SG11201407592YA - Glass for magnetic recording medium substrate and usage thereof - Google Patents

Glass for magnetic recording medium substrate and usage thereof

Info

Publication number
SG11201407592YA
SG11201407592YA SG11201407592YA SG11201407592YA SG11201407592YA SG 11201407592Y A SG11201407592Y A SG 11201407592YA SG 11201407592Y A SG11201407592Y A SG 11201407592YA SG 11201407592Y A SG11201407592Y A SG 11201407592YA SG 11201407592Y A SG11201407592Y A SG 11201407592YA
Authority
SG
Singapore
Prior art keywords
mgo
lllll
cao
glass
sro
Prior art date
Application number
SG11201407592YA
Inventor
Naomi Matsumoto
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 SG11201407592YA publication Critical patent/SG11201407592YA/en

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
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/06—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals
    • 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
    • C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
    • 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
    • C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
    • C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
    • C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
    • 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
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
    • 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
    • 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal

Abstract

(i2) mwu ft iz s-5 iv x m £ titz s issaj n d9) mm IHMMi _ (41) SI5S4>!H B 2013 #11 8 210(21.11.2013) w ,p 0 |PCT (10) WO 2013/172247 A1 (51) G11B 5/73 (2006.01) C03C 3/085 (2006.01) C03C 3/087 (2006.01) (21) (22) (25) (26) (30) 0: g&ttfiiawii C03C17/06 (2006.01) C03C 21/00 (2006.01) PCT/JP2013/063046 2013 ^5^9 0(09.05.2013) 0*1S (74) ftax: mmmiMmmmpfty-j i X(SIKS & CO.); T 1040031 Tg 8# 7->§• £R^*05iitf JU8 Rt Tokyo (JP). (81) s In: T '—£: 1 61/647,644 2012 ^ 5 M 16 0(16.05.2012) US (71) tti M A : H 0_Y A it (HOYA CORPORA­ TION) [JP/JP]; T 1618525 ^S^§T?S E •\" 2 T I 7§5-^ Tokyo (JP). (72) % BJ #: ^ ^ If H (MATSUMOTO, Naomi); T 1618525 E 4^31 \"n 2TI7#5^ HOYAftStttrt Tokyo (JP). fP BJ (HASHIMOTO, Kazuaki); T 1618525 tin 2TI 7 # 5 HOYASatW Tokyo (JP). (84) (^ro&i^PBy, IS ft BI f £): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. 11^ nlfb): ARIPO (BW, GM, KE, GH, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW), ZL — ^ v 7 (AM, AZ, BY, KG, KZ, RU, TJ, TM), 3 — • V / ^ (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). [&£%] (54) Title: GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATE AND USE FOR SAME [05] BB BB • ^0% &bQX, BB I\" i- AA l> •t CJ CJ l> S-Ji. iilV.jO - =AfcO-i cc AA Fracture toughness value BB Hardening temperature CC Molar ratio (57) Abstract: One embodiment of the present in­ vention relates to glass for a magnetic recording medium substrate, the glass containing, as essen­ tial components, Si02, LiiO, NaiO, and at least one kind of alkaline earth metal oxide selected from the group consisting of MgO, CaO, SrO and BaO, the molar ratio (MgO/ (MgO+CaO+SrO+BaO)) of the amount of MgO included relative to the total amount of MgO, CaO, SrO and BaO included being at least 0.80, and the glass having Young's modulus of a at least 80GPa, and a glass transition temperature of at least 620°C. (57) mm-. mm ft t LT, Si0 2< L i 2 0, Na 0, 2 MgO, CaO, SrO feci: tfBa Ofr bjil&fl-S)— flJii. ±(D7)\s± U±3i&JKBHb!fei££*K M gO, CaO, S r a OO)^ it (MgO/ (MgO + CaO + SrO + B a O) ) ftO. 8 0JJLt, A 8 ? 0GPa Jil±, iS 6 ~7XI_lf]t~ -So WO 2013/172247 A11 lllll llllllll II llllll lllll III lllll III III III lllll lllll llll lllll lllll lllll llll lllllll llll llll
SG11201407592YA 2012-05-16 2013-05-09 Glass for magnetic recording medium substrate and usage thereof SG11201407592YA (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261647644P 2012-05-16 2012-05-16
PCT/JP2013/063046 WO2013172247A1 (en) 2012-05-16 2013-05-09 Glass for magnetic recording medium substrate and use for same

