WO2008062847A1 - Verre pour substrat support d'enregistrement d'informations - Google Patents

Verre pour substrat support d'enregistrement d'informations Download PDF

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Publication number
WO2008062847A1
WO2008062847A1 PCT/JP2007/072590 JP2007072590W WO2008062847A1 WO 2008062847 A1 WO2008062847 A1 WO 2008062847A1 JP 2007072590 W JP2007072590 W JP 2007072590W WO 2008062847 A1 WO2008062847 A1 WO 2008062847A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass
information recording
recording medium
less
medium substrate
Prior art date
Application number
PCT/JP2007/072590
Other languages
English (en)
Japanese (ja)
Inventor
Tetsuya Nakashima
Kensuke Nagai
Kei Maeda
Original Assignee
Asahi Glass Company, Limited
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 Asahi Glass Company, Limited filed Critical Asahi Glass Company, Limited
Priority to JP2008545441A priority Critical patent/JP5396859B2/ja
Publication of WO2008062847A1 publication Critical patent/WO2008062847A1/fr

Links

Classifications

    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a glass substrate for information recording medium such as a glass substrate for magnetic disk and a glass for information recording medium substrate suitable for the glass substrate for information recording medium.
  • Glass substrates are widely used as substrates for information recording media, particularly as magnetic disk (node disks) substrates.
  • Non-chemically strengthened glass substrates for magnetic disks include SiO -A1 O -Li O-
  • Patent Document 1 One made of Na 2 O—K 2 O—TiO glass has been proposed (see Patent Document 1).
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-161597 (Table;! To 12)
  • the glass of Patent Document 1 has a maximum glass transition point (Tg) of 567 ° C.
  • Tg glass transition point
  • An object of the present invention is to provide a glass for an information recording medium substrate and a glass substrate for an information recording medium using the same, which can solve such problems.
  • SiO is 55 to 75% and Al 2 O is 1 to 12 in terms of mol% based on the following oxides.
  • a glass for an information recording medium substrate that is not more than%.
  • a glass substrate for information recording medium comprising the glass for information recording medium substrate. To do.
  • a glass for an information recording medium substrate having a Tg of 600 ° C or higher can be obtained.
  • a glass for an information recording medium substrate or a glass substrate for an information recording medium that has high strength, a low density, or that can be float formed.
  • the surface properties of the glass substrate change significantly during inventory, and films such as a base film, a magnetic film, and a protective film formed on the substrate. The problem of easy peeling is less likely to occur.
  • a glass substrate for information recording media can be produced without performing chemical strengthening treatment, the number of processes can be reduced, and the problem of contamination on the substrate surface after chemical strengthening treatment can be solved.
  • the Tg of the glass for an information recording medium substrate of the present invention is preferably 600 ° C or higher! If the temperature is lower than 600 ° C, the force for sufficiently increasing the heat treatment temperature for forming the magnetic layer cannot be achieved, and it may be difficult to increase the coercivity of the magnetic layer. More preferably, it is 610 ° C or higher, particularly preferably 620 ° C or higher.
  • the average linear expansion coefficient at 50 to 350 ° C of the glass of the present invention is preferably on 70 ⁇ 10_ 7 / ° C or less.
  • 70 X In 10_ 7 / ° less than C the thermal expansion coefficient of the metal hub attached to the substrate (typically 70 X 10- 7 ⁇ ; 100 X 10- 7 / ° C) difference between the increases, of the substrate Cracking is likely to occur.
  • alpha is typically less than 95 X 10- 7 / ° C.
  • the glass of the present invention has its liquidus temperature as T and the temperature at which the viscosity becomes 10 4 P (poise) as T.
  • (T ⁇ T) is preferably less than 50 ° C.
  • (T — T) is over 50 ° C
  • Float molding may be difficult, and is preferably less than 40 ° C, particularly preferably less than 30 ° C.
  • the temperature T at which the viscosity of the glass of the present invention becomes 10 2 P is preferably 1700 ° C or lower.
