GB2343988A - Disk and drive system and methods with carbon overcoat for load/unload applications - Google Patents

Disk and drive system and methods with carbon overcoat for load/unload applications

Info

Publication number
GB2343988A
GB2343988A GB0002267A GB0002267A GB2343988A GB 2343988 A GB2343988 A GB 2343988A GB 0002267 A GB0002267 A GB 0002267A GB 0002267 A GB0002267 A GB 0002267A GB 2343988 A GB2343988 A GB 2343988A
Authority
GB
United Kingdom
Prior art keywords
platter
overcoat layer
load
disk
methods
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.)
Granted
Application number
GB0002267A
Other versions
GB0002267D0 (en
GB2343988B (en
Inventor
Zine-Eddine Boutaghou
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.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
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 Seagate Technology LLC filed Critical Seagate Technology LLC
Publication of GB0002267D0 publication Critical patent/GB0002267D0/en
Publication of GB2343988A publication Critical patent/GB2343988A/en
Application granted granted Critical
Publication of GB2343988B publication Critical patent/GB2343988B/en
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
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
    • G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
    • 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
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • G11B5/727—Inorganic carbon protective coating, e.g. graphite, diamond like carbon or doped carbon
    • 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
    • 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
    • G11B5/82—Disk carriers
    • 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
    • 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
    • G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/12—Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0057—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture
    • G11B23/0064—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture mediums or carriers characterised by the selection of the material
    • G11B23/0071—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture mediums or carriers characterised by the selection of the material additional layers for lubrication or wear protection

Abstract

A data recording platter (102) having an overcoat layer and a method for making the overcoat layer for the data recording platter involving forming the overcoat layer with an increase thickness at the load region (116) of the platter. The increased thickness portion of the overcoat layer may be disposed at the outer periphery (200) of the platter. The thickness may be increased gradually from a central position (202) of the platter toward the outer peripheral edge of the platter. The increased thickness of the overcoat provides added protection of the recording layer of the platter against, for example, collisions of a recording head (112) with the platter surface during loading and/or unloading movements of the head.
GB0002267A 1997-08-18 1998-05-22 Disk and drive system and methods with carbon overcoat for load/unload applications Expired - Fee Related GB2343988B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5591397P 1997-08-18 1997-08-18
PCT/US1998/009901 WO1999009548A1 (en) 1997-08-18 1998-05-22 Disk and drive system and methods with carbon overcoat for load/unload applications

Publications (3)

Publication Number Publication Date
GB0002267D0 GB0002267D0 (en) 2000-03-22
GB2343988A true GB2343988A (en) 2000-05-24
GB2343988B GB2343988B (en) 2002-01-09

Family

ID=22000976

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0002267A Expired - Fee Related GB2343988B (en) 1997-08-18 1998-05-22 Disk and drive system and methods with carbon overcoat for load/unload applications

Country Status (4)

Country Link
JP (1) JP2001516115A (en)
KR (1) KR20010023016A (en)
GB (1) GB2343988B (en)
WO (1) WO1999009548A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007265549A (en) * 2006-03-29 2007-10-11 Hoya Corp Magnetic recording disk and its manufacturing method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4529659A (en) * 1983-11-05 1985-07-16 Nippon Telegraph & Telephone Public Corporation Magnetic recording member and process for manufacturing the same
US4601950A (en) * 1984-09-10 1986-07-22 Shin-Etsu Chemical Co., Ltd. Magnetic recording medium and manufacturing method thereof
US5324593A (en) * 1992-02-18 1994-06-28 Hmt Technology Corporation Thin film medium with layered film gradient
US5462784A (en) * 1994-11-02 1995-10-31 International Business Machines Corporation Fluorinated diamond-like carbon protective coating for magnetic recording media devices
US5520981A (en) * 1995-04-24 1996-05-28 Hmt Technology Corporation Magnetic recording disk with overcoat thickness gradient between a data zone and a landing zone

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5202863A (en) * 1990-09-11 1993-04-13 Matsushita Electric Industrial Co., Ltd. Magneto-optical disk unit compatible with different two types of magneto-optical disks and a magnetic-field generator suitable thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4529659A (en) * 1983-11-05 1985-07-16 Nippon Telegraph & Telephone Public Corporation Magnetic recording member and process for manufacturing the same
US4601950A (en) * 1984-09-10 1986-07-22 Shin-Etsu Chemical Co., Ltd. Magnetic recording medium and manufacturing method thereof
US5324593A (en) * 1992-02-18 1994-06-28 Hmt Technology Corporation Thin film medium with layered film gradient
US5462784A (en) * 1994-11-02 1995-10-31 International Business Machines Corporation Fluorinated diamond-like carbon protective coating for magnetic recording media devices
US5520981A (en) * 1995-04-24 1996-05-28 Hmt Technology Corporation Magnetic recording disk with overcoat thickness gradient between a data zone and a landing zone

Also Published As

Publication number Publication date
KR20010023016A (en) 2001-03-26
WO1999009548A1 (en) 1999-02-25
JP2001516115A (en) 2001-09-25
GB0002267D0 (en) 2000-03-22
GB2343988B (en) 2002-01-09

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060522