Title:
METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR HARD DISK
Document Type and Number:
WIPO Patent Application WO/2014/115495
Kind Code:
A1
Abstract:
One aspect of the present invention pertains to a method for manufacturing a glass substrate for a hard disk, the method being provided with a polishing step for polishing the glass substrate using a polishing slurry that contains abrasive particles, wherein the method is characterized in that a polishing slurry obtained by mixing a polishing slurry (A), which contains a group of abrasive particles (A) having a prescribed average particle diameter and a dispersant most suitable for the group of particles (A), and a polishing slurry (B), which contains a group of abrasive particles (B) having a larger average particle diameter than the group of particles (A) and a dispersant most suitable for the group of particles (B), is used to polish the glass substrate in the polishing step.
Inventors:
TSUKADA KAZUYA (JP)
Application Number:
PCT/JP2014/000067
Publication Date:
July 31, 2014
Filing Date:
January 10, 2014
Export Citation:
Assignee:
HOYA CORP (JP)
International Classes:
G11B5/84; B24B37/00; B24B37/24
Foreign References:
| JP2001323254A | 2001-11-22 | |||
| JP2005187664A | 2005-07-14 | |||
| JP2012209010A | 2012-10-25 | |||
| JP2010192041A | 2010-09-02 | |||
| JP2007321159A | 2007-12-13 | |||
| JP2004253058A | 2004-09-09 | |||
| JP2001288455A | 2001-10-16 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
Etsuji Kotani (JP)
Etsuji Kotani (JP)
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