Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR INFORMATION RECORDING MEDIUM, AND INFORMATION RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2012/090568
Kind Code:
A1
Abstract:
There is provided a method for manufacturing a glass substrate for an information recording medium according to which the surface state of an end surface of a glass substrate can be made highly smooth. The method for manufacturing a glass substrate for an information recording medium, in which a magnetic recording layer is formed on a surface of a circular disc-shaped glass substrate (1), comprises: a step for forming the glass substrate (1); and a step for feeding a polishing liquid (50) containing free abrasive grains onto the end surface of the glass substrate (1), bringing a rotating brush (4) into contact with the end surface while causing the rotating brush to rotate, and polishing the end surface. The rotating brush (4) has a rotation shaft and a plurality of blades (43) that are mounted radially on an outer surface of the rotation shaft and that extend in the axial direction. Spacings are formed between blades (43) that are adjacent to each other in the circumferential direction of the rotation shaft of the rotating brush (4).

Inventors:
FUKUMOTO NAOYUKI (JP)
NISHI KAZUYUKI (JP)
ENDO TAKESHI (JP)
MINAMI SHINJI (JP)
Application Number:
PCT/JP2011/073087
Publication Date:
July 05, 2012
Filing Date:
October 06, 2011
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KONICA MINOLTA OPTO INC (JP)
FUKUMOTO NAOYUKI (JP)
NISHI KAZUYUKI (JP)
ENDO TAKESHI (JP)
MINAMI SHINJI (JP)
International Classes:
G11B5/84; B24B5/12; B24B9/00; B24B29/00; B24B29/04; C03C19/00
Foreign References:
JP2010214534A2010-09-30
JP2010086633A2010-04-15
JP2006236561A2006-09-07
Attorney, Agent or Firm:
Fukami Patent Office, p. c. (JP)
Patent business corporation Fukami patent firm (JP)
Download PDF:
Claims: