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SG152118A1 - Manufacturing method of glass substrate for magnetic disc and manufacturing method of magnetic disc - Google Patents

Manufacturing method of glass substrate for magnetic disc and manufacturing method of magnetic disc

Info

Publication number
SG152118A1
SG152118A1 SG200805711-9A SG2008057119A SG152118A1 SG 152118 A1 SG152118 A1 SG 152118A1 SG 2008057119 A SG2008057119 A SG 2008057119A SG 152118 A1 SG152118 A1 SG 152118A1
Authority
SG
Singapore
Prior art keywords
magnetic disc
manufacturing
chemical strengthening
glass substrate
shape
Prior art date
Application number
SG200805711-9A
Inventor
Kenichiro Terada
Katsuyuki Iwata
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 SG152118A1 publication Critical patent/SG152118A1/en

Links

Landscapes

  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

In a manufacturing method of a glass substrate 1 for a magnetic disc and a magnetic disc which executes a polishing step after chemical strengthening for changing shape of an edge portion of the glass substrate 1 for a magnetic disc after a chemical strengthening step for carrying out a chemical strengthening processing, the chemical strengthening step carries out control to leave shape which is difference between the shape of the edge portion after the polishing step after chemical strengthening and a targeted shape of the edge portion and is to be removed in the polishing step after chemical strengthening.
SG200805711-9A 2007-10-23 2008-07-31 Manufacturing method of glass substrate for magnetic disc and manufacturing method of magnetic disc SG152118A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007274717A JP2009104703A (en) 2007-10-23 2007-10-23 Method for manufacturing glass substrate for magnetic disk, and method for manufacturing magnetic disk

Publications (1)

Publication Number Publication Date
SG152118A1 true SG152118A1 (en) 2009-05-29

Family

ID=40677402

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200805711-9A SG152118A1 (en) 2007-10-23 2008-07-31 Manufacturing method of glass substrate for magnetic disc and manufacturing method of magnetic disc

Country Status (2)

Country Link
JP (1) JP2009104703A (en)
SG (1) SG152118A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5461936B2 (en) * 2009-09-25 2014-04-02 Ｈｏｙａ株式会社 Manufacturing method of glass substrate for magnetic disk
JP2013080530A (en) * 2011-09-30 2013-05-02 Hoya Corp Manufacturing method of glass substrate for magnetic disc and manufacturing method of magnetic disc
JP6809229B2 (en) * 2015-01-20 2021-01-06 Ａｇｃ株式会社 Chemically tempered glass and manufacturing method of chemically tempered glass

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6595028B1 (en) * 1999-09-30 2003-07-22 Hoya Corporation Chemical reinforced glass substrate having desirable edge profile and method of manufacturing the same
US20050096210A1 (en) * 2003-10-31 2005-05-05 Konica Minolta Opto, Inc. Glass substrate for an information recording medium and information recording medium employing it

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3568888B2 (en) * 1999-09-30 2004-09-22 Ｈｏｙａ株式会社 Glass substrate for information recording medium, information recording medium, and method for producing them

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6595028B1 (en) * 1999-09-30 2003-07-22 Hoya Corporation Chemical reinforced glass substrate having desirable edge profile and method of manufacturing the same
US20050096210A1 (en) * 2003-10-31 2005-05-05 Konica Minolta Opto, Inc. Glass substrate for an information recording medium and information recording medium employing it

Also Published As

Publication number Publication date
JP2009104703A (en) 2009-05-14

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