CN114144384B - 磁记录介质基板用玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置 - Google Patents

磁记录介质基板用玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置 Download PDF

Info

Publication number
CN114144384B
CN114144384B CN202080052827.0A CN202080052827A CN114144384B CN 114144384 B CN114144384 B CN 114144384B CN 202080052827 A CN202080052827 A CN 202080052827A CN 114144384 B CN114144384 B CN 114144384B
Authority
CN
China
Prior art keywords
glass
magnetic recording
less
recording medium
content
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
CN202080052827.0A
Other languages
English (en)
Chinese (zh)
Other versions
CN114144384A (zh
Inventor
佐藤浩一
桥本和明
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
Priority to CN202510529169.4A priority Critical patent/CN120441191A/zh
Publication of CN114144384A publication Critical patent/CN114144384A/zh
Application granted granted Critical
Publication of CN114144384B publication Critical patent/CN114144384B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
    • 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
    • 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
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • 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
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
    • 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
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/038—Centering or locking of a plurality of discs in a single cartridge
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
    • G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
    • G11B23/0028—Details
    • 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/85—Coating a support with a magnetic layer by vapour deposition
    • 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
    • G11B5/851—Coating a support with a magnetic layer by sputtering
    • 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
    • G11B5/858—Producing a magnetic layer by electro-plating or electroless plating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Glass Compositions (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
CN202080052827.0A 2019-07-22 2020-07-22 磁记录介质基板用玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置 Active CN114144384B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202510529169.4A CN120441191A (zh) 2019-07-22 2020-07-22 玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2019134578 2019-07-22
JP2019-134578 2019-07-22
JP2019205993 2019-11-14
JP2019-205993 2019-11-14
PCT/JP2020/028450 WO2021015240A1 (ja) 2019-07-22 2020-07-22 磁気記録媒体基板用ガラス、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

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CN202510529169.4A Division CN120441191A (zh) 2019-07-22 2020-07-22 玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置

Publications (2)

Publication Number Publication Date
CN114144384A CN114144384A (zh) 2022-03-04
CN114144384B true CN114144384B (zh) 2025-05-16

Family

ID=74192987

Family Applications (2)

Application Number Title Priority Date Filing Date
CN202510529169.4A Pending CN120441191A (zh) 2019-07-22 2020-07-22 玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置
CN202080052827.0A Active CN114144384B (zh) 2019-07-22 2020-07-22 磁记录介质基板用玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN202510529169.4A Pending CN120441191A (zh) 2019-07-22 2020-07-22 玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置

Country Status (5)

Country Link
US (3) US11688424B2 (enExample)
JP (3) JP7229357B2 (enExample)
CN (2) CN120441191A (enExample)
MY (1) MY207080A (enExample)
WO (1) WO2021015240A1 (enExample)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6999806B2 (ja) * 2018-05-16 2022-01-19 Hoya株式会社 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
WO2021015240A1 (ja) * 2019-07-22 2021-01-28 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、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
CN114787093A (zh) * 2019-12-13 2022-07-22 豪雅株式会社 磁记录介质基板用或磁记录再生装置用玻璃间隔物用的玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置
US11276716B2 (en) * 2019-12-17 2022-03-15 Taiwan Semiconductor Manufacturing Company, Ltd. Image sensor with improved near-infrared (NIR) radiation phase-detection autofocus (PDAF) performance
WO2022186393A1 (ja) * 2021-03-05 2022-09-09 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
CN116964013A (zh) * 2021-03-05 2023-10-27 豪雅株式会社 磁记录介质基板用玻璃或磁记录再生装置用玻璃间隔物用的玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置
US11851367B1 (en) 2022-02-14 2023-12-26 Corning Incorporated Precursor glasses and glass-ceramics comprising a crystalline phase having a jeffbenite crystalline structure
US11964907B2 (en) * 2022-02-14 2024-04-23 Corning Incorporated Glasses and glass-ceramics, and method of making the same
WO2024053056A1 (ja) * 2022-09-08 2024-03-14 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
EP4585575A1 (en) * 2022-09-08 2025-07-16 Hoya Corporation Glass for magnetic recording medium substrate, magnetic recording medium substrate, and magnetic recording/reproducing apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105517966A (zh) * 2013-09-09 2016-04-20 Hoya株式会社 玻璃基板

