公开(公告)号：US20250109056A1

公开(公告)日：2025-04-03

申请号：US18979248

申请日：2024-12-12

Applicant: AGC Inc.

Inventor： Shigeki SAWAMURA ,  Naoki KANNO

IPC: C03C3/068 ,  C03C3/062 ,  C03C3/064 ,  C03C3/066 ,  C03C3/19 ,  C03C3/21 ,  G02B27/01

Abstract: A circular glass substrate including first and second main surfaces opposite each other, an edge portion between the first and second main surfaces, and a notch at a part of the edge portion. The glass substrate has a specific gravity of 3.00 or more; a radius r of 75 mm or more; a refractive index nd of 1.800 or more; and a ratio (Tf/Tg) of a fictive temperature Tf (° C.) to a glass transition temperature Tg (° C.) of 1.00 or more. In a relationship of an internal transmittance to a wavelength, when converted for a thickness of 10 mm, a shortest wavelength λ70 at which the internal transmittance becomes 70% is 440 nm or less; and a ratio (g/r) of deviation g (mm), of a center of mass (G) relative to a center (P), to the radius r, in a top view, is in a range of 0.05% to 1.2%.

公开(公告)号：US20230348315A1

公开(公告)日：2023-11-02

申请号：US18331230

申请日：2023-06-08

Applicant: AGC Inc.

Inventor： Takato KAJIHARA ,  Shigeki SAWAMURA ,  Rikiya KADO ,  Yutaka KUROIWA ,  Shusaku AKIBA

IPC: C03C3/089 ,  C03C3/097 ,  C03C3/087 ,  C03C3/091 ,  C03C3/093 ,  B32B17/10

CPC classification number: C03C3/097 ,  B32B17/10036 ,  B32B17/1055 ,  C03C3/087 ,  C03C3/089 ,  C03C3/091 ,  C03C3/093 ,  B32B2307/204 ,  B32B2307/412 ,  B32B2307/54 ,  B32B2307/72 ,  B32B2307/734 ,  B32B2307/7376 ,  B32B2605/00

Abstract: A glass plate includes, in terms of molar percentage based on oxides: 50% ≤ SiO2 ≤ 80%; 5.0% ≤ Al2O3 ≤ 10%; 5.0% 0.0%; and 0.30

公开(公告)号：US20250115512A1

公开(公告)日：2025-04-10

申请号：US18985493

申请日：2024-12-18

Applicant: AGC Inc.

Inventor： Takato KAJIHARA ,  Shigeki SAWAMURA

IPC: C03C3/091 ,  B32B17/10

Abstract: The present invention relates to an alkali borosilicate glass, in which a content of total iron in terms of Fe2O3 is 0.03% or more in mol % in terms of oxides, a ratio of three-coordinated boron to a total amount of the three-coordinated boron and four-coordinated boron is 61% or less, the alkali borosilicate glass is substantially free of Se and CoO, when a thickness of the alkali borosilicate glass is converted into 2.0 mm, a solar transmittance Te specified in ISO-9050:2003 is 90% or less, a dominant wavelength Dw measured using a standard C light source specified in JIS Z 8701:1999 is 520 nm or more and 574 nm or less, and an excitation purity Pe measured using the standard C light source specified in JIS Z 8701:1999 is 4.0% or less.

公开(公告)号：US20230192540A1

公开(公告)日：2023-06-22

申请号：US18108535

申请日：2023-02-10

Applicant: AGC Inc.

Inventor： Hitomi FURUTA ,  Qing LI ,  Shigeki SAWAMURA ,  Shusaku AKIBA ,  Seiji INABA

IPC: C03C21/00 ,  C03B32/02 ,  C03C10/00

CPC classification number: C03C21/002 ,  C03B32/02 ,  C03C10/0027

Abstract: The present invention relates to a chemically strengthened glass having a haze value in terms of a thickness of 0.7 mm of 0.5% or less, having a surface compressive stress value of 400 MPa or more, having a depth of a compressive stress layer of 70 μm or more, having an ST limit of 18000 MPa·μm to 30000 MPa·μm, and being a glass ceramic including at least one of a Li3PO4 crystal and a Li4SiO4 crystal, or including a solid solution crystal of Li3PO4 or Li4SiO4 or a solid solution of both Li3PO4 and Li4SiO4.

公开(公告)号：US20230192531A1

公开(公告)日：2023-06-22

申请号：US18110357

申请日：2023-02-15

Applicant: AGC Inc.

Inventor： Hitomi FURUTA ,  Qing LI ,  Shigeki SAWAMURA ,  Shusaku AKIBA

IPC: C03C3/097 ,  C03C21/00

CPC classification number: C03C3/097 ,  C03C21/002

Abstract: The present invention relates to a chemically strengthened glass having a sheet shape, in which a haze in terms of a thickness of 0.70 mm is 1.0% or less, and on at least one main surface of the glass, a ratio (Rku/Hv)×1000 of kurtosis Rku of surface unevenness to Vickers hardness Hv is 1 or more and 4.4 or less.

公开(公告)号：US20220002183A1

公开(公告)日：2022-01-06

申请号：US17480440

申请日：2021-09-21

Applicant: AGC INC.

