GB1417521A - Magnetic recording media - Google Patents

Magnetic recording media

Info

Publication number
GB1417521A
GB1417521A GB1782173A GB1782173A GB1417521A GB 1417521 A GB1417521 A GB 1417521A GB 1782173 A GB1782173 A GB 1782173A GB 1782173 A GB1782173 A GB 1782173A GB 1417521 A GB1417521 A GB 1417521A
Authority
GB
United Kingdom
Prior art keywords
magnetic recording
coated
recording media
layer
april
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
GB1782173A
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB1417521A publication Critical patent/GB1417521A/en
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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum

Landscapes

  • Magnetic Record Carriers (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Physical Vapour Deposition (AREA)
  • Thin Magnetic Films (AREA)

Abstract

1417521 Coated magnetic recording media BADISCHE ANILIN-& SODA-FABRIK AG 13 April 1973 [15 April 1972] 17821/73 Heading C7F A magnetic recording medium comprises a dimensionally stable base coated with a ferromagnetic metal film at least 600 Š thick which in turn is coated with WC. The base may be a disc of Al or Al alloy or a sheet of polyimide or poly(amideimide) and the ferromagnetic layer may be Co-P, or a P, B, or N- containing layer of Co-Ni, Co-Fe, or Co-Ni-Fe, typically 600-6000 Š thick, produced by electro-plating, electroless deposition or vacuum vapour deposition. The WC layer, produced e.g. by electron beam evaporation, may be up to 2500 Š, e.g. 80-1500 Š, and provides wearresistance.
GB1782173A 1972-04-15 1973-04-13 Magnetic recording media Expired GB1417521A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2218306A DE2218306C3 (en) 1972-04-15 1972-04-15 Magnetic recording medium

Publications (1)

Publication Number Publication Date
GB1417521A true GB1417521A (en) 1975-12-10

Family

ID=5842074

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1782173A Expired GB1417521A (en) 1972-04-15 1973-04-13 Magnetic recording media

Country Status (4)

Country Link
JP (1) JPS4920081A (en)
DE (1) DE2218306C3 (en)
FR (1) FR2180802B3 (en)
GB (1) GB1417521A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569033A1 (en) * 1984-08-10 1986-02-14 Canon Kk OPTICAL RECORDING MEDIUM
GB2165264A (en) * 1984-09-28 1986-04-09 Canon Kk An optical recording medium
GB2226334A (en) * 1988-11-25 1990-06-27 Atomic Energy Authority Uk Multilayer coatings

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258509A (en) * 1975-11-08 1977-05-14 Nakamatsu Yoshiro Medium air pressing recorder reproducer
JPS5258518A (en) * 1975-11-08 1977-05-14 Nakamatsu Yoshiro Air head recorder reproducer
US4074330A (en) * 1976-08-30 1978-02-14 International Business Machines Corporation Flexible disk storage apparatus
JPS60160001A (en) * 1984-01-31 1985-08-21 Nippon Kogaku Kk <Nikon> Thin metallic film having its surface protected by carbide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569033A1 (en) * 1984-08-10 1986-02-14 Canon Kk OPTICAL RECORDING MEDIUM
GB2165264A (en) * 1984-09-28 1986-04-09 Canon Kk An optical recording medium
GB2226334A (en) * 1988-11-25 1990-06-27 Atomic Energy Authority Uk Multilayer coatings

Also Published As

Publication number Publication date
DE2218306A1 (en) 1973-10-25
DE2218306C3 (en) 1981-07-30
DE2218306B2 (en) 1980-10-16
FR2180802B3 (en) 1976-04-02
JPS4920081A (en) 1974-02-22
FR2180802A1 (en) 1973-11-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee