PH12012000100A1 - Method for producing glass substrate for magnetic recording medium and glass substrate for magnetic recording medium - Google Patents
Method for producing glass substrate for magnetic recording medium and glass substrate for magnetic recording mediumInfo
- Publication number
- PH12012000100A1 PH12012000100A1 PH1/2012/000100A PH12012000100A PH12012000100A1 PH 12012000100 A1 PH12012000100 A1 PH 12012000100A1 PH 12012000100 A PH12012000100 A PH 12012000100A PH 12012000100 A1 PH12012000100 A1 PH 12012000100A1
- Authority
- PH
- Philippines
- Prior art keywords
- glass substrate
- recording medium
- magnetic recording
- producing
- polishing
- Prior art date
Links
- 239000011521 glass Substances 0.000 title abstract 8
- 239000000758 substrate Substances 0.000 title abstract 8
- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 238000005498 polishing Methods 0.000 abstract 5
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000002386 leaching Methods 0.000 abstract 1
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Magnetic Record Carriers (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Provided is a method for producing a glass substrate for a magnetic recording medium that prevents adhesion of the glass substrate to the polishing pad of the upper platen and generation of leaching marks on the glass substrate and exhibilts superior uniform flatness and smoothnness in the plane of the main surface. The method for producing a glass substrate for a magnetic recording medium includes a shape-forming step of glass substrate; a main surface polishing step of the glass substrate; and a cleaning step, in which an effective area ration of a polishing surface of the poilishing pad (A-B)/Ax100) is 75 to 98% for an upper polishing pad and is 99% or more (more preferably 100%) for a lower polishing pad.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011104270A JP5853408B2 (en) | 2011-05-09 | 2011-05-09 | Manufacturing method of glass substrate for magnetic recording medium and glass substrate for magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PH12012000100A1 true PH12012000100A1 (en) | 2013-12-09 |
Family
ID=47434767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PH1/2012/000100A PH12012000100A1 (en) | 2011-05-09 | 2012-05-03 | Method for producing glass substrate for magnetic recording medium and glass substrate for magnetic recording medium |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5853408B2 (en) |
| PH (1) | PH12012000100A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013031909A (en) * | 2011-08-03 | 2013-02-14 | Seiko Instruments Inc | Method for polishing glass substrate, method for manufacturing package, piezoelectric vibrator, oscillator, electronic apparatus and radio-controlled timepiece |
| KR101455919B1 (en) | 2013-01-18 | 2014-11-03 | 주식회사 엘지실트론 | Structure of Lapping Plate in Double Side Lapping Apparatus For Silicon Wafer |
| CN108564969B (en) * | 2013-02-08 | 2019-08-23 | Hoya株式会社 | The manufacturing method of substrate for magnetic disc and the grinding pad used in the manufacture of substrate for magnetic disc |
| JP2014154187A (en) * | 2013-02-08 | 2014-08-25 | Asahi Glass Co Ltd | Manufacturing method of glass substrate for magnetic recording medium, and glass substrate for magnetic recording medium |
| WO2015152316A1 (en) | 2014-03-31 | 2015-10-08 | Hoya株式会社 | Magnetic disk-use glass substrate |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11233462A (en) * | 1998-02-09 | 1999-08-27 | Naoetsu Electronics Co Ltd | Both surfaces polishing method of semiconductor wafer |
| JP4593643B2 (en) * | 2008-03-12 | 2010-12-08 | 東洋ゴム工業株式会社 | Polishing pad |
| JPWO2009157306A1 (en) * | 2008-06-25 | 2011-12-08 | 旭硝子株式会社 | Double-side polishing apparatus, polishing method and manufacturing method for glass substrate for magnetic disk |
| JP5407693B2 (en) * | 2009-09-17 | 2014-02-05 | 旭硝子株式会社 | Glass substrate manufacturing method, polishing method and polishing apparatus, and glass substrate |
-
2011
- 2011-05-09 JP JP2011104270A patent/JP5853408B2/en not_active Expired - Fee Related
-
2012
- 2012-05-03 PH PH1/2012/000100A patent/PH12012000100A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JP5853408B2 (en) | 2016-02-09 |
| JP2012234604A (en) | 2012-11-29 |
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