JPS5771524A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5771524A
JPS5771524A JP55148020A JP14802080A JPS5771524A JP S5771524 A JPS5771524 A JP S5771524A JP 55148020 A JP55148020 A JP 55148020A JP 14802080 A JP14802080 A JP 14802080A JP S5771524 A JPS5771524 A JP S5771524A
Authority
JP
Japan
Prior art keywords
magnetic
layer
alloy
contg
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.)
Pending
Application number
JP55148020A
Other languages
Japanese (ja)
Inventor
Sadanobu Kawasaki
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.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing Co 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 Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP55148020A priority Critical patent/JPS5771524A/en
Publication of JPS5771524A publication Critical patent/JPS5771524A/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 provide a magnetic recording medium having a protecting layer of superior mechanical strength, adhesive strength to a magnetic recording layer, surface smoothness, etc. by forming a magnetic metallic layer, and the protecting layer consisting of a non-magnetic Ni-base alloy contg. a specific amt. of P on a base material successively. CONSTITUTION:A conductive layer 2 consisting of a non-magnetic metal of copper or the like, an underlying metallic layer 3 consisting of a non-magnetic metallic material such as nickel alloy, and a magnetic metallic layer 4 consisting of a magnetic alloy of Ni-Co-P alloy, etc. are formed successively on a base material 1 consisting of polyester or the like by an electroless plating or the like. Thence, a protecting layer 5 consisting of a non-magnetic Ni-base alloy contg. 1-15wt% P and more preferably further contg. hardness improving elements of >=one kind selected from Mo, W, Re, Ru and Rh at an amt. up to 20wt% is formed on the layer 4 by an electroplating method using a plating bath contg. bivalent nickel ions and hypophosphite ions or the like, whereby the intended magnetic recording medium is obtained.
JP55148020A 1980-10-22 1980-10-22 Magnetic recording medium Pending JPS5771524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55148020A JPS5771524A (en) 1980-10-22 1980-10-22 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55148020A JPS5771524A (en) 1980-10-22 1980-10-22 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5771524A true JPS5771524A (en) 1982-05-04

Family

ID=15443304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55148020A Pending JPS5771524A (en) 1980-10-22 1980-10-22 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5771524A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4724188A (en) * 1984-06-07 1988-02-09 C. Uyemura and Co. Magnetic recording medium
US4735853A (en) * 1985-05-15 1988-04-05 Hitachi, Ltd. Magnetic recording medium having an amorphous, nonmagnetic nickel-tungston-phosphorus underlayer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4724188A (en) * 1984-06-07 1988-02-09 C. Uyemura and Co. Magnetic recording medium
US4735853A (en) * 1985-05-15 1988-04-05 Hitachi, Ltd. Magnetic recording medium having an amorphous, nonmagnetic nickel-tungston-phosphorus underlayer

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