Title:
PRODUCTION METHOD FOR GLASS SUBSTRATE FOR HDD, GLASS SUBSTRATE FOR HDD, AND MAGNETIC RECORDING MEDIUM FOR HDD
Document Type and Number:
WIPO Patent Application WO/2013/001798
Kind Code:
A1
Abstract:
A production method for a glass substrate for an HDD is configured so as to not leave defects in the outer peripheral edge section of the glass substrate after cleaning and drying. In a cleaning step in the HDD glass substrate production method including the cleaning step in which the glass substrate (50) is cleaned using a cleaning fluid (31), the cleaning fluid (31) is sent in order in a plurality of directions in respect of the glass substrate (50), said directions being mutually different but parallel to the main surface of the glass substrate (50). A cleaning tank (30) comprises cleaning fluid supply and discharge devices (32, 33) in the top and bottom thereof and the cleaning fluid (31) is sent, in respect of the glass substrate (50), alternately and in order in one direction from the bottom to the top and in one direction from the top to the bottom, among the top/bottom directions, inside the cleaning tank (30).
Inventors:
SHIMAZU NORIKO (JP)
FUKUMOTO NAOYUKI (JP)
FUKUMOTO NAOYUKI (JP)
Application Number:
PCT/JP2012/004141
Publication Date:
January 03, 2013
Filing Date:
June 27, 2012
Export Citation:
Assignee:
KONICA MINOLTA ADVANCED LAYERS (JP)
SHIMAZU NORIKO (JP)
FUKUMOTO NAOYUKI (JP)
SHIMAZU NORIKO (JP)
FUKUMOTO NAOYUKI (JP)
International Classes:
G11B5/84; B08B3/04; C03C23/00
Domestic Patent References:
| WO2008068997A1 | 2008-06-12 |
Foreign References:
| JP2008105932A | 2008-05-08 | |||
| JP2010267340A | 2010-11-25 | |||
| JP2006186310A | 2006-07-13 | |||
| JP2001274133A | 2001-10-05 | |||
| JP2003151125A | 2003-05-23 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
Etsuji Kotani (JP)
Etsuji Kotani (JP)
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Claims: