Patent ID: 8245537

Claim:
A method of producing a glass substrate by press-shaping molten glass, the method comprising: supplying molten glass to a first shaping surface formed on a lower mold; 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 contact the molten glass before the molten glass is pressed, and includes a peripheral section adapted to contact the molten glass after the molten glass has been pressed; and wherein a surface roughness of a peripheral section is greater than a surface roughness of the central section and the molten glass in contact with the greater surface roughness of the peripheral section has a cooling rate faster than the molten glass in contact with the central section, such that the solidification timing of the molten glass in the central and peripheral sections is equalized.