  • the glass substrate for magnetic disk is used for 2.5 inch substrate (glass substrate outer diameter: 65mm) used for notebook computers, etc. and portable ⁇ 3 player, etc. 1. 8 inch substrate
  • Glass substrate outer diameter: 48mm is widely used, and the market is expanding year by year. On the other hand, low-cost supply is required.
  • the glass used for such glass substrates is preferably suitable for mass production.
  • Mass production of sheet glass is widely performed by continuous molding methods such as the float method, fusion method, and downdraw method.
  • the glass of the present invention can be made into a glass that can be float formed, for example. Suitable for production.
  • the density of the glass of the present invention is preferably 2.50 g / cm 3 or less, more preferably 2.
  • the glass substrate for information recording medium of the present invention (hereinafter referred to as the glass substrate of the present invention) is a generally circular glass plate made of the glass of the present invention.
  • An example of the information recording medium is a magnetic disk.
  • Deposits are generated on the surface of the glass substrate during substrate stock, and films such as the base film, magnetic film, and protective film formed on the glass substrate are easily peeled off.
  • This deposit is considered to be a reaction product that has been generated and adhered to the glass substrate due to the effects of water in the air or carbon dioxide, and cannot be removed by wiping.
  • N is more preferably 0.8 / cm 2 or less, particularly preferred
  • N is more preferably 0.8 ⁇ 10 5 pieces / cm 2 or less, particularly preferably
  • the crack occurrence rate of the glass of the present invention is preferably 70% or less. If it exceeds 70%, the glass strength may be insufficient. More preferably, it is 60% or less, particularly preferably 50% or less.
  • the crack occurrence rate is obtained as follows. That is, in a room controlled at 23 ° C and a relative humidity of 70%, the mirror polished glass with a thickness of !! ⁇ 2mm and a size of 4cm x 4cm A Vickers indenter is driven into the surface of the lath plate with a load of 500 g, and the number of cracks generated from the four apexes is measured. This measurement is repeated 10 times, and 100 X (total number of cracks generated) / 40 is defined as the crack occurrence rate.
  • the method for producing the glass and the glass substrate of the present invention is not particularly limited, and various methods can be applied.
  • the raw materials of each component that are usually used are prepared so as to have a target composition, and this is heated and melted in a glass melting kiln. Homogenize the glass by publishing, stirring, adding a clarifying agent, etc., forming into a sheet glass of a specified thickness by methods such as the well-known float method, press method, fusion method, and downdraw method, and after slow cooling, as necessary After processing such as polishing ij and polishing, a glass substrate having a predetermined size is formed.
  • a float method suitable for mass production is particularly suitable.
  • continuous molding methods other than the float method, that is, the fusion method and the downdraw method are also suitable.
  • composition of the glass of the present invention will be described using mol% display.
  • SiO is a component that forms a glass skeleton and is essential. Less than 55% in glass
  • it is 60% or more, particularly preferably 62% or more, typically 64% or more, and more typically 65% or more. If it exceeds 75%, the high-temperature viscosity rises and it becomes difficult to melt the glass. Preferably it is 72% or less, More preferably, it is 71% or less.
  • Al 2 O is essential as it has the effect of increasing Tg and improving weather resistance. Less than 1%
  • Small effect Preferably it is 1.5% or more, more preferably 2% or more, and particularly preferably 2.5% or more. If it exceeds 12%, the high-temperature viscosity will increase, making it difficult to melt the glass.
  • Too high It is preferably 10% or less, more preferably 8% or less, particularly preferably 7% or less, and typically 6.5% or less.
  • MgO is an essential component with the effect of increasing ⁇ while maintaining weather resistance, scratching the glass, and improving glass solubility. If it is less than 2%, the effect is small. Preferably it is 5% or more, more preferably 7% or more, and most preferably 8% or more. Above 15%, TL becomes too high. Preferably it is 14% or less, more preferably 13% or less.
