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公开(公告)号：US11718557B2
公开(公告)日：2023-08-08
申请号：US17692335
申请日：2022-03-11
Applicant: AGC Inc.
Inventor： Kenji Imakita , Suguru Murayama , Izuru Kashima , Kazuki Kanehara
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 x [μm] from a glass surface is approximated by an error least-squares method in a region of 0 A2 and B1
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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：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
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：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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Patent Agency Ranking
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：US11312656B2
公开(公告)日：2022-04-26
申请号：US16585200
申请日：2019-09-27
Applicant: AGC Inc.
Inventor： Kenji Imakita , Suguru Murayama , Izuru Kashima , Kazuki Kanehara
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 x [μm] from a glass surface is approximated by an error least-squares method in a region of 0 A2 and B1
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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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公开(公告)号：US11028013B2
公开(公告)日：2021-06-08
申请号：US15896639
申请日：2018-02-14
Applicant: AGC Inc.
Inventor： Masao Ozeki , Shusaku Akiba , Izuru Kashima
Abstract: A chemically strengthened glass has a compressive stress layer formed in a glass surface layer by ion exchange. The compressive stress layer includes at least two types of stress patterns of a stress pattern A close to a glass surface and a stress pattern B on an inner side of the glass. In the stress pattern A, compressive stress increases as going inward from the glass surface. In the stress pattern B, compressive stress decreases as going inward from the glass surface. Depth of compressive stress layer in the stress pattern B is 90 μm or more from the glass surface. Compressive stress α MPa of the glass surface in the stress pattern A and compressive stress β MPa at a point where the stress pattern A and the stress pattern B cross each other satisfy a relation of β>α.
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公开(公告)号：US20200055773A1
公开(公告)日：2020-02-20
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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