JPS58205928A - 磁気記録媒体 - Google Patents

磁気記録媒体

Info

Publication number
JPS58205928A
JPS58205928A JP57087348A JP8734882A JPS58205928A JP S58205928 A JPS58205928 A JP S58205928A JP 57087348 A JP57087348 A JP 57087348A JP 8734882 A JP8734882 A JP 8734882A JP S58205928 A JPS58205928 A JP S58205928A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic layer
recording medium
layer
magnetic 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.)
Granted
Application number
JP57087348A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6250891B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
Akizo Hideyama
日出山　章蔵
Akio Ishizawa
石沢　昭男
Katsuya Kumagai
熊谷　勝哉
Minoru Hashimoto
稔 橋本
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP57087348A priority Critical patent/JPS58205928A/ja
Priority to US06/497,280 priority patent/US4511617A/en
Priority to DE8383105181T priority patent/DE3375616D1/de
Priority to EP83105181A priority patent/EP0095191B1/en
Publication of JPS58205928A publication Critical patent/JPS58205928A/ja
Publication of JPS6250891B2 publication Critical patent/JPS6250891B2/ja
Granted 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
    • 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
    • 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
    • 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
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • 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
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer
    • 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]
    • Y10T428/31507—Of polycarbonate

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Hard Magnetic Materials (AREA)
JP57087348A 1982-05-25 1982-05-25 磁気記録媒体 Granted JPS58205928A (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP57087348A JPS58205928A (ja) 1982-05-25 1982-05-25 磁気記録媒体
US06/497,280 US4511617A (en) 1982-05-25 1983-05-23 Magnetic recording medium
DE8383105181T DE3375616D1 (en) 1982-05-25 1983-05-25 Magnetic recording medium
EP83105181A EP0095191B1 (en) 1982-05-25 1983-05-25 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57087348A JPS58205928A (ja) 1982-05-25 1982-05-25 磁気記録媒体

Publications (2)

Publication Number Publication Date
JPS58205928A true JPS58205928A (ja) 1983-12-01
JPS6250891B2 JPS6250891B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1987-10-27

Family

ID=13912366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57087348A Granted JPS58205928A (ja) 1982-05-25 1982-05-25 磁気記録媒体

Country Status (4)

Country Link
US (1) US4511617A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0095191B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS58205928A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3375616D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5994231A (ja) * 1982-11-22 1984-05-30 Fuji Photo Film Co Ltd 磁気記録体
JPS60125927A (ja) * 1983-12-13 1985-07-05 Toshiba Corp 磁気記録媒体
JPS60125926A (ja) * 1983-12-13 1985-07-05 Toshiba Corp 磁気記録媒体
JPS61151834A (ja) * 1984-12-26 1986-07-10 Toshiba Corp 磁気記録媒体
JPS62219331A (ja) * 1986-03-20 1987-09-26 Hitachi Maxell Ltd 磁気記録媒体の製造方法
WO1990007775A1 (en) * 1989-01-07 1990-07-12 Konica Corporation Magnetic recording medium having balanced characteristics
JPH02257425A (ja) * 1988-12-12 1990-10-18 Konica Corp 磁気記録媒体

