Glass substrate for information recording medium and method for manufacturing the same
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United States of America Patent
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Dec 15, 2015
Grant Date -
Aug 21, 2014
app pub date -
Apr 29, 2014
filing date -
Oct 23, 2002
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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.
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