GLASS SHEET
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United States of America Patent
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app pub date -
Mar 24, 2016
filing date -
Sep 25, 2013
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Abstract
The present invention relates to a glass sheet having a fluorine concentration at one surface larger than a fluorine concentration at the other surface, the surfaces being opposite to each other in a thickness direction, in which the following Formula (1) is satisfied and the amount of fluorine contained in the glass is more than 0.23 mol %·μm and 21 mol %·μm or less on a depth-direction profile by secondary ion mass spectrometry (SIMS) in which a horizontal axis expresses depth and a vertical axis expresses fluorine concentration (mol %). The fluorine concentration is an average fluorine concentration (mol %) by SIMS in the depth of from 1 to 24 μm.
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