公开(公告)号：US20220112125A1

公开(公告)日：2022-04-14

申请号：US17556137

申请日：2021-12-20

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.