドおよび磁気記録再生装置
US20080043376A1 (en) * 2002-09-13 2008-02-21 Hitachi, Ltd. Magnetic resistive head and magnetic recording apparatus
JP4564706B2 (ja) * 2002-09-13 2010-10-20 株式会社日立グローバルストレージテクノロジーズ 磁気抵抗効果磁気ヘッド及び磁気記録装置
US6943997B2 (en) * 2003-09-09 2005-09-13 Hitachi Global Storage Technologies Netherlands B.V. Sensor with improved stabilization and track definition
US7652855B2 (en) * 2006-11-09 2010-01-26 Hitachi Global Storage Technologies Netherlands B.V. Magnetic sensor with extended free layer and overlaid leads
US7935435B2 (en) * 2008-08-08 2011-05-03 Seagate Technology Llc Magnetic memory cell construction
US8390283B2 (en) 2009-09-25 2013-03-05 Everspin Technologies, Inc. Three axis magnetic field sensor
US8518734B2 (en) 2010-03-31 2013-08-27 Everspin Technologies, Inc. Process integration of a single chip three axis magnetic field sensor

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69407158T2 (de) * 1993-10-06 1998-05-28 Koninkl Philips Electronics Nv Magnetoresistive anordnung und diese verwendender magnetkopf
EP0731969B1 (en) * 1994-10-05 1999-12-01 Koninklijke Philips Electronics N.V. Magnetic multilayer device including a resonant-tunneling double-barrier structure
US5493467A (en) * 1994-12-27 1996-02-20 International Business Machines Corporation Yoke spin valve MR read head
US5629922A (en) * 1995-02-22 1997-05-13 Massachusetts Institute Of Technology Electron tunneling device using ferromagnetic thin films
JP3217703B2 (ja) * 1995-09-01 2001-10-15 株式会社東芝 磁性体デバイス及びそれを用いた磁気センサ
US5695864A (en) * 1995-09-28 1997-12-09 International Business Machines Corporation Electronic device using magnetic components
US5627704A (en) * 1996-02-12 1997-05-06 Read-Rite Corporation Thin film giant magnetoresistive CPP transducer with flux guide yoke structure
EP0789250A3 (en) * 1996-02-12 1997-10-01 Read Rite Corp Giant magnetoresistive thin film transducer with a flow guide structure
US5696656A (en) * 1996-09-06 1997-12-09 International Business Machines Corporation Highly sensitive orthogonal spin valve read head
US5757056A (en) * 1996-11-12 1998-05-26 University Of Delaware Multiple magnetic tunnel structures
US5801984A (en) * 1996-11-27 1998-09-01 International Business Machines Corporation Magnetic tunnel junction device with ferromagnetic multilayer having fixed magnetic moment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6552882B1 (en) 1998-09-01 2003-04-22 Nec Corporation Information reproduction head apparatus and information recording/reproduction system
US6930862B2 (en) * 2002-01-07 2005-08-16 Hitachi Global Storage Technologies Netherlands B.V. Shielded extraordinary magnetoresistance head
US7161773B2 (en) * 2002-01-18 2007-01-09 Hitachi Global Storage Technologies Netherlands B.V. High linear density tunnel junction flux guide read head with in-stack longitudinal bias stack (LBS)
JP2007158369A (ja) * 2002-11-01 2007-06-21 Nec Corp 磁気抵抗デバイス及びその製造方法
US7742263B2 (en) 2002-11-01 2010-06-22 Nec Corporation Magnetoresistance device with a diffusion barrier between a conductor and a magnetoresistance element and method of fabricating the same
US20110085261A1 (en) * 2009-10-14 2011-04-14 Hitachi Global Storage Technologies Netherlands B.V. Magnetoresistive magnetic head having a non-magnetic part on a medium facing surface side of the sensor
US8514526B2 (en) * 2009-10-14 2013-08-20 HGST Netherlands B.V. Magnetoresistive magnetic head having a non-magnetic part on a medium facing surface side of the sensor

Also Published As

Publication number Publication date
DE69830555T2 (de) 2006-05-04
EP0918319A1 (en) 1999-05-26
EP0918319B1 (en) 2005-06-15
US5930087A (en) 1999-07-27
DE69830555D1 (de) 2005-07-21

Similar Documents

Publication Publication Date Title
JPH11316916A (ja) 近接触動作用頑強記録ヘッド
US5739990A (en) Spin-valve GMR sensor with inbound exchange stabilization
US6456465B1 (en) Vertical giant magnetoresistance sensor using a recessed shield
KR100295289B1 (ko) 후방자속가이드로서의감지층을갖는자기터널접합부자기저항판독헤드
US8027129B2 (en) Current perpendicular to plane magnetoresistive sensor pre-product with current confining path precursor
KR100623812B1 (ko) 자기저항 기록 헤드에서의 센서 온도 감소
JPH07272225A (ja) 磁気抵抗性ヘッド
CN101894568A (zh) 自旋累积磁传感器的三端设计
US20080102316A1 (en) Magneto-resistive magnetic read head and storage apparatus using the same magnetic read head
US6191925B1 (en) Dual element read with shaped elements
US7170723B2 (en) Magnetic disk apparatus using magnetic head having magnetoresistive film
US7349186B2 (en) Magnetic read head
US6452759B2 (en) Yoke-type magnetoresistive (MR) head, yoke-type MR composite thin film head, and magnetic storage apparatus
EP0573155B1 (en) Magnetoresistive transducer conductor configuration
US5894384A (en) Magnetoresistance effect head in which a magnetoresistance effect element and a soft magnetic film form a single magnetic circuit
US20040264034A1 (en) Magnetic head and a magnetic disk drive
JPH07176019A (ja) 扁形磁気抵抗ヘッド
JP2004259330A (ja) 磁気ヘッド
JPH11259824A (ja) 磁気記録再生装置及びそれに用いる磁気抵抗効果型磁気ヘッド
US6317302B1 (en) Thin-film magnetic read head with locally reduced exchange coupling
US20070127162A1 (en) Magnetic head device provided with lead electrode electrically connected to upper shield layer and lower shield layer
US6980402B2 (en) Magnetic head
JP2004295953A (ja) 磁気ヘッド
US7684159B2 (en) Magnetic head device provided with lead electrode electrically connected to upper shield layer and lower shield layer
JP3756593B2 (ja) 磁気抵抗効果型磁気ヘッド

Legal Events

Date Code Title Description
RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20050609

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20050614

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20051109

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20051109

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20061218

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070109

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20070605