FR2321169A1 - Tetes de lecture magnetoresistives pour operations d'asservissement - Google Patents

Tetes de lecture magnetoresistives pour operations d'asservissement

Info

Publication number
FR2321169A1
FR2321169A1 FR7620691A FR7620691A FR2321169A1 FR 2321169 A1 FR2321169 A1 FR 2321169A1 FR 7620691 A FR7620691 A FR 7620691A FR 7620691 A FR7620691 A FR 7620691A FR 2321169 A1 FR2321169 A1 FR 2321169A1
Authority
FR
France
Prior art keywords
reading heads
magnetoresistive reading
slaughter operations
slaughter
operations
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.)
Granted
Application number
FR7620691A
Other languages
English (en)
French (fr)
Other versions
FR2321169B1 (Direct
Inventor
Charles Ch Lin
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2321169A1 publication Critical patent/FR2321169A1/fr
Application granted granted Critical
Publication of FR2321169B1 publication Critical patent/FR2321169B1/fr
Granted 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
    • 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
    • G11B5/399—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 with intrinsic biasing, e.g. provided by equipotential strips
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Measuring Magnetic Variables (AREA)
FR7620691A 1975-08-14 1976-07-01 Tetes de lecture magnetoresistives pour operations d'asservissement Granted FR2321169A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/604,693 US4012781A (en) 1975-08-14 1975-08-14 Magnetoresistive read head assembly for servo operation

Publications (2)

Publication Number Publication Date
FR2321169A1 true FR2321169A1 (fr) 1977-03-11
FR2321169B1 FR2321169B1 (Direct) 1978-05-05

Family

ID=24420635

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7620691A Granted FR2321169A1 (fr) 1975-08-14 1976-07-01 Tetes de lecture magnetoresistives pour operations d'asservissement

Country Status (7)

Country Link
US (1) US4012781A (Direct)
JP (1) JPS5223925A (Direct)
CA (1) CA1068401A (Direct)
DE (1) DE2632371A1 (Direct)
FR (1) FR2321169A1 (Direct)
GB (2) GB1539174A (Direct)
IT (1) IT1063687B (Direct)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2511535A1 (fr) * 1981-08-17 1983-02-18 Sony Corp Tete de transducteur magnetique
EP0091739A1 (en) * 1982-04-13 1983-10-19 Minnesota Mining And Manufacturing Company Integrated magnetostrictive-piezoelectric metal oxide semiconductor magnetic playback head
EP0440386A3 (en) * 1990-01-29 1993-04-14 International Business Machines Corporation Magnetic head and process for manufacturing same
EP0573148A3 (en) * 1992-06-05 1994-06-15 Hewlett Packard Co Conductor configuration for magnetoresistive transducers

Families Citing this family (64)

