FR2140243A1 - - Google Patents

Info

Publication number
FR2140243A1
FR2140243A1 FR7220512A FR7220512A FR2140243A1 FR 2140243 A1 FR2140243 A1 FR 2140243A1 FR 7220512 A FR7220512 A FR 7220512A FR 7220512 A FR7220512 A FR 7220512A FR 2140243 A1 FR2140243 A1 FR 2140243A1
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
FR7220512A
Other versions
FR2140243B1 (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.)
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 FR2140243A1 publication Critical patent/FR2140243A1/fr
Application granted granted Critical
Publication of FR2140243B1 publication Critical patent/FR2140243B1/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
    • G11B5/48—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
    • G11B5/488—Disposition of 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/1272—Assembling or shaping of elements
    • 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
    • G11B5/147—Structure or manufacture of heads, e.g. inductive with cores being composed of metal sheets, i.e. laminated cores with cores composed of isolated magnetic layers, e.g. sheets
    • 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
    • G11B5/147—Structure or manufacture of heads, e.g. inductive with cores being composed of metal sheets, i.e. laminated cores with cores composed of isolated magnetic layers, e.g. sheets
    • G11B5/1475—Assembling or shaping of elements
    • 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
    • G11B5/21—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features the pole pieces being of ferrous sheet metal or other magnetic 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/29—Structure or manufacture of unitary devices formed of plural heads for more than 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
    • G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
FR7220512A 1971-06-04 1972-06-01 Expired FR2140243B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14997371A 1971-06-04 1971-06-04
US14997471A 1971-06-04 1971-06-04

Publications (2)

Publication Number Publication Date
FR2140243A1 true FR2140243A1 (fr) 1973-01-12
FR2140243B1 FR2140243B1 (fr) 1978-03-03

Family

ID=26847199

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7220512A Expired FR2140243B1 (fr) 1971-06-04 1972-06-01

Country Status (3)

Country Link
DE (1) DE2218969A1 (fr)
FR (1) FR2140243B1 (fr)
GB (1) GB1372474A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393395A1 (fr) * 1977-03-24 1978-12-29 Indep Broadcasting Authority Appareil d'enregistrement et de lecture magnetique
FR2463967A1 (fr) * 1979-08-23 1981-02-27 Rca Corp Tete magnetique multicanaux pour systeme enregistreur-lecteur
FR2508216A1 (fr) * 1981-06-19 1982-12-24 Thomson Csf Tete magnetique pour ecriture, lecture et effacement sur piste magnetique etroite, et procede de fabrication de cette tete magnetique, simple ou multipiste

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5634128A (en) * 1979-08-23 1981-04-06 Rca Corp Multiple magnetic head for record*reproduction device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393395A1 (fr) * 1977-03-24 1978-12-29 Indep Broadcasting Authority Appareil d'enregistrement et de lecture magnetique
FR2463967A1 (fr) * 1979-08-23 1981-02-27 Rca Corp Tete magnetique multicanaux pour systeme enregistreur-lecteur
FR2508216A1 (fr) * 1981-06-19 1982-12-24 Thomson Csf Tete magnetique pour ecriture, lecture et effacement sur piste magnetique etroite, et procede de fabrication de cette tete magnetique, simple ou multipiste
EP0068995A1 (fr) * 1981-06-19 1983-01-05 Thomson-Csf Tête magnétique pour écriture, lecture et effacement sur piste magnétique étroite, et procédé de fabrication de cette tête magnétique, simple ou multipiste

Also Published As

Publication number Publication date
GB1372474A (en) 1974-10-30
FR2140243B1 (fr) 1978-03-03
DE2218969A1 (de) 1973-04-12

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Legal Events

Date Code Title Description
ST Notification of lapse