公开(公告)号：US20220009830A1

公开(公告)日：2022-01-13

申请号：US17487421

申请日：2021-09-28

Applicant: AGC INC.

Inventor： Izuru KASHIMA ,  Kaname SEKIYA ,  Akio SHIZUKAI ,  Yositeru IKEDA ,  Shogo SUEDA

IPC: C03C21/00 ,  C03C3/087 ,  C03C3/093 ,  C03C3/095 ,  C03C3/097

Abstract: The present invention relates to a method for producing a chemically strengthened glass, the method including, performing a chemical strengthening treatment including the following steps (1) to (3) to a glass having a specific composition, (1) a step of bringing the glass into contact with an inorganic salt composition including 70 mass % or more of potassium nitrate to perform ion exchange; (2) a step of bringing the glass having been ion-exchanged in step (1) into contact with an inorganic salt composition including 50 mass % or more of sodium nitrate to perform ion exchange; and (3) a step of bringing the glass having been ion-exchanged in step (2) into contact with an inorganic salt composition including 70 mass % or more of potassium nitrate to perform ion exchange.

公开(公告)号：US20230278915A1

公开(公告)日：2023-09-07

申请号：US18178583

申请日：2023-03-06

Applicant: AGC Inc.

Inventor： Yusuke FUJIWARA ,  Akio SHIZUKAI

IPC: C03C21/00 ,  C03C3/087

CPC classification number: C03C21/002 ,  C03C3/087

Abstract: The present invention relates to a chemically strengthened glass, having a slope of a K2O concentration of −1.9%/μm or more at a depth of 1 to 3 μm and −0.001%/μm or less at a depth of 5 to 10 μm, in a K2O concentration profile having an abscissa representing the depth (μm) from a surface of the glass and an ordinate representing the K2O concentration (%) by mole percentage in terms of oxides.

公开(公告)号：US20230365463A1

公开(公告)日：2023-11-16

申请号：US18315592

申请日：2023-05-11

Applicant: AGC Inc.

Inventor： Kaname SEKIYA ,  Yusuke FUJIWARA ,  Akio SHIZUKAI ,  Seikichi TEI ,  Takashi ETO

IPC: C03C21/00 ,  B24B7/24

CPC classification number: C03C21/002 ,  B24B7/241

Abstract: The present invention relates to a method for producing a chemically strengthened glass substrate, the method including the following steps (A) to (C): (A) preparing a chemically strengthened glass substrate A having a main surface and an end surface; (B) obtaining a glass substrate by polishing a surface of the chemically strengthened glass substrate A; and (C) performing ion exchange by bringing the glass substrate into contact with an inorganic salt composition including 90% by mass or more of KNO3 and 1.0% by mass or more and 6.0% by mass or less of NaNO3 to obtain a chemically strengthened glass substrate C.