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1. (WO2013146441) GLASS SHEET CAPABLE OF BEING INHIBITED FROM WARPING THROUGH CHEMICAL STRENGTHENING

Pub. No.:    WO/2013/146441    International Application No.:    PCT/JP2013/057728
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Tue Mar 19 00:59:59 CET 2013
IPC: C03C 23/00
C03C 21/00
Applicants: ASAHI GLASS COMPANY, LIMITED
旭硝子株式会社
Inventors: OKAHATA Naoki
岡畑 直樹
NAKAGAWA Koji
中川 浩司
YAMANAKA Kazuhiko
山中 一彦
WATANABE Kunio
渡邉 邦夫
TANII Shiro
谷井 史朗
IKAWA Nobuaki
井川 信彰
KOBAYASHI Daisuke
小林 大介
MIYASHITA Junichi
宮下 純一
KATO Ryosuke
加藤 亮祐
NIHEI Toshifumi
仁平 敏史
SERA Yoichi
世良 洋一
HAYASHI Yasuo
林 泰夫
FUKAWA Makoto
府川 真
Title: GLASS SHEET CAPABLE OF BEING INHIBITED FROM WARPING THROUGH CHEMICAL STRENGTHENING
Abstract:
The purpose of the present invention is to provide a glass sheet which can be effectively inhibited from warping through chemical strengthening and which enables polishing, etc., as treatments to be conducted before chemical strengthening, to be omitted or simplified. The invention relates to a glass sheet which, when analyzed with a secondary-ion mass spectrometer (SIMS), gives depth-direction profiles in which the abscissa is depth and the ordinate is F/Si intensity ratio, wherein the average value of the depth-direction profile in the depth range of 0-20 µm of one surface is larger than the average value of the depth-direction profile in the depth range of 0-20 µm of the other surface, the ratio of the two values being higher than 1.4.