Patents by Inventor Shigeki Sawamura
Shigeki Sawamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240116800Abstract: A glass plate includes, in terms of molar percentage based on oxides: 70%?SiO2?85%; 0.0%?Al2O3?10%; 0.0%?B2O3?15%; 1.5%?MgO?20%; 0.0%?CaO?20%; 0.0% 0 SrO?5.0%; 0.0%?BaO?1.0%; 0.0% 0 ZnO?5.0%; 1.0%?Li2O?11%; 0.0%?Na2O?10%; 0.0% K2O?10%; 3.0%?R2O 11%; 0.01% Fe2O3?1.00%; and 2.0%?RO?20%, in which a temperature T2 at which a glass viscosity is 102 dPa·s is 1,650° C. or lower, a temperature T12 at which a glass viscosity is 1012 dPa·s is 730° C. or lower, a relative dielectric constant (Fr) at a frequency of 10 GHz is 6.5 or less, and a loss tangent (tan ?) at a frequency of 10 GHz is 0.0090 or less.Type: ApplicationFiled: December 18, 2023Publication date: April 11, 2024Applicant: AGC Inc.Inventors: Takato KAJIHARA, Shigeki SAWAMURA, Yutaka KUROIWA
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Publication number: 20230365456Abstract: 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].Type: ApplicationFiled: July 20, 2023Publication date: November 16, 2023Applicant: AGC INC.Inventors: Shigeki SAWAMURA, Qing LI, Hitomi FURUTA, Shusaku AKIBA
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Publication number: 20230348315Abstract: A glass plate includes, in terms of molar percentage based on oxides: 50% ? SiO2 ? 80%; 5.0% ? Al2O3 ? 10%; 5.0% < B2O3 ? 15%; 0.0% ? P2O5 ? 10%; 0.0% ? MgO ? 10%; 0.0% ? CaO ? 10%; 0.0% ? SrO ? 10%; 0.0% ? BaO ? 10%; 0.0% ? ZnO ? 5.0%; 0.0% ? Li2O ? 5.0%; 0.0% ? Na2O ? 5.0%; 0.0% ? K2O ? 5.0%; 0.0% ? R2O ? 5.0%; Fe2O3 ? 0.04%; 15% ? RO ? 30%; B2O3 - Al2O3 > 0.0%; and 0.30 < Al2O3/RO < 0.50, in which the glass plate has a temperature T12 at which a glass viscosity is 1012 dPa·s of 730° C. or lower, and the glass plate has an average thermal expansion coefficient at 50° C. to 350° C. of 40 × 10-7/K or more.Type: ApplicationFiled: June 8, 2023Publication date: November 2, 2023Applicant: AGC Inc.Inventors: Takato KAJIHARA, Shigeki SAWAMURA, Rikiya KADO, Yutaka KUROIWA, Shusaku AKIBA
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Publication number: 20230331622Abstract: A borosilicate glass includes, in terms of molar percentage based on oxides: 70.0%?SiO2?85.0%; 5.0%?B2O3?20.0%; 0.0%?Al2O3?3.0%; 0.0%?Li2O?5.0%; 0.0%?Na2O?5.0%; 0.0%?K2O?5.0%; 0.0%?MgO?5.0%; 0.0%?CaO?5.0%; 0.0%?SrO?5.0%; 0.0%?BaO?5.0%; and 0.06%?Fe2O3?1.0%, in which the borosilicate glass has a basicity of 0.485 or more, and [AlO3]/([SiO2]+[B2O3]) of 0.015 or less.Type: ApplicationFiled: June 8, 2023Publication date: October 19, 2023Applicant: AGC Inc.Inventors: Rikiya KADO, Takato KAJIHARA, Shigeki SAWAMURA, Shusaku AKIBA, Yutaka KUROIWA
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Patent number: 11753330Abstract: 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 ? of 56-90 (×10?7/° C.) at 50° C.-350° C.Type: GrantFiled: September 21, 2021Date of Patent: September 12, 2023Assignee: AGC INC.Inventors: Yu Hanawa, Kazutaka Ono, Shigeki Sawamura
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Patent number: 11715673Abstract: The present invention provides a glass substrate in which in a step of sticking a glass substrate and a silicon-containing substrate to each other, bubbles hardly intrude therebetween. The present invention relates to a glass substrate for forming a laminated substrate by lamination with a silicon-containing substrate, having a warpage of 2 ?m to 300 ?m, and an inclination angle due to the warpage of 0.0004° to 0.12°.Type: GrantFiled: July 6, 2021Date of Patent: August 1, 2023Assignee: AGC Inc.Inventors: Yu Hanawa, Shigeki Sawamura, Shuhei Nomura, Kazutaka Ono, Nobuhiko Takeshita, Keisuke Hanashima
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Publication number: 20230192540Abstract: 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 ?m or more, having an ST limit of 18000 MPa·?m to 30000 MPa·?m, 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.Type: ApplicationFiled: February 10, 2023Publication date: June 22, 2023Applicant: AGC Inc.Inventors: Hitomi FURUTA, Qing LI, Shigeki SAWAMURA, Shusaku AKIBA, Seiji INABA
