Patents by Inventor Ryo Yoshimatsu
Ryo Yoshimatsu 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: 20230271888Abstract: One aspect of the present disclosure provides a production method for a composite, the method including: a cooling step of performing cooling under a pressurized condition in a state where a heated molten material of a thermosetting composition is brought into contact with a resin-impregnated body, in which the above-described resin-impregnated body includes a nitride sintered body having a porous structure and a semi-cured product of the thermosetting composition impregnated into the above-described nitride sintered body.Type: ApplicationFiled: May 13, 2021Publication date: August 31, 2023Applicant: Denka Company LimitedInventors: Nobuya SUZUKI, Saori INOUE, Yasuhisa UESHIMA, Ryo YOSHIMATSU, Ryuji KOGA
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Publication number: 20230227370Abstract: One aspect of the present disclosure provides a composite body including: a nitride sintered body having a porous structure; and a semi-cured product of a thermosetting composition impregnated into the above-described nitride sintered body, in which dielectric breakdown voltage is 4.5 kV or higher.Type: ApplicationFiled: May 13, 2021Publication date: July 20, 2023Applicant: Denka Company LimitedInventors: Nobuya SUZUKI, Saori INOUE, Yasuhisa UESHIMA, Ryo YOSHIMATSU, Ryuji KOGA
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Publication number: 20220250994Abstract: One aspect of the present invention is a method for producing a composite, including a step of placing a porous boron nitride sintered body immersed in a resin composition under a pressurized condition and then placing the boron nitride sintered body immersed in the resin composition under a pressure condition lower than the pressurized condition, wherein the step is repeated a plurality of times.Type: ApplicationFiled: March 26, 2020Publication date: August 11, 2022Applicant: Denka Company LimitedInventors: Saori INOUE, Shoji IWAKIRI, Yoshitaka MINAKATA, Ryo YOSHIMATSU, Ryuji KOGA, Tomoya YAMAGUCHI
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Publication number: 20220177375Abstract: One aspect of the present invention is a composite including: a porous boron nitride sintered body; and a resin filled in pores of the boron nitride sintered body, wherein the boron nitride sintered body has an average pore diameter of 3.5 ?m or less.Type: ApplicationFiled: March 26, 2020Publication date: June 9, 2022Applicant: Denka Company LimitedInventors: Saori INOUE, Shoji IWAKIRI, Yoshitaka MINAKATA, Ryo YOSHIMATSU, Ryuji KOGA, Tomoya YAMAGUCHI
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Patent number: 11279876Abstract: A phosphor in which an element represented by R? is solid-solutionized in a phosphor host crystal represented by M?(L, A)?X?, wherein M is at least one type of element selected from Mg, Ca, Sr, Ba and Zn, L is at least one type of element selected from Li, Na and K, A is at least one type of element selected from Al, Ga, B, In, Sc, Y, La and Si, X is at least one type of element selected from O, N, F and Cl (where all of X being N is excluded), R is at least one type of element selected from Mn, Cr, Ti, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho and Yb, ?, ?, ? and ? satisfy ?+?+?+?=9, 0.00<??1.30, 3.70???4.30, 3.70???4.30, and 0.00<??1.30.Type: GrantFiled: March 14, 2019Date of Patent: March 22, 2022Assignees: DENKA COMPANY LIMITED, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Hiroaki Toyoshima, Ryo Yoshimatsu, Taiyo Yamaura, Masato Akabane, Naoto Hirosaki
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Patent number: 11034623Abstract: A thermal conductive member includes: first and second surface layers including an insulating material A, and an intermediate layer including an insulating material B. The insulating material A includes a first boron nitride sintered body having an orientation degree of hexagonal boron nitride primary particles of 0.6 to 1.4, and a first heat curable resin composition impregnating in the first boron nitride sintered body. The insulating material B includes a second boron nitride sintered body having an orientation degree of hexagonal boron nitride primary particles of 0.01 to 0.05, and a second heat curable resin composition impregnating in the second boron nitride sintered body.Type: GrantFiled: March 28, 2018Date of Patent: June 15, 2021Assignee: DENKA COMPANY LIMITEDInventors: Saori Inoue, Toshitaka Yamagata, Yoshitaka Minakata, Ryo Yoshimatsu, Ryuji Koga