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JPS52137371A (en) * 1976-05-13 1977-11-16 Fujitsu Ltd Position control system
JPS54157610A (en) * 1978-05-26 1979-12-12 Sony Corp Magnetic head
US4447839A (en) * 1980-10-28 1984-05-08 Compagnie Internationale Pour L'informatique Cii-Honeywell Bull (Societe Anonyme) Magnetoresistant transducer
US4533872A (en) * 1982-06-14 1985-08-06 Honeywell Inc. Magnetic field sensor element capable of measuring magnetic field components in two directions
US4589041A (en) * 1982-08-30 1986-05-13 International Business Machines Corporation Differential magnetoresistive sensor for vertical recording
US4581663A (en) * 1982-11-02 1986-04-08 Nec Corporation Buried servo recording system having dual transducers
JPS59112422A (ja) * 1982-12-16 1984-06-28 Sony Corp 磁気抵抗効果型磁気ヘツド
US4535375A (en) * 1983-01-14 1985-08-13 Magnetic Peripherals, Inc. Magnetoresistive head
US4599668A (en) * 1983-06-15 1986-07-08 Eastman Kodak Company Inductively-coupled, thin-film M-R head
DE3613619A1 (de) * 1985-04-26 1986-10-30 Sharp K.K., Osaka Duennfilm-magnetkopf
JPS62205511A (ja) * 1986-03-05 1987-09-10 Fuji Photo Film Co Ltd 磁気ヘツド特性測定装置
US4972286A (en) * 1989-03-03 1990-11-20 Seagate Technology, Inc. Grounding pole structures in thin film mganetic heads
US5048175A (en) * 1989-03-03 1991-09-17 Seagate Technology, Inc. Method for grounding pole structures in thin film magnetic heads
US5216560A (en) * 1989-11-22 1993-06-01 Hewlett-Packard Company Stabilization of magnetoresistive sensors using the longitudinal field produced by the current in the contact leads
US5083112A (en) * 1990-06-01 1992-01-21 Minnesota Mining And Manufacturing Company Multi-layer thin-film eas marker
US5390061A (en) 1990-06-08 1995-02-14 Hitachi, Ltd. Multilayer magnetoresistance effect-type magnetic head
US5555142A (en) * 1990-09-27 1996-09-10 Kabushiki Kaisha Toshiba Magnetic disk system
DE69126082T2 (de) * 1990-09-27 1997-10-02 Toshiba Kawasaki Kk Magnetischer Kopf
JPH04178876A (ja) * 1990-11-14 1992-06-25 Hitachi Ltd パーソナル情報表示システム
US5079831A (en) * 1991-02-07 1992-01-14 Applied Magnetics Corporation Method of making a dual stripe magnetic head
US5260652A (en) * 1992-03-25 1993-11-09 Seagate Technology, Inc. Magnetoresistive sensor with electrical contacts having variable resistive regions for enhanced sensor sensitivity
US5302461A (en) * 1992-06-05 1994-04-12 Hewlett-Packard Company Dielectric films for use in magnetoresistive transducers
US5309304A (en) * 1992-06-05 1994-05-03 Hewlett-Packard Company Magnetoresistive transducer conductor configuration
DE69331895T2 (de) * 1992-12-29 2002-12-19 Eastman Kodak Co., Rochester Magnetoresistiver Magnetfeldsensor mit sehr langem Wirkbereich
US5508868A (en) * 1993-01-25 1996-04-16 Read-Rite Corporation Dual element magnetoresistive sensing head having in-gap flux guide and flux closure piece with particular connection of magnetoresistive sensing elements to differential amplifier
JPH06259714A (ja) * 1993-03-09 1994-09-16 Hitachi Ltd 磁気ディスク装置
US5440233A (en) * 1993-04-30 1995-08-08 International Business Machines Corporation Atomic layered materials and temperature control for giant magnetoresistive sensor
US5388014A (en) * 1993-09-10 1995-02-07 Hewlett-Packard Company Apparatus and method of sensing the position of a magnetic head
US5436773A (en) * 1994-06-10 1995-07-25 International Business Machines Corporation Enhanced linearity range for magneto resistive transducer servo by changing the direction of the bias current
US5781365A (en) * 1995-03-07 1998-07-14 Cirrus Logic, Inc. Sliding mode control of a magnetoresistive read head for magnetic recording
DE69616676T2 (de) * 1995-07-18 2002-05-16 Hewlett-Packard Co.(A Delaware Corporation), Palo Alto Magnetoresistiver Aufnahmekopf
KR100274522B1 (ko) * 1996-03-14 2001-01-15 니시무로 타이죠 멀티자기헤드및이것을구비한자기디스크장치
US5953173A (en) * 1996-09-17 1999-09-14 International Business Machines Corporation High CMRR and sensor-disk short-circuit protection device for dual element magnetoresistive heads
US5783460A (en) * 1996-10-25 1998-07-21 Headway Technologies, Inc. Method of making self-aligned dual stripe magnetoresistive (DRMR) head for high density recording
US6104562A (en) * 1997-04-03 2000-08-15 International Business Machines Corporation Multiple element transducer for magnetic recording
US6002554A (en) * 1997-10-03 1999-12-14 Storage Technology Corporation Multitrack coupled element read head with support structure to eliminate shorting and method for manufacturing same
US6157510A (en) * 1998-03-10 2000-12-05 Maxtor Corporation Magnetic storage device with multiple read elements which are offset laterally and longitudinally
US6266205B1 (en) 1998-03-10 2001-07-24 Maxtor Corporation Parallel servo with ultra high bandwidth off-track detection
WO1999059145A1 (en) * 1998-05-13 1999-11-18 Storage Technology Corporation Method for reading both high and low density signals with an mr head
US6606216B1 (en) 1999-05-05 2003-08-12 Maxtor Corporation Transducer head with separate data and servo read elements
US7564656B2 (en) * 2005-02-28 2009-07-21 Hitachi Global Storage Technologies Netherlands B.V. Integrated servo and read EMR sensor
EP2052245A2 (en) * 2006-08-09 2009-04-29 Koninklijke Philips Electronics N.V. Magnetic sensor device on a microchip
JP4985522B2 (ja) * 2008-03-28 2012-07-25 Ｔｄｋ株式会社 磁界測定方法及び磁気センサ
