DE68927414T2 - Schreib- und Lesekopf mit Seitenabschirmung - Google Patents

Schreib- und Lesekopf mit Seitenabschirmung

Info

Publication number
DE68927414T2
DE68927414T2 DE68927414T DE68927414T DE68927414T2 DE 68927414 T2 DE68927414 T2 DE 68927414T2 DE 68927414 T DE68927414 T DE 68927414T DE 68927414 T DE68927414 T DE 68927414T DE 68927414 T2 DE68927414 T2 DE 68927414T2
Authority
DE
Germany
Prior art keywords
read
write head
side shielding
shielding
write
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.)
Expired - Fee Related
Application number
DE68927414T
Other languages
English (en)
Other versions
DE68927414D1 (de
Inventor
Shyam C Das
Michael L Mallary
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.)
Quantum Corp
Original Assignee
Quantum Corp
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 Quantum Corp filed Critical Quantum Corp
Publication of DE68927414D1 publication Critical patent/DE68927414D1/de
Application granted granted Critical
Publication of DE68927414T2 publication Critical patent/DE68927414T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B5/31—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
    • G11B5/315—Shield layers on both sides of the main pole, e.g. in perpendicular magnetic heads
    • 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
    • G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
    • 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
    • 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
    • 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
    • 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
    • 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
    • G11B5/3916—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
    • G11B5/3922—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 the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure
    • G11B5/3925—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 the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure the two parts being 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
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3945—Heads comprising more than one sensitive element
    • G11B5/3948—Heads comprising more than one sensitive element the sensitive elements being active read-out elements
    • G11B5/3951—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes
    • G11B5/3954—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes the active elements transducing on a single 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
    • G11B5/33—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
    • G11B5/398—Specially shaped 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
    • 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09—Digital recording
DE68927414T 1988-03-16 1989-03-02 Schreib- und Lesekopf mit Seitenabschirmung Expired - Fee Related DE68927414T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/168,978 US4935832A (en) 1987-04-01 1988-03-16 Recording heads with side shields

Publications (2)

Publication Number Publication Date
DE68927414D1 DE68927414D1 (de) 1996-12-12
DE68927414T2 true DE68927414T2 (de) 1997-04-30

Family

ID=22613779

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68927414T Expired - Fee Related DE68927414T2 (de) 1988-03-16 1989-03-02 Schreib- und Lesekopf mit Seitenabschirmung

Country Status (4)

Country Link
US (1) US4935832A (de)
EP (1) EP0333347B1 (de)
JP (1) JPH0214410A (de)
DE (1) DE68927414T2 (de)

