JPS6479932A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS6479932A
JPS6479932A JP23688587A JP23688587A JPS6479932A JP S6479932 A JPS6479932 A JP S6479932A JP 23688587 A JP23688587 A JP 23688587A JP 23688587 A JP23688587 A JP 23688587A JP S6479932 A JPS6479932 A JP S6479932A
Authority
JP
Japan
Prior art keywords
film
protective layer
recording medium
compd
durability
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
JP23688587A
Other languages
Japanese (ja)
Inventor
Osamu Kitagami
Hideo Fujiwara
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 JP23688587A priority Critical patent/JPS6479932A/en
Publication of JPS6479932A publication Critical patent/JPS6479932A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To enhance the corrosion resistance and durability of a recording medium by laminating respective protective layers consisting of a B compd. and carbon system on a magnetic layer. CONSTITUTION:A CO80Ni20 alloy is evaporated from a vapor source 7 by electron beam heating and is deposited diagonally on a PET film 13 while gaseous oxygen is blown from a nozzle 9 at the time of delivering the above-mentioned film from a roll 2 and running the film along a can 3. The B film 11 as the 1st protective layer is then deposited by evaporation continuously on the film by means of a can 4. The carbon film 10 as the 2nd protective layer is thereafter formed thereon by a high-frequency sputtering method. As a result, the corrosion preventive effect of the protective layer consisting of the B or B compd. and the wear resistance of the protective layer of the carbon system are superposed and the recording medium having the good corrosion resistance and durability is obtd.
JP23688587A 1987-09-21 1987-09-21 Magnetic recording medium Pending JPS6479932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23688587A JPS6479932A (en) 1987-09-21 1987-09-21 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23688587A JPS6479932A (en) 1987-09-21 1987-09-21 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS6479932A true JPS6479932A (en) 1989-03-24

Family

ID=17007221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23688587A Pending JPS6479932A (en) 1987-09-21 1987-09-21 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS6479932A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5552204A (en) * 1995-01-13 1996-09-03 International Business Machines Corporation Magnetic disk with boron carbide overcoat layer
JP2006351135A (en) * 2005-06-17 2006-12-28 Hoya Corp Magnetic disk and manufacturing method for magnetic disk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5552204A (en) * 1995-01-13 1996-09-03 International Business Machines Corporation Magnetic disk with boron carbide overcoat layer
JP2006351135A (en) * 2005-06-17 2006-12-28 Hoya Corp Magnetic disk and manufacturing method for magnetic disk

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