MY159844A - Method of producing glass blank for substrate of information recording medium, substrate for information recording medium, and information recording medium; and manufacturing apparatus for glass blank for subtrate of information recording medium - Google Patents

Method of producing glass blank for substrate of information recording medium, substrate for information recording medium, and information recording medium; and manufacturing apparatus for glass blank for subtrate of information recording medium

Info

Publication number
MY159844A
MY159844A MYPI2010004466A MYPI2010004466A MY159844A MY 159844 A MY159844 A MY 159844A MY PI2010004466 A MYPI2010004466 A MY PI2010004466A MY PI2010004466 A MYPI2010004466 A MY PI2010004466A MY 159844 A MY159844 A MY 159844A
Authority
MY
Malaysia
Prior art keywords
recording medium
information recording
substrate
glass material
glass blank
Prior art date
Application number
MYPI2010004466A
Inventor
Murakami Akira
Original Assignee
Hoya Corp
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 Corp filed Critical Hoya Corp
Publication of MY159844A publication Critical patent/MY159844A/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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Glass Compositions (AREA)

Abstract

A METHOD OF MANUFACTURING A GLASS BLANK (B) FOR A SUBSTRATE FOR AN INFORMATION RECORDING MEDIUM, THE METHOD INCLUDING STEPS OF: CUTTING OUT A GOB OF A GLASS MATERIAL FROM A MOLTEN GLASS MATERIAL BY CUTTING THE MOLTEN GLASS MATERIAL DISCHARGED FROM A GLASS MATERIAL OUTLET AT A PREDETERMINED TIMING; CAUSING THE GOB OF THE GLASS MATERIAL TO FALL DOWNWARDLY; PINCHING AND PRESSING THE GOB OF THE GLASS MATERIAL BY A PRESS UNIT (120, 130, 140, 150) HAVING A PAIR OF MOLDS (121, 122), THE MOLDS’ SURFACES FACING TO EACH OTHER BEING PRESS SURFACES WHICH ARE PLANES WITHOUT AN UNEVENNESS, SO AS TO CONTACT THE FALLING GOB OF THE GLASS MATERIAL ONLY TO THE PRESS SURFACES; AND FORMING A CIRCULAR FLAT PLATE-SHAPED GLASS BLANK HAVING A TARGET FLATNESS AS A GLASS SUBSTRATE FOR A MAGNETIC DISK SUCH THAT A RATIO BETWEEN A DIAMETER AND A THICKNESS OF THE GLASS BLANK IS WITHIN A RANGE OF FROM 50:1 TO 150:1, FROM THE GOB OF THE GLASS MATERIAL.
MYPI2010004466A 2009-09-30 2010-09-24 Method of producing glass blank for substrate of information recording medium, substrate for information recording medium, and information recording medium; and manufacturing apparatus for glass blank for subtrate of information recording medium MY159844A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009226671 2009-09-30
JP2010055101 2010-03-11

Publications (1)

Publication Number Publication Date
MY159844A true MY159844A (en) 2017-02-15

Family

ID=43883985

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2010004466A MY159844A (en) 2009-09-30 2010-09-24 Method of producing glass blank for substrate of information recording medium, substrate for information recording medium, and information recording medium; and manufacturing apparatus for glass blank for subtrate of information recording medium

Country Status (3)

Country Link
JP (2) JP5307094B2 (en)
CN (3) CN102030459B (en)
MY (1) MY159844A (en)

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US8806895B2 (en) * 2010-12-09 2014-08-19 Hoya Corporation Manufacturing method for a glass substrate for magnetic disk
JP2012160252A (en) 2011-01-31 2012-08-23 Hoya Corp Method for manufacturing glass substrate for magnetic disk
JPWO2013001841A1 (en) * 2011-06-30 2015-02-23 Hoya株式会社 Glass substrate for magnetic disk and manufacturing method thereof
CN104230164B (en) * 2013-06-21 2018-06-19 旭硝子株式会社 The manufacturing method and magnetic recording media of magnetic recording media
CN106746505A (en) * 2016-11-23 2017-05-31 合肥贺博教育科技有限公司 A kind of pyroceram disk circulation production device
US20190375668A1 (en) * 2017-02-28 2019-12-12 Corning Incorporated Glass article with reduced thickness variation, method for making and apparatus therefor
CN107635033A (en) * 2017-09-27 2018-01-26 北京小米移动软件有限公司 Processing technology, screen module and the electronic equipment of bend glass
CN110510861A (en) * 2019-07-24 2019-11-29 东莞泰升玻璃有限公司 A kind of drilling processing device of glass board material
CN112125512B (en) * 2020-10-10 2023-08-18 深圳市汇坤科技有限公司 Explosion-proof screen and application thereof in terminal for children

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JPH11189423A (en) * 1997-12-26 1999-07-13 Ngk Insulators Ltd Production of glass base plate
KR100462935B1 (en) * 1998-12-09 2004-12-23 호야 가부시키가이샤 Method and apparatus for press molding a glass product
JP4521129B2 (en) * 2000-03-13 2010-08-11 Ｈｏｙａ株式会社 Manufacturing method and apparatus for glass molded product, manufacturing method for glass substrate, information recording medium
JP2002003241A (en) * 2000-06-19 2002-01-09 Central Glass Co Ltd Glass for press molding and glass substrate for information recording media
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JP2003054965A (en) * 2001-08-08 2003-02-26 Minolta Co Ltd Method for press-molding glass and method for manufacturing glass substrate for hard disk using the same method
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JP4200422B2 (en) * 2002-07-26 2008-12-24 Ｈｏｙａ株式会社 Glass blank, information recording medium substrate, and information recording medium manufacturing method
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JP2007091500A (en) * 2005-09-27 2007-04-12 Hoya Corp Method of manufacturing glass formed body, method of manufacturing crystallized glass body, method of manufacturing magnetic disk substrate blank, method of manufacturing magnetic disk substrate and method for manufacturing magnetic disk
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Also Published As

Publication number Publication date
CN102030459A (en) 2011-04-27
JP2011207738A (en) 2011-10-20
CN111261199B (en) 2021-08-03
JP5425976B2 (en) 2014-02-26
JP5307094B2 (en) 2013-10-02
CN111261199A (en) 2020-06-09
CN106098086A (en) 2016-11-09
JP2012190541A (en) 2012-10-04
CN102030459B (en) 2016-05-18
CN106098086B (en) 2020-05-12

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