JPS59139136A - 磁気記録媒体 - Google Patents

磁気記録媒体

Info

Publication number
JPS59139136A
JPS59139136A JP58011777A JP1177783A JPS59139136A JP S59139136 A JPS59139136 A JP S59139136A JP 58011777 A JP58011777 A JP 58011777A JP 1177783 A JP1177783 A JP 1177783A JP S59139136 A JPS59139136 A JP S59139136A
Authority
JP
Japan
Prior art keywords
magnetic recording
layer
aperture
recording medium
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
JP58011777A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0363134B2 (en:Method
Inventor
Hiroyasu Karimoto
博保 刈本
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP58011777A priority Critical patent/JPS59139136A/ja
Publication of JPS59139136A publication Critical patent/JPS59139136A/ja
Publication of JPH0363134B2 publication Critical patent/JPH0363134B2/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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82—Disk carriers

Landscapes

  • Magnetic Record Carriers (AREA)
JP58011777A 1983-01-27 1983-01-27 磁気記録媒体 Granted JPS59139136A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58011777A JPS59139136A (ja) 1983-01-27 1983-01-27 磁気記録媒体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58011777A JPS59139136A (ja) 1983-01-27 1983-01-27 磁気記録媒体

Publications (2)

Publication Number Publication Date
JPS59139136A true JPS59139136A (ja) 1984-08-09
JPH0363134B2 JPH0363134B2 (en:Method) 1991-09-30

Family

ID=11787381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58011777A Granted JPS59139136A (ja) 1983-01-27 1983-01-27 磁気記録媒体

Country Status (1)

Country Link
JP (1) JPS59139136A (en:Method)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60179973A (ja) * 1984-02-27 1985-09-13 Anelva Corp 垂直磁気記録フロツピ−デイスク
JPH03124321U (en:Method) * 1990-03-30 1991-12-17
US5226033A (en) * 1990-03-27 1993-07-06 Sony Corporation Magneto-optical disk hub in which the inner peripheral edge portion of the spindle opening is strengthened and made abrasion resistant

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54147008A (en) * 1978-05-10 1979-11-16 Matsushita Electric Ind Co Ltd Magnetic recording medium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54147008A (en) * 1978-05-10 1979-11-16 Matsushita Electric Ind Co Ltd Magnetic recording medium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60179973A (ja) * 1984-02-27 1985-09-13 Anelva Corp 垂直磁気記録フロツピ−デイスク
US5226033A (en) * 1990-03-27 1993-07-06 Sony Corporation Magneto-optical disk hub in which the inner peripheral edge portion of the spindle opening is strengthened and made abrasion resistant
US5289456A (en) * 1990-03-27 1994-02-22 Sony Corporation Method of forming a magneto-optical disk hub in which the inner peripheral edge portion of the spindle opening is strengthened and made abrasion resistant
US5438564A (en) * 1990-03-27 1995-08-01 Sony Corporation Magneto-optical disk hub in which the inner peripheral edge portion of the spindle opening is strengthened and made abrasion resistant
JPH03124321U (en:Method) * 1990-03-30 1991-12-17

Also Published As

Publication number Publication date
JPH0363134B2 (en:Method) 1991-09-30

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