JPS57176537A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57176537A
JPS57176537A JP56060268A JP6026881A JPS57176537A JP S57176537 A JPS57176537 A JP S57176537A JP 56060268 A JP56060268 A JP 56060268A JP 6026881 A JP6026881 A JP 6026881A JP S57176537 A JPS57176537 A JP S57176537A
Authority
JP
Japan
Prior art keywords
film
magnetic
coating
recording medium
thick
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
JP56060268A
Other languages
Japanese (ja)
Inventor
Hiroyoshi Kishi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56060268A priority Critical patent/JPS57176537A/en
Publication of JPS57176537A publication Critical patent/JPS57176537A/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
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction

Landscapes

  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To achieve a magnetic recording medium preventing the lowering in the running performance and reproduced output, without losing the magnetic characteristics, by providing a coating having a specific wear resistance on a film surface of Co-Cr alloy as a vertical magnetization film on a base. CONSTITUTION:The 1st layer 2 of high-permeability magnetic substance (Fe- Al-Si alloy film, 0.5mu thick) is provided on a base 1 (polyethylene terephthalate film, 25mu thick) and a Co-Cr alloy film 3 (vertical magnetization film) is formed on it. Further on it, a coating film 4 with wear resistance, about 300Angstrom thick is provided with the sputtering taking magnetic spacing into consideration. This coating material is selected from a group of Nb, Ta and Ba-ferrite. In comparison with a magnetic without this coating, the lowering factor in S/N ratio is <=20%. The weight value (g) when the coatig starts to be shaped, is remarkably increased to constitute a magnetic recording medium with durability.
JP56060268A 1981-04-21 1981-04-21 Magnetic recording medium Pending JPS57176537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56060268A JPS57176537A (en) 1981-04-21 1981-04-21 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56060268A JPS57176537A (en) 1981-04-21 1981-04-21 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57176537A true JPS57176537A (en) 1982-10-29

Family

ID=13137220

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56060268A Pending JPS57176537A (en) 1981-04-21 1981-04-21 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57176537A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982637A (en) * 1982-11-04 1984-05-12 Hitachi Ltd Vertical magnetic recording medium
JPS59157832A (en) * 1983-02-28 1984-09-07 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPS60138720A (en) * 1983-12-27 1985-07-23 Sharp Corp Vertical magnetic recording medium
JPS60224122A (en) * 1984-04-20 1985-11-08 Tokico Ltd Magnetic disk
JPS62107431A (en) * 1985-10-31 1987-05-18 Teijin Ltd Thin film type magnetic recording medium
US4729924A (en) * 1984-12-21 1988-03-08 Minnesota Mining And Manufacturing Company Metallic thin film magnetic recording medium having a hard protective layer
JPS6366722A (en) * 1986-04-03 1988-03-25 コ−マグ，インコ−ポレイテツド Corrosion and wear resistant magnetic disc
US4748073A (en) * 1985-06-29 1988-05-31 Kabushiki Kaisha Toshiba Perpendicular magnetic recording medium with multilayered protective layer
US4803130A (en) * 1984-12-21 1989-02-07 Minnesota Mining And Manufacturing Company Reactive sputtering process for recording media
US4929500A (en) * 1986-04-03 1990-05-29 Komag, Inc. Corrosion resistant magnetic disk

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982637A (en) * 1982-11-04 1984-05-12 Hitachi Ltd Vertical magnetic recording medium
JPH0416855B2 (en) * 1982-11-04 1992-03-25 Hitachi Seisakusho Kk
JPS59157832A (en) * 1983-02-28 1984-09-07 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPS60138720A (en) * 1983-12-27 1985-07-23 Sharp Corp Vertical magnetic recording medium
JPS60224122A (en) * 1984-04-20 1985-11-08 Tokico Ltd Magnetic disk
US4729924A (en) * 1984-12-21 1988-03-08 Minnesota Mining And Manufacturing Company Metallic thin film magnetic recording medium having a hard protective layer
US4803130A (en) * 1984-12-21 1989-02-07 Minnesota Mining And Manufacturing Company Reactive sputtering process for recording media
US4748073A (en) * 1985-06-29 1988-05-31 Kabushiki Kaisha Toshiba Perpendicular magnetic recording medium with multilayered protective layer
JPS62107431A (en) * 1985-10-31 1987-05-18 Teijin Ltd Thin film type magnetic recording medium
JPS6366722A (en) * 1986-04-03 1988-03-25 コ−マグ，インコ−ポレイテツド Corrosion and wear resistant magnetic disc
US4898774A (en) * 1986-04-03 1990-02-06 Komag, Inc. Corrosion and wear resistant magnetic disk
US4929500A (en) * 1986-04-03 1990-05-29 Komag, Inc. Corrosion resistant magnetic disk

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