JPS5737718A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5737718A
JPS5737718A JP11280880A JP11280880A JPS5737718A JP S5737718 A JPS5737718 A JP S5737718A JP 11280880 A JP11280880 A JP 11280880A JP 11280880 A JP11280880 A JP 11280880A JP S5737718 A JPS5737718 A JP S5737718A
Authority
JP
Japan
Prior art keywords
alloy plate
thin
ferromagnetic material
prescribed
thin alloy
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
JP11280880A
Other languages
Japanese (ja)
Inventor
Norishige Yamaguchi
Masaru Takayama
Masao Shigeta
Masatatsu Sugaya
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Priority to JP11280880A priority Critical patent/JPS5737718A/en
Publication of JPS5737718A publication Critical patent/JPS5737718A/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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers

Landscapes

  • Thin Magnetic Films (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To offer alloy thin-plate magnetic recording media which has sufficiently high recording density and are manufactured at a high yield, by varying the ion density of prescribed atoms in a thin alloy plate in its thickness direction. CONSTITUTION:On the surface of a raw thin alloy plate made of a ferromagnetic material, a coating containing prescribed atoms is formed and the ion density of the prescribed atoms is varied in the thickness direction of the thin alloy plate by a thermal diffusion treatment, etc.; and a prescribed magnetic hardening treatment is carried out to form a hard ferromagnetic material layer having 100Angstrom -1mum and a soft ferromagnetic material layer, is contact with the said layer, inthe thin alloy plate.
JP11280880A 1980-08-16 1980-08-16 Magnetic recording medium Pending JPS5737718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11280880A JPS5737718A (en) 1980-08-16 1980-08-16 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11280880A JPS5737718A (en) 1980-08-16 1980-08-16 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5737718A true JPS5737718A (en) 1982-03-02

Family

ID=14596041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11280880A Pending JPS5737718A (en) 1980-08-16 1980-08-16 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5737718A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211619A (en) * 1984-04-05 1985-10-24 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPS62180779A (en) * 1986-01-31 1987-08-08 Arisawa:Kk Sheet for ornamentation and its production
JP2008087796A (en) * 2006-09-29 2008-04-17 Dainippon Printing Co Ltd Carton

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211619A (en) * 1984-04-05 1985-10-24 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPS62180779A (en) * 1986-01-31 1987-08-08 Arisawa:Kk Sheet for ornamentation and its production
JP2008087796A (en) * 2006-09-29 2008-04-17 Dainippon Printing Co Ltd Carton

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