Patents by Inventor Yukinori Koyama
Yukinori Koyama 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: 20230262971Abstract: A semiconductor storage device includes a substrate; a plurality of first conductive layers arranged in a first direction intersecting the substrate and extending in a second direction intersecting the first direction; a semiconductor layer extending in the first direction and disposed adjacent the plurality of first conductive layers; and a plurality of first charge storage layers arranged in the first direction, each of the first charge storage layers provided between a corresponding one of the plurality of first conductive layers and the semiconductor layer. Each of the first charge storage layers includes silicon (Si) and at least one of germanium (Ge), tin (Sn), magnesium (Mg), or carbon (C).Type: ApplicationFiled: August 26, 2022Publication date: August 17, 2023Applicant: Kioxia CorporationInventors: Yukinori KOYAMA, Takayuki ISHIKAWA, Shinji NAKADA
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Patent number: 10651186Abstract: A semiconductor memory device includes a substrate, a first electrode, a second electrode, a signal line, a first charge storage film and a second charge storage film. The first and second electrodes extend in a first direction parallel to the substrate. The first electrode has first and second surfaces. The second electrode has third and fourth surfaces. The spacing between the second and fourth surfaces is larger than the spacing between the first and third surfaces. The signal line is provided between the second surface and the fourth surface and extends in a second direction perpendicular to the substrate. The first charge storage film is provided between the signal line and the second surface. The second charge storage film is provided between the signal line and the fourth surface. In a cross section parallel to the substrate, the signal line has a contour having different curvatures.Type: GrantFiled: September 5, 2018Date of Patent: May 12, 2020Assignee: TOSHIBA MEMORY CORPORATIONInventor: Yukinori Koyama
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Publication number: 20190287983Abstract: A semiconductor memory device includes a substrate, a first electrode, a second electrode, a signal line, a first charge storage film and a second charge storage film. The first and second electrodes extend in a first direction parallel to the substrate. The first electrode has first and second surfaces. The second electrode has third and fourth surfaces. The spacing between the second and fourth surfaces is larger than the spacing between the first and third surfaces. The signal line is provided between the second surface and the fourth surface and extends in a second direction perpendicular to the substrate. The first charge storage film is provided between the signal line and the second surface. The second charge storage film is provided between the signal line and the fourth surface. In a cross section parallel to the substrate, the signal line has a contour having different curvatures.Type: ApplicationFiled: September 5, 2018Publication date: September 19, 2019Applicant: TOSHIBA MEMORY CORPORATIONInventor: Yukinori KOYAMA
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Patent number: 10153491Abstract: A secondary battery in which the difference between the voltage at the time of discharging and the voltage at the time of charging is small, ensuring good energy efficiency, and the charge/discharge life is long. Therefore, in order to attain the above-described object, a secondary battery containing a positive electrode, a negative electrode, and an electrolytic solution, wherein at least one of the positive electrode and the negative electrode contains, as the active material, at least one selected from the group consisting of a metal ion-containing fluoride, a metal oxide, a metal sulfide, a metal nitride, and a metal phosphide; the electrolytic solution contains an anion receptor; and the anion receptor forms a salt or a complex with an anion contained in the active material, thereby enabling the active material to dissolve in the electrolytic solution.Type: GrantFiled: December 19, 2014Date of Patent: December 11, 2018Assignees: KYOTO UNIVERSITY, TOYOTA JIDOSHA KABUSHIKI KAISHA, HONDA MOTOR CO., LTD.Inventors: Zempachi Ogumi, Toshiro Hirai, Jun-ichi Yamaki, Hideyuki Horino, Ken-ichi Okazaki, Yukinori Koyama
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Publication number: 20170033359Abstract: A secondary battery in which the difference between the voltage at the time of discharging and the voltage at the time of charging is small, ensuring good energy efficiency, and the charge/discharge life is long. Therefore, in order to attain the above-described object, a secondary battery containing a positive electrode, a negative electrode, and an electrolytic solution, wherein at least one of the positive electrode and the negative electrode contains, as the active material, at least one selected from the group consisting of a metal ion-containing fluoride, a metal oxide, a metal sulfide, a metal nitride, and a metal phosphide; the electrolytic solution contains an anion receptor; and the anion receptor forms a salt or a complex with an anion contained in the active material, thereby enabling the active material to dissolve in the electrolytic solution.Type: ApplicationFiled: December 19, 2014Publication date: February 2, 2017Applicants: KYOTO UNIVERSITY, TOYOTA JIDOSHA KABUSHIKI KAISHA, HONDA MOTOR CO., LTD.Inventors: Zempachi OGUMI, Toshiro HIRAI, Jun-ichi YAMAKI, Hideyuki HORINO, Ken-ichi OKAZAKI, Yukinori KOYAMA