  • CaO is not essential! /, But may be contained up to 1.5% in order to increase ⁇ while maintaining the weather resistance or to improve the solubility of the glass. 1. If it exceeds 5%, the glass may be damaged. It is preferably 1% or less, more preferably less than 0.5%, typically 0.3% or less.
  • Na 2 O and K 2 O have the effect of increasing ⁇ and improving the solubility of glass.
  • the effect is small. Preferably over 2%, more preferred
  • It is preferably 5% or more, particularly preferably 7% or more, and typically 10% or more. If it exceeds 20%, the weather resistance is lowered and the glass transition point is lowered. It is preferably 17% or less, more preferably 15% or less, particularly preferably 14% or less, and typically 13.5% or less. Typically, NaO is 2 to 8%, K? Is 3 to 10%.
  • SiO force is over 0%
  • Al O force is 0% or less
  • Na O + K O is over 2% and 17% or less.
  • TiO is not an essential component, but it increases Tg, weather resistance, or glass melting.
  • phase separation phenomenon is likely to occur.
  • it is 7% or less, more preferably 6% or less, particularly preferably 5% or less.
  • the content is preferably 1% or more. More preferably, it is 1.5% or more, particularly preferably 2% or more, and most preferably 3% or more.
  • Total content of MgO and TiO MgO + TiO is preferably 10% or more
  • MgO + TiO is typically over 13%
  • SiO is 62 to 72%
  • Al O is 2 to 8%
  • MgO is 7 to 14%
  • ⁇ is 10-14%, 1 ⁇ is 0-6%.
  • the glass of the present invention consists essentially of the above components, but may contain other components as long as the object of the present invention is not impaired. In that case, the total content of the other ingredients is preferred. Or 10% or less, more preferably 5% or less, and typically 2% or less. For example, even if it contains up to 2% of total fining agents such as SO, Cl, AsO, SbO, SnO
  • B 2 O is not substantially contained from the following viewpoints.
  • the alkali borate compound with low vapor pressure is used.
  • SrO or BaO may be contained in a total range of 4% or less in order to increase ⁇ while maintaining the weather resistance and to improve the solubility of the glass. If it exceeds 4%, the glass may be easily damaged. Preferably it is 2% or less. However, when it contains BaO, its content must be 2 mol% or less.
  • SrO is not contained or even if it is contained, it is preferably less than 0.1%.
  • BaO is not contained, and even if it is contained, it is preferably less than 0.1%.
  • Tg will be low, the weather resistance will be lowered, or the glass will be easily damaged.
  • ZrO may be contained up to 0.5%. 0. Above 5%, glass is damaged
  • the molar ratio of MgO content to (total content of MgO, CaO, SrO and BaO): (MgO) / (MgO + CaO + SrO + BaO) is Preferably it is 0 ⁇ 6 or more. If it is less than 0.6, the glass tends to be damaged.
  • the total content of Li 0, Na 2 O, and KO is R ′ 2 O, and the alkaline earth metal oxide
  • the molar ratio of K 0 / (Li O + Na O + K ⁇ ) is preferably 0.2 or more.
  • Tg may be lowered or the weather resistance may be lowered. More preferably, it is 0.3 or more, particularly preferably 0.4 or more.
  • oxides of atoms with atomic numbers larger than Ti may easily damage the glass, the total content of these oxides should be 0.5% or less.
  • Force S is preferred. More preferably, it is 0.3% or less, particularly preferably 0.2% or less, and most preferably 0.1% or less.
  • composition of the raw materials of each component is shown in mol% in the columns up to SiO power and ZrO in the table.
  • RO is the total content of MgO, CaO, SrO and BaO (unit: mol%)
  • R and O are Li
  • the glasses of Examples 1-11 are examples, and the glasses of Examples 12-25 are comparative examples.
  • Tg Using a differential thermal dilatometer, with quartz glass as the reference sample, from room temperature to 5 ° C / min The elongation of the glass when the temperature is raised is measured to the temperature at which the glass is softened and no longer stretched, i.e., to the yield point. did.
  • the average linear expansion coefficient at ⁇ 350 ° C. was calculated.
  • T The glass is crushed into about 2 mm glass grains in a mortar, and the glass grains are placed in a platinum boat.
  • the maximum temperature of the glass grains on which crystals were deposited was defined as the liquidus temperature.
  • T Measured with a rotational viscometer.
  • ⁇ , ⁇ Thickness ⁇ ⁇ 2mm, 4cm X 4cm size glass plate both sides mirror polished, charcoal