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Publication number: 20230192531Abstract: 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.Type: ApplicationFiled: February 15, 2023Publication date: June 22, 2023Applicant: AGC Inc.Inventors: Hitomi FURUTA, Qing LI, Shigeki SAWAMURA, Shusaku AKIBA
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Publication number: 20230192534Abstract: The present invention relates to a glass ceramic having a lithium aluminosilicate composition and including a crystal and a residual glass, in which the residual glass has a composition including, in terms of mol % based on oxides: 25% to 70% of SiO2; 3% to 35% of Al2O3; 0.1% to 20% of Li2O; 0.1% to 20% of Na2O; 0% to 10% of K2O; and 1% to 15% of ZrO2, and a parameter V is ?600 or more and 720 or less, the parameter V being calculated based on the following formula: V=49.589×[SiO2]+61.806×[Al2O3]+45.456×[P2O5]+41.151×[MgO]+110.26×[CaO]+50.263×[SrO]+55.693×[Li2O]+3.598×[Na2O]+9.503×[K2O]+6.83×[TiO2]?2.885×[ZrO2]?3746.99.Type: ApplicationFiled: February 14, 2023Publication date: June 22, 2023Applicant: AGC Inc.Inventors: Shigeki SAWAMURA, Eriko MAEDA, Shusaku AKIBA, Satoshi OGAMI
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Publication number: 20230120488Abstract: The present invention pertains to a laminated glass for a vehicle, the laminated glass including a first glass sheet, a second glass sheet and an intermediate film sandwiched between the first glass sheet and the second glass sheet, in which: the total thickness of the first glass sheet, the second glass sheet and the intermediate film is 4.0 mm or more; the first glass sheet is formed of a borosilicate glass containing, in terms of oxide by molar percentage, 1.0% or more of B2O3; and when a radio wave (TM wave) with a frequency of 79 [GHz] is made incident at an incident angle of 60° to the first glass sheet, the transmission property S21 is -4.0 [dB] or more.Type: ApplicationFiled: October 28, 2022Publication date: April 20, 2023Applicant: AGC Inc.Inventors: Takato KAJIHARA, Shigeki SAWAMURA, Shusaku AKIBA, Yutaka KUROIWA
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Publication number: 20220002183Abstract: 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 ? of 56-90 (×10?7/° C.) at 50° C.-350° C.Type: ApplicationFiled: September 21, 2021Publication date: January 6, 2022Applicant: AGC INC.Inventors: Yu HANAWA, Kazutaka ONO, Shigeki SAWAMURA
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Patent number: 11180407Abstract: 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 ? of 56-90 (×10?7/° C.) at 50° C.-350° C.Type: GrantFiled: March 29, 2018Date of Patent: November 23, 2021Assignee: AGC Inc.Inventors: Yu Hanawa, Kazutaka Ono, Shigeki Sawamura
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Publication number: 20210347682Abstract: The present invention relates to a glass ceramic having a visible-light transmittance of 85% or more in terms of a thickness of 0.7 mm, and a haze value of 1.0% or less in terms of a thickness of 0.7 mm, and including, in mass % on an oxide basis: 45-70% of SiO2; 1-15% of Al2O3; and 10-25% of Li2O.Type: ApplicationFiled: July 22, 2021Publication date: November 11, 2021Applicant: AGC Inc.Inventors: Qing LI, Yusuke ARAI, Akio KOIKE, Kazutaka ONO, Hitomi FURUTA, Shigeki SAWAMURA
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Publication number: 20210343610Abstract: The present invention provides a glass substrate in which in a step of sticking a glass substrate and a silicon-containing substrate to each other, bubbles hardly intrude therebetween. The present invention relates to a glass substrate for forming a laminated substrate by lamination with a silicon-containing substrate, having a warpage of 2 ?m to 300 ?m, and an inclination angle due to the warpage of 0.0004° to 0.12°.Type: ApplicationFiled: July 6, 2021Publication date: November 4, 2021Applicant: AGC Inc.Inventors: Yu HANAWA, Shigeki SAWAMURA, Shuhei NOMURA, Kazutaka ONO, Nobuhiko TAKESHITA, Keisuke HANASHIMA
