Title:
METHOD OF MANUFACTURING GLASS SUBSTRATE FOR RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2012/086256
Kind Code:
A1
Abstract:
The invention relates to a manufacturing method of a glass substrate for a recording medium using a glass substrate precursor, comprising a step of forming a chemically toughened layer on the surface of the glass substrate precursor, and a step of removing the chemically toughened layer from the recording surface of the glass substrate precursor using a first polishing solution, wherein the first polishing solution comprises water and a first polishing material, the first polishing material comprises CeO2, and the effective amount of CeO2 in the step of removing the chemically toughened layer is between 0.05 to 0.5 µg/cm2.
Inventors:
NAKAE HAZUKI (JP)
Application Number:
PCT/JP2011/068061
Publication Date:
June 28, 2012
Filing Date:
August 08, 2011
Export Citation:
Assignee:
KONICA MINOLTA OPTO INC (JP)
NAKAE HAZUKI (JP)
NAKAE HAZUKI (JP)
International Classes:
G11B5/84; C03C19/00
Domestic Patent References:
| WO2010041536A1 | 2010-04-15 |
Foreign References:
| JP2007217204A | 2007-08-30 | |||
| JP2005174500A | 2005-06-30 |
Attorney, Agent or Firm:
Fukami Patent Office, p. c. (JP)
Patent business corporation Fukami patent firm (JP)
Patent business corporation Fukami patent firm (JP)
Download PDF:
Claims:
Previous Patent: SHOT PROCESS APPARATUS
Next Patent: PROCESS FOR MANUFACTURE OF SILICON CARBIDE SEMICONDUCTOR DEVICE
Next Patent: PROCESS FOR MANUFACTURE OF SILICON CARBIDE SEMICONDUCTOR DEVICE