Patent ID: 9663396
Date: 2017-05-30
CPC Classifications: C03C,Y10T

Claim:
1. A glass sheet, having one surface and the other surface facing the one surface in a thickness direction, wherein a fluorine concentration in the one surface is higher than the fluorine concentration in the other surface in which the fluorine concentration is an average fluorine concentration (mol %) by SIMS at a depth of 1 to 24 μm, and the following expression (1) is satisfied: wherein ΔF is a value obtained by subtracting an average fluorine concentration (mol %) by SIMS at the depth of 1 to 24 μm in the surface having the lower fluorine concentration from the average fluorine concentration (mol %) by SIMS at the depth of 1 to 24 μm in the surface having the higher fluorine concentration, and ΔH wherein the surface having the higher fluorine concentration does not include a recess having a diameter of 10 nm or more; or wherein the surface having the higher fluorine concentration comprises one or more recesses with a density of 6 recesses/μm