DE69213115T2 - Magnetischer Aufzeichnungsträger - Google Patents

Magnetischer Aufzeichnungsträger

Info

Publication number
DE69213115T2
DE69213115T2 DE69213115T DE69213115T DE69213115T2 DE 69213115 T2 DE69213115 T2 DE 69213115T2 DE 69213115 T DE69213115 T DE 69213115T DE 69213115 T DE69213115 T DE 69213115T DE 69213115 T2 DE69213115 T2 DE 69213115T2
Authority
DE
Germany
Prior art keywords
record carrier
magnetic record
magnetic
carrier
record
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
DE69213115T
Other languages
English (en)
Other versions
DE69213115D1 (de
DE69213115T3 (de
Inventor
Kiyomi Ejiri
Hiroo Inaba
Shinji Saito
Satoru Hayakawa
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.)
Fujifilm Corp
Original Assignee
Fuji Photo Film 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27520030&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69213115(T2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP3121873A external-priority patent/JP2623178B2/ja
Priority claimed from JP3121875A external-priority patent/JP2566070B2/ja
Priority claimed from JP1841692A external-priority patent/JP2623185B2/ja
Priority claimed from JP4021782A external-priority patent/JP2666810B2/ja
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of DE69213115D1 publication Critical patent/DE69213115D1/de
Publication of DE69213115T2 publication Critical patent/DE69213115T2/de
Application granted granted Critical
Publication of DE69213115T3 publication Critical patent/DE69213115T3/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/842—Coating a support with a liquid magnetic dispersion
    • 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
    • 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
    • G11B5/73—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
    • G11B5/733—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 characterised by the addition of non-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
    • G11B5/73—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
    • G11B5/733—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 characterised by the addition of non-magnetic particles
    • G11B5/7334—Base layer characterised by composition or structure
DE69213115T 1991-04-25 1992-04-24 Magnetische Aufzeichnungsträger Expired - Lifetime DE69213115T3 (de)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP3121873A JP2623178B2 (ja) 1991-04-25 1991-04-25 磁気記録媒体
JP121873/91 1991-04-25
JP121875/91 1991-04-25
JP3121875A JP2566070B2 (ja) 1991-04-25 1991-04-25 磁気記録媒体の製造方法
JP198309/91 1991-07-15
JP19830991 1991-07-15
JP1841692A JP2623185B2 (ja) 1992-01-08 1992-01-08 磁気記録媒体
JP18416/92 1992-01-08
JP4021782A JP2666810B2 (ja) 1991-07-15 1992-01-10 磁気記録媒体
JP21782/92 1992-01-10

Publications (3)

Publication Number Publication Date
DE69213115D1 DE69213115D1 (de) 1996-10-02
DE69213115T2 true DE69213115T2 (de) 1997-03-06
DE69213115T3 DE69213115T3 (de) 2005-05-19

Family

ID=27520030

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69213115T Expired - Lifetime DE69213115T3 (de) 1991-04-25 1992-04-24 Magnetische Aufzeichnungsträger

Country Status (3)

Country Link
EP (1) EP0520155B2 (de)
KR (1) KR100231920B1 (de)
DE (1) DE69213115T3 (de)

