Glass substrate for flat panel display and method for manufacturing same

A glass substrate for a display comprising SiO2, Al2O3, B2O3, RO and R2O,

• the glass having a mass ratio (SiO2+Al2O3)/B2O3 of 9.8-30, and a mass ratio CaO/B2O3 equal to or greater than 0.9,
• the glass substrate being comprised of a glass comprising
• 52-78 mass % of SiO2,
• 3-25 mass % of Al2O3,
• 3-20 mass % of RO, wherein RO is total amount of MgO, CaO, SrO, and BaO,
• 0.01-0.8 mass % of R2O, wherein R2O is total amount of Li2O, Na2O, and K2O, and
• 0-0.3 mass % of Sb2O3, and
• the content of B2O3 is in a range in which the glass exhibits a devitrification temperature equal to or lower than 1250° C. and equal to or lower than 11.3 mass %
• substantially not comprising As2O3,
• wherein the heat shrinkage rate after performing a heat treatment in which the temperature is raised and lowered at a rate of 10° C./min and is kept at 550° C. for 2 hours is equal to or less than 75 ppm, the heat shrinkage rate being expressed by the following equation:
• Heat shrinkage rate (ppm)={Amount of shrinkage of glass before and after heat treatment/Length of glass before heat treatment}×106, and
• wherein the glass exhibits a strain point equal to or greater than 695° C.