KR910700518A - 제특성 간의 균형이 잘 유지된 자기 기록 매체 - Google Patents

제특성 간의 균형이 잘 유지된 자기 기록 매체

Info

Publication number
KR910700518A
KR910700518A KR1019900701979A KR900701979A KR910700518A KR 910700518 A KR910700518 A KR 910700518A KR 1019900701979 A KR1019900701979 A KR 1019900701979A KR 900701979 A KR900701979 A KR 900701979A KR 910700518 A KR910700518 A KR 910700518A
Authority
KR
South Korea
Prior art keywords
magnetic
magnetic layer
magnetic recording
magnetic material
well
Prior art date
Application number
KR1019900701979A
Other languages
English (en)
Other versions
KR0182267B1 (ko
Inventor
야스시 나까노
세이찌 도비사와
노보루 고야마
Original Assignee
이데 메구미
코니카 가부시끼가이샤
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 이데 메구미, 코니카 가부시끼가이샤 filed Critical 이데 메구미
Publication of KR910700518A publication Critical patent/KR910700518A/ko
Application granted granted Critical
Publication of KR0182267B1 publication Critical patent/KR0182267B1/ko

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
    • G11B5/714—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 the dimension of the magnetic particles
    • 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
    • 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
    • G11B5/706—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 the composition of the magnetic material
    • G11B5/70626—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 the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—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 the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70652—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 the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
    • G11B5/70668—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 the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant
    • G11B5/70673—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 the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant containing Co
    • 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
    • G11B5/708—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 addition of non-magnetic particles to the layer

Landscapes

  • Paints Or Removers (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

내용 없음.

Description

제특성 간의 균형이 잘 유지된 자기 기록 매체
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (3)

  1. 비자성 지지체와, 그 위에 BET방식으로 25 내지 40㎡/g의 비표면적 및 600 내지 750 오르스테드(Oe)의 항자력(Hc)을 갖는 Co-함유 τ-산화철 자성 물질, 상기 자성 물질의 0.05 내지 0.3중량%의 실리콘 및 상기 자성 물질의 7 내지 13중량%의 카아본 블랙을 함유하는 제1자성층 및 상기 제1자성층 위에, BET방식으로 25 내지 70㎡/g의 비표면적 및 750 내지 9500오르스테드(Oe)의 항자력을 갖는 Co-함유 τ-산화철 자성 물질이 자성 물질의 1중량% 이하의 카아본 블랙을 함유하는 제2자성층으로 구성된 자기 기록 매체.
  2. 제1항에 있어서, 상기 제1자성층이 인산 에스테르를 함유하는 것이 특징인 자기 기록 매체.
  3. 제1항 또는 제2항 중 어느 한 항에 있어서, 상기 제1자성층 및 제2자성층이 각각 음이온 관능기를 갖는 폴리염화비닐을 함유하는 것이 특징인 자기 기록 매체.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019900701979A 1989-01-07 1990-01-08 균형이 잘 유지된 특성을 갖는 자기 기록 매체 KR0182267B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1524/1989 1989-01-07
JP152489 1989-01-07
JP1524/89 1989-01-07
PCT/JP1990/000012 WO1990007775A1 (en) 1989-01-07 1990-01-08 Magnetic recording medium having balanced characteristics

Publications (2)

Publication Number Publication Date
KR910700518A true KR910700518A (ko) 1991-03-15
KR0182267B1 KR0182267B1 (ko) 1999-05-01

Family

ID=11503899

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900701979A KR0182267B1 (ko) 1989-01-07 1990-01-08 균형이 잘 유지된 특성을 갖는 자기 기록 매체

Country Status (5)

Country Link
EP (1) EP0408762B1 (ko)
KR (1) KR0182267B1 (ko)
AU (1) AU619644B2 (ko)
DE (1) DE69010094T2 (ko)
WO (1) WO1990007775A1 (ko)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS578228A (en) * 1980-06-17 1982-01-16 Ube Ind Ltd Etching of polyamide molding
JPS58118544U (ja) * 1982-02-03 1983-08-12 東京磁気印刷株式会社 磁気記録媒体
JPS58200425A (ja) * 1982-05-18 1983-11-22 Matsushita Electric Ind Co Ltd 磁気記録媒体
JPS58205928A (ja) * 1982-05-25 1983-12-01 Toshiba Corp 磁気記録媒体
JPS59231732A (ja) * 1983-06-13 1984-12-26 Matsushita Electric Ind Co Ltd 磁気記録媒体
JPS61110340A (ja) * 1984-10-31 1986-05-28 Fuji Photo Film Co Ltd 磁気記録媒体の製造方法
JPS63259826A (ja) * 1987-04-16 1988-10-26 Fuji Photo Film Co Ltd 磁気記録媒体
JPH0775066B2 (ja) * 1987-05-29 1995-08-09 富士写真フイルム株式会社 磁気記録媒体

Also Published As

Publication number Publication date
EP0408762A1 (en) 1991-01-23
KR0182267B1 (ko) 1999-05-01
AU619644B2 (en) 1992-01-30
EP0408762B1 (en) 1994-06-22
AU4830490A (en) 1990-08-01
WO1990007775A1 (en) 1990-07-12
DE69010094T2 (de) 1994-11-03
DE69010094D1 (de) 1994-07-28
EP0408762A4 (en) 1991-12-11

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