FR2134565B1 - - Google Patents

Info

Publication number
FR2134565B1
FR2134565B1 FR7214925A FR7214925A FR2134565B1 FR 2134565 B1 FR2134565 B1 FR 2134565B1 FR 7214925 A FR7214925 A FR 7214925A FR 7214925 A FR7214925 A FR 7214925A FR 2134565 B1 FR2134565 B1 FR 2134565B1
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.)
Expired
Application number
FR7214925A
Other languages
French (fr)
Other versions
FR2134565A1 (it
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Publication of FR2134565A1 publication Critical patent/FR2134565A1/fr
Application granted granted Critical
Publication of FR2134565B1 publication Critical patent/FR2134565B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/06—Thin magnetic films, e.g. of one-domain structure characterised by the coupling or physical contact with connecting or interacting conductors
    • 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
    • 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
    • G11B5/7371—Non-magnetic single underlayer comprising nickel
    • 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73911—Inorganic substrates
    • G11B5/73913—Composites or coated substrates
    • 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Chemically Coating (AREA)
FR7214925A 1971-04-26 1972-04-26 Expired FR2134565B1 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2739571A JPS56850B1 (it) 1971-04-26 1971-04-26

Publications (2)

Publication Number Publication Date
FR2134565A1 FR2134565A1 (it) 1972-12-08
FR2134565B1 true FR2134565B1 (it) 1974-12-20

Family

ID=12219857

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7214925A Expired FR2134565B1 (it) 1971-04-26 1972-04-26

Country Status (7)

Country Link
JP (1) JPS56850B1 (it)
CA (1) CA981533A (it)
DE (1) DE2220544A1 (it)
FR (1) FR2134565B1 (it)
GB (1) GB1366034A (it)
IT (1) IT953770B (it)
NL (1) NL7205642A (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1091347A (en) * 1976-09-14 1980-12-09 Makoto Honda Magnetic recording structure
JPH0610873B2 (ja) * 1984-02-08 1994-02-09 日立マクセル株式会社 磁気デイスク
US4698251A (en) * 1985-01-22 1987-10-06 Victor Company Of Japan, Limited Magnetic recording medium and method of producing the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1273334A (fr) * 1960-11-14 1961-10-06 Agfa Ag Support d'enregistrement magnétique à deux couches possédant une conductivité électrique améliorée
US3150939A (en) * 1961-07-17 1964-09-29 Ibm High density record carrier
DE1521152A1 (de) * 1965-07-16 1969-04-24 Basf Ag Metallisierung von Kunststoffoberflaechen
FR1473728A (fr) * 1966-04-01 1967-03-17 Wolfen Filmfab Veb Procédé et dispositif de production d'un matériau d'enregistrement magnétisable,de préférence sous forme de bande

Also Published As

Publication number Publication date
JPS56850B1 (it) 1981-01-09
NL7205642A (it) 1972-10-30
IT953770B (it) 1973-08-10
GB1366034A (en) 1974-09-04
FR2134565A1 (it) 1972-12-08
CA981533A (en) 1976-01-13
DE2220544A1 (de) 1972-11-09

Similar Documents

Publication Publication Date Title
ATA136472A (it)
AU2658571A (it)
AU2691671A (it)
AU2485671A (it)
AU3005371A (it)
AU2952271A (it)
AU2941471A (it)
AU2894671A (it)
AU2742671A (it)
AU2684071A (it)
AU2564071A (it)
AU2473671A (it)
AU2399971A (it)
AU3038671A (it)
AU2486471A (it)
AU3025871A (it)
AU2503871A (it)
AU2456871A (it)
AU2577671A (it)
AU2588771A (it)
AU2654071A (it)
AU2455871A (it)
AU2669471A (it)
AU2415871A (it)
AR192311Q (it)

Legal Events

Date Code Title Description
ST Notification of lapse