KR900015075A - 자기기록 매체 - Google Patents

자기기록 매체 Download PDF

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Publication number
KR900015075A
KR900015075A KR1019900004094A KR900004094A KR900015075A KR 900015075 A KR900015075 A KR 900015075A KR 1019900004094 A KR1019900004094 A KR 1019900004094A KR 900004094 A KR900004094 A KR 900004094A KR 900015075 A KR900015075 A KR 900015075A
Authority
KR
South Korea
Prior art keywords
magnetic layer
group
magnetic
atom
medium
Prior art date
Application number
KR1019900004094A
Other languages
English (en)
Other versions
KR0155992B1 (ko
Inventor
세쓰꼬 가와하라
야스시 나까노
노보루 고야마
마사히로 우메무라
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
Priority claimed from JP1077448A external-priority patent/JPH02254625A/ja
Priority claimed from JP1079083A external-priority patent/JPH02260123A/ja
Application filed by 이데 메구미, 코니카 가부시끼가이샤 filed Critical 이데 메구미
Publication of KR900015075A publication Critical patent/KR900015075A/ko
Application granted granted Critical
Publication of KR0155992B1 publication Critical patent/KR0155992B1/ko

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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
    • 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
    • G11B5/702—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 bonding agent
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y10T428/257—Iron oxide or aluminum oxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31609—Particulate metal or metal compound-containing

Landscapes

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

Abstract

내용 없음.

Description

자기기록 매체
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (14)

  1. (1)지지체와 (2)상기 지지체의 한 측면상에 제공된 적어도 2개의 자성층으로 구성되고, 이 자성층은 (a)종횡비 3 내지 8 미만의 자성 입자들을 함유하는 자성층 A와 (b) 종횡비 8 내지 12의 자성 입자들을 함유하는 자성층 B로 구성되는 것을 특징으로 하는 자기 기록 매체.
  2. 제1항에 있어서, 상기 자성층 A가 상기 자성층들 중 상기 지지체에서 가장 먼 위치에 배열되는 것을 특징으로 하는 매체.
  3. 제2항에 있어서, 상기 자성층 B가 상기 자성층들 중 상기 지지체에 가장 근접한 위치에 배열되는 것을 특징으로 하는 매체.
  4. 제2항에 있어서, 상기 자성층 A가 -SO3M기, -OSO2M기, -COOM기 및기 (여기서, M은 수소원자 리듐원자 또는 나트륨 원자이고, M1및 M2각각은 수소 원자, 리듐 원자, 칼륨 원자, 나트륨 원자 또는 알킬기임)로 이루어지는 군 중에서 선택된 관능기를 갖는 변성 중합체를 함유하는 것을 특징으로 하는 매체.
  5. 제4항에 있어서, 상기 변성 중합체가 상기 관능기를 갖는 변성 폴리염화비닐인 것을 특징으로 하는 매체.
  6. 제4항에 있어서, 상기 변성 중합체가 상기 관능기를 갖는 변성 폴리우레탄인 것을 특징으로 하는 매체.
  7. 제4항에 있어서, 상기 자성층 B가 상기 변성 중합체인 것을 특징으로 하는 매체.
  8. 제1항에 있어서, 상기 자성층 B가 상기 자성층 중 상기 지지체에서 가장 먼 위치에 배열되는 것을 특징으로 하는 매체.
  9. 제8항에 있어서, 상기 자성층 B가 상기 자성층 B에 인접하여 배열되는 것을 특징으로 하는 매체.
  10. 제8항에 있어서, 상기 자성층 B중에 함유된 자성 입자들이 비표면적 50-70m2/g의 BET값을 가지며, 상기 자성층 A중에 함유된 자성 입자들이 비표면적 40-50m2/g의 BET값을 갖는 것을 특징으로 하는 매체.
  11. 제8항에 있어서, 상기 자성층 B가 -SO3M기, -OSO2M기, -COOM기 및기(여기서, M은 수소원자, 리튬원자 또는 나트륨 원자이고, M1및 M2각각은 수소 원자, 리튬 원자, 칼륨 원자, 나트륨 원자 또는 알킬기임)로 이루어지는 군 중에서 선택된 관능기를 갖는 변성 중합체를 함유하는 것을 특징으로 하는 매체.
  12. 제11항에 있어서, 상기 변성 중합체가 상기 관능기를 갖는 변성 폴리염화비닐인 것을 특징으로 하는 매체.
  13. 제11항에 있어서, 상기 변성 중합체가 상기 관능기를 갖는 변성 폴리우레탄인 것을 특징으로 하는 매체.
  14. 제11항에 있어서, 상기 자성층 A가 상기 변성 중합체를 함유하는 것을 특징으로 하는 매체.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019900004094A 1989-03-28 1990-03-27 자기 기록 매체 KR0155992B1 (ko)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP77448/1989 1989-03-28
JP1077448A JPH02254625A (ja) 1989-03-28 1989-03-28 磁気記録媒体
JP77448 1989-03-28
JP79083/89 1989-03-30
JP79083/1989 1989-03-30
JP1079083A JPH02260123A (ja) 1989-03-30 1989-03-30 磁気記録媒体

Publications (2)

Publication Number Publication Date
KR900015075A true KR900015075A (ko) 1990-10-25
KR0155992B1 KR0155992B1 (ko) 1998-12-15

Family

ID=26418523

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900004094A KR0155992B1 (ko) 1989-03-28 1990-03-27 자기 기록 매체

Country Status (4)

Country Link
US (1) US5093192A (ko)
EP (1) EP0389994B2 (ko)
KR (1) KR0155992B1 (ko)
DE (1) DE69005495T3 (ko)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69027074T2 (de) * 1989-08-29 1996-11-14 Konishiroku Photo Ind Magnetischer Aufzeichnungsträger
US5645917A (en) * 1991-04-25 1997-07-08 Fuji Photo Film Co., Ltd. Magnetic recording medium
US5827600A (en) * 1991-01-21 1998-10-27 Fuji Photo Film Co., Ltd. Magnetic recording medium
EP0626678B1 (en) * 1993-03-22 1998-09-30 Union Carbide Chemicals & Plastics Technology Corporation Magnetic recording media
US6579592B1 (en) 1996-11-29 2003-06-17 Fuji Photo Film Co., Ltd Magnetic recording tape with controlled Hc and magnetic flux/unit area value and controlled Cl/Fe intensity
KR20010029493A (ko) 1997-02-10 2001-04-06 무네유키 가코우 자기기록매체
US6432503B2 (en) 1997-03-31 2002-08-13 Fuji Photo Film Co., Ltd. Magnetic recording medium
EP0889464B1 (en) 1997-06-30 2003-09-03 Fuji Photo Film Co., Ltd. Magnetic recording medium
US6096406A (en) * 1997-07-15 2000-08-01 Fuji Photo Film Co., Ltd. Magnetic recording medium
JPH11185240A (ja) 1997-10-14 1999-07-09 Fuji Photo Film Co Ltd 磁気記録媒体
US6444290B1 (en) 1998-06-11 2002-09-03 Fuji Photo Film Co., Ltd. Magnetic recording medium comprising a support containing a specific size filler and having a specific concentration of surface protrusions
JP2000011352A (ja) 1998-06-22 2000-01-14 Fuji Photo Film Co Ltd 磁気記録媒体
US8298611B2 (en) * 2008-07-23 2012-10-30 Seagate Technology Llc Discrete track media

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5798134A (en) * 1980-12-11 1982-06-18 Fuji Photo Film Co Ltd Magnetic recording body
JPS595424A (ja) * 1982-07-01 1984-01-12 Sony Corp 磁気記録媒体
JPS59172144A (ja) * 1983-03-20 1984-09-28 Hitachi Maxell Ltd 磁気記録媒体
JPS59172142A (ja) * 1983-03-20 1984-09-28 Hitachi Maxell Ltd 磁気記録媒体
JPH0624062B2 (ja) * 1984-04-06 1994-03-30 日立マクセル株式会社 磁気記録媒体
JPS61214223A (ja) * 1985-03-20 1986-09-24 Hitachi Maxell Ltd 磁気記録媒体
JPH0727631B2 (ja) * 1987-09-21 1995-03-29 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
EP0389994B1 (en) 1993-12-29
KR0155992B1 (ko) 1998-12-15
EP0389994A3 (en) 1991-06-12
EP0389994B2 (en) 1997-03-05
DE69005495T2 (de) 1994-04-21
EP0389994A2 (en) 1990-10-03
DE69005495D1 (de) 1994-02-10
US5093192A (en) 1992-03-03
DE69005495T3 (de) 1997-10-09

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