DE3478360D1 - Vertical magnetic recording medium - Google Patents

Vertical magnetic recording medium

Info

Publication number
DE3478360D1
DE3478360D1 DE8484308447T DE3478360T DE3478360D1 DE 3478360 D1 DE3478360 D1 DE 3478360D1 DE 8484308447 T DE8484308447 T DE 8484308447T DE 3478360 T DE3478360 T DE 3478360T DE 3478360 D1 DE3478360 D1 DE 3478360D1
Authority
DE
Germany
Prior art keywords
recording medium
magnetic recording
vertical magnetic
vertical
medium
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
DE8484308447T
Other languages
English (en)
Inventor
Ryuji Sugita
Kazuyoshi Honda
Hiroshi Nishida
Kyoji Noda
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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
Priority claimed from JP23384183A external-priority patent/JPS60125919A/ja
Priority claimed from JP25109383A external-priority patent/JPS60140525A/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of DE3478360D1 publication Critical patent/DE3478360D1/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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/676—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
    • G11B5/678—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer having three or more magnetic layers
    • 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
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/928—Magnetic property
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12632—Four or more distinct components with alternate recurrence of each type component
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12931—Co-, Fe-, or Ni-base components, alternative to each other
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12937—Co- or Ni-base component next to Fe-base component
DE8484308447T 1983-12-12 1984-12-05 Vertical magnetic recording medium Expired DE3478360D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP23384183A JPS60125919A (ja) 1983-12-12 1983-12-12 垂直磁気記録媒体
JP25109383A JPS60140525A (ja) 1983-12-27 1983-12-27 垂直記録用磁気記録媒体

Publications (1)

Publication Number Publication Date
DE3478360D1 true DE3478360D1 (en) 1989-06-29

Family

ID=26531226

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484308447T Expired DE3478360D1 (en) 1983-12-12 1984-12-05 Vertical magnetic recording medium

Country Status (3)

Country Link
US (1) US4687712A (de)
EP (1) EP0145446B1 (de)
DE (1) DE3478360D1 (de)

Families Citing this family (42)

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FR2584847B1 (fr) * 1985-07-15 1987-10-16 Bull Sa Support d'enregistrement perpendiculaire magnetiquement anisotrope
US4897318A (en) * 1986-01-21 1990-01-30 Matsushita Electric Industrial Co., Ltd. Laminated magnetic materials
JP2533860B2 (ja) * 1986-09-24 1996-09-11 株式会社日立製作所 磁性超格子膜およびそれを用いた磁気ヘツド
US4935311A (en) * 1987-04-13 1990-06-19 Hitachi, Ltd. Magnetic multilayered film and magnetic head using the same
US5176965A (en) * 1987-10-05 1993-01-05 Digital Equipment Corporation Magnetic medium for longitudinal recording
US6938825B1 (en) 1989-04-24 2005-09-06 Ultracard, Inc. Data system
US5576099A (en) * 1990-02-09 1996-11-19 International Business Machines Corporation Inductive head lamination with layer of magnetic quenching material
JP3483895B2 (ja) * 1990-11-01 2004-01-06 株式会社東芝 磁気抵抗効果膜
US5906880A (en) * 1990-11-30 1999-05-25 Sony Corporation Magnetic recording medium
US5369356A (en) * 1991-08-30 1994-11-29 Siemens Energy & Automation, Inc. Distributed current and voltage sampling function for an electric power monitoring unit
US5851643A (en) * 1993-11-11 1998-12-22 Hitachi, Ltd. Magnetic recording media and magnetic recording read-back system which uses such media
US5759681A (en) * 1995-02-03 1998-06-02 Hitachi, Ltd. Magnetic recording medium and magnetic recording system using the same
EP0780833A3 (de) * 1995-12-20 1999-01-07 Ampex Corporation Verbessertes Magnetaufzeichnungssystem mit sättigbarer Schichte und gebrauchmachend von MR-Elementen
US5830590A (en) * 1996-06-28 1998-11-03 Ampex Corporation Magnetic storage and reproducing system with a low permeability keeper and a self-biased magnetoresistive reproduce head
US5861220A (en) * 1996-08-06 1999-01-19 Ampex Corporation Method and apparatus for providing a magnetic storage and reproducing media with a keeper layer having a longitudinal anisotropy
US5843565A (en) * 1996-10-31 1998-12-01 Ampex Corporation Particulate magnetic medium utilizing keeper technology and methods of manufacture
US6871787B1 (en) 1998-07-10 2005-03-29 Ultracard, Inc. Data storage card having a glass substrate and data surface region and method for using same
JP3434476B2 (ja) * 1999-09-29 2003-08-11 秋田県 高密度情報記録媒体及びその媒体の製造方法
US7036739B1 (en) 1999-10-23 2006-05-02 Ultracard, Inc. Data storage device apparatus and method for using same
US7487908B1 (en) 1999-10-23 2009-02-10 Ultracard, Inc. Article having an embedded accessible storage member, apparatus and method for using same
US8397998B1 (en) 1999-10-23 2013-03-19 Ultracard, Inc. Data storage device, apparatus and method for using same
JP3731640B2 (ja) * 1999-11-26 2006-01-05 株式会社日立グローバルストレージテクノロジーズ 垂直磁気記録媒体及び磁気記憶装置
JP3350512B2 (ja) * 2000-05-23 2002-11-25 株式会社日立製作所 垂直磁気記録媒体及び磁気記録再生装置
SG91343A1 (en) * 2000-07-19 2002-09-17 Toshiba Kk Perpendicular magnetic recording medium and magnetic recording apparatus
US6818330B2 (en) * 2000-08-25 2004-11-16 Seagate Technology Llc Perpendicular recording medium with antiferromagnetic exchange coupling in soft magnetic underlayers
US6753072B1 (en) 2000-09-05 2004-06-22 Seagate Technology Llc Multilayer-based magnetic media with hard ferromagnetic, anti-ferromagnetic, and soft ferromagnetic layers
US6969006B1 (en) 2000-09-15 2005-11-29 Ultracard, Inc. Rotable portable card having a data storage device, apparatus and method for using same
US6641935B1 (en) * 2000-11-20 2003-11-04 Seagate Technology Llc Perpendicular recording media with soft magnetic superlattice underlayer
US20070111035A1 (en) * 2000-12-28 2007-05-17 Showa Denko K.K. Magnetic recording medium, method of producing the same and magnetic recording and reproducing device
US7166375B2 (en) * 2000-12-28 2007-01-23 Showa Denko K.K. Magnetic recording medium utilizing a multi-layered soft magnetic underlayer, method of producing the same and magnetic recording and reproducing device
US6833975B2 (en) * 2001-08-08 2004-12-21 Matsushita Electric Industrial Co., Ltd. Perpendicular magnetic recording medium and apparatus including a soft magnetic layer, an at least 20 nm thick non-magnetic layer, and a 50-90 nm gap length
US6777113B2 (en) * 2001-08-14 2004-08-17 Seagate Technology Llc Multilayer films for optimized soft underlayer magnetic properties of dual layer perpendicular recording media
WO2003021610A1 (fr) * 2001-08-31 2003-03-13 Tdk Corporation Element stratifie constitue d'un materiau magnetique doux, feuille constituee d'un materiau magnetique doux et procede de production dudit element stratifie
EP1460627A4 (de) * 2001-12-25 2006-07-26 Fujitsu Ltd Optisches magnetisches aufzeichnungsmedium
KR100803201B1 (ko) * 2002-07-27 2008-02-14 삼성전자주식회사 수직자기기록매체
AU2002361111A1 (en) * 2002-12-26 2004-07-29 Fujitsu Limited Perpendicular magnetic recording medium
DE60313206T2 (de) * 2003-02-20 2007-07-19 Fujitsu Ltd., Kawasaki Vertikal-magnetaufzeichnungsmedium
US7033685B2 (en) * 2003-10-07 2006-04-25 Seagate Technology Llc High coercivity perpendicular magnetic recording media on polymer substrates
JP2006012250A (ja) * 2004-06-23 2006-01-12 Tdk Corp 垂直磁気記録用磁気ヘッド
US7989095B2 (en) * 2004-12-28 2011-08-02 General Electric Company Magnetic layer with nanodispersoids having a bimodal distribution
KR100773546B1 (ko) * 2006-03-09 2007-11-07 삼성전자주식회사 자기 기록 매체
CN108022751B (zh) * 2016-10-31 2022-01-11 北京北方华创微电子装备有限公司 磁性薄膜叠层的沉积方法、磁性薄膜叠层及微电感器件

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350180A (en) * 1967-10-31 Magnetic device with alternating lami- na of magnetic material and non-mag- netic metal on a substrate
BE632673A (de) *
US3479156A (en) * 1966-10-20 1969-11-18 Burton Silverplating Co Multilayer magnetic coating
FR1511664A (fr) * 1966-12-23 1968-02-02 Commissariat Energie Atomique Couches minces à fort champ coercitif
US4103315A (en) * 1977-06-24 1978-07-25 International Business Machines Corporation Antiferromagnetic-ferromagnetic exchange bias films
JPS5737721A (en) * 1980-08-20 1982-03-02 Seiko Epson Corp Magnetic recording medium
JPS5758226A (en) * 1980-09-22 1982-04-07 Toshiba Corp Magnetic recording medium
JPS58114329A (ja) * 1981-12-26 1983-07-07 Seiko Epson Corp 磁気記録媒体
US4477488A (en) * 1982-03-16 1984-10-16 Matsushita Electric Industrial Co., Ltd. Method of manufacturing magnetic recording medium
US4621030A (en) * 1982-07-19 1986-11-04 Hitachi, Ltd. Perpendicular magnetic recording medium and manufacturing method thereof
JPS5933630A (ja) * 1982-08-19 1984-02-23 Matsushita Electric Ind Co Ltd 磁気記録媒体の製造方法
JPS59119531A (ja) * 1982-12-25 1984-07-10 Tdk Corp 磁気記録媒体
JPS6029927A (ja) * 1983-07-28 1985-02-15 Matsushita Electric Ind Co Ltd 垂直磁気記録媒体

Also Published As

Publication number Publication date
US4687712A (en) 1987-08-18
EP0145446A3 (en) 1986-12-17
EP0145446A2 (de) 1985-06-19
EP0145446B1 (de) 1989-05-24

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