公开(公告)号：US11021389B2

公开(公告)日：2021-06-01

申请号：US16941631

申请日：2020-07-29

Applicant: AGC Inc.

Inventor： Seiji Inaba ,  Yasunari Saito ,  Kiyoshi Tamai ,  Kazutaka Ono ,  Yuha Kobayashi

IPC: B32B17/00 ,  C03C3/087 ,  C03C3/085 ,  H01L23/15 ,  C03C3/095 ,  C03C3/091 ,  C03C3/097

Abstract: A supporting glass substrate has a ratio of a Young's modulus (GPa) to a density (g/cm3) that is 37.0 (GPa·cm3/g) or more and the ratio has a value larger than a ratio calculation value, the ratio calculation value being a ratio of a Young's modulus (GPa) calculated from a composition to a density (g/cm3). The ratio calculation value is represented by the following expression: α=2·Σ{(Vi·Gi)/Mi·Xi}, where, in the expression, Vi is a filling parameter of a metal oxide contained in the supporting glass substrate, Gi is a dissociation energy of a metal oxide contained in the supporting glass substrate, Mi is a molecular weight of a metal oxide contained in the supporting glass substrate, and Xi is a molar ratio of a metal oxide contained in the supporting glass substrate.

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

IPC: C03C21/00 ,  C03C15/02 ,  C03C23/00 ,  C03C3/085 ,  C03C3/087 ,  C03C3/091 ,  G01B5/28 ,  C03C15/00

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.

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：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).

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

IPC: C03C21/00 ,  C03C15/00 ,  C03C3/087 ,  C03C23/00

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.

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

IPC: C03C21/00 ,  G01B5/28 ,  C03C23/00 ,  C03C3/085 ,  C03C3/091 ,  C03C3/087 ,  C03C15/00

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.

公开(公告)号：US11286201B2

公开(公告)日：2022-03-29

申请号：US15874357

申请日：2018-01-18

Applicant: AGC Inc.

Inventor： Kazunobu Maeshige ,  Nobutaka Aomine ,  Hiroyuki Okawa ,  Kiyoshi Tamai ,  Hitoshi Onoda ,  Makoto Sano ,  Yusuke Kobayashi

IPC: C03C17/34 ,  B32B17/10 ,  B32B33/00 ,  C03C17/22 ,  C03C17/02 ,  C03C3/087 ,  G03B27/62 ,  C03C21/00 ,  C03C23/00

Abstract: The present invention provides a cover glass and a glass laminate which are reduced in warpage, and have excellent scratch resistance, low reflecting properties and excellent optical properties. According to the present invention, a cover glass and a glass laminate which are reduced in glass warpage, retain the effect of scratch resistance, and have low reflecting properties and excellent optical properties can be provided by alternately superposing a film including a high-refractive-index material and a film including a low-refractive-index material, in given amounts.