Families Citing this family (67)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5081554A (en) * 1987-04-01 1992-01-14 Digital Equipment Corporation Biasing conductor for MR head
US5159511A (en) * 1987-04-01 1992-10-27 Digital Equipment Corporation Biasing conductor for MR head
US5111352A (en) * 1987-07-29 1992-05-05 Digital Equipment Corporation Three-pole magnetic head with reduced flux leakage
US5075956A (en) * 1988-03-16 1991-12-31 Digital Equipment Corporation Method of making recording heads with side shields
US5068959A (en) * 1988-07-11 1991-12-03 Digital Equipment Corporation Method of manufacturing a thin film head
DE3824045C2 (de) * 1988-07-15 1994-04-07 Broadcast Television Syst Magnetkopfanordnung für ein Magnetbandgerät
CA1323695C (en) * 1988-12-30 1993-10-26 Shyam Chandra Das Recording heads with side shields
US5097372A (en) * 1989-08-04 1992-03-17 Matsushita Electric Industrial Co., Ltd. Thin film magnetic head with wide recording area and narrow reproducing area
JP2563597B2 (ja) * 1989-08-04 1996-12-11 松下電器産業株式会社 複合型薄膜磁気ヘッド
US5315469A (en) * 1991-07-25 1994-05-24 Applied Magnetics Corporation Magnetic recording head which produces variable erase bands
US5331496A (en) * 1992-02-14 1994-07-19 Digital Equipment Corporation Thin-film magnetic transducer with a multitude of magnetic flux interactions
JP2768372B2 (ja) * 1992-04-20 1998-06-25 日本電気株式会社 複合型薄膜磁気ヘッド
US5945007A (en) * 1992-10-20 1999-08-31 Cohen; Uri Method for etching gap-vias in a magnetic thin film head and product
US5673163A (en) * 1992-10-20 1997-09-30 Cohen; Uri Pinched-gap magnetic recording thin film head
US5621595A (en) * 1992-10-20 1997-04-15 Cohen; Uri Pinched-gap magnetic recording thin film head
US5452166A (en) * 1993-10-01 1995-09-19 Applied Magnetics Corporation Thin film magnetic recording head for minimizing undershoots and a method for manufacturing the same
US5495379A (en) * 1994-07-07 1996-02-27 Maxtor Corporation Erase bands for vertical recording
FR2723242B1 (fr) * 1994-07-26 1996-08-30 Thomson Csf Tete magnetique a element saturable et dispositif matriciel comportant un ensemble de tetes magnetiques
US5761009A (en) * 1995-06-07 1998-06-02 International Business Machines Corporation Having parastic shield for electrostatic discharge protection
US5790341A (en) * 1995-09-20 1998-08-04 International Business Machines Corporation Method and apparatus for reducing servo interference in a magneto-resistive head using skew between head and servo pattern
US5923502A (en) * 1995-12-21 1999-07-13 International Business Machines Corporation Magneto-resistive head including a selectively placed low-reluctance path between shields
US6031695A (en) * 1997-09-05 2000-02-29 International Business Machines Corporation Combined read head and write head with non-magnetic electrically conductive layer on upper pole tip thereof
US6055138A (en) * 1998-05-06 2000-04-25 Read-Rite Corporation Thin film pedestal pole tips write head having narrower lower pedestal pole tip
US6430010B1 (en) 1999-05-03 2002-08-06 Seagate Technology, Llc. Disc drive reader with reduced off-track pickup
US6707642B1 (en) * 2000-02-04 2004-03-16 Seagate Technology Llc Longitudinal magnetic recording head with reduced side fringing
US6466419B1 (en) * 2000-03-31 2002-10-15 Seagate Technology Llc Current perpendicular to plane spin valve head
KR100370403B1 (ko) 2000-11-24 2003-01-29 삼성전자 주식회사 수직자기기록 방식의 자기헤드
US6738233B2 (en) * 2000-12-20 2004-05-18 Seagate Technology Llc Perpendicular magnetic recording head with a magnetic shield to reduce side reading
US6954340B2 (en) * 2001-05-23 2005-10-11 Seagate Technology Llc Perpendicular magnetic recording head with nonmagnetic write gap greater than twice side shield gap distance
US6721129B2 (en) * 2001-07-27 2004-04-13 International Business Machines Corporation Low frequency attenuator in a magnetic write head
US6930862B2 (en) * 2002-01-07 2005-08-16 Hitachi Global Storage Technologies Netherlands B.V. Shielded extraordinary magnetoresistance head
JP3865308B2 (ja) * 2002-10-02 2007-01-10 Ｔｄｋ株式会社 薄膜磁気ヘッド、磁気ヘッド装置及び磁気記録再生装置
US7324309B1 (en) 2003-03-06 2008-01-29 Maxtor Corporation Cross-track shielding in a GMR head
US7106554B2 (en) * 2003-04-10 2006-09-12 Headway Technologies, Inc. Perpendicular magnetic writer with magnetic potential control shield
US7031121B2 (en) * 2003-07-30 2006-04-18 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular recording magnetic head with a write shield magnetically coupled to a first pole piece
