JPS57169925A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57169925A
JPS57169925A JP56056042A JP5604281A JPS57169925A JP S57169925 A JPS57169925 A JP S57169925A JP 56056042 A JP56056042 A JP 56056042A JP 5604281 A JP5604281 A JP 5604281A JP S57169925 A JPS57169925 A JP S57169925A
Authority
JP
Japan
Prior art keywords
magnetic
support
recording medium
layer
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.)
Granted
Application number
JP56056042A
Other languages
Japanese (ja)
Other versions
JPS6256570B2 (en
Inventor
Kenji Yazawa
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 JP56056042A priority Critical patent/JPS57169925A/en
Priority to CA000400530A priority patent/CA1188796A/en
Priority to DE19823213352 priority patent/DE3213352A1/en
Priority to GB8210807A priority patent/GB2096647B/en
Priority to NL8201567A priority patent/NL8201567A/en
Priority to FR8206428A priority patent/FR2503909B1/en
Publication of JPS57169925A publication Critical patent/JPS57169925A/en
Priority to US06/540,707 priority patent/US4539265A/en
Publication of JPS6256570B2 publication Critical patent/JPS6256570B2/ja
Granted 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

Abstract

PURPOSE:To achieve a magnetic recording medium with high performance by forming a magnetic film of high coercive magnetic force on a high polymer support with comparatively lower heat resistance, by forming Bi layers on a nonmagnetic support in discontinuous islands and a metallic magnetic thin film thereon. CONSTITUTION:A high polymer film with comparatively lower heat resistance such as polyethylene terephthalate is used as a support 1, Bi is vapor-deposited on the major plane as discontinuous islands 2 and a background layer 2 is formed. Next, a metallic magnetic layer 3 such as Co covering the entire surface of an exposed part of the layer 2 and the support 1 is formed to make a magnetic recording medium 4. The islands 2 can be formed by vapor deposition of Bi at the temperature from 130 deg.C to the melting point of Bi. Since the support 1 is hardly deformed through indirect contact of metallic particles at high temperatures due to forming of the layer 3 next, plastic can be used. Thus, a magnetic recording medium suitable for a disc of magnetic isotropy with high coercive force can be obtained.
JP56056042A 1981-04-14 1981-04-14 Magnetic recording medium Granted JPS57169925A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP56056042A JPS57169925A (en) 1981-04-14 1981-04-14 Magnetic recording medium
CA000400530A CA1188796A (en) 1981-04-14 1982-04-06 Magnetic recording medium
DE19823213352 DE3213352A1 (en) 1981-04-14 1982-04-08 MAGNETIC RECORDING MEDIUM
GB8210807A GB2096647B (en) 1981-04-14 1982-04-14 Magnetic recording media
NL8201567A NL8201567A (en) 1981-04-14 1982-04-14 MAGNETIC RECORD MEDIUM.
FR8206428A FR2503909B1 (en) 1981-04-14 1982-04-14 MAGNETIC RECORDING MEANS
US06/540,707 US4539265A (en) 1981-04-14 1983-10-11 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56056042A JPS57169925A (en) 1981-04-14 1981-04-14 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS57169925A true JPS57169925A (en) 1982-10-19
JPS6256570B2 JPS6256570B2 (en) 1987-11-26

Family

ID=13016025

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56056042A Granted JPS57169925A (en) 1981-04-14 1981-04-14 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57169925A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60170030A (en) * 1984-02-10 1985-09-03 Sony Corp Production of magnetic recording medium
JPH03189922A (en) * 1989-10-05 1991-08-19 Internatl Business Mach Corp <Ibm> Magnetic memory medium and method of manufacturing the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60170030A (en) * 1984-02-10 1985-09-03 Sony Corp Production of magnetic recording medium
JPH0550053B2 (en) * 1984-02-10 1993-07-28 Sony Corp
JPH03189922A (en) * 1989-10-05 1991-08-19 Internatl Business Mach Corp <Ibm> Magnetic memory medium and method of manufacturing the same
JPH0561685B2 (en) * 1989-10-05 1993-09-06 Ibm

Also Published As

Publication number Publication date
JPS6256570B2 (en) 1987-11-26

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