Families Citing this family (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG42857A1 (en) * 1991-10-14 1997-10-17 Ibm A method of servowriting a magnetic disk drive
EP0552611B2 (de) † 1992-01-08 2003-05-07 Fuji Photo Film Co., Ltd. Magnetischer Aufzeichnungsträger
JP2566096B2 (ja) † 1992-04-14 1996-12-25 富士写真フイルム株式会社 磁気記録媒体
JPH05347017A (ja) * 1992-04-14 1993-12-27 Konica Corp 磁気記録媒体
EP0566378B2 (de) † 1992-04-14 2001-05-09 Konica Corporation Magnetisches Aufzeichnungsmedium
JPH06236542A (ja) † 1993-02-08 1994-08-23 Minnesota Mining & Mfg Co <3M> 高記録密度磁気記録媒体
EP0691645B1 (de) * 1994-07-08 1999-09-29 Fuji Photo Film Co., Ltd. Magnetisches Aufzeichnungsmedium
JPH08241515A (ja) * 1995-03-03 1996-09-17 Tdk Corp 磁気記録媒体
DE19747068A1 (de) 1997-10-24 1999-04-29 Emtec Magnetics Gmbh Magnetischer Aufzeichnungsträger mit hoher Aufzeichnungsdichte und Verfahren zu seiner Herstellung
JP2001250219A (ja) 2000-03-07 2001-09-14 Fuji Photo Film Co Ltd 磁気記録媒体
DE10135957A1 (de) 2001-07-24 2003-02-13 Emtec Magnetics Gmbh Magnetisches Aufzeichnungsmedium
DE10153277A1 (de) * 2001-10-29 2003-05-08 Emtec Magnetics Gmbh Magnetisches Aufzeichnungsmedium
JP6756483B2 (ja) * 2015-01-19 2020-09-16 国立大学法人 東京大学 ε酸化鉄を含む配向体とその製造方法、並びに製造装置
JP6316248B2 (ja) 2015-08-21 2018-04-25 富士フイルム株式会社 磁気テープおよびその製造方法
JP6430927B2 (ja) 2015-12-25 2018-11-28 富士フイルム株式会社 磁気テープおよびその製造方法
JP6467366B2 (ja) 2016-02-29 2019-02-13 富士フイルム株式会社 磁気テープ
JP6474748B2 (ja) 2016-02-29 2019-02-27 富士フイルム株式会社 磁気テープ
JP6534637B2 (ja) 2016-06-13 2019-06-26 富士フイルム株式会社 磁気テープおよび磁気テープ装置
JP6585570B2 (ja) 2016-09-16 2019-10-02 富士フイルム株式会社 磁気記録媒体およびその製造方法
JP6684236B2 (ja) 2017-02-20 2020-04-22 富士フイルム株式会社 磁気テープ装置および磁気再生方法
JP6691512B2 (ja) 2017-06-23 2020-04-28 富士フイルム株式会社 磁気記録媒体
JP6707061B2 (ja) 2017-07-19 2020-06-10 富士フイルム株式会社 磁気記録媒体
JP6707060B2 (ja) 2017-07-19 2020-06-10 富士フイルム株式会社 磁気テープ
JP6678135B2 (ja) 2017-07-19 2020-04-08 富士フイルム株式会社 磁気記録媒体
JP6723203B2 (ja) 2017-07-19 2020-07-15 富士フイルム株式会社 磁気テープ
JP6717786B2 (ja) 2017-07-19 2020-07-08 富士フイルム株式会社 磁気テープおよび磁気テープ装置
US10839849B2 (en) 2017-07-19 2020-11-17 Fujifilm Corporation Magnetic recording medium having characterized magnetic layer
JP6717785B2 (ja) 2017-07-19 2020-07-08 富士フイルム株式会社 磁気記録媒体
JP6723202B2 (ja) 2017-07-19 2020-07-15 富士フイルム株式会社 磁気テープ
US10854230B2 (en) 2017-07-19 2020-12-01 Fujifilm Corporation Magnetic tape having characterized magnetic layer
US10854227B2 (en) 2017-07-19 2020-12-01 Fujifilm Corporation Magnetic recording medium having characterized magnetic layer
JP6714548B2 (ja) 2017-07-19 2020-06-24 富士フイルム株式会社 磁気テープおよび磁気テープ装置
US10854231B2 (en) 2017-09-29 2020-12-01 Fujifilm Corporation Magnetic recording medium having characterized magnetic layer and magnetic recording and reproducing device
US10854233B2 (en) 2017-09-29 2020-12-01 Fujifilm Corporation Magnetic recording medium having characterized magnetic layer and magnetic recording and reproducing device
JP6884874B2 (ja) 2017-09-29 2021-06-09 富士フイルム株式会社 磁気テープおよび磁気記録再生装置
US10978105B2 (en) 2017-09-29 2021-04-13 Fujifilm Corporation Magnetic recording medium having characterized magnetic layer and magnetic recording and reproducing device
US10854234B2 (en) 2017-09-29 2020-12-01 Fujifilm Corporation Magnetic recording medium having characterized magnetic layer and magnetic recording and reproducing device
