JPS5740737A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5740737A
JPS5740737A JP11562780A JP11562780A JPS5740737A JP S5740737 A JPS5740737 A JP S5740737A JP 11562780 A JP11562780 A JP 11562780A JP 11562780 A JP11562780 A JP 11562780A JP S5740737 A JPS5740737 A JP S5740737A
Authority
JP
Japan
Prior art keywords
thickness
recording medium
magnetic recording
layer
alloy plate
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
JP11562780A
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 JP11562780A priority Critical patent/JPS5740737A/en
Publication of JPS5740737A publication Critical patent/JPS5740737A/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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/851—Coating a support with a magnetic layer by sputtering

Landscapes

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

Abstract

PURPOSE:To obtain a magnetic recording medium of a thin alloy plate providing high output and high-density recording by forming a ferromagnetic layer by diffusing prescribed atoms into the thin alloy plate. CONSTITUTION:On a long-sized thin plate of 100mum thickness consisting of 75wt% Cu and 25wt% Ni, Fe, etc., is vapor-deposited under high vacuum to form a uniform-quality layer of Fe, etc., to 3.5mum thickness and this layer is treated by cold-rolling in an atmosphere of hydrogen to about 3mum thickness. Further, it is hardened magnetically by aging in multistages in the atmosphere of hydrogen to form a hard ferromagnetic material layer to 100Angstrom -1mum thickness, thus obtaining a magnetic recording medium made of the thin alloy plate.
JP11562780A 1980-08-21 1980-08-21 Magnetic recording medium Pending JPS5740737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11562780A JPS5740737A (en) 1980-08-21 1980-08-21 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11562780A JPS5740737A (en) 1980-08-21 1980-08-21 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5740737A true JPS5740737A (en) 1982-03-06

Family

ID=14667324

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11562780A Pending JPS5740737A (en) 1980-08-21 1980-08-21 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5740737A (en)

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