Publications (1)

Publication Number Publication Date
SG11201407592YA true SG11201407592YA (en) 2015-01-29

Family

ID=49583653

Family Applications (2)

Application Number Title Priority Date Filing Date
SG10201605515PA SG10201605515PA (en) 2012-05-16 2013-05-09 Glass for magnetic recording medium substrate and usage thereof
SG11201407592YA SG11201407592YA (en) 2012-05-16 2013-05-09 Glass for magnetic recording medium substrate and usage thereof

Family Applications Before (1)

Application Number Title Priority Date Filing Date
SG10201605515PA SG10201605515PA (en) 2012-05-16 2013-05-09 Glass for magnetic recording medium substrate and usage thereof

Country Status (6)

Country Link
US (2) US8824248B2 (en)
JP (1) JP6147735B2 (en)
CN (1) CN104303231A (en)
MY (1) MY166878A (en)
SG (2) SG10201605515PA (en)
WO (1) WO2013172247A1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
US11319243B2 (en) 2018-01-17 2022-05-03 Corning Incorporated High refractive index optical borate glass

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JP5724779B2 (en) * 2011-09-13 2015-05-27 旭硝子株式会社 Method for measuring strength of chemically strengthened glass, method for reproducing cracks in chemically strengthened glass, and method for producing chemically strengthened glass
WO2013108790A1 (en) * 2012-01-20 2013-07-25 旭硝子株式会社 Cu-In-Ga-Se SOLAR-CELL GLASS SUBSTRATE AND SOLAR CELL USING SAME
US9359251B2 (en) 2012-02-29 2016-06-07 Corning Incorporated Ion exchanged glasses via non-error function compressive stress profiles
US11079309B2 (en) 2013-07-26 2021-08-03 Corning Incorporated Strengthened glass articles having improved survivability
JP6131154B2 (en) * 2013-09-11 2017-05-17 Hoya株式会社 Glass for magnetic recording medium substrate and magnetic recording medium substrate
US10118858B2 (en) 2014-02-24 2018-11-06 Corning Incorporated Strengthened glass with deep depth of compression
DE102014203567B4 (en) * 2014-02-27 2018-04-26 Schott Ag Float method for producing a float glass pane
TW202311197A (en) 2014-06-19 2023-03-16 美商康寧公司 Glasses having non-frangible stress profiles
CN112340984A (en) 2014-10-08 2021-02-09 康宁股份有限公司 Glasses and glass-ceramics comprising a concentration gradient of metal oxides
US10150698B2 (en) 2014-10-31 2018-12-11 Corning Incorporated Strengthened glass with ultra deep depth of compression
TWI726720B (en) 2014-11-04 2021-05-01 美商康寧公司 Deep non-frangible stress profiles and methods of making
US11613103B2 (en) 2015-07-21 2023-03-28 Corning Incorporated Glass articles exhibiting improved fracture performance
US9701569B2 (en) 2015-07-21 2017-07-11 Corning Incorporated Glass articles exhibiting improved fracture performance
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JP6574740B2 (en) 2016-07-08 2019-09-11 昭和電工株式会社 Magnetic recording medium substrate and hard disk drive
CN109923083B (en) * 2016-11-14 2022-07-26 Hoya株式会社 Glass for magnetic recording medium substrate, magnetic recording medium, and glass spacer for magnetic recording/reproducing device
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KR20200055754A (en) * 2017-09-21 2020-05-21 코닝 인코포레이티드 Transparent ion-exchange silicate glass with high fracture toughness
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JP7229357B2 (en) * 2019-07-22 2023-02-27 Hoya株式会社 Glass for magnetic recording medium substrate or glass spacer for magnetic recording/reproducing device, magnetic recording medium substrate, magnetic recording medium, glass spacer for magnetic recording/reproducing device, and magnetic recording/reproducing device
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Also Published As

Publication number Publication date
SG10201605515PA (en) 2016-09-29
US20140036644A1 (en) 2014-02-06
US8824248B2 (en) 2014-09-02
WO2013172247A1 (en) 2013-11-21
CN104303231A (en) 2015-01-21
US9007878B2 (en) 2015-04-14
JP6147735B2 (en) 2017-06-14
MY166878A (en) 2018-07-24
US20140334276A1 (en) 2014-11-13
JPWO2013172247A1 (en) 2016-01-12

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