CN117561225A - 玻璃板、圆板状玻璃、磁盘用玻璃基板及玻璃板的制造方法 - Google Patents

玻璃板、圆板状玻璃、磁盘用玻璃基板及玻璃板的制造方法 Download PDF

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Publication number
CN117561225A
CN117561225A CN202280045487.8A CN202280045487A CN117561225A CN 117561225 A CN117561225 A CN 117561225A CN 202280045487 A CN202280045487 A CN 202280045487A CN 117561225 A CN117561225 A CN 117561225A
Authority
CN
China
Prior art keywords
glass
glass plate
less
flatness
plate
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202280045487.8A
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English (en)
Chinese (zh)
Inventor
桥本和明
玉置将德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoya Corp
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 CN117561225A publication Critical patent/CN117561225A/zh
Pending legal-status Critical Current

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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
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B25/00—Annealing glass products
    • C03B25/02—Annealing glass products in a discontinuous way
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B25/00—Annealing glass products
    • C03B25/02—Annealing glass products in a discontinuous way
    • C03B25/025—Glass sheets
    • 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
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)
CN202280045487.8A 2021-07-05 2022-07-05 玻璃板、圆板状玻璃、磁盘用玻璃基板及玻璃板的制造方法 Pending CN117561225A (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JPPCT/JP2021/025369 2021-07-05
PCT/JP2021/025369 WO2023281610A1 (ja) 2021-07-05 2021-07-05 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
PCT/JP2022/026729 WO2023282262A1 (ja) 2021-07-05 2022-07-05 ガラス板、円板状ガラス、磁気ディスク用ガラス基板、およびガラス板の製造方法

Publications (1)

Publication Number Publication Date
CN117561225A true CN117561225A (zh) 2024-02-13

Family

ID=84800446

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202280045487.8A Pending CN117561225A (zh) 2021-07-05 2022-07-05 玻璃板、圆板状玻璃、磁盘用玻璃基板及玻璃板的制造方法

Country Status (4)

Country Link
US (1) US20240290350A1 (https=)
JP (1) JP7811212B2 (https=)
CN (1) CN117561225A (https=)
WO (2) WO2023281610A1 (https=)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025239331A1 (ja) * 2024-05-15 2025-11-20 Hoya株式会社 磁気ディスク、磁気ディスク基板、磁気ディスク基板の使用及び磁気ディスクの製造方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001050464A1 (en) * 2000-01-05 2001-07-12 Schott Glass Technologies, Inc. Glass substrates for magnetic media and magnetic media based on such glass substrates
JP2002003240A (ja) * 2000-06-19 2002-01-09 Nippon Electric Glass Co Ltd 液晶ディスプレイ用ガラス基板
JP4430806B2 (ja) * 2000-09-14 2010-03-10 Ｈｏｙａ株式会社 結晶化ガラスの製造方法、結晶化ガラス基板の製造方法、および情報記録媒体の製造方法
JP4834654B2 (ja) * 2007-12-21 2011-12-14 Ｈｏｙａ株式会社 肉薄ガラスの製造方法、ガラス成形品の製造装置、情報記録媒体用ガラス基板の製造方法、光学部品の製造方法
US8885447B2 (en) * 2012-03-29 2014-11-11 Hoya Corporation Glass for magnetic recording medium substrate, glass substrate for magnetic recording medium, and their use
US8896964B1 (en) * 2013-05-16 2014-11-25 Seagate Technology Llc Enlarged substrate for magnetic recording medium
JP2016011232A (ja) * 2014-06-30 2016-01-21 ＡｖａｎＳｔｒａｔｅ株式会社 ガラス基板の製造方法
JP6041004B2 (ja) * 2015-02-09 2016-12-07 旭硝子株式会社 ガラス基板
JP6315011B2 (ja) * 2016-03-15 2018-04-25 旭硝子株式会社 無アルカリガラス基板、および無アルカリガラス基板の製造方法
JP6757159B2 (ja) * 2016-03-31 2020-09-16 ＡｖａｎＳｔｒａｔｅ株式会社 磁気記録媒体用ガラス基板及びその製造方法
JP7103219B2 (ja) * 2016-05-27 2022-07-20 Ａｇｃ株式会社 磁気記録媒体用ガラス、磁気記録媒体用ガラス基板および磁気ディスク
MY208742A (en) * 2019-12-13 2025-05-27 Hoya Corp 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

Also Published As

Publication number Publication date
WO2023282262A1 (ja) 2023-01-12
US20240290350A1 (en) 2024-08-29
JP7811212B2 (ja) 2026-02-04
JPWO2023282262A1 (https=) 2023-01-12
WO2023281610A1 (ja) 2023-01-12

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