WO2019065200A1 (ja) 2017-09-29 2019-04-04 富士フイルム株式会社 磁気テープおよび磁気記録再生装置
US11361793B2 (en) 2018-03-23 2022-06-14 Fujifilm Corporation Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device
US11514944B2 (en) 2018-03-23 2022-11-29 Fujifilm Corporation Magnetic tape and magnetic tape device
US11514943B2 (en) 2018-03-23 2022-11-29 Fujifilm Corporation Magnetic tape and magnetic tape device
US11361792B2 (en) 2018-03-23 2022-06-14 Fujifilm Corporation Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device
JP6932103B2 (ja) * 2018-03-29 2021-09-08 富士フイルム株式会社 磁気記録媒体、イプシロン型酸化鉄系化合物の粒子の製造方法、及び磁気記録媒体の製造方法
JP6830931B2 (ja) 2018-07-27 2021-02-17 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気テープ装置
JP6784738B2 (ja) 2018-10-22 2020-11-11 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気テープ装置
JP7042737B2 (ja) 2018-12-28 2022-03-28 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気テープ装置
JP6830945B2 (ja) 2018-12-28 2021-02-17 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気テープ装置
JP7003073B2 (ja) 2019-01-31 2022-01-20 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気テープ装置
JP6778804B1 (ja) 2019-09-17 2020-11-04 富士フイルム株式会社 磁気記録媒体および磁気記録再生装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE795896A (fr) † 1972-02-24 1973-08-23 Eastman Kodak Co Materiau pour l'enregistrement magnetique a plusieurs couches et son procede de preparation
JPS6236727A (ja) * 1985-08-09 1987-02-17 Fuji Electric Co Ltd 磁気記録媒体
JPH0677712B2 (ja) † 1986-09-30 1994-10-05 富士写真フイルム株式会社 塗布装置
JPH0693297B2 (ja) * 1987-01-30 1994-11-16 富士写真フイルム株式会社 磁気記録媒体
DE3888860T2 (de) † 1987-02-02 1994-08-04 Canon Kk Magnetischer Aufzeichnungsträger.
JPS63191315A (ja) † 1987-02-04 1988-08-08 Fuji Photo Film Co Ltd 磁気記録媒体
JPS63217526A (ja) * 1987-03-05 1988-09-09 Hitachi Ltd 磁気デイスク塗膜の製造方法
JPH0649171B2 (ja) † 1988-07-04 1994-06-29 富士写真フイルム株式会社 塗布方法
US5051291A (en) † 1989-01-17 1991-09-24 Konica Corporation Magnetic recording medium
US4994306A (en) † 1989-03-13 1991-02-19 Fuji Photo Film Co., Ltd. Method for applying plural liquids to continuously moving nonmagnetic carrier
DE69019220T3 (de) † 1989-03-28 2001-04-05 Konishiroku Photo Ind Magnetischer Aufzeichnungsträger mit verbesserter elektromagnetischer Umwandlungscharakteristik und Schutz gegen Umwelteinflüsse.
JP2893269B2 (ja) * 1989-04-11 1999-05-17 コニカ株式会社 磁気記録媒体
JPH0349030A (ja) † 1989-07-18 1991-03-01 Tdk Corp 磁気記録媒体およびその製造方法
US5069934A (en) † 1989-12-06 1991-12-03 Fuji Photo Film Co., Ltd. Process for producing multi-layered magnetic recording media

Also Published As

Publication number Publication date
DE69213115D1 (de) 1996-10-02
EP0520155B2 (de) 2004-10-27
EP0520155A2 (de) 1992-12-30
KR920020413A (ko) 1992-11-21
DE69213115T3 (de) 2005-05-19
EP0520155A3 (en) 1993-05-05
EP0520155B1 (de) 1996-08-28
KR100231920B1 (ko) 1999-12-01

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8328 Change in the person/name/address of the agent

Free format text: DERZEIT KEIN VERTRETER BESTELLT

8366 Restricted maintained after opposition proceedings
8327 Change in the person/name/address of the patent owner

Owner name: FUJIFILM CORP., TOKIO/TOKYO, JP

R071 Expiry of right

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