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FR2308158A1 - Dispositif d'exploration magnetique - Google Patents

Dispositif d'exploration magnetique

Info

Publication number
FR2308158A1
FR2308158A1 FR7611007A FR7611007A FR2308158A1 FR 2308158 A1 FR2308158 A1 FR 2308158A1 FR 7611007 A FR7611007 A FR 7611007A FR 7611007 A FR7611007 A FR 7611007A FR 2308158 A1 FR2308158 A1 FR 2308158A1
Authority
FR
France
Prior art keywords
exploration device
magnetic exploration
magnetic
exploration
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
FR7611007A
Other languages
English (en)
Other versions
FR2308158B1 (fr
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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
Priority claimed from NL7504396A external-priority patent/NL170898C/xx
Priority claimed from NL7504442A external-priority patent/NL7504442A/xx
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2308158A1 publication Critical patent/FR2308158A1/fr
Application granted granted Critical
Publication of FR2308158B1 publication Critical patent/FR2308158B1/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/025—Compensating stray 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
    • G11B5/48—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

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Magnetic Heads (AREA)
  • Measuring Magnetic Variables (AREA)
FR7611007A 1975-04-14 1976-04-14 Dispositif d'exploration magnetique Granted FR2308158A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7504396A NL170898C (nl) 1975-04-14 1975-04-14 Magnetoweerstand-kop.
NL7504442A NL7504442A (en) 1975-04-15 1975-04-15 Magneto-resistive transducer head - has strips of current conductor at oblique angle to magnetic field backing strip (NL191076)

Publications (2)

Publication Number Publication Date
FR2308158A1 true FR2308158A1 (fr) 1976-11-12
FR2308158B1 FR2308158B1 (fr) 1981-09-18

Family

ID=26645109

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7611007A Granted FR2308158A1 (fr) 1975-04-14 1976-04-14 Dispositif d'exploration magnetique

Country Status (6)

Country Link
US (1) US4142218A (fr)
JP (1) JPS51124410A (fr)
CA (1) CA1076252A (fr)
DE (1) DE2615539C2 (fr)
FR (1) FR2308158A1 (fr)
GB (1) GB1545295A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122505A (en) * 1976-10-19 1978-10-24 U.S. Philips Corporation Magneto-resistive reading head with suppression of thermal noise
US4141051A (en) * 1977-10-11 1979-02-20 U.S. Philips Corporation Variable dynamic range magneto-resistive head
EP0053343A1 (fr) * 1980-11-28 1982-06-09 Hitachi, Ltd. Circuit de reproduction et d'amplification pour tête magnéto-résistive
EP0081240A2 (fr) * 1981-12-09 1983-06-15 Matsushita Electric Industrial Co., Ltd. Tête magnétique à films minces
WO1989001685A1 (fr) * 1987-08-17 1989-02-23 Siemens Aktiengesellschaft Agencement d'enregistrement magnetique a systeme d'alignement des pistes
EP0304695A1 (fr) * 1987-08-17 1989-03-01 Siemens Aktiengesellschaft Dispositif d'emmagasinage magnétique avec un système de pistage
EP0348027A2 (fr) * 1988-06-21 1989-12-27 Hewlett-Packard Company Capteur magnétorésistif à courants opposés pour lecture de milieu à enregistrement perpendiculaire

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1126818A (fr) * 1978-03-27 1982-06-29 Hiroyuki Ohkubo Appareil detecteur d'un champ magnetique externe
US4191977A (en) * 1978-09-29 1980-03-04 International Business Machines Corporation Biasing of magnetoresistive read head using gyrators
JPS5766560A (en) * 1980-10-08 1982-04-22 Matsushita Electric Ind Co Ltd Control signal reproducing device
US4506220A (en) * 1980-11-10 1985-03-19 Canon Kabushiki Kaisha Temperature compensated magnetoresistive effect thin film magnetic sensor
JPS584992A (ja) * 1981-07-01 1983-01-12 Hitachi Ltd 磁気電気変換素子
DE3390321T1 (de) * 1982-11-11 1985-01-24 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Dünnfilm-Magnetkopf
US4535375A (en) * 1983-01-14 1985-08-13 Magnetic Peripherals, Inc. Magnetoresistive head
US4580175A (en) * 1983-01-14 1986-04-01 Magnetic Peripherals, Inc. Endless, folded magnetoresistive head
JPS59218617A (ja) * 1983-05-27 1984-12-08 Hitachi Ltd 磁気抵抗効果型多トラツクヘツド
DE3330077A1 (de) * 1983-08-19 1985-02-28 Siemens AG, 1000 Berlin und 8000 München Einrichtung zum herauslesen von informationen, die nach dem prinzip der senkrechten magnetisierung in einem aufzeichnungsmedium eingespeichert sind
JPS6145922A (ja) * 1984-08-10 1986-03-06 Hitachi Ltd 位置検出センサ
KR900004780B1 (ko) * 1985-09-13 1990-07-05 후지쓰 가부시끼가이샤 자기(磁氣) 센서를 사용한 위치 검출장치
SE459700B (sv) * 1987-11-26 1989-07-24 Profor Ab Saett att undertrycka verkan av magnetiska stoerfaelt vid detektering av paa en baerare anbringade magnetiska maerken eller markeringar
JP2586577B2 (ja) * 1988-05-30 1997-03-05 富士通株式会社 磁気抵抗素子
JPH0216475A (ja) * 1988-07-04 1990-01-19 Sharp Corp 超電導磁気測定装置
US4903158A (en) * 1988-07-28 1990-02-20 Eastman Kodak Company MR head with complementary easy axis permanent magnet
US4899240A (en) * 1988-07-28 1990-02-06 Eastman Kodak Company Biasing for a UMR head
US5027243A (en) * 1989-11-27 1991-06-25 Hewlett-Packard Company Self-initialization of short magnetoresistive sensors into a single domain state
US5155642A (en) * 1989-11-29 1992-10-13 International Business Machines Corporation Anisotropy configuration for longitudinally constrained magnetoresistive transducers
FR2656454B1 (fr) * 1989-12-22 1995-07-21 Thomson Csf Tete de lecture multipiste.
US5424890A (en) * 1990-02-05 1995-06-13 Sony Corporation Magnetoresistance effect type thin film head
US5390061A (en) 1990-06-08 1995-02-14 Hitachi, Ltd. Multilayer magnetoresistance effect-type magnetic head
US5065094A (en) * 1990-08-07 1991-11-12 Seagate Technology, Inc. Two terminal magnetoresistive sensor having DC blocking capacitor
DE69227758T2 (de) * 1991-12-05 1999-07-29 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Magnetoresistiver Kopf
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
US5696445A (en) * 1994-09-26 1997-12-09 Phase Metrics Method and apparatus for testing the resistive properties of magneto resistive materials using a time variable magnetic field
TW349690U (en) * 1994-12-16 1999-01-01 Ibm Magnetoresistive head with a magnetoresistive film shaped to provide an improved read sensitivity profile
US6201466B1 (en) * 2000-03-29 2001-03-13 Delphi Technologies, Inc. Magnetoresistor array
DE10342260B4 (de) 2003-09-11 2014-11-20 Meas Deutschland Gmbh Magnetoresistiver Sensor in Form einer Halb- oder Vollbrückenschaltung
US20070019335A1 (en) * 2005-07-20 2007-01-25 Hitachi Global Storage Technologies, Inc. Tape medium read head with unitary formation of multiple elements
WO2007074522A1 (fr) * 2005-12-27 2007-07-05 Fujitsu Limited Tête magnétique et dispositif à disque

