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JPS57195324A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57195324A
JPS57195324A JP56077662A JP7766281A JPS57195324A JP S57195324 A JPS57195324 A JP S57195324A JP 56077662 A JP56077662 A JP 56077662A JP 7766281 A JP7766281 A JP 7766281A JP S57195324 A JPS57195324 A JP S57195324A
Authority
JP
Japan
Prior art keywords
recording medium
magnetic recording
paint
phosphate
formula
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.)
Pending
Application number
JP56077662A
Other languages
Japanese (ja)
Inventor
Shigeo Kimura
Toshio Masutani
Mitsuo Ohashi
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
Priority to JP56077662A priority Critical patent/JPS57195324A/en
Publication of JPS57195324A publication Critical patent/JPS57195324A/en
Pending 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
    • G11B5/73—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
    • G11B5/735—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 characterised by the back layer
    • G11B5/7356—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 characterised by the back layer comprising non-magnetic particles in the back layer, e.g. particles of TiO2, ZnO or SiO2
    • G11B5/7358—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 characterised by the back layer comprising non-magnetic particles in the back layer, e.g. particles of TiO2, ZnO or SiO2 specially adapted for achieving a specific property, e.g. average roughness [Ra]

Landscapes

  • Lubricants (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To improve lubricity and durability by coating the surface of a base with paint which contains phosphate. CONSTITUTION:On the opposite side to a magnetic metallic thin film of Co, etc., the surface of a nonmagnetic base is coated with paint, which contains about 1-15pts.wt. phosphate, shown by the right one-stage formula, for a 100pts.wt. binder such as a resin, to <= about 3mum dry film thickness. In the formula, (l), (m), and (n) are integers between 0-10, and R, R', and R'' are C8-20 hydrocarbon groups.
JP56077662A 1981-05-22 1981-05-22 Magnetic recording medium Pending JPS57195324A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56077662A JPS57195324A (en) 1981-05-22 1981-05-22 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56077662A JPS57195324A (en) 1981-05-22 1981-05-22 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57195324A true JPS57195324A (en) 1982-12-01

Family

ID=13640080

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56077662A Pending JPS57195324A (en) 1981-05-22 1981-05-22 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57195324A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62180519A (en) * 1986-02-01 1987-08-07 Victor Co Of Japan Ltd Magnetic recording medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50114205A (en) * 1974-02-15 1975-09-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50114205A (en) * 1974-02-15 1975-09-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62180519A (en) * 1986-02-01 1987-08-07 Victor Co Of Japan Ltd Magnetic recording medium

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