DE3375616D1 - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
DE3375616D1
DE3375616D1 DE8383105181T DE3375616T DE3375616D1 DE 3375616 D1 DE3375616 D1 DE 3375616D1 DE 8383105181 T DE8383105181 T DE 8383105181T DE 3375616 T DE3375616 T DE 3375616T DE 3375616 D1 DE3375616 D1 DE 3375616D1
Authority
DE
Germany
Prior art keywords
recording medium
magnetic recording
magnetic
medium
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.)
Expired
Application number
DE8383105181T
Other languages
English (en)
Inventor
Shozo Hideyama
Akio Ishizawa
Katuya Kumagai
Minoru Hashimoto
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
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 filed Critical Toshiba Corp
Application granted granted Critical
Publication of DE3375616D1 publication Critical patent/DE3375616D1/de
Expired 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
DE8383105181T 1982-05-25 1983-05-25 Magnetic recording medium Expired DE3375616D1 (en)

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 (1)

Publication Number Publication Date
DE3375616D1 true DE3375616D1 (en) 1988-03-10

Family

ID=13912366

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383105181T Expired DE3375616D1 (en) 1982-05-25 1983-05-25 Magnetic recording medium

Country Status (4)

Country Link
US (1) US4511617A (de)
EP (1) EP0095191B1 (de)
JP (1) JPS58205928A (de)
DE (1) DE3375616D1 (de)

Families Citing this family (42)

* 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
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
JP2611965B2 (ja) * 1983-12-13 1997-05-21 株式会社東芝 磁気記録媒体
JP2611964B2 (ja) * 1983-12-13 1997-05-21 株式会社東芝 磁気記録媒体
DE3474225D1 (en) * 1984-01-14 1988-10-27 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
JPH0658735B2 (ja) * 1984-12-26 1994-08-03 株式会社東芝 磁気記録媒体
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
JP2741018B2 (ja) * 1986-03-20 1998-04-15 日立マクセル株式会社 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
JPH02257425A (ja) * 1988-12-12 1990-10-18 Konica Corp 磁気記録媒体
US5026598A (en) * 1988-12-12 1991-06-25 Konica Corporation Magnetic recording medium
DE69010094T2 (de) * 1989-01-07 1994-11-03 Konishiroku Photo Ind Magnetisches speichermedium mit ausgeglichenen kennzeichen.
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
GB1079892A (en) * 1964-01-27 1967-08-16 Fuji Photo Film Co Ltd Improvements in or relating to magnetic recording elements
US3761311A (en) * 1971-08-23 1973-09-25 Minnesota Mining & Mfg Dual layer magnetic recording tape
JPS5014206A (de) * 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

Also Published As

Publication number Publication date
EP0095191B1 (de) 1988-02-03
JPS6250891B2 (de) 1987-10-27
EP0095191A3 (en) 1986-02-12
US4511617A (en) 1985-04-16
JPS58205928A (ja) 1983-12-01
EP0095191A2 (de) 1983-11-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee