DE3566849D1 - Perpendicular magnetic recording medium - Google Patents

Perpendicular magnetic recording medium

Info

Publication number
DE3566849D1
DE3566849D1 DE8585104338T DE3566849T DE3566849D1 DE 3566849 D1 DE3566849 D1 DE 3566849D1 DE 8585104338 T DE8585104338 T DE 8585104338T DE 3566849 T DE3566849 T DE 3566849T DE 3566849 D1 DE3566849 D1 DE 3566849D1
Authority
DE
Germany
Prior art keywords
recording medium
magnetic recording
perpendicular 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
DE8585104338T
Other languages
English (en)
Inventor
Masaaki Futamoto
Yukio Honda
Yasutaro Uesaka
Kazuetsu Yoshida
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.)
Hitachi Ltd
Maxell Holdings Ltd
Original Assignee
Hitachi Ltd
Hitachi Maxell 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=13444512&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3566849(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hitachi Ltd, Hitachi Maxell Ltd filed Critical Hitachi Ltd
Application granted granted Critical
Publication of DE3566849D1 publication Critical patent/DE3566849D1/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
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/656—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing Co
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
    • 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
    • G11B5/672—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 different compositions in a plurality of magnetic layers, e.g. layer compositions having differing elemental components or differing proportions of elements
    • 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
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
    • G11B5/7377—Physical structure of underlayer, e.g. texture
    • 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
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73911—Inorganic substrates
    • G11B5/73921—Glass or ceramic substrates
    • 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
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates
    • 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
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates
    • G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0026—Pulse recording
    • G11B2005/0029—Pulse recording using magnetisation components of the recording layer disposed mainly perpendicularly to the record carrier surface
    • 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
    • Y10T428/12—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.]
    • Y10T428/12674—Ge- or Si-base component

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Record Carriers (AREA)
DE8585104338T 1984-04-11 1985-04-10 Perpendicular magnetic recording medium Expired DE3566849D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59070888A JPH0618059B2 (ja) 1984-04-11 1984-04-11 垂直磁気記録媒体

Publications (1)

Publication Number Publication Date
DE3566849D1 true DE3566849D1 (en) 1989-01-19

Family

ID=13444512

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585104338T Expired DE3566849D1 (en) 1984-04-11 1985-04-10 Perpendicular magnetic recording medium

Country Status (5)

Country Link
US (1) US4707756A (de)
EP (1) EP0158338B2 (de)
JP (1) JPH0618059B2 (de)
KR (1) KR900006482B1 (de)
DE (1) DE3566849D1 (de)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677032A (en) * 1985-09-23 1987-06-30 International Business Machines Corporation Vertical magnetic recording media with multilayered magnetic film structure
JPS62208412A (ja) * 1986-03-07 1987-09-12 Hitachi Ltd 磁気記録媒体およびその製造方法
US4786553A (en) * 1986-03-28 1988-11-22 Hitachi, Ltd. Magnetic recording medium
US4847161A (en) * 1986-12-19 1989-07-11 Siemens Aktiengesellschaft Magnetically anisotropic recording medium
JP2791015B2 (ja) * 1986-12-24 1998-08-27 株式会社日立製作所 磁気記録媒体
DE3644823A1 (de) * 1986-12-31 1988-07-14 Basf Ag Magnetische aufzeichnungstraeger
US4786564A (en) * 1987-02-25 1988-11-22 Komag, Inc. Method for manufacturing a magnetic disk having reduced bit shift, minimized noise, increased resolution and uniform magnetic characteristics, and the resulting disk
JPS63237210A (ja) * 1987-03-25 1988-10-03 Sony Corp 磁気記録媒体
JP2579184B2 (ja) * 1987-03-30 1997-02-05 日立マクセル株式会社 磁気記録媒体
JPS6464114A (en) * 1987-09-03 1989-03-10 Ricoh Kk Magnetic recording medium
KR920001981B1 (ko) * 1987-10-09 1992-03-07 미쓰비시전기 주식회사 자기기록매체
US5060097A (en) * 1989-01-06 1991-10-22 Hitachi, Ltd. Magnetic disc file including a slider which exhibits reduced deformation during operation
DE69031250T2 (de) * 1989-06-09 1997-12-04 Matsushita Electric Ind Co Ltd Magnetisches Material
US5112699A (en) * 1990-03-12 1992-05-12 International Business Machines Corporation Metal-metal epitaxy on substrates and method of making
JPH0594611A (ja) * 1991-09-30 1993-04-16 Nec Corp 磁気記録媒体
JPH07141640A (ja) * 1993-11-17 1995-06-02 Matsushita Electric Ind Co Ltd 磁気記録媒体及びその製造方法
US5479097A (en) * 1993-12-29 1995-12-26 Storage Technology Corporation Data corruption detector for magnetic media
KR19980024169A (ko) * 1996-09-04 1998-07-06 가나이 츠토무 수직자기기록매체 및 그것을 사용한 자기기록 재생장치
US6403203B2 (en) 1997-05-29 2002-06-11 Hitachi, Ltd. Magnetic recording medium and magnetic recording apparatus using the same
US6183893B1 (en) 1998-04-06 2001-02-06 Hitachi, Ltd. Perpendicular magnetic recording medium and magnetic storage apparatus using the same
JP3220116B2 (ja) 1999-07-06 2001-10-22 株式会社日立製作所 垂直磁気記録媒体および磁気記憶装置
JP3665261B2 (ja) 2000-09-01 2005-06-29 株式会社日立製作所 垂直磁気記録媒体および磁気記憶装置
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
JP3625428B2 (ja) * 2001-03-12 2005-03-02 株式会社東芝 垂直磁気記録媒体
AU2003240813A1 (en) * 2002-09-30 2004-04-23 Seagate Technology Llc Intermediate layer for perpendicular magnetic recording media
CN108786839A (zh) * 2018-01-18 2018-11-13 合肥小小作为信息科技有限公司 一种催化剂用金属载体的制备方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1358761A (fr) * 1963-05-27 1964-04-17 Matériau magnétique en couches minces magnétiques et non magnétiques
JPS54145505A (en) * 1978-05-04 1979-11-13 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPS55163630A (en) * 1979-06-07 1980-12-19 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPS5634143A (en) * 1979-08-25 1981-04-06 Hitachi Maxell Ltd Magnetic recording medium
JPS5724022A (en) * 1980-07-16 1982-02-08 Toshiba Corp Production of magnetic recording substance
JPS5758226A (en) * 1980-09-22 1982-04-07 Toshiba Corp Magnetic recording medium
JPS57149706A (en) * 1981-03-12 1982-09-16 Tdk Corp Magnetic recording medium
JPS57173917A (en) * 1981-04-20 1982-10-26 Canon Inc Magnetic recording medium
JPS6063710A (ja) * 1983-09-19 1985-04-12 Hitachi Ltd 磁気ディスク媒体
US4661420A (en) * 1984-02-06 1987-04-28 Nihon Shinku Gijutsu Kabushiki Kaisha Optical magnetic recording member

Also Published As

Publication number Publication date
EP0158338A3 (en) 1987-01-14
JPH0618059B2 (ja) 1994-03-09
EP0158338B1 (de) 1988-12-14
KR900006482B1 (ko) 1990-09-01
JPS60214417A (ja) 1985-10-26
EP0158338B2 (de) 1993-02-24
US4707756A (en) 1987-11-17
KR850007504A (ko) 1985-12-04
EP0158338A2 (de) 1985-10-16

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings
8339 Ceased/non-payment of the annual fee