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MY156912A - Glass blank, glass blank manufacturing method, manufacturing method for substrate for information recording medium, and manufacturing method for information recording medium - Google Patents

Glass blank, glass blank manufacturing method, manufacturing method for substrate for information recording medium, and manufacturing method for information recording medium

Info

Publication number
MY156912A
MY156912A MYPI2012000978A MYPI2012000978A MY156912A MY 156912 A MY156912 A MY 156912A MY PI2012000978 A MYPI2012000978 A MY PI2012000978A MY PI2012000978 A MYPI2012000978 A MY PI2012000978A MY 156912 A MY156912 A MY 156912A
Authority
MY
Malaysia
Prior art keywords
manufacturing
glass blank
recording medium
information recording
substrate
Prior art date
Application number
MYPI2012000978A
Inventor
Nagakura Katsuya
Koguchi Katsuyoshi
Suzuki Osamu
Hayashi Tomonari
Osakabe Kinobu
Isono Hideki
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 MY156912A publication Critical patent/MY156912A/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
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C03B11/088—Flat discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

TO SECURE EXCELLENT FLATNESS WHEN A SUBSTRATE FOR AN INFORMATION RECORDING MEDIUM (102) IS MANUFACTURED USING A GLASS BLANK (1, 100, 100H, 100C), AND SUPPRESS OCCURRENCE OF A DEPRESSED TRACK (114P, 114Q) EVEN IF THE GLASS BLANK (1, 100, 100H, 100C) IS THINNED TO REDUCE A PROCESSING AMOUNT OF THE GLASS BLANK (1, 100, 100H, 100C), PROVIDED IS A GLASS BLANK (1, 100, 100H, 100C), INCLUDING: A THIN PORTION (10, 110) HAVING A DISC SHAPE; AND A THIN PORTION (12, 112) PROVIDED ALONG A PERIPHERAL PORTION OF THE THIN PORTION (10, 110) SO AS TO FORM A PROJECTING PORTION (12U, 12D, 112U, 112D) AT EACH OF BOTH SURFACES OF THE THIN PORTION (10, 110), IN WHICH A RADIAL WIDTH (W1) OF THE PROJECTING PORTION (12D) ON ONE SURFACE SIDE IS LARGER IN A DIAMETER DIRECTION OF THE THIN PORTION (10, 110) THAN A RADIAL WIDTH (W2) OF THE PROJECTING PORTION (12U) ON ANOTHER SURFACES SIDE. FURTHER PROVIDED ARE A GLASS BLANK (1, 100, 100H, 100C) MANUFACTURING METHOD, A MANUFACTURING METHOD FOR A SUBSTRATE FOR AN INFORMATION RECORDING MEDIUM (102) USING THE GLASS BLANK (1, 100, 100H, 100C), AND A MANUFACTURING METHOD FOR AN INFORMATION RECORDING MEDIUM USING GLASS BLANK (1, 100, 100H, 100C). THE MOST ILLUSTRATIVE DRAWING IS
MYPI2012000978A 2009-09-16 2010-09-14 Glass blank, glass blank manufacturing method, manufacturing method for substrate for information recording medium, and manufacturing method for information recording medium MY156912A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009214715A JP5449938B2 (en) 2009-09-16 2009-09-16 Glass blank, glass blank manufacturing method, information recording medium substrate manufacturing method, and information recording medium manufacturing method

Publications (1)

Publication Number Publication Date
MY156912A true MY156912A (en) 2016-04-15

Family

ID=43759130

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2012000978A MY156912A (en) 2009-09-16 2010-09-14 Glass blank, glass blank manufacturing method, manufacturing method for substrate for information recording medium, and manufacturing method for information recording medium

Country Status (4)

Country Link
JP (1) JP5449938B2 (en)
CN (1) CN102625782B (en)
MY (1) MY156912A (en)
WO (1) WO2011034037A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102603161B (en) * 2012-03-27 2014-06-11 四川钟顺太阳能开发有限公司 Production method of lens array blank, production method of lens array, and lens array
US10578234B2 (en) 2013-05-02 2020-03-03 Victaulic Company Coupling having arcuate stiffness ribs
US10859190B2 (en) 2016-05-16 2020-12-08 Victaulic Company Sprung coupling
US10533688B2 (en) 2016-05-16 2020-01-14 Victaulic Company Coupling having tabbed retainer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6442975B1 (en) * 1996-12-26 2002-09-03 Hoya Corporation Method of manufacturing thin-plate glass article, method of manufacturing glass substrate for information recording medium, and method of manufacturing magnetic recording medium
JP3714501B2 (en) * 1997-01-08 2005-11-09 Ｈｏｙａ株式会社 Thin plate glass and method for producing the same
JPH11189423A (en) * 1997-12-26 1999-07-13 Ngk Insulators Ltd Production of glass base plate
AU6390101A (en) * 2000-05-11 2001-11-20 Bonitz, Ralf Method and device for producing thin discoid glass blanks by pressing
JP4127974B2 (en) * 2001-01-29 2008-07-30 Ｈｏｙａ株式会社 Substrate blank, substrate, and information recording medium manufacturing method
JP4133091B2 (en) * 2002-08-02 2008-08-13 Ｈｏｙａ株式会社 Glass blank, information recording medium substrate, and information recording medium manufacturing method
JP4249477B2 (en) * 2002-12-26 2009-04-02 Ｈｏｙａ株式会社 Glass blank and method for manufacturing the same, method for manufacturing substrate for information recording medium, method for manufacturing information recording medium
JP4857571B2 (en) * 2005-02-15 2012-01-18 コニカミノルタオプト株式会社 Method for manufacturing glass substrate for magnetic recording medium

Also Published As

Publication number Publication date
CN102625782B (en) 2014-11-05
CN102625782A (en) 2012-08-01
WO2011034037A3 (en) 2011-05-05
WO2011034037A2 (en) 2011-03-24
JP5449938B2 (en) 2014-03-19
JP2011063474A (en) 2011-03-31

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