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公开(公告)号：US20190337844A1
公开(公告)日：2019-11-07
申请号：US16394040
申请日：2019-04-25
Applicant: AGC INC
Inventor： Yoshiteru IKEDA , lzuru KASHIMA , Hiroki TAKAHASHI , Kaname SEKIYA
IPC: C03C21/00
Abstract: The present invention relates to a method for producing a chemically strengthened glass, the method including the following steps (1) to (3) in this order: (1) a glass sheet preparation step of preparing a glass sheet having, in a surface layer thereof, a compressive stress layer; (2) a first ion exchange step of bringing the glass sheet into contact with an inorganic salt composition to perform ion exchange of at least one pair of ions so as to decrease a compressive stress value of the compressive stress layer; and (3) a second ion exchange step of bringing the glass sheet into contact with an inorganic salt composition to perform ion exchange of at least one pair of ions so as to increase the compressive stress value of the compressive stress layer in the surface layer.
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公开(公告)号：US20230391666A1
公开(公告)日：2023-12-07
申请号：US18454228
申请日：2023-08-23
Applicant: AGC Inc.
Inventor： Kaname SEKIYA , Izuru KASHIMA
CPC classification number: C03C21/002 , C03C3/095 , C03C3/097 , C03C10/0027
Abstract: The present invention relate to a chemically strengthened glass manufacturing method for obtaining a chemically strengthened glass by performing an ion exchange treatment on a glass for chemical strengthening having a CTA value of x (MPa) obtained by Equation (1), the method including: a first ion exchange treatment of bringing a first molten salt composition into contact with the glass for chemical strengthening so that a CTave value, which is obtained by Equation (2), of the glass for chemical strengthening exceeds x (MPa); and a second ion exchange treatment, after the first ion exchange treatment, of bringing the glass for chemical strengthening into contact with a second molten salt composition having a component ratio different from a composition ratio of the first molten salt composition so that the CTave value of the glass for chemical strengthening is less than x (MPa).
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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
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.
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公开(公告)号：US20220281769A1
公开(公告)日：2022-09-08
申请号：US17652543
申请日：2022-02-25
Applicant: AGC INC.
Inventor： Kaname SEKIYA , Yusuke FUJIWARA
Abstract: The present invention relates to a chemically strengthened glass having a thickness t (mm), in which a first-order derivative CSx′ of a stress value CSx (MPa) is −4.7 or larger in a range of CSx≥0 in a profile of the stress value CSx (MPa), in which the stress value CSx (MPa) is a function of depth×(μm) from a glass surface, and in which the stress value CSx (MPa) is measured by a scattered light photoelastic stress meter, and a manufacturing method thereof.
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公开(公告)号：US20220033299A1
公开(公告)日：2022-02-03
申请号：US17388494
申请日：2021-07-29
Applicant: AGC Inc.
Inventor： Kaname SEKIYA , Yusuke FUJIWARA
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
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Patent Agency Ranking
公开(公告)号：US20240368023A1
公开(公告)日：2024-11-07
申请号：US18650183
申请日：2024-04-30
Applicant: AGC Inc.
Inventor： Hiroki TAKAHASHI , Atsuto HASHIMOTO , Kaname SEKIYA , Seiji INABA
Abstract: The present invention relates to a glass for chemical strengthening, including: in terms of mole percentage based on oxides, 50% or more of SiO2; 0% to 10% of B2O3; 1% to 30% of Al2O3; 0% to 10% of P2O5; 0% to 10% of Y2O3; 0% to 25% of Li2O; 0% to 25% of Na2O; 0% to 25% of K2O; 0% to 10% of MgO; 0% to 10% of CaO; 0% to 10% of SrO; 0% to 10% of BaO; 0% to 10% of ZnO; 0% to 5% of ZrO2; 0% to 5% of TiO2; 0% to 5% of SnO2; and 0% to 0.5% of Fe2O3, in which a ratio (R2O/Al2O3) of a total content of Li2O, Na2O, and K2O to a content of Al2O3 satisfies the following Expression: 0.8≤(R2O/Al2O3)≤30.
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公开(公告)号：US20240116806A1
公开(公告)日：2024-04-11
申请号：US18472365
申请日：2023-09-22
Applicant: AGC Inc.
Inventor： Kaname SEKIYA
CPC classification number: C03C21/002 , C03C3/083
Abstract: The present invention relates to a chemically strengthened glass having a K-DOL defined as below of 5 μm or less, and having a value CS50/(K-DOL×t) obtained by dividing a compressive stress CS50 (MPa) at a depth of 50 μm from a surface of the chemically strengthened glass by a product of the K-DOL (μm) and a sheet thickness t (mm) of 45 (MPa/(μm·mm)) or more, K-DOL being a depth value (μm) from a glass surface of a compressive stress layer caused by K ions.
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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
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.
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公开(公告)号：US20240383802A1
公开(公告)日：2024-11-21
申请号：US18663165
申请日：2024-05-14
Applicant: AGC Inc.
Inventor： Kaname SEKIYA , Seiji INABA , Yusuke FUJIWARA , Yusuke KATAOKA
Abstract: The present invention relates to a chemically strengthened glass having a sheet thickness t (mm), a compressive stress layer depth DOC of 180×t (μm) or more, CS30-50 which is a compressive stress integrated value at a depth of 30 μm to 50 μm from a surface of the chemically strengthened glass of 12000 Pa·m or less, and CS90 which is a compressive stress value at a depth of 90 μm from the surface of 175×t−88 (MPa) or more.
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公开(公告)号：US20240327276A1
公开(公告)日：2024-10-03
申请号：US18737352
申请日：2024-06-07
Applicant: AGC INC.
Inventor： Kaname SEKIYA , Yusuke FUJIWARA
CPC classification number: C03C21/002 , C03C3/083 , C03C4/18 , C03C2204/00
Abstract: The present invention relates to a chemically strengthened glass having a thickness t (mm), in which a first-order derivative CSx′ of a stress value CSx (MPa) is −4.7 or larger in a range of CSx≥0 in a profile of the stress value CSx (MPa), in which the stress value CSx (MPa) is a function of depth x (μm) from a glass surface, and in which the stress value CSx (MPa) is measured by a scattered light photoelastic stress meter, and a manufacturing method thereof.
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