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JPS5794933A - Magnetic disk - Google Patents

Magnetic disk

Info

Publication number
JPS5794933A
JPS5794933A JP16959180A JP16959180A JPS5794933A JP S5794933 A JPS5794933 A JP S5794933A JP 16959180 A JP16959180 A JP 16959180A JP 16959180 A JP16959180 A JP 16959180A JP S5794933 A JPS5794933 A JP S5794933A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic layer
layer
recorded
coercive force
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
JP16959180A
Other languages
Japanese (ja)
Inventor
Kazuo Yamada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Ltd filed Critical Hitachi Ltd
Priority to JP16959180A priority Critical patent/JPS5794933A/en
Publication of JPS5794933A publication Critical patent/JPS5794933A/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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks

Landscapes

  • Magnetic Record Carriers (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Paints Or Removers (AREA)

Abstract

PURPOSE:To improve track density by recording data and a positioning signal in the same recording surface by laminating two magnetic layers, differing in coercive force, into two-layer structure. CONSTITUTION:On a substrate 1, the 1st magnetic laye 2 made of a magnetic material having much greater coercive force than that of the 2nd magnetic layer 3 is provided; when data is recorded on the magnetic layer 2, a magnetic field having greater coercive force than that of the layer 2 is applied when on the magnetic layer, a magnetic field having coercive force greater than that of the magnetic layer 2 and less than that of the magnetic layer 2 is applied. On the magnetic layer 2, a positioning signal only to be reproduced after it is once recorded is recorded and data is recorded on the magnetic layer 3.
JP16959180A 1980-12-03 1980-12-03 Magnetic disk Pending JPS5794933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16959180A JPS5794933A (en) 1980-12-03 1980-12-03 Magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16959180A JPS5794933A (en) 1980-12-03 1980-12-03 Magnetic disk

Publications (1)

Publication Number Publication Date
JPS5794933A true JPS5794933A (en) 1982-06-12

Family

ID=15889320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16959180A Pending JPS5794933A (en) 1980-12-03 1980-12-03 Magnetic disk

Country Status (1)

Country Link
JP (1) JPS5794933A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009158121A3 (en) * 2008-05-30 2010-03-04 The Regents Of The University Of California Magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009158121A3 (en) * 2008-05-30 2010-03-04 The Regents Of The University Of California Magnetic recording medium

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