MY208742A - Glass for magnetic recording medium substrate or for glass spacer to be used in magnetic recording/reproducing device, magnetic recording medium substrate, magnetic recording medium, glass spacer to be used in magnetic recording/reproducing device, and magnetic recording/reproducing device - Google Patents

Glass for magnetic recording medium substrate or for glass spacer to be used in magnetic recording/reproducing device, magnetic recording medium substrate, magnetic recording medium, glass spacer to be used in magnetic recording/reproducing device, and magnetic recording/reproducing device

Info

Publication number
MY208742A
MY208742A MYPI2022002939A MYPI2022002939A MY208742A MY 208742 A MY208742 A MY 208742A MY PI2022002939 A MYPI2022002939 A MY PI2022002939A MY PI2022002939 A MYPI2022002939 A MY PI2022002939A MY 208742 A MY208742 A MY 208742A
Authority
MY
Malaysia
Prior art keywords
magnetic recording
reproducing device
recording medium
glass
medium substrate
Prior art date
Application number
MYPI2022002939A
Other languages
English (en)
Inventor
Koichi Sato
Kazuaki Hashimoto
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 MY208742A publication Critical patent/MY208742A/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
    • G11B5/62—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
    • 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
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/038—Centering or locking of a plurality of discs in a single cartridge
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/03—Containers for flat record 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/23—Gap features
    • G11B5/235—Selection of material for gap filler
    • 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
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces
    • B24B41/053—Grinding heads for working on plane surfaces for grinding or polishing glass

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)
MYPI2022002939A 2019-12-13 2020-12-11 Glass for magnetic recording medium substrate or for glass spacer to be used in magnetic recording/reproducing device, magnetic recording medium substrate, magnetic recording medium, glass spacer to be used in magnetic recording/reproducing device, and magnetic recording/reproducing device MY208742A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019225368 2019-12-13
PCT/JP2020/046405 WO2021117897A1 (ja) 2019-12-13 2020-12-11 磁気記録媒体基板用または磁気記録再生装置用ガラススペーサ用のガラス、磁気記録媒体基板、磁気記録媒体、磁気記録再生装置用ガラススペーサおよび磁気記録再生装置

Publications (1)

Publication Number Publication Date
MY208742A true MY208742A (en) 2025-05-27

Family

ID=76330058

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2022002939A MY208742A (en) 2019-12-13 2020-12-11 Glass for magnetic recording medium substrate or for glass spacer to be used in magnetic recording/reproducing device, magnetic recording medium substrate, magnetic recording medium, glass spacer to be used in magnetic recording/reproducing device, and magnetic recording/reproducing device

Country Status (5)

Country Link
US (3) US11999652B2 (https=)
JP (3) JP7383050B2 (https=)
CN (1) CN114787093A (https=)
MY (1) MY208742A (https=)
WO (1) WO2021117897A1 (https=)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11081133B2 (en) * 2016-11-14 2021-08-03 Hoya Corporation Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium and glass spacer for magnetic recording and reproducing apparatus
MY204452A (en) 2018-05-16 2024-08-29 Hoya Corp Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium, glass spacer for magnetic recording and reproducing apparatus, and magnetic recording and reproducing apparatus
WO2020262702A1 (ja) * 2019-06-28 2020-12-30 Hoya株式会社 ガラス板の製造方法および磁気ディスクの製造方法
CN120441191A (zh) * 2019-07-22 2025-08-08 Hoya株式会社 玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置
CN114787093A (zh) * 2019-12-13 2022-07-22 豪雅株式会社 磁记录介质基板用或磁记录再生装置用玻璃间隔物用的玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置
WO2023281610A1 (ja) * 2021-07-05 2023-01-12 Hoya株式会社 ガラス板、円板状ガラス、および磁気ディスク用ガラス基板
JP7766206B2 (ja) * 2022-09-08 2025-11-07 Hoya株式会社 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置
JP2025010844A (ja) * 2023-07-10 2025-01-23 日本板硝子株式会社 情報記録媒体用ガラス板

