公开(公告)号：US20230068588A1

公开(公告)日：2023-03-02

申请号：US18053573

申请日：2022-11-08

Applicant: AGC Inc.

Inventor： Kaname SEKIYA ,  Yusuke FUJIWARA

IPC: C03C21/00 ,  C03C3/083 ,  C03C4/18

Abstract: The present invention relates to a chemically strengthened glass having a thickness of t [mm], and having a profile of a stress value CSx [MPa,] at a depth x [µm] from a surface of the glass, the stress value being measured by a scattered-light photoelastic stress meter, in which a second-order differential value CSx" of the stress value CSx in the profile satisfies the following expression within a range of CSx≥0: 0

公开(公告)号：US20200055773A1

公开(公告)日：2020-02-20

申请号：US16660982

申请日：2019-10-23

Applicant: AGC INC.

Inventor： Yusuke FUJIWARA ,  Izuru Kashima ,  Michinori Suehara

IPC: C03C21/00 ,  C03C3/085 ,  C03C3/097

Abstract: The purpose of the present invention is to provide a chemically strengthened glass in which reduction in glass surface strength is effectively suppressed even without performing a polishing treatment after a prolonged chemical strengthening treatment has been conducted at a high temperature. The present invention relates to a chemically strengthened glass having a specific glass composition, wherein: the surface roughness (Ra) is a specific value or greater; the compressive stress layer depth of a surface layer is a specific value or greater; by setting the hydrogen concentration in the glass surface layer to be within a specific range, the surface strength of the glass is dramatically improved even without performing an etching treatment using hydrofluoric acid or polishing the glass surface after a prolonged chemical strengthening treatment has been conducted at a high temperature.