Inventor： Yu HANAWA ,  Kazutaka ONO ,  Shigeki SAWAMURA

IPC: C03C3/087 ,  B32B7/06 ,  H01L21/683 ,  B32B17/06 ,  H01L21/78

Abstract: A glass substrate contains, as a glass matrix composition as represented by mole percentage based on oxides, SiO2: 58-75%, Al2O3: 4.5-16%, B2O3: 0-6%, MgO: 0-6%, CaO: 0-6%, SrO: 5-20%, BaO: 5-20%, and MgO+CaO+SrO+BaO:15-40%. The glass substrate has an alkali metal oxide content of 0-0.1% as represented by mole percentage based on oxides. The glass substrate has an average coefficient of thermal expansion α of 56-90 (×10−7/° C.) at 50° C.-350° C.

公开(公告)号：US20190210327A1

公开(公告)日：2019-07-11

申请号：US16355613

申请日：2019-03-15

Applicant: AGC INC.

Inventor： Shigeki SAWAMURA ,  Kazutaka ONO

IPC: B32B17/10 ,  C03C3/087 ,  C03C3/091

CPC classification number: B32B17/10036 ,  B32B17/06 ,  B32B17/101 ,  C03C3/085 ,  C03C3/087 ,  C03C3/091 ,  C03C17/06 ,  H01L23/15

Abstract: A first aspect of the present invention relates to a glass substrate having a content of alkali metal oxides, as represented by molar percentage based on oxides, of 0 to 0.1%, a devitrification-temperature viscosity of 103.2 dPa·s or higher, and an average coefficient of thermal expansion α at 30 to 220° C. of 7.80 to 9.00 (ppm/° C.). A second aspect of the present invention relates to a glass substrate which is to be used for a support substrate for semiconductor packages, the glass substrate having a content of alkali metal oxides, as represented by molar percentage based on oxides, of 0 to 0.1% and a photoelastic constant of 10 to 26 nm/cm/MPa.

公开(公告)号：US20240293999A1

公开(公告)日：2024-09-05

申请号：US18646873

申请日：2024-04-26

Applicant: AGC Inc.

Inventor： Takato KAJIHARA ,  Shigeki SAWAMURA

IPC: B32B17/10 ,  B32B1/00

CPC classification number: B32B17/10036 ,  B32B1/00 ,  B32B17/10119 ,  B32B17/10449 ,  B32B17/10889 ,  B32B2250/03 ,  B32B2250/40 ,  B32B2309/105 ,  B32B2315/08 ,  B32B2605/08

Abstract: A borosilicate glass includes: in mol % in terms of oxide, 70.0%≤SiO2≤85.0%; 5.0%≤B2O3 ≤20.0%; 0.70%≤Al2O3≤10.0%; 0.0%≤Li2O≤5.0%; 0.0%≤Na2O≤10.0%; 0.0%≤K2O≤5.0%; 0.0%≤MgO≤5.0%; 0.0%≤CaO≤5.0%; 0.0%≤SrO≤5.0%; and 0.10%≤Fe2O3≤1.0%, in which the borosilicate glass has a total amount of SiO2, Al2O3, and B2O3 of 85.0% or more, the borosilicate glass is substantially free of BaO, PbO, and As2O3, and Tb−Ta>0 is satisfied.

公开(公告)号：US20240270626A1

公开(公告)日：2024-08-15

申请号：US18644271

申请日：2024-04-24

Applicant: AGC Inc.

Inventor： Qing LI ,  Yusuke ARAI ,  Akio KOIKE ,  Kazutaka ONO ,  Hitomi FURUTA ,  Shigeki SAWAMURA

IPC: C03C10/00 ,  C03C4/18 ,  C03C21/00 ,  H01L23/15

CPC classification number: C03C10/0027 ,  C03C4/18 ,  C03C21/002 ,  H01L23/15 ,  C03C2204/00

Abstract: A glass sheet, containing, in mass % on an oxide basis: 45-70% of SiO2, 1-15% of Al2O3, 10-25% of Li2O, 0-10% of Na2O, 0-5% of K2O, and 0-15% of ZrO2. K2O/R2O is 0.10 or less and ZrO2/R2O is 0.30 or more, where R2O is a total content of Li2O, Na2O, and K2O. The glass sheet has an average thermal expansion coefficient at 50° C.-350° C. of 90×10−7/° C.-140×10−7/° C. and a Young's modulus of 85 GPa or more.

公开(公告)号：US20230365456A1

公开(公告)日：2023-11-16

申请号：US18355545

申请日：2023-07-20

Applicant: AGC INC.

Inventor： Shigeki SAWAMURA ,  Qing LI ,  Hitomi FURUTA ,  Shusaku AKIBA

IPC: C03C10/00

CPC classification number: C03C10/0009 ,  C03C10/0054

Abstract: The present invention is a glass ceramic including a crystal and a residual glass, in which the residual glass has a Young's modulus parameter ER of 75 or more, the Young's modulus parameter ER being calculated based on the following formula: ER=62.2×[SiO2]+134.9×[Al2O3]+121.7×[B2O3]+33.0×[P2O5]+72.6×[MgO]+121.5×[CaO]+43.7×[SrO]+38.6×[BaO]+84.0×[Li2O]+26.2×[Na2O]+17.8×[K2O]+156.8×[ZrO2]+154.3×[TiO2]+74.7×[La2O3]+80.3×[Y2O3]+54.3×[ZnO].