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Publication number: 20210017448Abstract: A phosphor in which an element represented by R? is solid-solutionized in a phosphor host crystal represented by M?(L, A)?X?, wherein M is at least one type of element selected from Mg, Ca, Sr, Ba and Zn, L is at least one type of element selected from Li, Na and K, A is at least one type of element selected from Al, Ga, B, In, Sc, Y, La and Si, X is at least one type of element selected from O, N, F and Cl (where all of X being N is excluded), R is at least one type of element selected from Mn, Cr, Ti, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho and Yb, ?, ?, ? and ? satisfy ?+?+?+?=9, 0.00<??1.30, 3.70???4.30, 3.70???4.30, and 0.00<??1.30.Type: ApplicationFiled: March 14, 2019Publication date: January 21, 2021Applicants: DENKA COMPANY LIMITED, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Hiroaki TOYOSHIMA, Ryo YOSHIMATSU, Taiyo YAMAURA, Masato AKABANE, Naoto HIROSAKI
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Publication number: 20200031723Abstract: A thermal conductive member includes: first and second surface layers including an insulating material A, and an intermediate layer including an insulating material B. The insulating material A includes a first boron nitride sintered body having an orientation degree of hexagonal boron nitride primary particles of 0.6 to 1.4, and a first heat curable resin composition impregnating in the first boron nitride sintered body. The insulating material B includes a second boron nitride sintered body having an orientation degree of hexagonal boron nitride primary particles of 0.01 to 0.05, and a second heat curable resin composition impregnating in the second boron nitride sintered body.Type: ApplicationFiled: March 28, 2018Publication date: January 30, 2020Applicant: DENKA COMPANY LIMITEDInventors: Saori INOUE, Toshitaka YAMAGATA, Yoshitaka MINAKATA, Ryo YOSHIMATSU, Ryuji KOGA
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Patent number: 10093854Abstract: The present invention relates to a complex oxynitride phosphor which is efficiently excited in the UV to near-UV wavelength region and emits green to yellow light, and a light emitting device using the phosphor. The phosphor according to the present invention is characterized in that it is represented by general formula: M1aM2bRecSidOeNf; wherein M1 is one or more elements selected from Y, Sc, La, and Al; M2 is one or more elements selected from Zn, Sr, Ba, Ca, and Mg; Re is one or more elements selected from Ce, Pr, Sm, Eu, Dy, Ho, Er, Tm, Yb, Ti, Cr, and Mn among rare-earth elements and transition metal elements; and a, b, c, d, e, and fin the formula satisfy the relationships: a+b+c=1, 0.20<b<0.50, 0.001<c<0.10, 2.5<d<4.1, 0.5<e<1.0, and 3.5<f<5.6.Type: GrantFiled: December 22, 2014Date of Patent: October 9, 2018Assignee: Denka Company LimitedInventors: Hiroaki Toyoshima, Ryo Yoshimatsu
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Publication number: 20180163128Abstract: The present invention relates to a complex oxynitride phosphor which is efficiently excited in the UV to near-UV wavelength region and emits green to yellow light, and a light emitting device using the phosphor. The phosphor according to the present invention is characterized in that it is represented by general formula: M1aM2bRecSidOeNf; wherein M1 is one or more elements selected from Y, Sc, La, and Al; M2 is one or more elements selected from Zn, Sr, Ba, Ca, and Mg; Re is one or more elements selected from Ce, Pr, Sm, Eu, Dy, Ho, Er, Tm, Yb, Ti, Cr, and Mn among rare-earth elements and transition metal elements; and a, b, c, d, e, and fin the formula satisfy the relationships: a+b+c=1, 0.20<b<0.50, 0.001<c<0.10, 2.5<d<4.1, 0.5<e<1.0, and 3.5<f<5.Type: ApplicationFiled: December 22, 2014Publication date: June 14, 2018Inventors: Hiroaki Toyoshima, Ryo Yoshimatsu
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Patent number: 9624428Abstract: A phosphor indicated by general formula MeaRebSicAldNeOf. In the formula: Me has Sr as an essential element thereof and can include one or more types of element selected from Na, Li, Mg, Ca, Ba, Sc, Y, and La; and Re has Eu as an essential element thereof and can include one or more types of element selected from Mn, Ce, Tb, Yb, and Sm. In addition, when a=1?x, b=x, c=(2+2p)×(1?y), d=(2+2p)×y, e=(1+4p)×(1?z), and f=(1+4p)×z, parameters p, x, y, and z fulfill the following: 1.620<p<1.635, 0.005<x<0.300, 0.200<y<0.250, and 0.070<z<0.110. A light-emitting device with high luminance is provided by using this phosphor.Type: GrantFiled: February 3, 2012Date of Patent: April 18, 2017Assignees: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, DENKA COMPANY LIMITEDInventors: Naoto Hirosaki, Ryo Yoshimatsu, Shintaro Watanabe
