Mold for glass substrate molding, method, for producing glass substrate, method for producing glass substrate for information recording medium, and method for producing information recording medium

A mold for producing a glass substrate comprising:

• a lower mold having a first shaping surface to press a supplied molten glass;
• and
• an upper mold having a second shaping surface to press the molten glass between the first shaping surface and the second shaping surface;
• wherein the first shaping surface includes a central section adapted to come in contact with the molten glass before the molten glass is pressed and a peripheral section adapted to come in contact with the molten glass after the molten glass has been pressed, and
• wherein a surface roughness of the peripheral section is greater than that of the central section.

A method of producing a glass substrate comprising:

• supplying a molten glass to a first shaping surface formed on a lower mold;
• and
• cooling the molten glass supplied onto the first shaping surface while pressing the molten glass between the first shaping surface and a second shaping surface formed on an upper mold so that the molten glass is shaped into a glass substrate;
• wherein the first shaping surface includes a central section adapted to come in contact with the molten glass before the molten glass is pressed and a peripheral section adapted to come in contact with the molten glass after the molten glass has been pressed, and
• wherein a surface roughness of a peripheral section is greater than that of the central section.