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

L'invention concerne un verre ayant une température de transition vitreuse élevée, qui peut être utilisé pour un substrat support d'enregistrement d'informations. Le verre pour substrat support d'enregistrement d'informations contient les oxydes suivants en pourcentage en moles ; SiO2 de 55 à 75 %, Al2O3 de 1 à 12 %, MgO de 2 à 15 %, CaO de 0 à 1,5 %, Na2O ou K2O de 1 à 20 % et TiO2 de 0 à 8 %. Lorsque le verre contient BaO, sa teneur est inférieure ou égale à 2 %, lorsqu'il contient Li2O, sa teneur est inférieure ou égale à 1 % et lorsqu'il contient ZrO2, sa teneur est inférieure ou égale à 0,5 %. La température de transition vitreuse du verre est supérieure ou égale à 600 °C.
PCT/JP2007/072590 2006-11-22 2007-11-21 Verre pour substrat support d'enregistrement d'informations WO2008062847A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008545441A JP5396859B2 (ja) 2006-11-22 2007-11-21 情報記録媒体基板用ガラス

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006315122 2006-11-22
JP2006-315122 2006-11-22

Publications (1)

Publication Number Publication Date
WO2008062847A1 true WO2008062847A1 (fr) 2008-05-29

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PCT/JP2007/072590 WO2008062847A1 (fr) 2006-11-22 2007-11-21 Verre pour substrat support d'enregistrement d'informations

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JP (1) JP5396859B2 (fr)
CN (1) CN101541696A (fr)
MY (1) MY157935A (fr)
WO (1) WO2008062847A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010059038A (ja) * 2008-08-04 2010-03-18 Nippon Electric Glass Co Ltd 強化ガラスおよびその製造方法
US7754356B2 (en) 2008-01-28 2010-07-13 Asahi Glass Company, Limited Glass for data storage medium substrate, glass substrate for data storage medium and magnetic disk
US7803472B2 (en) 2007-03-23 2010-09-28 Asahi Glass Company, Limited Substrate glass for data storage medium and glass substrate
SG165260A1 (en) * 2009-04-02 2010-10-28 Asahi Glass Co Ltd Glass for information recording medium substrate, glass substrate for information recording medium and magnetic disk
US7838136B2 (en) 2007-10-26 2010-11-23 Asahi Glass Company, Limited Glass for information recording media substrate, glass substrate for magnetic disk and magnetic disk
WO2011019010A1 (fr) * 2009-08-10 2011-02-17 Hoya株式会社 Verre pour substrat de support d'enregistrement magnétique, substrat de support d'enregistrement magnétique et procédé pour le produire, et support d'enregistrement magnétique
WO2012057338A1 (fr) * 2010-10-29 2012-05-03 Hoya株式会社 Substrat de verre destiné à être utilisé dans un support de stockage magnétique, support de stockage magnétique et ébauche d'un substrat de verre destiné à être utilisé dans un support de stockage magnétique
WO2013047246A1 (fr) * 2011-09-30 2013-04-04 旭硝子株式会社 SUBSTRAT DE VERRE POUR DES CELLULES SOLAIRES CdTe ET CELLULE SOLAIRE L'UTILISANT
WO2013172247A1 (fr) * 2012-05-16 2013-11-21 Hoya株式会社 Verre pour substrat de support d'enregistrement magnétique et utilisation associée
US8623776B2 (en) 2008-02-26 2014-01-07 Corning Incorporated Silicate glasses having low seed concentration
JP2014232561A (ja) * 2009-04-02 2014-12-11 旭硝子株式会社 情報記録媒体基板用ガラス、情報記録媒体用ガラス基板および磁気ディスク
EP3305737A3 (fr) * 2011-10-25 2018-07-25 Corning Incorporated Compositions de verre présentant une meilleure durabilité chimique et mécanique
US10273048B2 (en) 2012-06-07 2019-04-30 Corning Incorporated Delamination resistant glass containers with heat-tolerant coatings
US10577274B2 (en) 2011-10-25 2020-03-03 Corning Incorporated Alkaline earth alumino-silicate glass compositions with improved chemical and mechanical durability

