Production method of glass baseplate for record medium, glass baseplate for record medium, record medium and retention jig

摘要

This invention holds down the adhesion of the foreign material to the glass baseplate at the time of chemical strengthening, offers the production method of the glass baseplate whose efficiency is good. Because of this, when the glass baseplate is kept in the retention jig, it soaks in the chemical water and alkali salt and the aforementioned retention jig consists of the component which designates the metal which possesses the alkaline metal element as the material the alkaline metal ion of bigger ion diameter than the aforementioned alkaline metal ion to which the aforementioned chemical water and alkali salt includes the alkaline metal ion of the surface of the aforementioned glass baseplate, in the production method of the glass baseplate for record medium which possesses the chemical strengthening process which is substituted, or, from use start beginning with the aforementioned chemical strengthening process, it has the metal membrane which possesses the alkaline metal element which covers the surface of the said retention jig.