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038723A (ja) * 1983-08-09 1985-02-28 Tdk Corp 磁気記録媒体
JPS60109021A (ja) * 1983-11-17 1985-06-14 Hitachi Maxell Ltd 磁気記録媒体
JPS60119625A (ja) * 1983-12-01 1985-06-27 Fuji Photo Film Co Ltd 磁気記録媒体
EP0150498B1 (en) * 1984-01-14 1988-09-21 Bayer Ag Perpendicular magnetic recording medium
JPH0624062B2 (ja) * 1984-04-06 1994-03-30 日立マクセル株式会社 磁気記録媒体
JPS60223018A (ja) * 1984-04-18 1985-11-07 Fuji Photo Film Co Ltd 磁気記録媒体
JPH0630142B2 (ja) * 1984-04-23 1994-04-20 富士写真フイルム株式会社 ディスク状磁気記録媒体
JPS60229227A (ja) * 1984-04-27 1985-11-14 Fuji Photo Film Co Ltd 磁気記録媒体
US4699771A (en) * 1984-05-14 1987-10-13 Kabushiki Kaisha Toshiba Magnetic recording powder, method of manufacturing thereof and application thereof
JPH0719363B2 (ja) * 1984-11-30 1995-03-06 日立マクセル株式会社 磁気記録媒体
US4714654A (en) * 1984-12-20 1987-12-22 Kabushiki Kaisha Toshiba Magnetic recording medium
JP2500934B2 (ja) * 1985-03-27 1996-05-29 ティーディーケイ株式会社 磁気記録媒体
JPH0760511B2 (ja) * 1985-06-26 1995-06-28 株式会社東芝 高耐久性磁気記録媒体
JPH0760512B2 (ja) * 1985-06-26 1995-06-28 富士写真フイルム株式会社 磁気記録媒体
US4701372A (en) * 1985-09-18 1987-10-20 Toyo Boseki Kabushiki Kaisha Magnetic recording medium
GB2181445B (en) * 1985-10-09 1989-11-08 Tdk Corp Magnetic recording medium
JPS62192041A (ja) * 1986-02-19 1987-08-22 Hitachi Ltd 光記録円板
US4743490A (en) * 1986-02-24 1988-05-10 Minnesota Mining And Manufacturing Company Counterfeit-resistant magnetic recording tape
JPH0719360B2 (ja) * 1986-03-13 1995-03-06 富士写真フイルム株式会社 磁気記録媒体
US4772522A (en) * 1986-07-21 1988-09-20 Tdk Corporation Magnetic recording medium
US4781852A (en) * 1986-10-24 1988-11-01 Olin Corporation Process for making selected doped barium and strontium hexaferrite particles
US4828916A (en) * 1986-12-27 1989-05-09 Toda Kogyo Corporation Plate-like magnetoplumbite type ferrite particles for magnetic recording and magnetic recording media using the same
JPS63171418A (ja) * 1987-01-09 1988-07-15 Hitachi Maxell Ltd 磁気記録媒体
JPS63261529A (ja) * 1987-04-20 1988-10-28 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
JPH0770047B2 (ja) * 1987-07-06 1995-07-31 富士写真フイルム株式会社 磁気記録媒体
JP2581583B2 (ja) * 1988-02-12 1997-02-12 富士写真フイルム株式会社 磁気記録媒体
JP2819029B2 (ja) * 1988-09-19 1998-10-30 コニカ株式会社 磁気記録媒体
US5026598A (en) * 1988-12-12 1991-06-25 Konica Corporation Magnetic recording medium
JPH05135353A (ja) * 1991-05-20 1993-06-01 Toshiba Corp 磁気記録媒体
JPH04361252A (ja) * 1991-06-10 1992-12-14 Konica Corp 情報記録媒体
US5700594A (en) * 1995-02-09 1997-12-23 Eastman Kodak Company Magnetic medium capable of supporting both longitudinal and perpendicular recording, and method of making same
US6338896B1 (en) * 1998-03-27 2002-01-15 Fuji Photo Film Co., Ltd. Magnetic recording medium
US6194058B1 (en) 1998-07-31 2001-02-27 Quantegy, Inc. Multi-layer magnetic recording medium, method and system of manufacture
GB2521191B (en) 2013-12-12 2016-09-21 Exmet Ab Magnetic materials and methods for their manufacture

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023166A (en) * 1956-08-18 1962-02-27 Philips Corp Magnetic record carrier
US3185775A (en) * 1958-03-10 1965-05-25 Iit Res Inst Oriented tape
US3423233A (en) * 1964-01-27 1969-01-21 Fuji Photo Film Co Ltd Magnetic recording element
US3761311A (en) * 1971-08-23 1973-09-25 Minnesota Mining & Mfg Dual layer magnetic recording tape
JPS5014206A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1973-06-07 1975-02-14
JPS5816248B2 (ja) * 1975-11-05 1983-03-30 富士写真フイルム株式会社 シンキナジキキロクタイ
DE2641578C2 (de) * 1976-09-13 1985-07-11 Minnesota Mining And Manufacturing Co., Saint Paul, Minn. Magnetisches Aufzeichnungsmedium einer ersten und einer zweiten Art magnetischer Aufzeichnungsteilchen
JPS5419712A (en) * 1977-07-13 1979-02-14 Tdk Corp Magnetic recording medium
US4275113A (en) * 1978-10-17 1981-06-23 Hitachi Maxell, Ltd. Magnetic recording medium
JPS6044807B2 (ja) * 1980-02-06 1985-10-05 松下電器産業株式会社 磁性プラスチック成形体の製造法
JPS5798134A (en) * 1980-12-11 1982-06-18 Fuji Photo Film Co Ltd Magnetic recording body
JPS57195329A (en) * 1981-05-26 1982-12-01 Fuji Photo Film Co Ltd Magnetic recording medium

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5994231A (ja) * 1982-11-22 1984-05-30 Fuji Photo Film Co Ltd 磁気記録体
JPS60125927A (ja) * 1983-12-13 1985-07-05 Toshiba Corp 磁気記録媒体
JPS60125926A (ja) * 1983-12-13 1985-07-05 Toshiba Corp 磁気記録媒体
JPS61151834A (ja) * 1984-12-26 1986-07-10 Toshiba Corp 磁気記録媒体
JPS62219331A (ja) * 1986-03-20 1987-09-26 Hitachi Maxell Ltd 磁気記録媒体の製造方法
JPH02257425A (ja) * 1988-12-12 1990-10-18 Konica Corp 磁気記録媒体
WO1990007775A1 (en) * 1989-01-07 1990-07-12 Konica Corporation Magnetic recording medium having balanced characteristics
AU619644B2 (en) * 1989-01-07 1992-01-30 Konica Corporation Magnetic recording medium

Also Published As

Publication number Publication date
EP0095191A3 (en) 1986-02-12
EP0095191A2 (en) 1983-11-30
EP0095191B1 (en) 1988-02-03
DE3375616D1 (en) 1988-03-10
US4511617A (en) 1985-04-16
JPS6250891B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1987-10-27

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