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公开(公告)号：US20240140855A1
公开(公告)日：2024-05-02
申请号：US18403771
申请日：2024-01-04
Applicant: AGC Inc.
Inventor： Hirofumi TOKUNAGA , Kazutaka ONO
CPC classification number: C03C3/087 , C03C3/091 , C03C2201/10 , C03C2203/10
Abstract: An alkali free glass having an average coefficient of thermal expansion at 50 to 350° C. of 30×10−7 to 43×10−7/° C., a strain point of 650 to 725° C., a temperature T4 at which a viscosity reaches 104 dPa·s of 1,290° C. or lower, and a temperature T2 at which the viscosity reaches 102 dPa·s of 1,680° C. or lower, and including, as represented by mol % based on oxides: 62 to 67% of SiO2, 8 to 13% of MgO, 6 to 12% of CaO, 0.5 to 4% of SrO, and 0 to 0.5% of BaO, wherein MgO+CaO+SrO+BaO is 18 to 22%, and MgO/CaO is 0.8 or more, and the alkali free glass has a value expressed by the following Expression (I) of 4.6 or less:
(7.87[A2O3]-8.5[B2O3]+11.35[MgO]+7.09[CaO]+5.52[SrO]−1.45[BaO])/[SiO2] Expression (I).-
公开(公告)号：US20240300846A1
公开(公告)日：2024-09-12
申请号：US18663496
申请日：2024-05-14
Applicant: AGC Inc.
Inventor： Hirofumi TOKUNAGA , Kazutaka ONO , Motoyuki HIROSE
CPC classification number: C03C3/087 , C03B17/064 , C03C3/091 , C03C4/0085 , C03C2203/10
Abstract: An alkali-free glass having a strain point of 650° C. or more, an average coefficient of thermal expansion at 50 to 350° C. of from 30×10−7 to 45×10−7/° C., and a temperature T2 at which a glass viscosity reaches 102 dPa·s of from 1,500 to 1,800° C. The alkali-free glass contains, as represented by mol % based on oxides, SiO2: from 62 to 70%, Al2O3: from 9 to 16% B2O3: from 0 to 12%, MgO: from 3 to 10%, CaO: from 4 to 12%, SrO: from 0 to 6%, and Fe2O3: from 0.001 to 0.04%, provided that MgO+CaO+SrO+BaO is from 12 to 25%. The alkali-free glass has a β-OH value of from 0.35 to 0.85/mm.
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公开(公告)号：US20230223493A1
公开(公告)日：2023-07-13
申请号：US18182688
申请日：2023-03-13
Applicant: AGC Inc.
Inventor： Hirofumi TOKUNAGA , Kazutaka ONO , Takefumi ABE , Naoya WADA
IPC: H01L33/20 , H01L25/075
CPC classification number: H01L33/20 , H01L25/0753
Abstract: The present invention relates to an LED element substrate on which an LED element is to be provided and which includes a glass, in which at least one main surface of the substrate is black, and one or more LED elements are to be provided on the black main surface, and relates to an LED element substrate on which an LED element is to be provided and which includes a glass, in which at least one main surface of the substrate is black, the substrate comprises a plurality of holes, and one or more LED elements are to be provided on an inside of each of the holes.
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公开(公告)号：US20220340477A1
公开(公告)日：2022-10-27
申请号：US17860443
申请日：2022-07-08
Applicant: AGC Inc.
Inventor： Hirofumi TOKUNAGA , Kazutaka ONO
Abstract: An alkali free glass has an average coefficient of thermal expansion at 50 to 350° C. of 30×10−7 to 43×10−7/° C., a Young's modulus of 88 GPa or more, a strain point of 650 to 725° C., a temperature T4 at which a viscosity reaches 104 dPa·s of 1,290° C. or lower, a glass surface devitrification temperature (Tc) of T4+20° C. or lower, and a temperature T2 at which the viscosity reaches 102 dPa·s of 1,680° C. or lower. The alkali free glass contains, as represented by mol % based on oxides, 62 to 67% of SiO2, 12.5 to 16.5% of Al2O3, 0 to 3% of B2O3, 8 to 13% of MgO, 6 to 12% of CaO, 0.5 to 4% of SrO, and 0 to 0.5% of BaO. MgO+CaO+SrO+BaO is 18 to 22%, and MgO/CaO is 0.8 to 1.33.
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公开(公告)号：US20240383803A1
公开(公告)日：2024-11-21
申请号：US18757697
申请日：2024-06-28
Applicant: AGC Inc.
Inventor： Hirofumi TOKUNAGA , Daisuke KOBAYASHI , Kazutaka ONO , Atsuyoshi TAKENAKA , Yoshitaka MAEYANAGI
Abstract: The present invention relates to a glass substrate including a pair of main surfaces and an end surface, and having a surface layer diffusion Sn atom concentration of 2.0×1018 atomic/cm3 or more and 1.4×1019 atomic/cm3 or less in at least one of the main surfaces, the surface layer diffusion Sn atom concentration being obtained by subtracting an Sn atom concentration of an inside of the glass substrate from an Sn atom concentration of a surface layer of the glass substrate, in which the Sn atom concentration of a surface layer of the glass substrate is defined as an Sn atom concentration at a depth of 0.1 to 0.3 μm from the main surface and the Sn atom concentration of an inside of the glass substrate is defined as an Sn atom concentration at a depth of 9.0 to 9.2 μm from the main surface.
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Patent Agency Ranking
公开(公告)号：US20210363051A1
公开(公告)日：2021-11-25
申请号：US17396217
申请日：2021-08-06
Applicant: AGC Inc.
Inventor： Hirofumi TOKUNAGA , Kazutaka ONO
Abstract: An alkali-free glass includes, in mol % in terms of oxides: SiO2: 63-69%; Al2O3: 8-13%; B2O3: 0.5-4%; MgO: 8-15%; CaO: 4-12%; SrO: 0-4.5%; and BaO: 0-1%. [MgO]/[CaO] is 0.67 to 3.75. A value of Formula (A) is 84 or larger. A value of Formula (B) is 715 or smaller. A value of Formula (C) is 200 or smaller. A value of Formula (D) is 15 or smaller.
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公开(公告)号：US20190248697A1
公开(公告)日：2019-08-15
申请号：US16392714
申请日：2019-04-24
Applicant: AGC Inc.
Inventor： Hirofumi TOKUNAGA , Kazutaka Ono , Motoyuki Hirose
Abstract: The present invention relates to an alkali-free glass and a method for producing the same. More specifically, the present invention relates to an alkali-free glass suitable as a glass for substrates of various displays such as liquid crystal display, and a method for producing the same. According to the present invention, an alkali-free glass suitable as a glass for display substrates, in which inclusion of bubbles is greatly reduced by virtue of containing a refining agent and suppressing the stirring reboil, is obtained.
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公开(公告)号：US20240417310A1
公开(公告)日：2024-12-19
申请号：US18814160
申请日：2024-08-23
Applicant: AGC Inc.
Inventor： Yuya HAMADA , Hirofumi TOKUNAGA
Abstract: An alkali-free glass, includes, as represented by mol % based on oxides: 50% to 76% of SiO2; 2% to 6% of Al2O3; 18% to 35% of B2O3; 1% to 3.5% of MgO; 0.5% to 4% of CaO; 1% to 4.5% of SrO; and 0% to 3% of BaO, in which an expression (A) is [MgO]+[CaO]+[SrO]+[BaO], and a value of the expression (A) is 3.5 to 6, an expression (B) is [Al2O3]—([MgO]+[CaO]+[SrO]+[BaO]), and a value of the expression (B) is −2 to 2, an expression (J) is ([MgO]+[CaO])/([MgO]+[CaO]+[SrO]+[BaO]), and a value of the expression (J) is 0.2 to 0.7, and Δβ-OH is 0 mm−1 to 0.1 mm−1.
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公开(公告)号：US20240199469A1
公开(公告)日：2024-06-20
申请号：US18594084
申请日：2024-03-04
Applicant: AGC Inc.
Inventor： Yuya HAMADA , Hirofumi TOKUNAGA
Abstract: The present invention relates to an alkali-free glass having a strain point of 700° C. or higher and 740° C. or lower, a density of 2.6 g/cm3 or lower, a Young's modulus of 90 GPa or higher and 100 GPa or lower, an average coefficient of thermal expansion at 50° C. to 350° C. of 30×10−7/K or higher and 39×10−7/K or lower, a temperature T2 at which a glass viscosity reaches 102 dPa·s of 1590° C. or higher and 1690° C. or lower, a temperature T4 at which the glass viscosity reaches 104 dPa·s of 1350° C. or lower, a glass surface devitrification temperature (Tc) of lower than (T4+80)° C., and a specific elastic modulus of 36 MN·m/kg or higher, and including a prescribed glass composition.
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公开(公告)号：US20210380466A1
公开(公告)日：2021-12-09
申请号：US17396277
申请日：2021-08-06
Applicant: AGC Inc.
Inventor： Hirofumi TOKUNAGA , Kazutaka ONO
IPC: C03C3/091
Abstract: An alkali-free glass includes, in mol % in terms of oxides: SiO2: 63-75%; Al2O3: 10-16%; B2O3: 0-5%; MgO: 0.1-15%; CaO: 0.1-12%; SrO: 0-8%; and BaO: 0-6%. [MgO]/[CaO] is 1.5 or smaller. A value of Formula (A) is 82.5 or larger. A value of Formula (B) is 690 or larger and 800 or smaller. A value of Formula (C) is 100 or smaller. A value of Formula (D) is 20 or smaller. The alkali-free glass has a Young's modulus of 83 GPa or larger and a surface devitrification viscosity ηc of 104.2 dPa·s or higher.
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