公开(公告)号：US12281039B2

公开(公告)日：2025-04-22

申请号：US18316524

申请日：2023-05-12

Applicant: AGC Inc.

Inventor： Kenji Imakita ,  Suguru Murayama ,  Izuru Kashima ,  Kazuki Kanehara

IPC: C03C21/00 ,  C03C3/083 ,  C03C3/085 ,  C03C3/091 ,  C03C3/093 ,  C03C3/097

Abstract: The present invention relates to a chemically strengthened glass satisfying A1 [MPa] of 600 or more, A2 [MPa] of 50 or more, B1 [μm] of 6 or less, B2 [μm] of 10% or more of t [μm], C [MPa] of −30 or less, and A1/B1 [MPa/μm] of 100 or more when the chemically strengthened glass has a thickness t [μm] and a profile of a stress value [MPa] at a depth×[μm] from a glass surface is approximated by an error least-squares method in a region of 0 A2 and B1

公开(公告)号：US12234181B2

公开(公告)日：2025-02-25

申请号：US17093121

申请日：2020-11-09

Applicant: AGC Inc.

Inventor： Yusuke Kobayashi ,  Izuru Kashima ,  Kazutaka Ono ,  Seiji Inaba ,  Hirofumi Yamamoto ,  Kiyoshi Tamai

IPC: C03C3/087 ,  B32B17/10 ,  C03C4/18 ,  C03C21/00

Abstract: A supporting glass substrate includes a compression stress layer on a surface thereof, and has an average thermal expansion coefficient at 50° C. to 200° C. that is 7 ppm/° C. to 15 ppm/° C., an internal tensile stress that is 5 MPa to 55 MPa, and a depth of the compression stress layer that is 10 μm to 60 μm.

公开(公告)号：US11198642B2

公开(公告)日：2021-12-14

申请号：US16251963

申请日：2019-01-18

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：US10927039B2

公开(公告)日：2021-02-23

申请号：US15651353

申请日：2017-07-17

Applicant: AGC Inc.

Inventor： Izuru Kashima ,  Yusuke Fujiwara ,  Kiyoshi Tamai ,  Yuichi Suzuki ,  Yoichi Sera ,  Daisuke Kobayashi

IPC: C03C21/00 ,  C03C15/00 ,  C03C19/00 ,  C03C23/00 ,  C03C3/091 ,  G02F1/1333

Abstract: An object of the present invention is to provide a chemically strengthened glass that can effectively suppress strength of a glass from being deteriorated even though performing chemical strengthening and has high transmittance (that is, low reflectivity). The present invention relates to a chemically strengthened glass having a compressive stress layer formed on a surface layer thereof by an ion exchange method, in which the glass contains sodium and boron, and has a delta transmittance being +0.1% or more, and in which a straight line obtained by a linear approximation of a hydrogen concentration Y in a region of a depth X from an outermost surface of the glass satisfies a specific relational equation in X=0.1 to 0.4 (μm).