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:
Jun. 10, 2008
Filed:
May. 29, 2003
Yasuhiro Saito, Osaka, JP;
Kazuishi Mitani, Osaka, JP;
Yasuhiro Saito, Osaka, JP;
Kazuishi Mitani, Osaka, JP;
Hoya Corporation, , JP;
Abstract
A method for providing a high quality glass substrate that if free of residual polishing particles. The method includes polishing the surface of the glass plate with a polishing agent containing cerium oxide particles, washing the glass plate with washing agent containing the three components of acid, a reducing agent, and fluorine ion. The washing agent is provided with an etching effect by the acid, a reducing and decomposing effect by the reducing agent, and a dissolving enhancing effect by the cerium oxide by fluorine ion. The synergistic effect of the three components provides the washing agent with an extremely high ability for washing away cerium oxide and foreign matter from the surface of the glass plate through a small amount of etching such that potential scratches are not produced.