JPWO2021117897A5 - - Google Patents
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- Publication number
- JPWO2021117897A5 JPWO2021117897A5 JP2021564073A JP2021564073A JPWO2021117897A5 JP WO2021117897 A5 JPWO2021117897 A5 JP WO2021117897A5 JP 2021564073 A JP2021564073 A JP 2021564073A JP 2021564073 A JP2021564073 A JP 2021564073A JP WO2021117897 A5 JPWO2021117897 A5 JP WO2021117897A5
- Authority
- JP
- Japan
- Prior art keywords
- mol
- magnetic recording
- glass
- cao
- less
- 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.)
- Granted
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- 239000011521 glass Substances 0.000 claims 15
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims 6
- 125000006850 spacer group Chemical group 0.000 claims 3
- 239000000758 substrate Substances 0.000 claims 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims 1
- 229910052681 coesite Inorganic materials 0.000 claims 1
- 229910052906 cristobalite Inorganic materials 0.000 claims 1
- 230000009477 glass transition Effects 0.000 claims 1
- 230000005484 gravity Effects 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 229910052682 stishovite Inorganic materials 0.000 claims 1
- 229910052905 tridymite Inorganic materials 0.000 claims 1
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023134923A JP7621437B2 (ja) | 2019-12-13 | 2023-08-22 | 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 |
| JP2025004745A JP2025061251A (ja) | 2019-12-13 | 2025-01-14 | 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 |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019225368 | 2019-12-13 | ||
| JP2019225368 | 2019-12-13 | ||
| PCT/JP2020/046405 WO2021117897A1 (ja) | 2019-12-13 | 2020-12-11 | 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 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2023134923A Division JP7621437B2 (ja) | 2019-12-13 | 2023-08-22 | 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 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPWO2021117897A1 JPWO2021117897A1 (https=) | 2021-06-17 |
| JPWO2021117897A5 true JPWO2021117897A5 (https=) | 2023-01-10 |
| JP7383050B2 JP7383050B2 (ja) | 2023-11-17 |
Family
ID=76330058
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2021564073A Active JP7383050B2 (ja) | 2019-12-13 | 2020-12-11 | 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 |
| JP2023134923A Active JP7621437B2 (ja) | 2019-12-13 | 2023-08-22 | 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 |
| JP2025004745A Pending JP2025061251A (ja) | 2019-12-13 | 2025-01-14 | 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 Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2023134923A Active JP7621437B2 (ja) | 2019-12-13 | 2023-08-22 | 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 |
| JP2025004745A Pending JP2025061251A (ja) | 2019-12-13 | 2025-01-14 | 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 |
Country Status (5)
| Country | Link |
|---|---|
| US (3) | US11999652B2 (https=) |
| JP (3) | JP7383050B2 (https=) |
| CN (1) | CN114787093A (https=) |
| MY (1) | MY208742A (https=) |
| WO (1) | WO2021117897A1 (https=) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11081133B2 (en) * | 2016-11-14 | 2021-08-03 | Hoya Corporation | Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium and glass spacer for magnetic recording and reproducing apparatus |
| MY204452A (en) | 2018-05-16 | 2024-08-29 | Hoya Corp | Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium, glass spacer for magnetic recording and reproducing apparatus, and magnetic recording and reproducing apparatus |
| WO2020262702A1 (ja) * | 2019-06-28 | 2020-12-30 | Hoya株式会社 | ガラス板の製造方法および磁気ディスクの製造方法 |
| CN120441191A (zh) * | 2019-07-22 | 2025-08-08 | Hoya株式会社 | 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 |
| 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 |
| WO2023281610A1 (ja) * | 2021-07-05 | 2023-01-12 | Hoya株式会社 | 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 |
