JPWO2023282262A1 - - Google Patents

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Publication number
JPWO2023282262A1
JPWO2023282262A1 JP2023533148A JP2023533148A JPWO2023282262A1 JP WO2023282262 A1 JPWO2023282262 A1 JP WO2023282262A1 JP 2023533148 A JP2023533148 A JP 2023533148A JP 2023533148 A JP2023533148 A JP 2023533148A JP WO2023282262 A1 JPWO2023282262 A1 JP WO2023282262A1
Authority
JP
Japan
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.)
Granted
Application number
JP2023533148A
Other languages
Japanese (ja)
Other versions
JPWO2023282262A5 (https=
JP7811212B2 (ja
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 filed Critical
Publication of JPWO2023282262A1 publication Critical patent/JPWO2023282262A1/ja
Publication of JPWO2023282262A5 publication Critical patent/JPWO2023282262A5/ja
Application granted granted Critical
Publication of JP7811212B2 publication Critical patent/JP7811212B2/ja
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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)
JP2023533148A 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 Active JP7811212B2 (ja)

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

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2026009821A Division JP2026067950A (ja) 2021-07-05 2026-01-23 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

Publications (3)

Publication Number Publication Date
JPWO2023282262A1 true JPWO2023282262A1 (https=) 2023-01-12
JPWO2023282262A5 JPWO2023282262A5 (https=) 2025-07-18
JP7811212B2 JP7811212B2 (ja) 2026-02-04

Family

ID=84800446

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2023533148A Active JP7811212B2 (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

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

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP2003519884A (ja) * 2000-01-05 2003-06-24 ショット、グラス、テクノロジーズ、インコーポレイテッド 磁気媒体用ガラス基材及びそのようなガラス基材に基く磁気媒体
JP2016011232A (ja) * 2014-06-30 2016-01-21 ＡｖａｎＳｔｒａｔｅ株式会社 ガラス基板の製造方法
JP2017165607A (ja) * 2016-03-15 2017-09-21 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
JP2017178711A (ja) * 2016-03-31 2017-10-05 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
WO2017204224A1 (ja) * 2016-05-27 2017-11-30 旭硝子株式会社 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
WO2021117897A1 (ja) * 2019-12-13 2021-06-17 Hoya株式会社 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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP6041004B2 (ja) * 2015-02-09 2016-12-07 旭硝子株式会社 ガラス基板

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003519884A (ja) * 2000-01-05 2003-06-24 ショット、グラス、テクノロジーズ、インコーポレイテッド 磁気媒体用ガラス基材及びそのようなガラス基材に基く磁気媒体
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
JP2016011232A (ja) * 2014-06-30 2016-01-21 ＡｖａｎＳｔｒａｔｅ株式会社 ガラス基板の製造方法
JP2017165607A (ja) * 2016-03-15 2017-09-21 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
JP2017178711A (ja) * 2016-03-31 2017-10-05 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
WO2017204224A1 (ja) * 2016-05-27 2017-11-30 旭硝子株式会社 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
WO2021117897A1 (ja) * 2019-12-13 2021-06-17 Hoya株式会社 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

Also Published As

Publication number Publication date
WO2023282262A1 (ja) 2023-01-12
US20240290350A1 (en) 2024-08-29
JP7811212B2 (ja) 2026-02-04
WO2023281610A1 (ja) 2023-01-12
CN117561225A (zh) 2024-02-13

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