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KR101964542B1 (ko) 2010-09-27 2019-04-01 에이지씨 가부시키가이샤 화학 강화용 유리, 화학 강화 유리 및 디스플레이 장치용 유리판
JP5880439B2 (ja) * 2010-10-27 2016-03-09 旭硝子株式会社 ガラス板およびその製造方法
WO2014148020A1 (fr) * 2013-03-22 2014-09-25 日本板硝子株式会社 Composition de verre, composition de verre pour renfort chimique, article en verre renforcé, et lamelle couvre-objet pour présentation

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JPH11191212A (ja) * 1997-12-25 1999-07-13 Toshitomo Morisane 高強度スムーズガラス基板
JP2001294441A (ja) * 2000-04-11 2001-10-23 Asahi Glass Co Ltd 基板用ガラス
JP2001348246A (ja) * 2000-06-01 2001-12-18 Asahi Glass Co Ltd 基板用ガラスおよびガラス基板
JP2002029774A (ja) * 2000-07-19 2002-01-29 Asahi Glass Co Ltd 情報記録媒体基板用ガラスおよび情報記録媒体用ガラス基板

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1072238A (ja) * 1996-04-26 1998-03-17 Carl Zeiss:Fa 化学強化可能なアルミノケイ酸塩ガラス及びその使用
JPH11191212A (ja) * 1997-12-25 1999-07-13 Toshitomo Morisane 高強度スムーズガラス基板
JP2001294441A (ja) * 2000-04-11 2001-10-23 Asahi Glass Co Ltd 基板用ガラス
JP2001348246A (ja) * 2000-06-01 2001-12-18 Asahi Glass Co Ltd 基板用ガラスおよびガラス基板
JP2002029774A (ja) * 2000-07-19 2002-01-29 Asahi Glass Co Ltd 情報記録媒体基板用ガラスおよび情報記録媒体用ガラス基板