| JP7766206B2 (ja) * | 2022-09-08 | 2025-11-07 | 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再生装置 |
| JP2025010844A (ja) * | 2023-07-10 | 2025-01-23 | 日本板硝子株式会社 | 情報記録媒体用ガラス板 |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144732A (ja) * | 1984-08-06 | 1986-03-04 | Toshiba Corp | 基板用ガラス |
| MY118912A (en) * | 1996-09-04 | 2005-02-28 | Hoya Corp | Glass for information recording medium substrate and glass substrate |
| JP3011703B1 (ja) * | 1998-02-26 | 2000-02-21 | 株式会社オハラ | 情報磁気記憶媒体用高剛性ガラスセラミックス基板 |
| JP3022524B1 (ja) | 1998-02-26 | 2000-03-21 | 株式会社オハラ | 情報磁気記憶媒体用高剛性ガラスセラミックス基板 |
| JPH11278865A (ja) * | 1998-03-30 | 1999-10-12 | Ngk Insulators Ltd | 磁気ディスク基板用結晶化ガラス、磁気ディスク用基板、磁気ディスクおよび磁気ディスク基板用結晶化ガラスの製造方法 |
| JP2004288228A (ja) * | 2003-01-31 | 2004-10-14 | Hoya Corp | 情報記録媒体用基板、情報記録媒体およびその製造方法 |
| SG171640A1 (en) * | 2006-06-08 | 2011-06-29 | Hoya Corp | Glass for use in substrate for information recording medium, substrate for information recording medium and information recording medium, and their manufacturing method |
| EP2465828A4 (en) * | 2009-08-10 | 2014-03-26 | Hoya Corp | GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM SUBSTRATE AND METHOD FOR PRODUCING THE SAME, AND MAGNETIC RECORDING MEDIUM |
| SG184235A1 (en) * | 2010-03-31 | 2012-10-30 | Hoya Corp | Method of manufacturing glass blank for magnetic recording medium glass substrate, method of manufacturing magnetic recording medium glass substrate, and method of manufacturing magnetic recording medium |
| US8394516B2 (en) * | 2010-10-29 | 2013-03-12 | Hoya Corporation | Glass substrate for magnetic recording medium and magnetic recording medium |
| US8652660B2 (en) * | 2010-12-21 | 2014-02-18 | Hoya Corporation | Glass substrate for magnetic recording medium and its use |
| SG10201605515PA (en) * | 2012-05-16 | 2016-09-29 | Hoya Corp | Glass for magnetic recording medium substrate and usage thereof |
| EP2857366A1 (en) * | 2012-06-05 | 2015-04-08 | Asahi Glass Company, Limited | Alkali-free glass and method for producing same |
| CN104364215A (zh) * | 2012-06-05 | 2015-02-18 | 旭硝子株式会社 | 无碱玻璃及其制造方法 |
| WO2013183569A1 (ja) * | 2012-06-05 | 2013-12-12 | 旭硝子株式会社 | 磁気ディスクの製造方法および情報記録媒体用ガラス基板 |
| CN103708724B (zh) * | 2012-09-29 | 2017-02-08 | 成都光明光电股份有限公司 | 精密模压用光学玻璃、玻璃预制件、光学元件及光学仪器 |
| JP2015005479A (ja) | 2013-06-24 | 2015-01-08 | 株式会社Ｇｓユアサ | 蓄電素子 |
| CN105517966B (zh) | 2013-09-09 | 2017-12-19 | Hoya株式会社 | 玻璃基板 |
| 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 |
| JP2015224150A (ja) | 2014-05-27 | 2015-12-14 | 旭硝子株式会社 | 無アルカリガラスの製造方法 |
| US11081133B2 (en) * | 2016-11-14 | 2021-08-03 | Hoya Corporation | Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium and glass spacer for magnetic recording and reproducing apparatus |
| 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 |
| MY204452A (en) | 2018-05-16 | 2024-08-29 | Hoya Corp | Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium, glass spacer for magnetic recording and reproducing apparatus, and magnetic recording and reproducing apparatus |
| CN120441191A (zh) * | 2019-07-22 | 2025-08-08 | Hoya株式会社 | 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 |
| 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 |
-
2020
- 2020-12-11 CN CN202080084350.4A patent/CN114787093A/zh active Pending
- 2020-12-11 JP JP2021564073A patent/JP7383050B2/ja active Active
- 2020-12-11 WO PCT/JP2020/046405 patent/WO2021117897A1/ja not_active Ceased
- 2020-12-11 MY MYPI2022002939A patent/MY208742A/en unknown
- 2020-12-11 US US17/784,528 patent/US11999652B2/en active Active
-
2023
- 2023-08-22 JP JP2023134923A patent/JP7621437B2/ja active Active
-
2024
- 2024-05-03 US US18/655,216 patent/US12473225B2/en active Active
-
2025
- 2025-01-14 JP JP2025004745A patent/JP2025061251A/ja active Pending
- 2025-10-29 US US19/373,071 patent/US20260055020A1/en active Pending
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