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：US11274981B2

公开(公告)日：2022-03-15

申请号：US16363010

申请日：2019-03-25

Applicant: ORIHARA INDUSTRIAL CO., LTD. ,  AGC Inc.

Inventor： Shuji Orihara ,  Yoshio Orihara ,  Satoshi Ogami ,  Seiji Inaba

IPC: G01L1/24 ,  C03C21/00 ,  G01L1/00 ,  G01N21/21

Abstract: A stress measurement device for strengthened glass includes a polarization phase difference variable member configured to vary a polarization phase difference of a laser light by one wavelength of the laser light or more; an imaging element configured to image a plurality of times at a predetermined time interval a scattered light emitted according to the laser light with the varied polarization phase difference entering the strengthened glass, and obtain a plurality of images; and an arithmetic unit configured to measure a periodic change in luminance of the scattered light using the plurality of images, calculate a change in a phase of the change in luminance, and calculate a stress distribution in a depth direction from a surface of the strengthened glass based on the change in the phase.

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：US11028005B2

公开(公告)日：2021-06-08

申请号：US17006271

申请日：2020-08-28

Applicant: AGC Inc.

Inventor： Seiji Inaba ,  Kazutaka Ono

IPC: C03C3/068 ,  H01L21/683

Abstract: To provide a glass plate having a high Young's modulus and a high devitrification viscosity. A glass includes, in mol % based on oxides: SiO2 of 30.0 to 50.0%; B2O3 of 10.0 to 30.0%; Al2O3 of 10.0 to 30.0%; Y2O3 of 3.0 to 17.0%; and Gd2O3 of 3.5 to 17.0%, in which (Gd2O3+Y2O3) is from 16.0 to 22.0%, and (Gd2O3/Y2O3) is from 0.15 to 7.0.