JPS57167123A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57167123A
JPS57167123A JP5077381A JP5077381A JPS57167123A JP S57167123 A JPS57167123 A JP S57167123A JP 5077381 A JP5077381 A JP 5077381A JP 5077381 A JP5077381 A JP 5077381A JP S57167123 A JPS57167123 A JP S57167123A
Authority
JP
Japan
Prior art keywords
matters
nonmagnetic
film
shaped
magnetic
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
JP5077381A
Other languages
Japanese (ja)
Other versions
JPH0315251B2 (en
Inventor
Kunio Wakai
Tsunemi Oiwa
Osamu Kitagami
Hideaki Niimi
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell Ltd
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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP5077381A priority Critical patent/JPS57167123A/en
Publication of JPS57167123A publication Critical patent/JPS57167123A/en
Publication of JPH0315251B2 publication Critical patent/JPH0315251B2/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
    • G11B5/84—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)

Abstract

PURPOSE:To obtain a magnetic recording medium superior in electromagnetic conversion characteristic and durability, by forming a resin coating film, which includes needle-shaped nonmagnetic matters and granular nonmagnetic matters, on a base and vapor-depositing a ferromagnetic metal from the oblique direction onto this film to form a magnetic film. CONSTITUTION:A resin coating film 2 which includes needle-shaped or flake- shaped nonmagnetic matters 3 and granular nonmagnetic matters 4, is formed on a base 1, and a ferromagnetic metal or alloy is vapor-deposited in vacuum onto the film 2 from the oblique direction (for example, the direction of an angle alpha of incidence=70 deg.) to form a magnetic film 5. The magnetic film 5 has >=100Angstrom width in the recording direction and has >=3 partitions, which buffer the magnetic mutual function, within 10mu length. Needle-shaped alpha-Fe2O3 powder and granular chromium oxide powder are used as nonmagnetic matters 3 and 4, respectively.
JP5077381A 1981-04-03 1981-04-03 Magnetic recording medium Granted JPS57167123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5077381A JPS57167123A (en) 1981-04-03 1981-04-03 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5077381A JPS57167123A (en) 1981-04-03 1981-04-03 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS57167123A true JPS57167123A (en) 1982-10-14
JPH0315251B2 JPH0315251B2 (en) 1991-02-28

Family

ID=12868147

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5077381A Granted JPS57167123A (en) 1981-04-03 1981-04-03 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57167123A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228304A (en) * 1975-08-28 1977-03-03 Fuji Photo Film Co Ltd Magnetic recording media
JPS5274307A (en) * 1975-12-17 1977-06-22 Ibm Magnetic recording media

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228304A (en) * 1975-08-28 1977-03-03 Fuji Photo Film Co Ltd Magnetic recording media
JPS5274307A (en) * 1975-12-17 1977-06-22 Ibm Magnetic recording media

Also Published As

Publication number Publication date
JPH0315251B2 (en) 1991-02-28

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