| abstract |
The present invention relates to a glass plate which is one in which the fluorine concentration on one side of the opposite side in the thickness direction is greater than the fluorine concentration on the other side, and satisfies the following formula (1), and is on the horizontal axis and the vertical axis The fluorine concentration (mol%) is determined by secondary ion mass spectrometry (SIMS) in the depth direction distribution, the amount of fluorine contained in the glass is greater than 0.23 mol%. Mm and 21mol%. Below μm. Here, the fluorine concentration is an average fluorine concentration (mol%) obtained by SIMS with a depth of 1 to 24 μm.n0.1≦△F/△H2O...(1)n(△F and △H2O are described in the specification) |