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546579A (en) * 1968-10-22 1970-12-08 Sperry Rand Corp Thin-ferromagnetic-film magnetoresistance magnetometer sensitive to easy axis field components and biased to be insensitive to hard axis field components
FR2266253A1 (fr) * 1974-04-01 1975-10-24 Philips Nv
FR2269168A1 (fr) * 1974-04-29 1975-11-21 Philips Nv

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1272044A (en) * 1971-02-22 1972-04-26 Mullard Ltd Improvements in or relating to magnetoresistive readout transducers
US3716781A (en) * 1971-10-26 1973-02-13 Ibm Magnetoresistive sensing device for detection of magnetic fields having a shape anisotropy field and uniaxial anisotropy field which are perpendicular
US3945038A (en) * 1971-12-22 1976-03-16 Compagnie Internationale Pour L'informatique Read-write magnetoresistive transducer having a plurality of MR elements
US3813692A (en) * 1972-10-11 1974-05-28 Ibm Internally biased magnetoresistive magnetic transducer
FR2219482B1 (fr) * 1973-02-27 1978-03-03 Cii
FR2248566B1 (fr) * 1973-10-23 1976-11-19 Cii
US4052748A (en) * 1974-04-01 1977-10-04 U.S. Philips Corporation Magnetoresistive magnetic head
NL168981C (nl) * 1975-04-15 1982-05-17 Philips Nv Magnetoweerstand leeskop.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546579A (en) * 1968-10-22 1970-12-08 Sperry Rand Corp Thin-ferromagnetic-film magnetoresistance magnetometer sensitive to easy axis field components and biased to be insensitive to hard axis field components
FR2266253A1 (fr) * 1974-04-01 1975-10-24 Philips Nv
FR2269168A1 (fr) * 1974-04-29 1975-11-21 Philips Nv

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122505A (en) * 1976-10-19 1978-10-24 U.S. Philips Corporation Magneto-resistive reading head with suppression of thermal noise
US4141051A (en) * 1977-10-11 1979-02-20 U.S. Philips Corporation Variable dynamic range magneto-resistive head
EP0053343A1 (fr) * 1980-11-28 1982-06-09 Hitachi, Ltd. Circuit de reproduction et d'amplification pour tête magnéto-résistive
EP0081240A2 (fr) * 1981-12-09 1983-06-15 Matsushita Electric Industrial Co., Ltd. Tête magnétique à films minces
EP0081240A3 (en) * 1981-12-09 1985-08-21 Matsushita Electric Industrial Co., Ltd. Thin film magnetic head
WO1989001685A1 (fr) * 1987-08-17 1989-02-23 Siemens Aktiengesellschaft Agencement d'enregistrement magnetique a systeme d'alignement des pistes
EP0304695A1 (fr) * 1987-08-17 1989-03-01 Siemens Aktiengesellschaft Dispositif d'emmagasinage magnétique avec un système de pistage
EP0348027A2 (fr) * 1988-06-21 1989-12-27 Hewlett-Packard Company Capteur magnétorésistif à courants opposés pour lecture de milieu à enregistrement perpendiculaire
EP0348027A3 (fr) * 1988-06-21 1991-03-13 Hewlett-Packard Company Capteur magnétorésistif à courants opposés pour lecture de milieu à enregistrement perpendiculaire

Also Published As

Publication number Publication date
JPS51124410A (en) 1976-10-29
DE2615539C2 (de) 1986-01-16
US4142218A (en) 1979-02-27
CA1076252A (fr) 1980-04-22
GB1545295A (en) 1979-05-10
DE2615539A1 (de) 1976-10-28
FR2308158B1 (fr) 1981-09-18
JPS5713048B2 (fr) 1982-03-15

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Legal Events

Date Code Title Description
ST Notification of lapse