JP7811212B2 - 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 - Google Patents

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

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Publication number
JP7811212B2
JP7811212B2 JP2023533148A JP2023533148A JP7811212B2 JP 7811212 B2 JP7811212 B2 JP 7811212B2 JP 2023533148 A JP2023533148 A JP 2023533148A JP 2023533148 A JP2023533148 A JP 2023533148A JP 7811212 B2 JP7811212 B2 JP 7811212B2
Authority
JP
Japan
Prior art keywords
glass
glass plate
thermal shrinkage
less
heat treatment
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.)
Active
Application number
JP2023533148A
Other languages
English (en)
Japanese (ja)
Other versions
JPWO2023282262A5 (https=
JPWO2023282262A1 (https=
Inventor
和明 橋本
将徳 玉置
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 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 JPWO2023282262A1 (https=) 2023-01-12
JPWO2023282262A5 JPWO2023282262A5 (https=) 2025-07-18
JP7811212B2 true 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
JPWO2023282262A1 (https=) 2023-01-12
WO2023281610A1 (ja) 2023-01-12
CN117561225A (zh) 2024-02-13

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