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:
Nov. 28, 2006
Filed:
Jan. 17, 2003
Yasuhiro Saito, Osaka, JP;
Kazuishi Mitani, Osaka, JP;
Tatsuro Umeyama, Osaka, JP;
Koji Okuhata, Osaka, JP;
Toshiaki Hashimoto, Osaka, JP;
Yasuhiro Saito, Osaka, JP;
Kazuishi Mitani, Osaka, JP;
Tatsuro Umeyama, Osaka, JP;
Koji Okuhata, Osaka, JP;
Toshiaki Hashimoto, Osaka, JP;
Hoya Corporation, Tokyo, JP;
Abstract
Provided is a method for manufacturing a glass substrate for an information recording medium, which is advantageous in that oozing of an alkali and deformation of a texture are suppressed. The glass substrate is chemically reinforced, and a texture is formed in the glass substrate, and then treated with a neutral or alkaline aqueous solution. In the texture forming step, the surface of the glass substrate is etched in a depth of 0.5 to 10 nm.