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6144732A (ja) * 1984-08-06 1986-03-04 Toshiba Corp 基板用ガラス
MY118912A (en) * 1996-09-04 2005-02-28 Hoya Corp Glass for information recording medium substrate and glass substrate
JP3011703B1 (ja) * 1998-02-26 2000-02-21 株式会社オハラ 情報磁気記憶媒体用高剛性ガラスセラミックス基板
JP3022524B1 (ja) 1998-02-26 2000-03-21 株式会社オハラ 情報磁気記憶媒体用高剛性ガラスセラミックス基板
JPH11278865A (ja) * 1998-03-30 1999-10-12 Ngk Insulators Ltd 磁気ディスク基板用結晶化ガラス、磁気ディスク用基板、磁気ディスクおよび磁気ディスク基板用結晶化ガラスの製造方法
JP2004288228A (ja) * 2003-01-31 2004-10-14 Hoya Corp 情報記録媒体用基板、情報記録媒体およびその製造方法
SG171640A1 (en) * 2006-06-08 2011-06-29 Hoya Corp Glass for use in substrate for information recording medium, substrate for information recording medium and information recording medium, and their manufacturing method
EP2465828A4 (en) * 2009-08-10 2014-03-26 Hoya Corp GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM SUBSTRATE AND METHOD FOR PRODUCING THE SAME, AND MAGNETIC RECORDING MEDIUM
SG184235A1 (en) * 2010-03-31 2012-10-30 Hoya Corp Method of manufacturing glass blank for magnetic recording medium glass substrate, method of manufacturing magnetic recording medium glass substrate, and method of manufacturing magnetic recording medium
US8394516B2 (en) * 2010-10-29 2013-03-12 Hoya Corporation Glass substrate for magnetic recording medium and magnetic recording medium
US8652660B2 (en) * 2010-12-21 2014-02-18 Hoya Corporation Glass substrate for magnetic recording medium and its use
SG10201605515PA (en) * 2012-05-16 2016-09-29 Hoya Corp Glass for magnetic recording medium substrate and usage thereof
EP2857366A1 (en) * 2012-06-05 2015-04-08 Asahi Glass Company, Limited Alkali-free glass and method for producing same
CN104364215A (zh) * 2012-06-05 2015-02-18 旭硝子株式会社 无碱玻璃及其制造方法
WO2013183569A1 (ja) * 2012-06-05 2013-12-12 旭硝子株式会社 磁気ディスクの製造方法および情報記録媒体用ガラス基板
CN103708724B (zh) * 2012-09-29 2017-02-08 成都光明光电股份有限公司 精密模压用光学玻璃、玻璃预制件、光学元件及光学仪器
JP2015005479A (ja) 2013-06-24 2015-01-08 株式会社Ｇｓユアサ 蓄電素子
CN105517966B (zh) 2013-09-09 2017-12-19 Hoya株式会社 玻璃基板
JP6131154B2 (ja) * 2013-09-11 2017-05-17 Hoya株式会社 磁気記録媒体基板用ガラスおよび磁気記録媒体基板
JP2015224150A (ja) 2014-05-27 2015-12-14 旭硝子株式会社 無アルカリガラスの製造方法
US11081133B2 (en) * 2016-11-14 2021-08-03 Hoya Corporation Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium and glass spacer for magnetic recording and reproducing apparatus
JP7276645B2 (ja) * 2017-08-08 2023-05-18 日本電気硝子株式会社 磁気記録媒体用ガラス基板
MY204452A (en) 2018-05-16 2024-08-29 Hoya Corp Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium, glass spacer for magnetic recording and reproducing apparatus, and magnetic recording and reproducing apparatus
CN120441191A (zh) * 2019-07-22 2025-08-08 Hoya株式会社 玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置
CN114787093A (zh) * 2019-12-13 2022-07-22 豪雅株式会社 磁记录介质基板用或磁记录再生装置用玻璃间隔物用的玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置

Also Published As

Publication number Publication date
US12473225B2 (en) 2025-11-18
CN114787093A (zh) 2022-07-22
US11999652B2 (en) 2024-06-04
JP7383050B2 (ja) 2023-11-17
JPWO2021117897A1 (https=) 2021-06-17
JP2025061251A (ja) 2025-04-10
US20240286946A1 (en) 2024-08-29
JP7621437B2 (ja) 2025-01-24
US20260055020A1 (en) 2026-02-26
WO2021117897A1 (ja) 2021-06-17
JP2023166439A (ja) 2023-11-21
US20230192530A1 (en) 2023-06-22

Similar Documents

Publication Publication Date Title
MY208742A (en) Glass for magnetic recording medium substrate or for glass spacer to be used in magnetic recording/reproducing device, magnetic recording medium substrate, magnetic recording medium, glass spacer to be used in magnetic recording/reproducing device, and magnetic recording/reproducing device
MY204452A (en) Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium, glass spacer for magnetic recording and reproducing apparatus, and magnetic recording and reproducing apparatus
MY207080A (en) Glass for magnetic recording medium substrates, magnetic recording medium substrate, magnetic recording medium, glass spacer for magnetic recording and reproducing apparatus, and magnetic recording and reproducing apparatus
MY154012A (en) Glass for data storage medium substrate, glass substrate for data storage medium and magnetic disk
WO2021108314A8 (en) Ion exchangeable alkali aluminosilicate glass compositions having improved mechanical durability
MY152135A (en) Glass for use in substrate for information recording medium, substrate for information recording medium and information recording medium, and their manufacturing method
MY177073A (en) Method for producing magnetic disk, and glass substrate for information recording medium
SG152186A1 (en) Glass for information recording media substrate, glass substrate for magnetic disk and magnetic disk
MY161708A (en) Glass for substrate, and glass substrate
EP1829833A4 (en) SHED GLASS
EP1867612A4 (en) UV-CIRCULAR GLASS COMPOSITION AND SOFTWARE PRODUCED THEREFOR
WO2001049620A3 (en) Alkaline-earth-free boroalkali silicate glass
MY157935A (en) Glass for information recording media substrate
MY158789A (en) Glass for magnetic recording media substrates, magnetic recording media substrates, magnetic recording media and method for preparation thereof
MY158507A (en) Glass substrate for magnetic recording medium, magnetic recording medium, and glass substrate blank for magnetic recording medium
RU2008119422A (ru) Составы стекла
WO2009041348A1 (ja) 強化ガラス及び強化ガラス基板、並びにその製造方法
TWI264422B (en) UV-blocking borosilicate glass, the use of the same, and a fluorescent lamp
HUP9602086A2 (hu) Üvegkompozíció
ATE244208T1 (de) Alkali-zink-silicat-glaskeramiken und -gläser
ES2193945T3 (es) Vidrio con alto contenido en oxido de zirconio y sus utilizaciones.
MX2012001466A (es) Vidrio libre de litio, con modulo mejorado.
JPWO2021015240A5 (ja) 磁気記録媒体基板用または磁気記録再生装置用ガラススペーサ用のガラス、磁気記録媒体基板、磁気記録媒体、磁気記録再生装置用ガラススペーサおよび磁気記録再生装置
WO2008156091A1 (ja) ガラス組成物
WO2008117758A1 (ja) データ記憶媒体用基板ガラスおよびガラス基板