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公开(公告)号：US11623889B2
公开(公告)日：2023-04-11
申请号：US17556137
申请日：2021-12-20
Applicant: AGC Inc.
Inventor： Yusuke Fujiwara , Izuru Kashima , Michinori Suehara
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.
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公开(公告)号：US10308549B2
公开(公告)日：2019-06-04
申请号：US15000719
申请日：2016-01-19
Applicant: AGC Inc.
Inventor： Izuru Kashima , Yusuke Fujiwara , Kiyoshi Tamai , Yuichi Suzuki , Daisuke Kobayashi , Yoichi Sera , Taku Yamada , Noriko Tanabe
Abstract: A chemically strengthened glass having a compressive stress layer formed in a surface layer thereof according to an ion exchange method, in which a surface of the glass has polishing flaws, the glass has a texture direction index (Stdi) of 0.30 or more, a hydrogen concentration Y in a region to a depth X from an outermost surface of the glass satisfies the following relational equation (I) at X=from 0.1 to 0.4 (μm), and a surface strength F (N) measured by a ball-on-ring test is (F≥1400×t2) relative to a sheet thickness t (mm) of the glass: Y=aX+b (I) in which meanings of respective symbols in the equation (I) are as follows: Y: hydrogen concentration (as H2O, mol/L), X: depth from the outermost surface of the glass (μm), a: −0.300 or more, and b: 0.220 or less.
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公开(公告)号：US12065376B2
公开(公告)日：2024-08-20
申请号：US17652543
申请日：2022-02-25
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×(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：US11548815B2
公开(公告)日：2023-01-10
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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公开(公告)号：US11236016B2
公开(公告)日：2022-02-01
申请号：US16660982
申请日：2019-10-23
Applicant: AGC INC.
Inventor： Yusuke Fujiwara , Izuru Kashima , Michinori Suehara
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.
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Patent Agency Ranking
公开(公告)号：US10730793B2
公开(公告)日：2020-08-04
申请号：US15651316
申请日：2017-07-17
Applicant: AGC Inc.
Inventor： Izuru Kashima , Yusuke Fujiwara , Naoki Uemura , Kiyoshi Tamai
Abstract: An object of the present invention is to provide a chemically strengthened glass having enhanced surface strength and bending strength. 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 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 (I) in X=0.1 to 0.4 (μm), and an edge surface connecting main surfaces on a front side and a back side of the glass has a skewness (Rsk) measured based on JIS B0601 (2001) being −1.3 or more.
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公开(公告)号：US10450226B2
公开(公告)日：2019-10-22
申请号：US15818016
申请日：2017-11-20
Applicant: AGC Inc.
Inventor： Izuru Kashima , Yusuke Fujiwara , Kiyoshi Tamai , Yuichi Suzuki , Daisuke Kobayashi , Yoichi Sera , Taku Yamada
Abstract: A chemically strengthened glass having a compressive stress layer formed in a surface layer thereof according to an ion exchange method, in which the glass has a surface roughness (Ra) of 0.20 nm or higher, a hydrogen concentration Y in a region to a depth X from an outermost surface of the glass satisfies the following relational equation (I) at X=from 0.1 to 0.4 (μm), a surface strength F (N) measured by a ball-on-ring test under the following conditions is (F≥1500×t2) relative to a sheet thickness t (mm) of the glass, and a surface of the glass has no polishing flaw: Y=aX+b (I) in which meanings of respective symbols in the equation (I) are as follows: Y: hydrogen concentration (as H2O, mol/L); X: depth from the outermost surface of the glass (μm); a: −0.270 to −0.005; and b: 0.020 to 0.220.
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公开(公告)号：US11661374B2
公开(公告)日：2023-05-30
申请号：US17205703
申请日：2021-03-18
Applicant: AGC Inc.
Inventor： Michinori Suehara , Yusuke Fujiwara , Lilin Zhou
CPC classification number: C03C21/002 , G01N3/24 , G01N3/56 , G01N33/386 , G02B1/14 , G02B1/18 , H05K5/0017 , H05K5/03
Abstract: The purpose of the present invention is to provide a chemically-strengthened glass exhibiting both surface strength and abrasion-resistant anti-fingerprint (AFP) properties. The present invention relates to a plate-shaped chemically-strengthened glass which has a compressive stress layer provided to a glass surface layer, a glass surface hydrogen concentration profile in a specific range, and a surface strength and abrasion-resistant anti-fingerprint (AFP) properties which are in specific ranges.
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公开(公告)号：US11427503B2
公开(公告)日：2022-08-30
申请号：US16720521
申请日：2019-12-19
Applicant: AGC Inc.
Inventor： Michinori Suehara , Yusuke Fujiwara , Lilin Zhou
Abstract: The purpose of the present invention is to provide a chemically-strengthened glass exhibiting both surface strength and abrasion-resistant anti-fingerprint (AFP) properties. The present invention relates to a plate-shaped chemically-strengthened glass which has a compressive stress layer provided to a glass surface layer, a glass surface hydrogen concentration profile in a specific range, and a surface strength and abrasion-resistant anti-fingerprint (AFP) properties which are in specific ranges.
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公开(公告)号：US12269769B2
公开(公告)日：2025-04-08
申请号：US18737352
申请日：2024-06-07
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 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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