JPH0312374B2 - - Google Patents

Info

Publication number
JPH0312374B2
JPH0312374B2 JP57004356A JP435682A JPH0312374B2 JP H0312374 B2 JPH0312374 B2 JP H0312374B2 JP 57004356 A JP57004356 A JP 57004356A JP 435682 A JP435682 A JP 435682A JP H0312374 B2 JPH0312374 B2 JP H0312374B2
Authority
JP
Japan
Prior art keywords
magnetic
tape
squareness ratio
magnetic layer
shaped
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 - Lifetime
Application number
JP57004356A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58122623A (ja
Inventor
Ryoji Nakabachi
Naoko Kawamura
Nobuyuki Nihei
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.)
Sony Corp
Original Assignee
Sony 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11582113&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPH0312374(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP57004356A priority Critical patent/JPS58122623A/ja
Priority to EP83900280A priority patent/EP0098307B1/en
Priority to PCT/JP1983/000007 priority patent/WO1983002520A1/ja
Priority to NL8320004A priority patent/NL8320004A/nl
Priority to GB08323733A priority patent/GB2124926B/en
Priority to DE3328016T priority patent/DE3328016C2/de
Priority to US06/535,011 priority patent/US4788092A/en
Publication of JPS58122623A publication Critical patent/JPS58122623A/ja
Publication of JPH0312374B2 publication Critical patent/JPH0312374B2/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
    • 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

Landscapes

  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
JP57004356A 1982-01-14 1982-01-14 円盤状磁気記録媒体 Granted JPS58122623A (ja)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP57004356A JPS58122623A (ja) 1982-01-14 1982-01-14 円盤状磁気記録媒体
EP83900280A EP0098307B1 (en) 1982-01-14 1983-01-10 Disc-shaped magnetic recording medium
PCT/JP1983/000007 WO1983002520A1 (fr) 1982-01-14 1983-01-10 Support d'enregistrement magnetique en forme de disque
NL8320004A NL8320004A (nl) 1982-01-14 1983-01-10 Schijfvormig magnetisch registreermedium.
GB08323733A GB2124926B (en) 1982-01-14 1983-01-10 Disc-shaped magnetic recording medium
DE3328016T DE3328016C2 (de) 1982-01-14 1983-01-10 Plattenförmiges magnetisches Aufzeichnungsmedium
US06/535,011 US4788092A (en) 1982-01-14 1983-01-10 Disc-shaped magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57004356A JPS58122623A (ja) 1982-01-14 1982-01-14 円盤状磁気記録媒体

Publications (2)

Publication Number Publication Date
JPS58122623A JPS58122623A (ja) 1983-07-21
JPH0312374B2 true JPH0312374B2 (en, 2012) 1991-02-20

Family

ID=11582113

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57004356A Granted JPS58122623A (ja) 1982-01-14 1982-01-14 円盤状磁気記録媒体

Country Status (7)

Country Link
US (1) US4788092A (en, 2012)
EP (1) EP0098307B1 (en, 2012)
JP (1) JPS58122623A (en, 2012)
DE (1) DE3328016C2 (en, 2012)
GB (1) GB2124926B (en, 2012)
NL (1) NL8320004A (en, 2012)
WO (1) WO1983002520A1 (en, 2012)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6057526A (ja) * 1983-09-08 1985-04-03 Fuji Photo Film Co Ltd 磁気記録媒体
JPS6057527A (ja) * 1983-09-08 1985-04-03 Fuji Photo Film Co Ltd 磁気記録媒体
JPH0628106B2 (ja) * 1984-02-15 1994-04-13 日立マクセル株式会社 磁気デイスク
JPH0618063B2 (ja) * 1984-09-19 1994-03-09 日立マクセル株式会社 磁気デイスク
JP2669456B2 (ja) * 1984-09-19 1997-10-27 日立マクセル株式会社 磁気記録再生装置
JPS61194628A (ja) * 1985-02-23 1986-08-29 Victor Co Of Japan Ltd 磁気記録媒体
JPH0766526B2 (ja) * 1985-06-17 1995-07-19 富士写真フイルム株式会社 磁気記録媒体
JP2610851B2 (ja) * 1986-03-10 1997-05-14 ティーディーケイ株式会社 磁気記録媒体およびその製造方法
JPH01211226A (ja) * 1988-02-17 1989-08-24 Hitachi Maxell Ltd 磁気ディスク
JP2655379B2 (ja) * 1992-04-02 1997-09-17 富士写真フイルム株式会社 磁気記録ディスク

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1010568A (en) * 1972-02-03 1977-05-17 Arvin Industries Magnetic recording disc having circularly oriented magnetic particles and method of making same
US3865627A (en) * 1972-05-22 1975-02-11 Minnesota Mining & Mfg Magnetic recording medium incorporating fine acicular iron-based particles
DE2556188C3 (de) * 1975-12-13 1979-07-05 Basf Ag, 6700 Ludwigshafen Flexible Mehrschichtmagnetogrammträger
JPS6011446B2 (ja) * 1976-07-15 1985-03-26 日立マクセル株式会社 強磁性金属粉末の製造法
JPS5370397A (en) * 1976-12-06 1978-06-22 Fuji Photo Film Co Ltd Strongly magnetic metallic powder, preparation of same and magneticrecording media emplying same
US4208447A (en) * 1978-06-05 1980-06-17 International Business Machines Corporation Method for disorienting magnetic particles
JPS5853689B2 (ja) * 1979-01-20 1983-11-30 戸田工業株式会社 針状晶金属鉄磁性粒子粉末の製造法
JPS56156934A (en) * 1980-05-08 1981-12-03 Yoshiro Nakamatsu Uneven orientation recording medium
JPS57150129A (en) * 1981-03-12 1982-09-16 Fuji Photo Film Co Ltd Magnetic recording medium
JPS57154618A (en) * 1981-03-19 1982-09-24 Sony Corp Magnetic recording medium
JPS586525A (ja) * 1981-07-02 1983-01-14 Toshiba Corp 磁気記録媒体
JPS5817539A (ja) * 1981-07-21 1983-02-01 Sony Corp 磁気記録媒体
JPS58119609A (ja) * 1982-01-11 1983-07-16 Fuji Photo Film Co Ltd 磁気記録媒体

Also Published As

Publication number Publication date
DE3328016C2 (de) 1995-11-16
GB2124926B (en) 1985-07-03
WO1983002520A1 (fr) 1983-07-21
US4788092A (en) 1988-11-29
EP0098307B1 (en) 1988-05-04
GB8323733D0 (en) 1983-10-05
NL8320004A (nl) 1983-12-01
EP0098307A4 (fr) 1986-06-11
GB2124926A (en) 1984-02-29
JPS58122623A (ja) 1983-07-21
EP0098307A1 (en) 1984-01-18
DE3328016T1 (de) 1984-01-12

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