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Patent number: 9550939Abstract: [Problem to be Solved] Provided is a red emitting fluorescent material, which has a large excitation band and which is capable of efficiently emitting red fluorescence when excited by light emitted from an ultraviolet light emitting device and a blue light emitting device serving as an excitation source, in particular, even by use of an ultraviolet LED having an emission peak at near 390 nm to 400 nm, and which is capable of emitting red fluorescence when excited not only by ultraviolet and blue light from an ultraviolet light emitting device and a blue light emitting device but also by fluorescence emitted from a fluorescent material upon receipt these light beams, thereby emitting high brightness red light, and then, provided is a white light emitting device capable of emitting white light having excellent color reproducing and rendering properties.Type: GrantFiled: October 3, 2014Date of Patent: January 24, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventor: Ryo Yoshimatsu
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Patent number: 9512358Abstract: A phosphor with a high light-emitting intensity and indicated by general formula MeaRebSicAldNeOf. Me has Sr as an essential element thereof and can include one or more types of element selected from Na, Li, Mg, Ca, Ba, Sc, Y, and La. Re has Eu as an essential element thereof and can include one or more types of element selected from Mn, Ce, Tb, Yb, and Sm. When composition ratios a, b, c, d, e, and f fulfill a=1?x, b=x, c=(2+2p)×(1?y), d=(2+2p)×y, e=(1+4p)×(1?z), and f=(1+4p)×z, parameters p, x, y, and z fulfill the following: 1.630<p<1.650, 0.005<x<0.300, 0.180<y<0.220, and 0.060<z<0.100. A light-emitting device with high luminance is provided by using this phosphor.Type: GrantFiled: February 3, 2012Date of Patent: December 6, 2016Assignees: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, DENKA COMPANY LIMITEDInventors: Naoto Hirosaki, Ryo Yoshimatsu, Shintaro Watanabe
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Patent number: 9512979Abstract: A phosphor with a high light-emitting intensity, indicated by general formula MeaRebSicAld—NeOf. In the formula: Me has Sr as an essential element thereof and can include one or more types of element selected from Na, Li, Mg, Ca, Ba, Sc, Y, and La; and Re has Eu as an essential element thereof and can include one or more types of element selected from Mn, Ce, Tb, Yb, and Sm. When a=1?x, b=x, c=(2+2p)×(1?y), d=(2+2p)×y, e=(1+4p)×(1?z), and f=(1+4p)×z, parameters, p, x, y, and z fulfill the following: 1.610<p<1.620, 0.005<x<0.300, 0.190<y<0.260, and 0.060<z<0.120. A light-emitting device with high luminance is provided by using this phosphor.Type: GrantFiled: February 3, 2012Date of Patent: December 6, 2016Assignees: DENKA COMPANY LIMITED, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Naoto Hirosaki, Ryo Yoshimatsu, Shintaro Watanabe
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Patent number: 9399731Abstract: A blue phosphor having an emission peak wavelength different from that of conventional blue phosphors, a method for producing the same, and a high-intensity luminescent device using the phosphor are provided. The phosphor of the present invention is represented by a general formula MeaRebAlcSidOeNf (Me may contain one or more elements selected from Mg, Ca, Sc, Y, and La as second elements, provided that Sr or Ba is contained as an essential first element, and Re may contain one or more elements selected from Mn, Ce, Tb, Yb, and Sm as second elements, provided that Eu is contained as an essential first element), where the composition ratio represented by a, b, c, d, e, and f has the following relations: a+b=1, 0.005<b<0.25, 1.60<c<2.60, 2.50<d<4.05, 3.05<e<5.00, and 2.75<f<4.40.Type: GrantFiled: April 2, 2013Date of Patent: July 26, 2016Assignee: DENKA COMPANY LIMITEDInventors: Go Takeda, Ryo Yoshimatsu, Naoto Hirosaki
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Publication number: 20150055322Abstract: [Problem to be Solved] Provided is a red emitting fluorescent material, which has a large excitation band and which is capable of efficiently emitting red fluorescence when excited by light emitted from an ultraviolet light emitting device and a blue light emitting device serving as an excitation source, in particular, even by use of an ultraviolet LED having an emission peak at near 390 nm to 400 nm, and which is capable of emitting red fluorescence when excited not only by ultraviolet and blue light from an ultraviolet light emitting device and a blue light emitting device but also by fluorescence emitted from a fluorescent material upon receipt these light beams, thereby emitting high brightness red light, and then, provided is a white light emitting device capable of emitting white light having excellent color reproducing and rendering properties.Type: ApplicationFiled: October 3, 2014Publication date: February 26, 2015Inventor: Ryo YOSHIMATSU
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Patent number: 8894884Abstract: Provided is a red emitting fluorescent material, which has a large excitation band and which is capable of efficiently emitting red fluorescence when excited by light emitted from an ultraviolet light emitting device and a blue light emitting device serving as an excitation source, in particular, even by use of an ultraviolet LED having an emission peak at near 390 nm to 400 nm, and which is capable of emitting red fluorescence when excited not only by ultraviolet and blue light from an ultraviolet light emitting device and a blue light emitting device but also by fluorescence emitted from a fluorescent material upon receipt these light beams, thereby emitting high brightness red light, and then, provided is a white light emitting device capable of emitting white light having excellent color reproducing and rendering properties.Type: GrantFiled: October 23, 2013Date of Patent: November 25, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Ryo Yoshimatsu
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Publication number: 20140307415Abstract: A phosphor with a high light-emitting intensity, indicated by general formula MeaRebSicAld—NeOf. In the formula: Me has Sr as an essential element thereof and can include one or more types of element selected from Na, Li, Mg, Ca, Ba, Sc, Y, and La; and Re has Eu as an essential element thereof and can include one or more types of element selected from Mn, Ce, Tb, Yb, and Sm. When a=1?x, b=x, c=(2+2p)×(1?y), d=(2+2p)×y, e=(1+4p)×(1?z), and f=(1+4p)×z, parameters, p, x, y, and z fulfill the following: 1.610<p<1.620, 0.005<x<0.300, 0.190<y<0.260, and 0.060<z<0.120. A light-emitting device with high luminance is provided by using this phosphor.Type: ApplicationFiled: February 3, 2012Publication date: October 16, 2014Inventors: Naoto Hirosaki, Ryo Yoshimatsu, Shintaro Watanabe
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Patent number: 8852454Abstract: Provided is a red emitting fluorescent material, which has a large excitation band and which is capable of efficiently emitting red fluorescence when excited by light emitted from an ultraviolet light emitting device and a blue light emitting device serving as an excitation source, in particular, even by use of an ultraviolet LED having an emission peak at near 390 nm to 400 nm, and which is capable of emitting red fluorescence when excited not only by ultraviolet and blue light form an ultraviolet light emitting device and a blue light emitting device also by fluorescence emitted from a fluorescence material upon receipt these light beams, thereby emitting high brightness red light, and then, provided is a white light emitting device capable of emitting white light having excellent color reproducing and rendering properties.Type: GrantFiled: December 12, 2007Date of Patent: October 7, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Ryo Yoshimatsu
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Publication number: 20140167084Abstract: A blue phosphor having an emission peak wavelength different from that of conventional blue phosphors, a method for producing the same, and a high-intensity luminescent device using the phosphor are provided. The phosphor of the present invention is represented by a general formula MeaRebAlcSidOeNf (Me may contain one or more elements selected from Mg, Ca, Sc, Y, and La as second elements, provided that Sr or Ba is contained as an essential first element, and Re may contain one or more elements selected from Mn, Ce, Tb, Yb, and Sm as second elements, provided that Eu is contained as an essential first element), where the composition ratio represented by a, b, c, d, e, and f has the following relations: a+b=1, 0.005<b<0.25, 1.60<c<2.60, 2.50<d<4.05, 3.05<e<5.00, and 2.75<f<4.40.Type: ApplicationFiled: April 2, 2013Publication date: June 19, 2014Applicants: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Go Takeda, Ryo Yoshimatsu, Naoto Hirosaki