GB2179486B - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
GB2179486B
GB2179486B GB8619797A GB8619797A GB2179486B GB 2179486 B GB2179486 B GB 2179486B GB 8619797 A GB8619797 A GB 8619797A GB 8619797 A GB8619797 A GB 8619797A GB 2179486 B GB2179486 B GB 2179486B
Authority
GB
United Kingdom
Prior art keywords
recording medium
magnetic recording
magnetic
medium
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
Application number
GB8619797A
Other versions
GB8619797D0 (en
GB2179486A (en
Inventor
Joichiro Ezaki
Yoshiaki Ito
Haruyuki Morita
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.)
TDK Corp
Original Assignee
TDK 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
Application filed by TDK Corp filed Critical TDK Corp
Publication of GB8619797D0 publication Critical patent/GB8619797D0/en
Publication of GB2179486A publication Critical patent/GB2179486A/en
Application granted granted Critical
Publication of GB2179486B publication Critical patent/GB2179486B/en
Expired 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
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73911—Inorganic substrates
    • G11B5/73921—Glass or ceramic substrates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Magnetic Record Carriers (AREA)
GB8619797A 1985-08-22 1986-08-14 Magnetic recording medium Expired GB2179486B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60183022A JPS6243819A (en) 1985-08-22 1985-08-22 Magnetic recording medium

Publications (3)

Publication Number Publication Date
GB8619797D0 GB8619797D0 (en) 1986-09-24
GB2179486A GB2179486A (en) 1987-03-04
GB2179486B true GB2179486B (en) 1989-11-15

Family

ID=16128367

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8619797A Expired GB2179486B (en) 1985-08-22 1986-08-14 Magnetic recording medium

Country Status (4)

Country Link
JP (1) JPS6243819A (en)
DE (1) DE3628225A1 (en)
FR (1) FR2586496A1 (en)
GB (1) GB2179486B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0256278A1 (en) * 1986-07-16 1988-02-24 Siemens Aktiengesellschaft Magnetic disc and process for its manufacture
DE3789932T2 (en) * 1986-10-09 1995-02-09 Asahi Glass Co Ltd Glass substrate for a magnetic disk and process for its manufacture.
JPH0695363B2 (en) * 1987-08-27 1994-11-24 ティーディーケイ株式会社 Magnetic recording / reproducing device
US4833556A (en) * 1987-12-22 1989-05-23 Eastman Kodak Company Low drag stabilizer device for stabilizing the interface between a transducer and a moving medium
US5268799A (en) * 1989-02-27 1993-12-07 Tdk Corporation Magnetic recording and reproducing apparatus
JPH03245322A (en) * 1989-03-29 1991-10-31 Asahi Glass Co Ltd Manufacture of glass substrate for magnetic disc
JP2840966B2 (en) * 1989-11-08 1998-12-24 ティーディーケイ株式会社 Magnetic recording medium and magnetic recording / reproducing method
US6236542B1 (en) 1994-01-21 2001-05-22 International Business Machines Corporation Substrate independent superpolishing process and slurry
JP3989988B2 (en) * 1996-09-04 2007-10-10 Ｈｏｙａ株式会社 Information recording medium substrate, magnetic disk, and manufacturing method thereof
US6120922A (en) * 1997-04-28 2000-09-19 Goto; Naoyuki Glass-ceramic substrate for a magnetic information storage medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167448A (en) * 1984-11-02 1986-05-29 Hitachi Ltd Perpendicular magnetic recording medium

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254189A (en) * 1979-07-05 1981-03-03 Memorex Corporation Disc having substrate, intermediate layer and magnetically sensitive layer wherein intermediate layer has melting point less than annealing temperature of substrate but higher than processing temperature of magnetically sensitive layer
JPS6035333A (en) * 1983-08-08 1985-02-23 Kao Corp Substrate for magnetic disk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167448A (en) * 1984-11-02 1986-05-29 Hitachi Ltd Perpendicular magnetic recording medium

Also Published As

Publication number Publication date
GB8619797D0 (en) 1986-09-24
FR2586496A1 (en) 1987-02-27
GB2179486A (en) 1987-03-04
JPS6243819A (en) 1987-02-25
DE3628225A1 (en) 1987-02-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930814