FR2480014A1 - Transducteur magnetique de lecture et/ou d'enregistrement d'informations contenues sur un support magnetique - Google Patents

Transducteur magnetique de lecture et/ou d'enregistrement d'informations contenues sur un support magnetique Download PDF

Info

Publication number
FR2480014A1
FR2480014A1 FR8007454A FR8007454A FR2480014A1 FR 2480014 A1 FR2480014 A1 FR 2480014A1 FR 8007454 A FR8007454 A FR 8007454A FR 8007454 A FR8007454 A FR 8007454A FR 2480014 A1 FR2480014 A1 FR 2480014A1
Authority
FR
France
Prior art keywords
magnetic
transducer
track
gap
reading
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
FR8007454A
Other languages
English (en)
French (fr)
Other versions
FR2480014B1 (enExample
Inventor
Jacques Desserre
Michel Helle
Jean-Pierre Lazzari
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.)
CII HONEYWELL BULL
Original Assignee
CII HONEYWELL BULL
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 CII HONEYWELL BULL filed Critical CII HONEYWELL BULL
Priority to FR8007454A priority Critical patent/FR2480014A1/fr
Priority to US06/242,923 priority patent/US4380784A/en
Priority to EP81400434A priority patent/EP0041409A1/fr
Priority to JP4852781A priority patent/JPS56153519A/ja
Publication of FR2480014A1 publication Critical patent/FR2480014A1/fr
Application granted granted Critical
Publication of FR2480014B1 publication Critical patent/FR2480014B1/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
    • G11B5/31—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
    • G11B5/187—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
    • G11B5/313—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
    • G11B5/3153—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 including at least one magnetic thin film coupled by interfacing to the basic magnetic thin film structure

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Heads (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
FR8007454A 1980-04-02 1980-04-02 Transducteur magnetique de lecture et/ou d'enregistrement d'informations contenues sur un support magnetique Granted FR2480014A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8007454A FR2480014A1 (fr) 1980-04-02 1980-04-02 Transducteur magnetique de lecture et/ou d'enregistrement d'informations contenues sur un support magnetique
US06/242,923 US4380784A (en) 1980-04-02 1981-03-12 Magnetic transducer for reading and/or recording of data contained on a magnetic carrier
EP81400434A EP0041409A1 (fr) 1980-04-02 1981-03-20 Transducteur magnétique pour la lecture ou l'écriture des informations d'un support magnétique
JP4852781A JPS56153519A (en) 1980-04-02 1981-04-02 Transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8007454A FR2480014A1 (fr) 1980-04-02 1980-04-02 Transducteur magnetique de lecture et/ou d'enregistrement d'informations contenues sur un support magnetique

Publications (2)

Publication Number Publication Date
FR2480014A1 true FR2480014A1 (fr) 1981-10-09
FR2480014B1 FR2480014B1 (enExample) 1985-02-22

Family

ID=9240465

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8007454A Granted FR2480014A1 (fr) 1980-04-02 1980-04-02 Transducteur magnetique de lecture et/ou d'enregistrement d'informations contenues sur un support magnetique

Country Status (4)

Country Link
US (1) US4380784A (enExample)
EP (1) EP0041409A1 (enExample)
JP (1) JPS56153519A (enExample)
FR (1) FR2480014A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763215A (en) * 1982-10-22 1988-08-09 Cii-Honeywell Bull (Societe Anonyme) Device for writing high density data on a magnetic medium

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4604669A (en) * 1984-09-04 1986-08-05 Honeywell Inc. Magnetostrictive record head
US4935832A (en) * 1987-04-01 1990-06-19 Digital Equipment Corporation Recording heads with side shields
US5253134A (en) * 1990-05-09 1993-10-12 Fuji Photo Film Co., Ltd. Thin-film magnetic 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
US5949628A (en) * 1993-10-05 1999-09-07 Canon Denshi Kabushiki Kaisha Magnetic head including magnetic core accommodated in shielding case
JPH09293209A (ja) * 1996-04-26 1997-11-11 Fujitsu Ltd 薄膜磁気ヘッド、磁気記録装置及び薄膜磁気ヘッドの製造方法
US6510022B1 (en) * 2000-02-15 2003-01-21 International Business Machines Corporation Method for shaping pole pieces of magnetic heads by chemical mechanical polishing
US7768741B2 (en) * 2006-05-22 2010-08-03 Hitachi Global Storage Technologies Netherlands B.V. Magnetic write head design for reducing wide area track erasure

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB746537A (en) 1953-03-04 1956-03-14 Clevite Corp Improvements in or relating to magnetic transducer heads
CH353907A (de) * 1957-03-13 1961-04-30 Tiller Hans Einrichtung zur Verringerung oder Beseitigung der Übersprechwirkung der Signale einer Magnetspur auf den Wiedergabekopf oder den kombinierten Wiedergabe-und Aufnahmekopf einer benachbarten Magnetspur
US3353168A (en) * 1964-04-09 1967-11-14 Potter Instrument Co Inc Wide-record narrow-read magnetic head
US3700827A (en) * 1970-01-31 1972-10-24 Nippon Electric Co Magnetic head including thin magnetic film separated by a gap spacer
GB1344890A (en) * 1971-08-21 1974-01-23 Ibm Electromagnetic transducers
GB1357400A (en) 1971-11-03 1974-06-19 Ibm Magnetic recording and reproducing apparatus
FR2218611B1 (enExample) * 1973-02-21 1976-09-10 Cii
FR2297475A1 (fr) * 1975-01-10 1976-08-06 Cii Perfectionnements exportes aux structures de tetes magnetiques du type dit " integre "
JPS52138915A (en) * 1976-05-14 1977-11-19 Fujitsu Ltd Magnetic head
DE2721452A1 (de) * 1977-05-12 1978-11-16 Siemens Ag Integrierte magnetkopfstruktur und verfahren zu ihrer herstellung
JPS5476217A (en) * 1977-11-30 1979-06-18 Nec Corp Narrow track magnetic head
JPS5483415A (en) * 1977-12-15 1979-07-03 Nec Corp Narrow track magnetic head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763215A (en) * 1982-10-22 1988-08-09 Cii-Honeywell Bull (Societe Anonyme) Device for writing high density data on a magnetic medium

Also Published As

Publication number Publication date
EP0041409A1 (fr) 1981-12-09
US4380784A (en) 1983-04-19
JPS56153519A (en) 1981-11-27
FR2480014B1 (enExample) 1985-02-22

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Date Code Title Description
ST Notification of lapse