SG160307A1 - Magnetic disk substrate and magnetic disk - Google Patents

Magnetic disk substrate and magnetic disk

Info

Publication number
SG160307A1
SG160307A1 SG200906324-9A SG2009063249A SG160307A1 SG 160307 A1 SG160307 A1 SG 160307A1 SG 2009063249 A SG2009063249 A SG 2009063249A SG 160307 A1 SG160307 A1 SG 160307A1
Authority
SG
Singapore
Prior art keywords
magnetic disk
disk substrate
less
main surface
irradiated
Prior art date
Application number
SG200906324-9A
Other languages
English (en)
Inventor
Kenichi Nishimori
Tadashi Tomonaga
Original Assignee
Hoya Corp
Hoya Glass Disk Thailand Ltd
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, Hoya Glass Disk Thailand Ltd filed Critical Hoya Corp
Publication of SG160307A1 publication Critical patent/SG160307A1/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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82—Disk carriers
    • 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73911—Inorganic substrates
    • G11B5/73921—Glass or ceramic substrates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)
SG200906324-9A 2008-09-26 2009-09-23 Magnetic disk substrate and magnetic disk SG160307A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008247161 2008-09-26
JP2009203694A JP2010102819A (ja) 2008-09-26 2009-09-03 磁気ディスク用基板及び磁気ディスク

Publications (1)

Publication Number Publication Date
SG160307A1 true SG160307A1 (en) 2010-04-29

Family

ID=42048759

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200906324-9A SG160307A1 (en) 2008-09-26 2009-09-23 Magnetic disk substrate and magnetic disk

Country Status (4)

Country Link
US (1) US20100081013A1 (zh)
JP (1) JP2010102819A (zh)
CN (1) CN101685640A (zh)
SG (1) SG160307A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8241768B2 (en) 2007-02-20 2012-08-14 Hoya Corporation Magnetic disk substrate, magnetic disk, and magnetic disk device
JP5979872B2 (ja) * 2011-01-31 2016-08-31 花王株式会社 磁気ディスク基板の製造方法
JP5979871B2 (ja) * 2011-03-09 2016-08-31 花王株式会社 磁気ディスク基板の製造方法
JP5335983B2 (ja) * 2011-10-05 2013-11-06 Ｈｏｙａ株式会社 磁気ディスク用ガラス基板および磁気記録媒体
JP5067498B1 (ja) * 2011-10-13 2012-11-07 旭硝子株式会社 磁気記録媒体用ガラス基板及び磁気記録媒体

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411377B1 (en) * 1991-04-02 2002-06-25 Hitachi, Ltd. Optical apparatus for defect and particle size inspection
JPH11221742A (ja) * 1997-09-30 1999-08-17 Hoya Corp 研磨方法及び研磨装置並びに磁気記録媒体用ガラス基板及び磁気記録媒体
US6699588B2 (en) * 1999-07-22 2004-03-02 Seagate Technology, Inc. Medium with a NiNb sealing layer
US6615613B1 (en) * 1999-09-30 2003-09-09 Hoya Corporation Method of grinding a substrate and method of manufacturing a glass substrate and a magnetic recording medium by the use of the glass substrate
JP3734745B2 (ja) * 2000-12-18 2006-01-11 Ｈｏｙａ株式会社 磁気記録媒体用ガラス基板の製造方法およびそれを用いて得られる磁気記録媒体用ガラス基板
JP3886802B2 (ja) * 2001-03-30 2007-02-28 株式会社東芝 磁性体のパターニング方法、磁気記録媒体、磁気ランダムアクセスメモリ
US7083871B2 (en) * 2002-05-09 2006-08-01 Maxtor Corporation Single-sided sputtered magnetic recording disks
TWI229324B (en) * 2002-05-09 2005-03-11 Maxtor Corp Method of simultaneous two-disk processing of single-sided magnetic recording disks
WO2005123857A1 (en) * 2004-06-22 2005-12-29 Asahi Glass Company, Limited Polishing method for glass substrate, and glass substrate
JP2008171472A (ja) * 2007-01-09 2008-07-24 Fuji Electric Device Technology Co Ltd 情報記録媒体用ガラス基板の製造方法、磁気記録ディスクの製造方法および磁気記録ディスク

Also Published As

Publication number Publication date
JP2010102819A (ja) 2010-05-06
CN101685640A (zh) 2010-03-31
US20100081013A1 (en) 2010-04-01

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