US7002775B2 (en) * 2003-09-30 2006-02-21 Hitachi Global Storage Technologies Netherlands B.V. Head for perpendicular magnetic recording with a shield structure connected to the return pole piece
US7042682B2 (en) * 2003-10-17 2006-05-09 Headway Technologies, Inc. Fully shielded perpendicular recoding writer
US7322095B2 (en) * 2004-04-21 2008-01-29 Headway Technologies, Inc. Process of manufacturing a four-sided shield structure for a perpendicular write head
US7212367B2 (en) * 2004-06-16 2007-05-01 Seagate Technology Llc Ampere wire write head with confined magnetic fields
US7070698B2 (en) * 2004-06-30 2006-07-04 Hitachi Global Storage Technologies Netherlands B.V. Methods of fabricating magnetic write heads with side and trailing shield structures
US7298586B1 (en) * 2004-09-07 2007-11-20 Storage Technology Corporation Thin-film read element with multiple read sensors
JP4286208B2 (ja) * 2004-10-20 2009-06-24 ヒタチグローバルストレージテクノロジーズネザーランドビーブイ 垂直記録用磁気ヘッドとその製造方法及びそれを用いた磁気ディスク装置
US7295401B2 (en) * 2004-10-27 2007-11-13 Hitachi Global Storage Technologies Netherlands B.V. Laminated side shield for perpendicular write head for improved performance
JP2006164356A (ja) * 2004-12-03 2006-06-22 Hitachi Global Storage Technologies Netherlands Bv 磁気ヘッド及び磁気記録再生装置
US7903372B2 (en) * 2005-01-11 2011-03-08 Samsung Electronics Co., Ltd. Magnetic recording head and method of manufacturing the same
KR100682914B1 (ko) * 2005-01-11 2007-02-15 삼성전자주식회사 자기 기록헤드 및 그 제조 방법
JP2006209927A (ja) * 2005-01-31 2006-08-10 Toshiba Corp 垂直磁気ヘッドおよび垂直磁気ディスク装置
US7397633B2 (en) * 2005-03-01 2008-07-08 Seagate Technology, Llc Writer structure with assisted bias
JP2006252697A (ja) * 2005-03-11 2006-09-21 Tdk Corp 垂直磁気記録素子、薄膜磁気ヘッド、磁気ヘッド装置及び磁気記録再生装置
US7639450B2 (en) * 2005-04-27 2009-12-29 Hitachi Global Storage Technologies Netherlands B.V. Flux shunt structure for reducing return pole corner fields in a perpendicular magnetic recording head
US7573683B1 (en) 2005-07-08 2009-08-11 Maxtor Corporation Write heads with floating side shields and manufacturing methods
KR100763904B1 (ko) * 2005-08-12 2007-10-05 삼성전자주식회사 수직 자기 헤드 및 그 제조 방법
US7367112B2 (en) * 2006-02-14 2008-05-06 Hitachi Global Storage Technologies Netherlands B.V. Method of fabricating a head for perpendicular magnetic recording with a self-aligning side shield structure
US7889458B2 (en) * 2006-11-13 2011-02-15 Hitachi Global Storage Technologies Netherlands B.V. Write head with self-cross biased pole for high speed magnetic recording
US8035930B2 (en) * 2007-10-03 2011-10-11 Headway Technologies, Inc. Perpendicular magnetic recording write head with a side shield
US8000059B2 (en) * 2007-12-12 2011-08-16 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic write head with a thin wrap around magnetic shield
US8000064B2 (en) * 2007-12-13 2011-08-16 Tdk Corporation Thin-film magnetic head for perpendicular magnetic recording and method of making the same
US20100110585A1 (en) * 2008-11-03 2010-05-06 Headway Technologies, Inc. Perpendicular magnetic recording write head with a trailing shield
US8842389B2 (en) * 2009-10-26 2014-09-23 Headway Technologies, Inc. Wrap-around shielded writer with highly homogeneous shield material
US8385018B2 (en) 2009-11-03 2013-02-26 International Business Machines Corporation Magnetic writer having multiple gaps with more uniform magnetic fields across the gaps
US8289647B2 (en) * 2010-02-23 2012-10-16 Seagate Technology Llc Magnetic recording head with notched shield
US8451562B2 (en) * 2010-04-23 2013-05-28 HGST Netherlands B.V. Method for manufacturing a magnetic write head having a wrap around trailing magnetic shield with a tapered side gap
US8537496B2 (en) 2010-07-27 2013-09-17 HGST Netherlands B.V. Perpendicular magnetic write head having a trailing wrap-around magnetic shield magnetically biased in a cross track direction
US8780508B2 (en) 2012-06-29 2014-07-15 Seagate Technology Llc Magnetic element with biased side shield lamination
US9030786B2 (en) 2013-07-23 2015-05-12 HGST Netherlands B.V. Magnetic head having a soft magnetic layer with a close-packed plane thereof being parallel or oblique to an air bearing surface
US9355656B1 (en) 2015-03-11 2016-05-31 International Business Machines Corporation Dual purpose tape write transducer
US9837107B2 (en) * 2016-02-12 2017-12-05 International Business Machines Corporation Tape head with electrically conducting surface to reduce triboelectric charging

