The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2016
Filed:
Nov. 23, 2015
Applicant:
Hoya Corporation, Tokyo, JP;
Inventors:
Assignee:
HOYA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 19/00 (2006.01); C03C 15/02 (2006.01); G11B 5/73 (2006.01); G11B 5/84 (2006.01); C03C 15/00 (2006.01); C03C 23/00 (2006.01); G11B 7/2531 (2013.01); G11B 7/24027 (2013.01); C03C 3/087 (2006.01); G11B 5/127 (2006.01); G11B 5/82 (2006.01);
U.S. Cl.
CPC ...
G11B 5/7315 (2013.01); C03C 3/087 (2013.01); C03C 15/00 (2013.01); C03C 19/00 (2013.01); C03C 23/0075 (2013.01); G11B 5/127 (2013.01); G11B 5/82 (2013.01); G11B 5/8404 (2013.01); G11B 7/24027 (2013.01); G11B 7/2531 (2013.01);
Abstract
The present invention relates to a method for manufacturing a glass substrate for an information recording medium having a high level of cleanness and superior smoothness. The manufacturing method includes a step for washing a disk-shaped glass plate with an acid washing liquid, a step for removing at least part of a surface layer, which is formed on the surface of the glass plate, by performing grinding with diamond abrasion grains, and a step for washing the surface with a neutral or alkaline washing liquid.