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US7803472B2 (en) 2007-03-23 2010-09-28 Asahi Glass Company, Limited Substrate glass for data storage medium and glass substrate
US7838136B2 (en) 2007-10-26 2010-11-23 Asahi Glass Company, Limited Glass for information recording media substrate, glass substrate for magnetic disk and magnetic disk
US8119268B2 (en) 2007-10-26 2012-02-21 Asahi Glass Company, Limited Glass for information recording media substrate, glass substrate for magnetic disk and magnetic disk
US7754356B2 (en) 2008-01-28 2010-07-13 Asahi Glass Company, Limited Glass for data storage medium substrate, glass substrate for data storage medium and magnetic disk
US8563149B2 (en) 2008-01-28 2013-10-22 Asahi Glass Company, Limited Glass for data storage medium substrate, glass substrate for data storage medium and magnetic disk
US10626042B2 (en) 2008-02-26 2020-04-21 Corning Incorporated Fining agents for silicate glasses
US9073779B2 (en) 2008-02-26 2015-07-07 Corning Incorporated Fining agents for silicate glasses
US8623776B2 (en) 2008-02-26 2014-01-07 Corning Incorporated Silicate glasses having low seed concentration
US10040715B2 (en) 2008-02-26 2018-08-07 Corning Incorporated Silicate glasses having low seed concentration
JP2010059038A (ja) * 2008-08-04 2010-03-18 Nippon Electric Glass Co Ltd 強化ガラスおよびその製造方法
JP2014232561A (ja) * 2009-04-02 2014-12-11 旭硝子株式会社 情報記録媒体基板用ガラス、情報記録媒体用ガラス基板および磁気ディスク
US8168313B2 (en) 2009-04-02 2012-05-01 Asahi Glass Company, Limited Glass for information recording medium substrate, glass substrate for information recording medium and magnetic disk
JP2016117648A (ja) * 2009-04-02 2016-06-30 旭硝子株式会社 情報記録媒体基板用ガラス、情報記録媒体用ガラス基板および磁気ディスク
JP2010254549A (ja) * 2009-04-02 2010-11-11 Asahi Glass Co Ltd 情報記録媒体基板用ガラス、情報記録媒体用ガラス基板および磁気ディスク
SG165260A1 (en) * 2009-04-02 2010-10-28 Asahi Glass Co Ltd Glass for information recording medium substrate, glass substrate for information recording medium and magnetic disk
CN102471133A (zh) * 2009-08-10 2012-05-23 Hoya株式会社 磁记录介质基板用玻璃、磁记录介质基板及其制造方法、以及磁记录介质
US8603653B2 (en) 2009-08-10 2013-12-10 Hoya Corporation Glass for magnetic recording medium substrate, magnetic recording medium substrate and method of manufacturing the same, and magnetic recording medium
JP5734189B2 (ja) * 2009-08-10 2015-06-17 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その製造方法、ならびに磁気記録媒体
WO2011019010A1 (fr) * 2009-08-10 2011-02-17 Hoya株式会社 Verre pour substrat de support d'enregistrement magnétique, substrat de support d'enregistrement magnétique et procédé pour le produire, et support d'enregistrement magnétique
JP2015062150A (ja) * 2009-08-10 2015-04-02 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その製造方法、ならびに磁気記録媒体
CN102471133B (zh) * 2009-08-10 2014-10-15 Hoya株式会社 磁记录介质基板用玻璃、磁记录介质基板及其制造方法、以及磁记录介质
JP5542953B2 (ja) * 2010-10-29 2014-07-09 Ｈｏｙａ株式会社 磁気記録媒体用ガラス基板、磁気記録媒体、および磁気記録媒体用ガラス基板ブランク
WO2012057338A1 (fr) * 2010-10-29 2012-05-03 Hoya株式会社 Substrat de verre destiné à être utilisé dans un support de stockage magnétique, support de stockage magnétique et ébauche d'un substrat de verre destiné à être utilisé dans un support de stockage magnétique
JPWO2012057338A1 (ja) * 2010-10-29 2014-05-12 Hoya株式会社 磁気記録媒体用ガラス基板、磁気記録媒体、および磁気記録媒体用ガラス基板ブランク
US8394516B2 (en) 2010-10-29 2013-03-12 Hoya Corporation Glass substrate for magnetic recording medium and magnetic recording medium
WO2013047246A1 (fr) * 2011-09-30 2013-04-04 旭硝子株式会社 SUBSTRAT DE VERRE POUR DES CELLULES SOLAIRES CdTe ET CELLULE SOLAIRE L'UTILISANT
US10597322B2 (en) 2011-10-25 2020-03-24 Corning Incorporated Glass compositions with improved chemical and mechanical durability
EP3305737A3 (fr) * 2011-10-25 2018-07-25 Corning Incorporated Compositions de verre présentant une meilleure durabilité chimique et mécanique
US10196298B2 (en) 2011-10-25 2019-02-05 Corning Incorporated Glass compositions with improved chemical and mechanical durability
EP3514120A1 (fr) * 2011-10-25 2019-07-24 Corning Incorporated Compositions de verre présentant une meilleure durabilité chimique et mécanique
US10577274B2 (en) 2011-10-25 2020-03-03 Corning Incorporated Alkaline earth alumino-silicate glass compositions with improved chemical and mechanical durability
US11168017B2 (en) 2011-10-25 2021-11-09 Corning Incorporated Alkaline earth alumino-silicate glass compositions with improved chemical and mechanical durability
US11325855B2 (en) 2011-10-25 2022-05-10 Corning Incorporated Glass compositions with improved chemical and mechanical durability
WO2013172247A1 (fr) * 2012-05-16 2013-11-21 Hoya株式会社 Verre pour substrat de support d'enregistrement magnétique et utilisation associée
US8824248B2 (en) 2012-05-16 2014-09-02 Hoya Corporation Glass for magnetic recording medium substrate and usage thereof
US9007878B2 (en) 2012-05-16 2015-04-14 Hoya Corporation Glass for magnetic recording medium substrate and usage thereof
US10273048B2 (en) 2012-06-07 2019-04-30 Corning Incorporated Delamination resistant glass containers with heat-tolerant coatings
US10273049B2 (en) 2012-06-28 2019-04-30 Corning Incorporated Delamination resistant glass containers with heat-tolerant coatings

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JP5396859B2 (ja) 2014-01-22
MY157935A (en) 2016-08-15
JPWO2008062847A1 (ja) 2010-03-04

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