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3355727A (en) * 1963-07-24 1967-11-28 Donald C Gaubatz Shield utilized as flux path for magnetic head
US3700828A (en) * 1971-10-07 1972-10-24 Hamilton Digital Controls Inc Magnetic head assembly with low read to write crosstalk
US3921217A (en) * 1971-12-27 1975-11-18 Ibm Three-legged magnetic recording head using a magnetorestive element
US4071868A (en) * 1974-12-20 1978-01-31 Matsushita Electric Industrial Co., Ltd. Narrow track MR head with side shields
JPS52138915A (en) * 1976-05-14 1977-11-19 Fujitsu Ltd Magnetic head
JPS5622206A (en) * 1979-07-30 1981-03-02 Fujitsu Ltd Thin-film magnetic head
FR2480014A1 (fr) * 1980-04-02 1981-10-09 Cii Honeywell Bull Transducteur magnetique de lecture et/ou d'enregistrement d'informations contenues sur un support magnetique
FR2480015A1 (fr) * 1980-04-02 1981-10-09 Cii Honeywell Bull Transducteur magnetique a entrefer de grande dimension variable pour la lecture et l'ecriture des informations contenues dans un support magnetique
JPS5737712A (en) * 1980-08-18 1982-03-02 Fujitsu Ltd Vertical magnetization recording head
IT1129437B (it) * 1980-12-16 1986-06-04 Olivetti & Co Spa Testina magnetica
US4745509A (en) * 1981-08-21 1988-05-17 Matsushita Electric Industrial Company, Limited Magnetic head with improved supporter for perpendicular magnetization recording
JPS5848217A (ja) * 1981-09-17 1983-03-22 Y Ii Data:Kk 磁気ヘツド
JPS58111114A (ja) * 1981-12-23 1983-07-02 Fujitsu Ltd 薄膜磁気ヘツド
JPS5954070A (ja) * 1982-09-21 1984-03-28 Fujitsu Ltd 磁気ヘツド支持装置
US4566050A (en) * 1982-12-30 1986-01-21 International Business Machines Corp. (Ibm) Skew insensitive magnetic read head
JPS59142719A (ja) * 1983-02-03 1984-08-16 Fujitsu Ltd 薄膜ヘツド
US4672494A (en) * 1983-09-01 1987-06-09 Matsushita Electric Industrial Co., Ltd. Magnetic head for effecting perpendicular magnetic recording
DE3424651A1 (de) * 1983-11-04 1985-05-15 Control Data Corp., Minneapolis, Minn. Magnetwandlerkopf
US4651243A (en) * 1984-04-27 1987-03-17 Magnetic Information Technology, Inc. Suspension for magnetic transducer
JPS61133002A (ja) * 1984-12-03 1986-06-20 Olympus Optical Co Ltd 垂直磁気ヘツド
JPS62129909A (ja) * 1985-10-31 1987-06-12 Olympus Optical Co Ltd 垂直磁気ヘツド
US4656546A (en) * 1985-01-22 1987-04-07 Digital Equipment Corporation Vertical magnetic recording arrangement
JPS6224412A (ja) * 1985-07-25 1987-02-02 Sony Corp 単磁極型磁気ヘツド装置
JPS6289206A (ja) * 1985-10-16 1987-04-23 Nec Corp 磁気ヘツド
US4758917A (en) * 1986-04-11 1988-07-19 Ampex Corporation Magnetic transducer assembly with improved crosstalk reduction
DE3622683C2 (de) * 1986-07-05 1996-11-14 Philips Broadcast Television S Einrichtung zur Unterdrückung des magnetischen Übersprechens
JPS63153707A (ja) * 1986-12-17 1988-06-27 Nec Corp 薄膜磁気ヘツド
JPS63231715A (ja) * 1987-03-20 1988-09-27 Hitachi Ltd 薄膜磁気ヘツド
EP0308483B1 (de) * 1987-04-01 1994-12-28 Digital Equipment Corporation Magnetoresistiver dünnfilmkopf für digitale magnetische speichervorrichtung
US4907113A (en) * 1987-07-29 1990-03-06 Digital Equipment Corporation Three-pole magnetic recording head

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EP0333347A2 (de) 1989-09-20
JPH0214410A (ja) 1990-01-18
DE68927414D1 (de) 1996-12-12
US4935832A (en) 1990-06-19
EP0333347B1 (de) 1996-11-06
EP0333347A3 (de) 1992-03-18

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