US8139301B1 (en) 2009-07-22 2012-03-20 Western Digital (Fremont), Llc Disk drive comprising a dual read element and delay circuitry to improve read signal
US8427144B2 (en) * 2009-07-28 2013-04-23 Tdk Corporation Magnetic sensor that includes magenetoresistive films and conductors that combine the magnetoresistive films
US8698490B2 (en) * 2010-12-15 2014-04-15 Infineon Technologies Ag Magnetoresistive angle sensors having conductors arranged in multiple planes
DE102011109838A1 (de) 2011-05-27 2012-11-29 J-Plasma Gmbh Lichtleitfaser
US9431039B1 (en) 2013-05-21 2016-08-30 Western Digital (Fremont), Llc Multiple sensor array usable in two-dimensional magnetic recording
US8891207B1 (en) 2013-06-07 2014-11-18 Western Digital (Fremont), Llc Connection schemes for a multiple sensor array usable in two-dimensional magnetic recording
US9626992B2 (en) * 2013-06-26 2017-04-18 Marvell International Ltd. Read assembly, data storage system, and methods of using the same
US8908333B1 (en) 2013-08-13 2014-12-09 Western Digital (Fremont), Llc Shield designed for middle shields in a multiple sensor array
US9431032B1 (en) 2013-08-14 2016-08-30 Western Digital (Fremont), Llc Electrical connection arrangement for a multiple sensor array usable in two-dimensional magnetic recording
US9135935B1 (en) 2013-10-11 2015-09-15 Western Digital Technologies, Inc. Customized head gimbal assembly bonding skew angle for adjusting two-dimensional magnetic recording reader alignment
US9042058B1 (en) 2013-10-17 2015-05-26 Western Digital Technologies, Inc. Shield designed for middle shields in a multiple sensor array
US9257145B1 (en) 2013-11-27 2016-02-09 Western Digital Technologies, Inc. Disk drive measuring down-track spacing of read sensors
US8988812B1 (en) 2013-11-27 2015-03-24 Western Digital (Fremont), Llc Multi-sensor array configuration for a two-dimensional magnetic recording (TDMR) operation
US8970988B1 (en) 2013-12-31 2015-03-03 Western Digital (Fremont), Llc Electric gaps and method for making electric gaps for multiple sensor arrays
US9245556B2 (en) 2014-03-10 2016-01-26 Western Digital Technologies, Inc. Disk drive employing multiple read elements to increase radial band for two-dimensional magnetic recording
US9070406B1 (en) 2014-03-10 2015-06-30 Western Digital Technologies, Inc. Disk drive configuring one-dimensional and two-dimensional recording areas based on read element spacing
US9053727B1 (en) 2014-06-02 2015-06-09 Western Digital Technologies, Inc. Disk drive opening spiral crossing window based on DC and AC spiral track error
US9013824B1 (en) 2014-06-04 2015-04-21 Western Digital Technologies, Inc. Data storage device comprising dual read sensors and dual servo channels to improve servo demodulation
US9087527B1 (en) 2014-10-28 2015-07-21 Western Digital (Fremont), Llc Apparatus and method for middle shield connection in magnetic recording transducers
US9786301B1 (en) 2014-12-02 2017-10-10 Western Digital (Fremont), Llc Apparatuses and methods for providing thin shields in a multiple sensor array
US11276423B1 (en) 2020-07-02 2022-03-15 Seagate Technology Llc Reader with a compensating layer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1165087B (de) * 1961-08-08 1964-03-12 Wolfgang Bogen Magnetkopf
DE2430612A1 (de) * 1973-07-10 1975-01-30 Philips Nv Vorrichtung zur steuerung der lage eines magnetkopfes in bezug auf eine zu folgende datenspur
US3864751A (en) * 1973-10-04 1975-02-04 Ibm Induced bias magnetoresistive read transducer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3493694A (en) * 1966-01-19 1970-02-03 Ampex Magnetoresistive head
FR2219482B1 (Direct) * 1973-02-27 1978-03-03 Cii
US3860965A (en) * 1973-10-04 1975-01-14 Ibm Magnetoresistive read head assembly having matched elements for common mode rejection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1165087B (de) * 1961-08-08 1964-03-12 Wolfgang Bogen Magnetkopf
DE2430612A1 (de) * 1973-07-10 1975-01-30 Philips Nv Vorrichtung zur steuerung der lage eines magnetkopfes in bezug auf eine zu folgende datenspur
US3864751A (en) * 1973-10-04 1975-02-04 Ibm Induced bias magnetoresistive read transducer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
REVUE US IBM TECHNICAL DISCLOSURE BULLETIN, VOL. 17, NO. 4, SEPTEMBRE 1974, PAGES 979-980, ARTICLE "MULTIELEMENT SERVOING HEAD" MCCORMICK ) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2511535A1 (fr) * 1981-08-17 1983-02-18 Sony Corp Tete de transducteur magnetique
EP0091739A1 (en) * 1982-04-13 1983-10-19 Minnesota Mining And Manufacturing Company Integrated magnetostrictive-piezoelectric metal oxide semiconductor magnetic playback head
US4520413A (en) * 1982-04-13 1985-05-28 Minnesota Mining And Manufacturing Company Integrated magnetostrictive-piezoelectric-metal oxide semiconductor magnetic playback head
EP0440386A3 (en) * 1990-01-29 1993-04-14 International Business Machines Corporation Magnetic head and process for manufacturing same
EP0573148A3 (en) * 1992-06-05 1994-06-15 Hewlett Packard Co Conductor configuration for magnetoresistive transducers

Also Published As

Publication number Publication date
DE2632371A1 (de) 1977-02-24
FR2321169B1 (Direct) 1978-05-05
US4012781A (en) 1977-03-15
GB1539174A (en) 1979-01-31
JPS5223925A (en) 1977-02-23
IT1063687B (it) 1985-02-11
CA1068401A (en) 1979-12-18
JPS5732404B2 (Direct) 1982-07-10
GB1536735A (en) 1978-12-20

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Legal Events

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ST Notification of lapse