JPWO2023100893A1 - - Google Patents
Info
- Publication number
- JPWO2023100893A1 JPWO2023100893A1 JP2023565025A JP2023565025A JPWO2023100893A1 JP WO2023100893 A1 JPWO2023100893 A1 JP WO2023100893A1 JP 2023565025 A JP2023565025 A JP 2023565025A JP 2023565025 A JP2023565025 A JP 2023565025A JP WO2023100893 A1 JPWO2023100893 A1 JP WO2023100893A1
- 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.)
- Pending
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
- 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
-
- 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
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
- G11B5/82—Disk 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
-
- 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)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Glass Compositions (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021195306 | 2021-12-01 | ||
| PCT/JP2022/044030 WO2023100893A1 (ja) | 2021-12-01 | 2022-11-29 | 磁気記録媒体用ガラス基板、磁気記録媒体用ガラスディスク、磁気記録媒体及びガラスディスクの製造方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPWO2023100893A1 true JPWO2023100893A1 (https=) | 2023-06-08 |
Family
ID=86612208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2023565025A Pending JPWO2023100893A1 (https=) | 2021-12-01 | 2022-11-29 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250263325A1 (https=) |
| JP (1) | JPWO2023100893A1 (https=) |
| CN (1) | CN118284935A (https=) |
| WO (1) | WO2023100893A1 (https=) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025143137A1 (ja) * | 2023-12-27 | 2025-07-03 | Hoya株式会社 | 情報記録媒体用ディスク |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017052661A (ja) * | 2015-09-08 | 2017-03-16 | 旭硝子株式会社 | 磁気記録媒体用ガラス、磁気記録媒体用化学強化ガラス、磁気記録媒体用ガラス基板、及び磁気記録媒体 |
| MY208527A (en) * | 2018-08-07 | 2025-05-14 | Hoya Corp | Substrate for magnetic disk and magnetic disk |
| CN114096491A (zh) * | 2019-06-19 | 2022-02-25 | 康宁公司 | 含氧化钇的玻璃基板 |
| JP7506848B2 (ja) * | 2019-11-05 | 2024-06-27 | 日本電気硝子株式会社 | 紫外線透過ガラス |
| JP7392909B2 (ja) * | 2019-11-25 | 2023-12-06 | 日本電気硝子株式会社 | 磁気記録媒体用ガラス基板及びそれを用いた磁気記録装置 |
-
2022
- 2022-11-29 JP JP2023565025A patent/JPWO2023100893A1/ja active Pending
- 2022-11-29 US US18/706,446 patent/US20250263325A1/en active Pending
- 2022-11-29 CN CN202280077269.2A patent/CN118284935A/zh active Pending
- 2022-11-29 WO PCT/JP2022/044030 patent/WO2023100893A1/ja not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| US20250263325A1 (en) | 2025-08-21 |
| WO2023100893A1 (ja) | 2023-06-08 |
| CN118284935A (zh) | 2024-07-02 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20251001 |