| abstract |
A glass sheet has one surface and the other surface facing the one surface in a thickness direction, wherein a fluorine concentration (average fluorine concentration by SIMS at a depth of 1 to 24 μm) in the one surface is higher than that in the other surface. The following expression is satisfied: 0.07≦ΔF/ΔH 2 O. ΔF (mol %) is a value obtained by subtracting an average fluorine concentration in the surface having the lower fluorine concentration from that in the surface having the higher fluorine concentration, and ΔH 2 O (mol %) is an absolute value of a value obtained by subtracting an average H 2 O concentration in the surface having the higher fluorine concentration from that in the surface having the lower fluorine concentration. |