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DE602004009392D1 - Magnetisches Aufzeichnungsmittel - Google Patents

Magnetisches Aufzeichnungsmittel

Info

Publication number
DE602004009392D1
DE602004009392D1 DE602004009392T DE602004009392T DE602004009392D1 DE 602004009392 D1 DE602004009392 D1 DE 602004009392D1 DE 602004009392 T DE602004009392 T DE 602004009392T DE 602004009392 T DE602004009392 T DE 602004009392T DE 602004009392 D1 DE602004009392 D1 DE 602004009392D1
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 - Fee Related
Application number
DE602004009392T
Other languages
English (en)
Other versions
DE602004009392T2 (de
Inventor
Manfred Albrecht
Olav Hellwig
Guohan Hu
Bruce David Terris
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.)
HGST Netherlands BV
HGST Inc
Original Assignee
Hitachi Global Storage Technologies Netherlands BV
Hitachi Global Storage Technologies Inc
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 Hitachi Global Storage Technologies Netherlands BV, Hitachi Global Storage Technologies Inc filed Critical Hitachi Global Storage Technologies Netherlands BV
Publication of DE602004009392D1 publication Critical patent/DE602004009392D1/de
Application granted granted Critical
Publication of DE602004009392T2 publication Critical patent/DE602004009392T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B5/127—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
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
    • G11C11/5607—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using magnetic storage 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
    • G11B5/64—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
    • 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
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/743—Patterned record carriers, wherein the magnetic recording layer is patterned into magnetic isolated data islands, e.g. discrete tracks
    • G11B5/746—Bit Patterned record carriers, wherein each magnetic isolated data island corresponds to a bit
    • 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
    • G11B5/855—Coating only part of a support with a magnetic layer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
    • G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
    • G11C11/161—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect details concerning the memory cell structure, e.g. the layers of the ferromagnetic memory cell
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
    • G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
    • G11C11/165—Auxiliary circuits
    • G11C11/1675—Writing or programming circuits or methods
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Record Carriers (AREA)
  • Peptides Or Proteins (AREA)
  • Enzymes And Modification Thereof (AREA)
DE602004009392T 2003-12-03 2004-11-03 Magnetisches Aufzeichnungsmittel Expired - Fee Related DE602004009392T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US727826 2003-12-03
US10/727,826 US6947235B2 (en) 2003-12-03 2003-12-03 Patterned multilevel perpendicular magnetic recording media

Publications (2)

Publication Number Publication Date
DE602004009392D1 true DE602004009392D1 (de) 2007-11-22
DE602004009392T2 DE602004009392T2 (de) 2008-08-14

Family

ID=34523002

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602004009392T Expired - Fee Related DE602004009392T2 (de) 2003-12-03 2004-11-03 Magnetisches Aufzeichnungsmittel

Country Status (8)

Country Link
US (1) US6947235B2 (de)
EP (1) EP1542209B1 (de)
JP (1) JP2005166238A (de)
KR (1) KR20050053496A (de)
CN (1) CN100414609C (de)
DE (1) DE602004009392T2 (de)
SG (1) SG112073A1 (de)
TW (1) TW200521997A (de)

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US7324294B2 (en) * 2004-10-29 2008-01-29 Hitachi Global Storage Technologies Netherlands B.V. Magnetic recording disk drive with patterned media and circuit for generating timing pulses from the pattern
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US20080074786A1 (en) * 2006-09-21 2008-03-27 Canon Kabushiki Kaisha Magnetic recording medium and method of manufacturing the same
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US8771848B2 (en) * 2006-10-10 2014-07-08 Seagate Technology Llc Bit patterned magnetic media
US20080085424A1 (en) * 2006-10-10 2008-04-10 Seagate Technology Llc Single-pass recording of multilevel patterned media
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US7729074B2 (en) * 2007-06-28 2010-06-01 Seagate Technology Llc Zone based timing recovery for bit patterned media
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KR101390950B1 (ko) * 2007-11-23 2014-05-02 시게이트 테크놀로지 엘엘씨 자기 기록 미디어 및 그 제조방법
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US9183870B2 (en) 2007-12-07 2015-11-10 Wisconsin Alumni Research Foundation Density multiplication and improved lithography by directed block copolymer assembly
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US7867406B2 (en) * 2007-12-26 2011-01-11 Hitachi Global Storage Technologies Netherlands, B.V. Patterned magnetic media having an exchange bridge structure connecting islands
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US7852587B2 (en) * 2008-09-11 2010-12-14 Hitachi Global Storage Technologies Netherlands B.V. Thermal assisted recording (TAR) disk drive capable of controlling the write pulses
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Also Published As

Publication number Publication date
CN100414609C (zh) 2008-08-27
JP2005166238A (ja) 2005-06-23
EP1542209A1 (de) 2005-06-15
SG112073A1 (en) 2005-06-29
CN1624771A (zh) 2005-06-08
TW200521997A (en) 2005-07-01
KR20050053496A (ko) 2005-06-08
EP1542209B1 (de) 2007-10-10
US6947235B2 (en) 2005-09-20
US20050122609A1 (en) 2005-06-09
DE602004009392T2 (de) 2008-08-14

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8328 Change in the person/name/address of the agent

Representative=s name: PUSCHMANN & BORCHERT, 82041 OBERHACHING

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee