SG155822A1 - Manufacturing method of glass substrate for magnetic disc - Google Patents
Manufacturing method of glass substrate for magnetic discInfo
- Publication number
- SG155822A1 SG155822A1 SG200807237-3A SG2008072373A SG155822A1 SG 155822 A1 SG155822 A1 SG 155822A1 SG 2008072373 A SG2008072373 A SG 2008072373A SG 155822 A1 SG155822 A1 SG 155822A1
- Authority
- SG
- Singapore
- Prior art keywords
- glass substrate
- polishing
- retention unit
- manufacturing
- gear portion
- Prior art date
Links
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
A manufacturing method of a glass substrate for a magnetic disc includes a polishing step in which an abrasive agent including a loose grain is supplied between a glass substrate and an abrasive pad for polishing a main surface of the glass substrate and a carrier for polishing retaining the glass substrate and the abrasive pad are relatively moved to carry out polishing, wherein the carrier for polishing includes a glass substrate retention unit having a retention hole for retaining the glass substrate and a gear portion provided on an outer circumference of the glass substrate retention unit, the glass substrate retention unit and the gear portion include different materials, thickness of the glass substrate retention unit is between 0.45 and 0.63 times as thick as target thickness of the glass substrate, and thickness of the gear portion is between 1.00 and 1.84 times as thick as the glass substrate retention unit.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008059583A JP5334428B2 (en) | 2008-03-10 | 2008-03-10 | Manufacturing method of glass substrate for magnetic disk |
Publications (1)
Publication Number | Publication Date |
---|---|
SG155822A1 true SG155822A1 (en) | 2009-10-29 |
Family
ID=41186647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SG200807237-3A SG155822A1 (en) | 2008-03-10 | 2008-09-26 | Manufacturing method of glass substrate for magnetic disc |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP5334428B2 (en) |
SG (1) | SG155822A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5635078B2 (en) | 2010-03-31 | 2014-12-03 | Hoya株式会社 | Manufacturing method of glass substrate for magnetic disk |
WO2011125898A1 (en) | 2010-03-31 | 2011-10-13 | Hoya株式会社 | Method for producing glass substrate for magnetic disk |
JP5510030B2 (en) * | 2010-04-26 | 2014-06-04 | 旭硝子株式会社 | Manufacturing method of glass substrate for magnetic recording medium and glass substrate for magnetic recording medium |
JP4973762B2 (en) * | 2010-05-18 | 2012-07-11 | 旭硝子株式会社 | Glass substrate for magnetic recording medium and method for manufacturing the same |
JP2013004730A (en) * | 2011-06-16 | 2013-01-07 | Japan Pionics Co Ltd | Vapor growth device |
WO2013015750A1 (en) * | 2011-07-25 | 2013-01-31 | Hoya Glass Disk (Thailand) Ltd | A method of manufacturing glass substrates for information recording medium |
CN103009242A (en) * | 2011-09-28 | 2013-04-03 | 上海双明光学科技有限公司 | Protection method for processing heavy-caliber ultrathin quartz glass |
JP5654538B2 (en) | 2011-09-30 | 2015-01-14 | Hoya株式会社 | Manufacturing method of glass substrate for magnetic disk and manufacturing method of magnetic disk |
JP2014188668A (en) * | 2013-03-28 | 2014-10-06 | Hoya Corp | Method of manufacturing glass substrate |
WO2015076227A1 (en) * | 2013-11-20 | 2015-05-28 | 旭硝子株式会社 | Glass plate manufacturing method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0655434A (en) * | 1992-04-30 | 1994-03-01 | Shin Etsu Chem Co Ltd | Polishing carrier for glass wafer and its polishing method |
JP2000288920A (en) * | 1999-03-31 | 2000-10-17 | Hoya Corp | Polishing carrier, polishing method, and manufacture of information recording medium substrate |
JP2002100594A (en) * | 2000-09-22 | 2002-04-05 | Komatsu Electronic Metals Co Ltd | Method and device for grinding plane |
JP4384591B2 (en) * | 2004-12-08 | 2009-12-16 | 信越化学工業株式会社 | Surface polishing method |
JP2007276018A (en) * | 2006-04-04 | 2007-10-25 | Sumitomo Electric Ind Ltd | Carrier for both-sided polisher |
-
2008
- 2008-03-10 JP JP2008059583A patent/JP5334428B2/en active Active
- 2008-09-26 SG SG200807237-3A patent/SG155822A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
JP2009214219A (en) | 2009-09-24 |
JP5334428B2 (en) | 2013-11-06 |
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