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Patent number: 11114356Abstract: The present invention provides a glass substrate in which in a step of sticking a glass substrate and a silicon-containing substrate to each other, bubbles hardly intrude therebetween. The present invention relates to a glass substrate for forming a laminated substrate by lamination with a silicon-containing substrate, having a warpage of 2 ?m to 300 ?m, and an inclination angle due to the warpage of 0.0004° to 0.12°.Type: GrantFiled: August 29, 2019Date of Patent: September 7, 2021Assignee: AGC Inc.Inventors: Yu Hanawa, Shigeki Sawamura, Shuhei Nomura, Kazutaka Ono, Nobuhiko Takeshita, Keisuke Hanashima
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Patent number: 10994517Abstract: 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 ? 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.Type: GrantFiled: March 15, 2019Date of Patent: May 4, 2021Assignee: AGC INC.Inventors: Shigeki Sawamura, Kazutaka Ono
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Patent number: 10882778Abstract: A glass substrate includes, as a glass matrix composition as represented by mole percentage based on oxides, SiO2: 55%-75%, Al2O3: 2%-15%, MgO: 0%-10%, CaO: 0%-10%, SrO: 0%-10%, BaO: 0%-15%, ZrO2: 0%-5%, Na2O: 0%-20%, K2O: 5%-30%, and Li2O: 0%-5.0%. The glass substrate has a total content of alkali metal oxides, as represented by mole percentage based on oxides, of 10%-30%, a value obtained by dividing the total content of alkali metal oxides by the content of SiO2 of 0.50 or smaller, a value obtained by dividing the content of Na2O by a value obtained by subtracting the content of Al2O3 from a total content of Na2O and K2O of 0.90 or smaller, and an average coefficient of thermal expansion ?1 at 50° C.-350° C. of 11 ppm/° C.-16 ppm/° C.Type: GrantFiled: June 26, 2018Date of Patent: January 5, 2021Assignee: AGC Inc.Inventors: Shigeki Sawamura, Kazutaka Ono, Yu Hanawa
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Patent number: 10515864Abstract: The present invention provides a glass substrate in which in a step of sticking a glass substrate and a silicon-containing substrate to each other, bubbles hardly intrude therebetween. The present invention relates to a glass substrate for forming a laminated substrate by lamination with a silicon-containing substrate, having a warpage of 2 ?m to 300 ?m, and an inclination angle due to the warpage of 0.0004° to 0.12°.Type: GrantFiled: November 27, 2017Date of Patent: December 24, 2019Assignee: AGC Inc.Inventors: Yu Hanawa, Shigeki Sawamura, Shuhei Nomura, Kazutaka Ono, Nobuhiko Takeshita, Keisuke Hanashima
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Publication number: 20190385920Abstract: The present invention provides a glass substrate in which in a step of sticking a glass substrate and a silicon-containing substrate to each other, bubbles hardly intrude therebetween. The present invention relates to a glass substrate for forming a laminated substrate by lamination with a silicon-containing substrate, having a warpage of 2 ?m to 300 ?m, and an inclination angle due to the warpage of 0.0004° to 0.12°.Type: ApplicationFiled: August 29, 2019Publication date: December 19, 2019Applicant: AGC Inc.Inventors: Yu Hanawa, Shigeki Sawamura, Shuhei Nomura, Kazutaka Ono, Nobuhiko Takeshita, Keisuke Hanashima
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Publication number: 20190210327Abstract: 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 ? 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.Type: ApplicationFiled: March 15, 2019Publication date: July 11, 2019Applicant: AGC INC.Inventors: Shigeki SAWAMURA, Kazutaka ONO