GB1366034A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
GB1366034A
GB1366034A GB1901072A GB1901072A GB1366034A GB 1366034 A GB1366034 A GB 1366034A GB 1901072 A GB1901072 A GB 1901072A GB 1901072 A GB1901072 A GB 1901072A GB 1366034 A GB1366034 A GB 1366034A
Authority
GB
United Kingdom
Prior art keywords
base
magnetic
metal layer
recording medium
magnetic recording
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.)
Expired
Application number
GB1901072A
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 GB1366034A publication Critical patent/GB1366034A/en
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)

Abstract

1366034 Magnetic recording medium SONY CORP 24 April 1972 [26 April 1971] 19010/72 Heading B2E A magnetic recording medium comprises a non-magnetic organic polymeric base, a non- magnetic metal layer formed on the base and a magnetic coating layer formed on the metal layer on the base, in which the base has a thickness less than 25 microns and the metal layer has a thickness of 0.3-2 microns. Preferably the base is polyethylene terephthalate. The metal layer is preferably Ni or Cu which may be electroplated or electrolessly plated. γ-Fe 2 O 3 is specified, as a magnetic pigment to be applied to Ni on polyethylene terephthalate films, which may subsequently be coated with vinyl chloride resin, isocyanate resin, and/or vinylidene chloride - acrylonitrile copolymer. Carbon powder and lecithin, are alternative additives.
GB1901072A 1971-04-26 1972-04-24 Magnetic recording medium Expired GB1366034A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1366034A true GB1366034A (en) 1974-09-04

Family

ID=12219857

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1901072A Expired GB1366034A (en) 1971-04-26 1972-04-24 Magnetic recording medium

Country Status (7)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1536818A (en) * 1976-09-14 1978-12-20 Dainippon Printing Co Ltd Magnetic sable recording structure
JPH0610873B2 (en) * 1984-02-08 1994-02-09 日立マクセル株式会社 Magnetic disk
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 (en) * 1960-11-14 1961-10-06 Agfa Ag Two-layer magnetic recording medium having improved electrical conductivity
US3150939A (en) * 1961-07-17 1964-09-29 Ibm High density record carrier
DE1521152A1 (en) * 1965-07-16 1969-04-24 Basf Ag Metallization of plastic surfaces
FR1473728A (en) * 1966-04-01 1967-03-17 Wolfen Filmfab Veb Method and apparatus for producing magnetizable recording material, preferably in tape form

Also Published As

Publication number Publication date
NL7205642A (en) 1972-10-30
DE2220544A1 (en) 1972-11-09
JPS56850B1 (en) 1981-01-09
FR2134565B1 (en) 1974-12-20
IT953770B (en) 1973-08-10
CA981533A (en) 1976-01-13
FR2134565A1 (en) 1972-12-08

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee