MY160257A - Glass blank and method of producing glass blank, magnetic recording medium and substrate of magnetic recording medium - Google Patents

Glass blank and method of producing glass blank, magnetic recording medium and substrate of magnetic recording medium

Info

Publication number
MY160257A
MY160257A MYPI2010005500A MYPI2010005500A MY160257A MY 160257 A MY160257 A MY 160257A MY PI2010005500 A MYPI2010005500 A MY PI2010005500A MY PI2010005500 A MYPI2010005500 A MY PI2010005500A MY 160257 A MY160257 A MY 160257A
Authority
MY
Malaysia
Prior art keywords
glass blank
recording medium
magnetic recording
substrate
projection
Prior art date
Application number
MYPI2010005500A
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 MY160257A publication Critical patent/MY160257A/en

Links

Landscapes

  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

A GLASS BLANK (101) FORMED AS A THIN PLATE-LIKE GLASS MOLDED PRODUCT, COMPRISING: A FIRST PROJECTION (111) FORMED TO PROTRUDE AT AN EDGE PART OF A FIRST SURFACE (110) OF THE GLASS BLANK IN A DIRECTION OF A NORMAL TO THE FIRST SURFACE; AND A SECOND PROJECTION (121) FORMED TO PROTRUDE AT AN EDGE PART OF A SECOND SURFACE (120) OF THE GLASS BLANK IN A DIRECTION OF A NORMAL TO THE SECOND SURFACE, AND WHEREIN TOP FACES OF THE FIRST (111A, 121A) AND SECOND PROJECTIONS (111,121) ARE APPROXIMATELY PARALLEL WITH THE FIRST AND SECOND SURFACES, RESPECTIVELY, A FIRST SLANTING SURFACE (112) IS FORMED TO EXTEND FROM THE TOP FACE OF THE FIRST PROJECTION TO THE FIRST SURFACE, AND A SECOND SLANTING SURFACE (122) IS FORMED TO EXTEND FROM THE TOP FACE OF THE SECOND PROJECTION TO THE SECOND SURFACE.
MYPI2010005500A 2009-11-25 2010-11-23 Glass blank and method of producing glass blank, magnetic recording medium and substrate of magnetic recording medium MY160257A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009266980 2009-11-25

Publications (1)

Publication Number Publication Date
MY160257A true MY160257A (en) 2017-02-28

Family

ID=44345283

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2010005500A MY160257A (en) 2009-11-25 2010-11-23 Glass blank and method of producing glass blank, magnetic recording medium and substrate of magnetic recording medium

Country Status (3)

Country Link
JP (1) JP5497612B2 (en)
CN (1) CN102157167B (en)
MY (1) MY160257A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013046585A1 (en) * 2011-09-28 2013-04-04 コニカミノルタアドバンストレイヤー株式会社 Method of manufacturing glass substrates for hard disk drives

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3199461B2 (en) * 1992-06-05 2001-08-20 オリンパス光学工業株式会社 Optical element molding method and molding die
JPH09102122A (en) * 1995-10-03 1997-04-15 Kao Corp Substrate for recording medium
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
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
JP4274708B2 (en) * 2001-05-14 2009-06-10 Ｈｏｙａ株式会社 Glass substrate for magnetic recording medium and manufacturing method thereof
JP5015184B2 (en) * 2009-02-25 2012-08-29 Ｈｏｙａ株式会社 Information recording medium glass blank, information recording medium substrate manufacturing method, and information recording medium manufacturing method

Also Published As

Publication number Publication date
CN102157167A (en) 2011-08-17
JP5497612B2 (en) 2014-05-21
JP2011132116A (en) 2011-07-07
CN102157167B (en) 2015-11-25

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