AU5506899A - Magnetic recording support with high recording density - Google Patents

Magnetic recording support with high recording density

Info

Publication number
AU5506899A
AU5506899A AU55068/99A AU5506899A AU5506899A AU 5506899 A AU5506899 A AU 5506899A AU 55068/99 A AU55068/99 A AU 55068/99A AU 5506899 A AU5506899 A AU 5506899A AU 5506899 A AU5506899 A AU 5506899A
Authority
AU
Australia
Prior art keywords
recording
support
bottom layer
density
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
AU55068/99A
Other versions
AU756079B2 (en
Inventor
Peter Heilmann
Erich Hoffmann
Andreas Ilmer
Helmut Jakusch
Ria Kress
Werner Lenz
Ronald Veitch
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.)
Emtec Magnetics GmbH
Original Assignee
Emtec Magnetics GmbH
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 Emtec Magnetics GmbH filed Critical Emtec Magnetics GmbH
Publication of AU5506899A publication Critical patent/AU5506899A/en
Application granted granted Critical
Publication of AU756079B2 publication Critical patent/AU756079B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/716—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by two or more magnetic layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers

Landscapes

  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)

Abstract

Digital recording procedures wherein the recording support is not exposed to an obliterating magnetic field before recording are known in recent times. Such recording supports must therefore have good rewrite capability. It has been found that said requirement is fulfilled by two-layered recording supports, wherein the top layer contains a metal or metal alloy powder and has a density of less than 0.3 mu m and wherein the bottom layer contains a magnetic pigment. The coercitive force of the bottom layer has at the most two thirds the coercitive force of the top layer and the remanent magnetization of the bottom layer is at least 32 kA/m.
AU55068/99A 1998-08-26 1999-07-24 Magnetic recording support with high recording density Ceased AU756079B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19838799 1998-08-26
DE19838799A DE19838799A1 (en) 1998-08-26 1998-08-26 Magnetic recording medium with high recording density
PCT/EP1999/005309 WO2000013176A1 (en) 1998-08-26 1999-07-24 Magnetic recording support with high recording density

Publications (2)

Publication Number Publication Date
AU5506899A true AU5506899A (en) 2000-03-21
AU756079B2 AU756079B2 (en) 2003-01-02

Family

ID=7878788

Family Applications (1)

Application Number Title Priority Date Filing Date
AU55068/99A Ceased AU756079B2 (en) 1998-08-26 1999-07-24 Magnetic recording support with high recording density

Country Status (10)

Country Link
EP (1) EP1153388B1 (en)
JP (1) JP2002524811A (en)
KR (1) KR20010072987A (en)
CN (1) CN1312939A (en)
AT (1) ATE236446T1 (en)
AU (1) AU756079B2 (en)
BR (1) BR9913471A (en)
DE (2) DE19838799A1 (en)
HK (1) HK1038824A1 (en)
WO (1) WO2000013176A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001023145A (en) * 1999-07-05 2001-01-26 Sony Corp Magnetic recording medium
DE10017490A1 (en) 2000-04-07 2001-10-11 Emtec Magnetics Gmbh Magnetic recording medium used in the production of magnetic tapes, floppy disks or magnetic cards comprises an upper magnetic recording layer containing a fine magnetic pigment

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817539A (en) * 1981-07-21 1983-02-01 Sony Corp Magnetic recording medium
US4992330A (en) * 1988-12-12 1991-02-12 Konica Corporation Magnetic recording medium
EP0390391B2 (en) * 1989-03-28 2000-12-20 Konica Corporation A magnetic recording medium with improved electromagnetic conversion characteristics and anti-environment properties
JPH04313811A (en) * 1990-12-12 1992-11-05 Konica Corp Magnetic recording medium
JPH04251434A (en) * 1990-12-28 1992-09-07 Konica Corp Magnetic recording medium
JP2566096B2 (en) * 1992-04-14 1996-12-25 富士写真フイルム株式会社 Magnetic recording media
US5455104A (en) * 1992-12-02 1995-10-03 Konica Corporation Magnetic recording medium
JP3547022B2 (en) * 1994-12-16 2004-07-28 富士写真フイルム株式会社 Magnetic recording media
DE19747068A1 (en) * 1997-10-24 1999-04-29 Emtec Magnetics Gmbh High density magnetic recording medium and method of making the same

Also Published As

Publication number Publication date
AU756079B2 (en) 2003-01-02
JP2002524811A (en) 2002-08-06
HK1038824A1 (en) 2002-03-28
DE59904894D1 (en) 2003-05-08
BR9913471A (en) 2001-06-05
CN1312939A (en) 2001-09-12
EP1153388A1 (en) 2001-11-14
EP1153388B1 (en) 2003-04-02
ATE236446T1 (en) 2003-04-15
WO2000013176A1 (en) 2000-03-09
DE19838799A1 (en) 2000-03-02
KR20010072987A (en) 2001-07-31

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Legal Events

Date Code Title Description
FGA Letters patent sealed or granted (standard patent)