Title:
POLISHING BRUSH, POLISHING METHOD, POLISHING DEVICE, AND METHOD OF MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK
Document Type and Number:
WIPO Patent Application WO/2007/037302
Kind Code:
A1
Abstract:
A polishing brush adapted for a method for polishing a disk-like glass substrate
having a circular hole at its center, where the polishing is made by rotating the
brush while it is made to be in contact with an end surface on the inner circumference
side of the glass substrate and while polishing liquid is supplied to the portion
of the end surface. The polishing brush (20) has bristles (22) fitted projecting
in the direction substantially perpendicular to the axis (21) of the brush (20).
Those portions of the brush that have two different diameters D1 and D2 are alternately
arranged in the axial direction, and the bristles of the portions having the small
diameter D2 have higher hardness than those of the portions having the large diameter
D1. For this purpose, the bristles of the portions with the small diameter D2 of
the polishing brush (20) are stiffened with resin.
Inventors:
KASHIMA RYUICHI (JP)
UEDA MASAAKI (JP)
SHIGETA FUMIHIKO (JP)
UEDA MASAAKI (JP)
SHIGETA FUMIHIKO (JP)
Application Number:
PCT/JP2006/319245
Publication Date:
April 05, 2007
Filing Date:
September 28, 2006
Export Citation:
Assignee:
HOYA CORP (JP)
KASHIMA RYUICHI (JP)
UEDA MASAAKI (JP)
SHIGETA FUMIHIKO (JP)
KASHIMA RYUICHI (JP)
UEDA MASAAKI (JP)
SHIGETA FUMIHIKO (JP)
International Classes:
B24D13/10; B24B9/00; B24B29/00; G11B5/84
Foreign References:
| JP2000185927A | 2000-07-04 | |||
| JPS63113560U | 1988-07-21 | |||
| JPH059861U | 1993-02-09 | |||
| JP2000033575A | 2000-02-02 | |||
| JPH09131654A | 1997-05-20 | |||
| JPH11198012A | 1999-07-27 | |||
| JPH10189508A | 1998-07-21 | |||
| JPS62162475A | 1987-07-18 |
Attorney, Agent or Firm:
IKEDA, Noriyasu et al. (4-10 Nishishinbashi 1-chom, Minato-ku Tokyo 03, JP)
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