JP6680427B2 - 磁気記録媒体 - Google Patents

磁気記録媒体 Download PDF

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Publication number
JP6680427B2
JP6680427B2 JP2019572764A JP2019572764A JP6680427B2 JP 6680427 B2 JP6680427 B2 JP 6680427B2 JP 2019572764 A JP2019572764 A JP 2019572764A JP 2019572764 A JP2019572764 A JP 2019572764A JP 6680427 B2 JP6680427 B2 JP 6680427B2
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Japan
Prior art keywords
magnetic
recording medium
magnetic recording
less
layer
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JP2019572764A
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English (en)
Japanese (ja)
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JPWO2019187323A1 (ja
Inventor
潤 寺川
潤 寺川
山鹿　実
実 山鹿
前嶋　克紀
克紀 前嶋
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Sony Corp
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Sony Corp
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Publication of JPWO2019187323A1 publication Critical patent/JPWO2019187323A1/ja
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    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/78—Tape carriers
    • 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
    • G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
    • 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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/658—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing oxygen, e.g. molecular oxygen or magnetic oxide
    • 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
    • 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
    • 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
    • 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
    • G11B5/70678—Ferrites
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1201—Formatting, e.g. arrangement of data block or words on the record carriers on tapes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
    • G11B2020/1265—Control data, system data or management information, i.e. data used to access or process user data
    • G11B2020/1281—Servo information
    • 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
    • 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
    • G11B5/73917—Metallic substrates, i.e. elemental metal or metal alloy substrates
    • G11B5/73919—Aluminium or titanium elemental or alloy substrates

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Magnetic Record Carriers (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Digital Magnetic Recording (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Engineering & Computer Science (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Metallurgy (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Signal Processing (AREA)
  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)
JP2019572764A 2018-03-30 2018-11-19 磁気記録媒体 Active JP6680427B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2018070356 2018-03-30
JP2018070356 2018-03-30
PCT/JP2018/042738 WO2019187323A1 (ja) 2018-03-30 2018-11-19 磁気記録媒体

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2020027452A Division JP6729827B2 (ja) 2018-03-30 2020-02-20 磁気記録媒体

Publications (2)

Publication Number Publication Date
JP6680427B2 true JP6680427B2 (ja) 2020-04-15
JPWO2019187323A1 JPWO2019187323A1 (ja) 2020-04-30

Family

ID=68061056

Family Applications (11)

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JP2019572764A Active JP6680427B2 (ja) 2018-03-30 2018-11-19 磁気記録媒体
JP2019551405A Active JP6635240B1 (ja) 2018-03-30 2019-04-01 磁気記録媒体
JP2019550866A Active JP6635239B1 (ja) 2018-03-30 2019-04-01 磁気記録媒体
JP2019228317A Active JP6729783B2 (ja) 2018-03-30 2019-12-18 磁気記録媒体
JP2019228316A Active JP6729782B2 (ja) 2018-03-30 2019-12-18 磁気記録媒体
JP2020027452A Active JP6729827B2 (ja) 2018-03-30 2020-02-20 磁気記録媒体
JP2020100150A Active JP7180639B2 (ja) 2018-03-30 2020-06-09 磁気記録媒体
JP2020100148A Active JP6981503B2 (ja) 2018-03-30 2020-06-09 磁気記録媒体
JP2020100149A Active JP7283446B2 (ja) 2018-03-30 2020-06-09 磁気記録媒体
JP2021181300A Active JP7283516B2 (ja) 2018-03-30 2021-11-05 磁気記録媒体
JP2023080869A Active JP7559870B2 (ja) 2018-03-30 2023-05-16 磁気記録媒体

Family Applications After (10)

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JP2019551405A Active JP6635240B1 (ja) 2018-03-30 2019-04-01 磁気記録媒体
JP2019550866A Active JP6635239B1 (ja) 2018-03-30 2019-04-01 磁気記録媒体
JP2019228317A Active JP6729783B2 (ja) 2018-03-30 2019-12-18 磁気記録媒体
JP2019228316A Active JP6729782B2 (ja) 2018-03-30 2019-12-18 磁気記録媒体
JP2020027452A Active JP6729827B2 (ja) 2018-03-30 2020-02-20 磁気記録媒体
JP2020100150A Active JP7180639B2 (ja) 2018-03-30 2020-06-09 磁気記録媒体
JP2020100148A Active JP6981503B2 (ja) 2018-03-30 2020-06-09 磁気記録媒体
JP2020100149A Active JP7283446B2 (ja) 2018-03-30 2020-06-09 磁気記録媒体
JP2021181300A Active JP7283516B2 (ja) 2018-03-30 2021-11-05 磁気記録媒体
JP2023080869A Active JP7559870B2 (ja) 2018-03-30 2023-05-16 磁気記録媒体

Country Status (4)

Country Link
US (4) US11205455B2 (enExample)
JP (11) JP6680427B2 (enExample)
DE (3) DE112018007412T5 (enExample)
WO (3) WO2019187323A1 (enExample)

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JPWO2019187323A1 (ja) 2020-04-30
US11205455B2 (en) 2021-12-21
US20210020197A1 (en) 2021-01-21
JP2022010111A (ja) 2022-01-14
JP2020140761A (ja) 2020-09-03
JP7559870B2 (ja) 2024-10-02
JP7283446B2 (ja) 2023-05-30
JPWO2019189942A1 (ja) 2020-04-30
JP6981503B2 (ja) 2021-12-15
US11270729B2 (en) 2022-03-08
JP6635239B1 (ja) 2020-01-22
JP6729783B2 (ja) 2020-07-22
US10748570B2 (en) 2020-08-18
JPWO2019189941A1 (ja) 2020-04-30
JP6635240B1 (ja) 2020-01-22
JP2020144972A (ja) 2020-09-10
US11145328B2 (en) 2021-10-12
JP6729782B2 (ja) 2020-07-22
WO2019189941A1 (ja) 2019-10-03
JP7283516B2 (ja) 2023-05-30
US20200118589A1 (en) 2020-04-16
JP2020057447A (ja) 2020-04-09
JP2020144971A (ja) 2020-09-10
DE112018007412T5 (de) 2020-12-10
JP2020053110A (ja) 2020-04-02
WO2019189942A1 (ja) 2019-10-03
DE112019001720T5 (de) 2021-01-21
US20200372932A1 (en) 2020-11-26
JP6729827B2 (ja) 2020-07-22
JP2020109716A (ja) 2020-07-16
US20210012799A1 (en) 2021-01-14
JP7180639B2 (ja) 2022-11-30
JP2023101000A (ja) 2023-07-19
DE112019001737T5 (de) 2021-01-21
WO2019187323A1 (ja) 2019-10-03

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