FR2150335A1 - - Google Patents

Info

Publication number
FR2150335A1
FR2150335A1 FR7228656A FR7228656A FR2150335A1 FR 2150335 A1 FR2150335 A1 FR 2150335A1 FR 7228656 A FR7228656 A FR 7228656A FR 7228656 A FR7228656 A FR 7228656A FR 2150335 A1 FR2150335 A1 FR 2150335A1
Authority
FR
France
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
FR7228656A
Other languages
French (fr)
Other versions
FR2150335B1 (de
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 FR2150335A1 publication Critical patent/FR2150335A1/fr
Application granted granted Critical
Publication of FR2150335B1 publication Critical patent/FR2150335B1/fr
Expired 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
    • G11B5/187—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
    • G11B5/2452—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 where the dimensions of the effective gap are controlled
    • 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
    • G11B5/313—Disposition of layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
FR7228656A 1971-08-21 1972-08-03 Expired FR2150335B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3931671 1971-08-21

Publications (2)

Publication Number Publication Date
FR2150335A1 true FR2150335A1 (de) 1973-04-06
FR2150335B1 FR2150335B1 (de) 1978-09-29

Family

ID=10408905

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7228656A Expired FR2150335B1 (de) 1971-08-21 1972-08-03

Country Status (6)

Country Link
JP (1) JPS4830412A (de)
CA (1) CA960356A (de)
DE (1) DE2233453A1 (de)
FR (1) FR2150335B1 (de)
GB (1) GB1344890A (de)
IT (1) IT963420B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040994A1 (de) * 1980-04-02 1981-12-02 COMPAGNIE INTERNATIONALE POUR L'INFORMATIQUE CII - HONEYWELL BULL (dite CII-HB) Magnetwandler, der einen Spalt mit veränderbarer Grössen-Dimension aufweist, zur Wiedergabe oder zum Aufzeichnen von Informationen eines magnetischen Trägers
EP0041409A1 (de) * 1980-04-02 1981-12-09 COMPAGNIE INTERNATIONALE POUR L'INFORMATIQUE CII - HONEYWELL BULL (dite CII-HB) Magnetwandler zur Wiedergabe oder zum Aufzeichnen von Informationen eines magnetischen Trägers
EP0046697A1 (de) * 1980-08-27 1982-03-03 COMPAGNIE INTERNATIONALE POUR L'INFORMATIQUE CII - HONEYWELL BULL (dite CII-HB) Integrierter Magnetwandler
FR2527820A1 (fr) * 1982-05-26 1983-12-02 Ferix Corp Tete et dispositif d'ecriture magnetique a concentration de champ et permeabilite differentielle

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940004989B1 (ko) * 1989-08-04 1994-06-09 마쯔시다덴기산교 가부시기가이샤 박막자기헤드
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
JPH0383213A (ja) * 1989-08-24 1991-04-09 Matsushita Electric Ind Co Ltd 薄膜磁気ヘッド
US6771462B1 (en) 1999-09-20 2004-08-03 Seagate Technology Llc Perpendicular recording head including concave tip
WO2001026097A1 (en) * 1999-10-05 2001-04-12 Seagate Technology, Llc Longitudinal magnetic recording heads with variable-length gaps
US6865056B1 (en) 1999-10-05 2005-03-08 Seagate Technology Llc Longitudinal magnetic recording heads with variable-length gaps
US6898053B1 (en) 1999-10-26 2005-05-24 Seagate Technology Llc Perpendicular recording head with trackwidth defined by plating thickness
US6560069B1 (en) 1999-11-29 2003-05-06 Seagate Technology, Llc Perpendicular recording head defining the trackwidth by material deposition thickness
US6707642B1 (en) 2000-02-04 2004-03-16 Seagate Technology Llc Longitudinal magnetic recording head with reduced side fringing
US6693768B1 (en) 2000-03-15 2004-02-17 Seagate Technology Llc Perpendicular magnetic recording head having a flux focusing main pole

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963690A (en) * 1957-10-14 1960-12-06 Ibm Magnetic transducer
US3171107A (en) * 1961-07-03 1965-02-23 Ibm Wide-record narrow-read magnetic head

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040994A1 (de) * 1980-04-02 1981-12-02 COMPAGNIE INTERNATIONALE POUR L'INFORMATIQUE CII - HONEYWELL BULL (dite CII-HB) Magnetwandler, der einen Spalt mit veränderbarer Grössen-Dimension aufweist, zur Wiedergabe oder zum Aufzeichnen von Informationen eines magnetischen Trägers
EP0041409A1 (de) * 1980-04-02 1981-12-09 COMPAGNIE INTERNATIONALE POUR L'INFORMATIQUE CII - HONEYWELL BULL (dite CII-HB) Magnetwandler zur Wiedergabe oder zum Aufzeichnen von Informationen eines magnetischen Trägers
EP0046697A1 (de) * 1980-08-27 1982-03-03 COMPAGNIE INTERNATIONALE POUR L'INFORMATIQUE CII - HONEYWELL BULL (dite CII-HB) Integrierter Magnetwandler
FR2527820A1 (fr) * 1982-05-26 1983-12-02 Ferix Corp Tete et dispositif d'ecriture magnetique a concentration de champ et permeabilite differentielle

Also Published As

Publication number Publication date
CA960356A (en) 1974-12-31
DE2233453A1 (de) 1973-02-22
JPS4830412A (de) 1973-04-21
GB1344890A (en) 1974-01-23
IT963420B (it) 1974-01-10
FR2150335B1 (de) 1978-09-29

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Legal Events

Date Code Title Description
ST Notification of lapse