Title:
A regeneration method of used polish slurry, a manufacturing method of the glass substrate for magnetic disks
Document Type and Number:
Japanese Patent JP6204506
Kind Code:
B2
Abstract:
Provided is a regenerating method for used polishing slurry that can sufficiently crush solid content generated by way of centrifugal separation of used polishing slurry, and can thereby suppress damage from occurring to a glass substrate during the polishing process. One embodiment of the present invention is a regenerating method for used polishing slurry containing abrasive particles used in the polishing process for glass substrates, wherein the method comprises a step of forming a mixture by adding a saccharide to the used polishing slurry, a step of removing at least a portion of the glass component contained in the mixture by centrifugal separation of the mixture, and a step of crushing the solid content obtained by the centrifugal separation.
Inventors:
Kyosuke Iizumi
Tamaki Masanori
Tamaki Masanori
Application Number:
JP2015560071A
Publication Date:
September 27, 2017
Filing Date:
February 02, 2015
Export Citation:
Assignee:
HOYA CORPORATION
International Classes:
B24B57/02; C02F11/14
Domestic Patent References:
| JP2001009723A | ||||
| JP2007098485A | ||||
| JP2004306210A | ||||
| JP2011011307A | ||||
| JP2001192645A | ||||
| JP2008546548A |
Foreign References:
| EP1561557B1 |
Attorney, Agent or Firm:
Global IP Tokyo Patent Business Corporation