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6332338B1 (en) * 1997-07-30 2001-12-25 Hoya Corporation Method of producing glass substrate for information recording medium
SG98415A1 (en) * 1999-07-07 2003-09-19 Hoya Corp Process for preparation of crystallized glass for information recording disk
US6627565B1 (en) * 1999-07-27 2003-09-30 Hoya Corporation Crystallized glass substrate for information recording medium
AU7316500A (en) * 1999-09-21 2001-04-24 Kabushiki Kaisha Ohara Holding member for information storage disk and information storage disk drive device
JP4785274B2 (ja) 2001-05-29 2011-10-05 日本板硝子株式会社 ガラス物品およびそれを用いた磁気記録媒体用ガラス基板
JP4446683B2 (ja) * 2002-05-24 2010-04-07 Ｈｏｙａ株式会社 磁気記録媒体用ガラス基板
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
US20130126334A1 (en) * 2010-08-31 2013-05-23 Yoshihiro Tawara Method for producing glass substrate for magnetic disks, and method for producing magnetic disk
SG183091A1 (en) * 2011-01-07 2012-09-27 Asahi Glass Co Ltd Glass substrate for information recording media, process for its production, and magnetic recording medium
SG195059A1 (en) * 2011-06-30 2013-12-30 Hoya Corp Glass substrate for magnetic disk and method for manufacturing same
SG10201605515PA (en) * 2012-05-16 2016-09-29 Hoya Corp Glass for magnetic recording medium substrate and usage thereof
JP6131154B2 (ja) * 2013-09-11 2017-05-17 Hoya株式会社 磁気記録媒体基板用ガラスおよび磁気記録媒体基板
JP6793119B2 (ja) * 2015-06-30 2020-12-02 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磁気記録媒体
CN108137380B (zh) * 2015-10-05 2021-08-03 Ａｇｃ株式会社 数据存储介质基板用玻璃、数据存储介质用玻璃基板以及磁盘
CN115072991B (zh) * 2016-11-14 2024-07-19 Hoya株式会社 磁记录介质基板用玻璃、磁记录介质基板、磁记录介质和磁记录再生装置用玻璃间隔物
JP7165655B2 (ja) 2017-06-09 2022-11-04 Hoya株式会社 情報記録媒体基板用ガラス、情報記録媒体基板、情報記録媒体および記録再生装置用ガラススペーサ
JP7276645B2 (ja) * 2017-08-08 2023-05-18 日本電気硝子株式会社 磁気記録媒体用ガラス基板
JP6999806B2 (ja) * 2018-05-16 2022-01-19 Hoya株式会社 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
CN113412242A (zh) * 2019-02-07 2021-09-17 Ａｇｃ株式会社 无碱玻璃
WO2021015240A1 (ja) * 2019-07-22 2021-01-28 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、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
CN114787093A (zh) * 2019-12-13 2022-07-22 豪雅株式会社 磁记录介质基板用或磁记录再生装置用玻璃间隔物用的玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105517966A (zh) * 2013-09-09 2016-04-20 Hoya株式会社 玻璃基板

Also Published As

Publication number Publication date
CN114144384A (zh) 2022-03-04
US11688424B2 (en) 2023-06-27
WO2021015240A1 (ja) 2021-01-28
MY207080A (en) 2025-01-29
JP7559105B2 (ja) 2024-10-01
US20230306996A1 (en) 2023-09-28
US12211533B2 (en) 2025-01-28
JPWO2021015240A1 (enExample) 2021-01-28
JP2023065457A (ja) 2023-05-12
JP7748523B2 (ja) 2025-10-02
JP2024170658A (ja) 2024-12-10
US20250140290A1 (en) 2025-05-01
JP7229357B2 (ja) 2023-02-27
US20220277768A1 (en) 2022-09-01
CN120441191A (zh) 2025-08-08

Similar Documents

Publication Publication Date Title
CN114144384B (zh) 磁记录介质基板用玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置
JP7734777B2 (ja) 磁気記録媒体基板用ガラス、磁気記録媒体基板、磁気記録媒体および磁気記録再生装置用ガラススペーサ
JP5964921B2 (ja) 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
JP7621437B2 (ja) 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
JP7165655B2 (ja) 情報記録媒体基板用ガラス、情報記録媒体基板、情報記録媒体および記録再生装置用ガラススペーサ
JP2024102290A (ja) 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
WO2017002835A1 (ja) 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録媒体
JP7709621B2 (ja) 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
JP7766206B2 (ja) 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置
JP7389545B2 (ja) 磁気記録媒体基板用ガラス、磁気記録媒体基板、磁気記録媒体
JP2025183389A (ja) 磁気記録媒体基板用ガラス、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
CN116964013A (zh) 磁记录介质基板用玻璃或磁记录再生装置用玻璃间隔物用的玻璃、磁记录介质基板、磁记录介质、磁记录再生装置用玻璃间隔物和磁记录再生装置

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant