WO2009041492A1 - Method for manufacturing glass substrate for magnetic disc and method for manufacturing magnetic disc - Google Patents

Method for manufacturing glass substrate for magnetic disc and method for manufacturing magnetic disc Download PDF

Info

Publication number
WO2009041492A1
WO2009041492A1 PCT/JP2008/067289 JP2008067289W WO2009041492A1 WO 2009041492 A1 WO2009041492 A1 WO 2009041492A1 JP 2008067289 W JP2008067289 W JP 2008067289W WO 2009041492 A1 WO2009041492 A1 WO 2009041492A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic disc
manufacturing
glass substrate
glass plate
mirror
Prior art date
Application number
PCT/JP2008/067289
Other languages
French (fr)
Japanese (ja)
Inventor
Fumihiko Shigeta
Hironori Yoshikawa
Takemi Miyamoto
Masanori Tamaki
Hiroshi Tsuchiya
Original Assignee
Hoya Corporation
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 Hoya Corporation filed Critical Hoya Corporation
Publication of WO2009041492A1 publication Critical patent/WO2009041492A1/en

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
    • G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
    • B24B7/24—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain for grinding or polishing glass
    • B24B7/241—Methods
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C19/00—Surface treatment of glass, not in the form of fibres or filaments, by mechanical means

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

Provided is a method for manufacturing a glass substrate. In the method, a mirror glass plate (3) having a mirror surface as a main surface is processed to obtain required planarity and surface roughness by using a diamond sheet (10), i.e., fixed abrasive grains. As preprocessing, the surface of the mirror glass plate (3) is roughened by mechanical method or a chemical method to a degree where polishing by the diamond sheet (10) is effective. Then, by using the diamond sheet (10), the surface of the mirror glass plate (3) is processed to obtain desired board thickness and planarity.
PCT/JP2008/067289 2007-09-27 2008-09-25 Method for manufacturing glass substrate for magnetic disc and method for manufacturing magnetic disc WO2009041492A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007252013 2007-09-27
JP2007-252013 2007-09-27
JP2007255370 2007-09-28
JP2007-255370 2007-09-28

Publications (1)

Publication Number Publication Date
WO2009041492A1 true WO2009041492A1 (en) 2009-04-02

Family

ID=40511375

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/067289 WO2009041492A1 (en) 2007-09-27 2008-09-25 Method for manufacturing glass substrate for magnetic disc and method for manufacturing magnetic disc

Country Status (2)

Country Link
SG (1) SG186602A1 (en)
WO (1) WO2009041492A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012029857A1 (en) * 2010-08-31 2012-03-08 Hoya株式会社 Method for producing glass substrate for magnetic disks, and method for producing magnetic disk
JP2012151411A (en) * 2011-01-21 2012-08-09 Disco Abrasive Syst Ltd Grinding method of hard substrate

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003055001A (en) * 2001-08-08 2003-02-26 Minolta Co Ltd Method of manufacturing glass substrate for hard disk having central hole
JP2005141852A (en) * 2003-11-07 2005-06-02 Hoya Corp Manufacturing method for glass substrate for magnetic disk, and manufacturing method for magnetic disk

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003055001A (en) * 2001-08-08 2003-02-26 Minolta Co Ltd Method of manufacturing glass substrate for hard disk having central hole
JP2005141852A (en) * 2003-11-07 2005-06-02 Hoya Corp Manufacturing method for glass substrate for magnetic disk, and manufacturing method for magnetic disk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012029857A1 (en) * 2010-08-31 2012-03-08 Hoya株式会社 Method for producing glass substrate for magnetic disks, and method for producing magnetic disk
JP2012151411A (en) * 2011-01-21 2012-08-09 Disco Abrasive Syst Ltd Grinding method of hard substrate

Also Published As

Publication number Publication date
SG186602A1 (en) 2013-01-30

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