DE69103778T2 - Magnetische Aufzeichnungsplatte. - Google Patents

Magnetische Aufzeichnungsplatte.

Info

Publication number
DE69103778T2
DE69103778T2 DE69103778T DE69103778T DE69103778T2 DE 69103778 T2 DE69103778 T2 DE 69103778T2 DE 69103778 T DE69103778 T DE 69103778T DE 69103778 T DE69103778 T DE 69103778T DE 69103778 T2 DE69103778 T2 DE 69103778T2
Authority
DE
Germany
Prior art keywords
magnetic recording
recording disk
disk
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.)
Expired - Fee Related
Application number
DE69103778T
Other languages
English (en)
Other versions
DE69103778D1 (de
Inventor
Kiyoshi Ota
Kazuhiro Kimura
Kenji Yazawa
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.)
Sony Corp
Original Assignee
Sony Corp
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
Priority claimed from JP02298724A external-priority patent/JP3038888B2/ja
Application filed by Sony Corp filed Critical Sony Corp
Publication of DE69103778D1 publication Critical patent/DE69103778D1/de
Application granted granted Critical
Publication of DE69103778T2 publication Critical patent/DE69103778T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
    • G11B5/7373—Non-magnetic single underlayer comprising chromium
DE69103778T 1990-01-19 1991-01-18 Magnetische Aufzeichnungsplatte. Expired - Fee Related DE69103778T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP850890 1990-01-19
JP02298724A JP3038888B2 (ja) 1990-01-19 1990-11-02 磁気ディスク

Publications (2)

Publication Number Publication Date
DE69103778D1 DE69103778D1 (de) 1994-10-13
DE69103778T2 true DE69103778T2 (de) 1995-04-27

Family

ID=26343032

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69103778T Expired - Fee Related DE69103778T2 (de) 1990-01-19 1991-01-18 Magnetische Aufzeichnungsplatte.

Country Status (3)

Country Link
US (1) US5144512A (de)
EP (1) EP0438177B1 (de)
DE (1) DE69103778T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5210673A (en) * 1991-09-09 1993-05-11 Hitachi Metals, Ltd. Thin-film hard disk magnetic medium
US6075677A (en) * 1995-07-27 2000-06-13 Seagate Technology, Inc. Method for positioning a read/write head to reduce wear for proximity recording in a magnetic disk storage system
JPH09134515A (ja) * 1995-09-05 1997-05-20 Kao Corp 磁気記録媒体
JP2000067430A (ja) * 1998-08-19 2000-03-03 Fujitsu Ltd 磁気ディスク装置
US7301726B1 (en) * 2004-11-04 2007-11-27 Komag, Inc. Banded LZT CSS zone

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0785298B2 (ja) * 1985-08-23 1995-09-13 株式会社東芝 磁気記録媒体
US4735840A (en) * 1985-11-12 1988-04-05 Cyberdisk, Inc. Magnetic recording disk and sputtering process and apparatus for producing same
JPH01140616U (de) * 1988-03-16 1989-09-26
JPH0692263B2 (ja) * 1989-02-16 1994-11-16 伊藤忠商事株式会社 記録ディスク基板及びその製造方法

Also Published As

Publication number Publication date
DE69103778D1 (de) 1994-10-13
US5144512A (en) 1992-09-01
EP0438177A2 (de) 1991-07-24
EP0438177A3 (en) 1991-12-04
EP0438177B1 (de) 1994-09-07

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: PATENTANWAELTE MUELLER & HOFFMANN, 81667 MUENCHEN

8339 Ceased/non-payment of the annual fee