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Patent number: 9419280Abstract: A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below, LiFe1?xMxP1?ySiyO4??(1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0<x?0.5; and y=x×({valence of M}?2)+(1?x)×({average valence of Fe}?2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.Type: GrantFiled: December 18, 2014Date of Patent: August 16, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Koji Ohira, Motoaki Nishijima, Toshitsugu Sueki, Shogo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
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Patent number: 9373844Abstract: A positive electrode active substance including a lithium-containing metal oxide represented by the following general formula (1): LiFe1-xMxP1-ySiyO4??(1) wherein M represents an element selected from Sn, Zr, Y, and Al; 0<x<1; and 0<y<1, wherein the lithium-containing metal oxide has a lattice constant and a half value width of a diffraction peak of a (011) plane.Type: GrantFiled: November 14, 2013Date of Patent: June 21, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Koji Ohira, Motoaki Nishijima, Toshitsugu Sueki, Shougo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
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Patent number: 9350022Abstract: A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below, LiFe1-xMxP1-ySiyO4??(1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0<x?0.5; and y=x×({valence of M}?2)+(1?x)×({average valence of Fe}?2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.Type: GrantFiled: December 18, 2014Date of Patent: May 24, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Koji Ohira, Motoaki Nishijima, Toshitsugu Sueki, Shogo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
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Patent number: 9337489Abstract: A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below, LiFe1?xMxP1?ySiyO4??(1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0<x?0.5; and y=x×({valence of M}?2)+(1?x)×({average valence of Fe}?2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.Type: GrantFiled: February 23, 2015Date of Patent: May 10, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Koji Ohira, Motoaki Nishijima, Toshitsugu Sueki, Shogo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
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Positive electrode active material, positive electrode, and nonaqueous-electrolyte secondary battery
Patent number: 9293234Abstract: Provided is a positive electrode active material giving nonaqueous-electrolyte secondary batteries superior in cycle characteristics. The positive electrode active material according to the present invention includes a lithium-containing composite metal oxide having the composition represented by the following General Formula (1): LizFe1-xMxP1-ySiyO4??(1) (wherein M is at least one metal element selected from Zr, Sn, Y, and Al, 0.05<x<1, and 0.05<y<1), characterized in that: the positive electrode active material is in the single crystalline phase of the lithium-containing composite oxide represented by General Formula (1) when 1>z>0.9 to 0.75 or 0.25 to 0.1>z>0; the positive electrode active material has two crystalline phases of the lithium-containing composite oxides represented by the following General Formulae (2) and (3) when 0.9 to 0.75>z>0.25 to 0.1: LiaFe1-xMxP1-ySiyO4??(2) (wherein 0.75 to 0.9?a?1.00, 0.05<x<1, and 0.Type: GrantFiled: June 16, 2011Date of Patent: March 22, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Motoaki Nishijima, Koji Ohira, Toshitsugu Sueki, Shougo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai -
Patent number: 9171886Abstract: A semiconductor memory device according to embodiments includes a semiconductor substrate and plural switching transistors provided on the semiconductor substrate. In the semiconductor memory device, a contact plug is embedded between adjacent two of the switching transistors, and is insulated from gates of the adjacent two switching transistors. The contact plug is also electrically connected to a source or a drain of each of the adjacent two switching transistors, and an upper surface of the contact plug is at a position higher than an upper surface of the switching transistors. A memory element is provided on the upper surface of the contact plug and stores data. A wiring is provided on the memory element.Type: GrantFiled: February 22, 2011Date of Patent: October 27, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Hiroyuki Kanaya, Yukinori Koyama, Susumu Shuto, Kuniaki Sugiura
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Publication number: 20150263022Abstract: The peripheral transistor includes at least a first peripheral transistor and a second peripheral transistor. The first peripheral transistor and the second peripheral transistor each comprise: a first gate electrode formed on a gate insulating film; an inter-gate insulating film formed on a surface of the first gate electrode; a through-hole formed in the inter-gate insulating film; a connecting layer formed in the through-hole; and a second gate electrode formed on a surface of the inter-gate insulating film and connected to the first gate electrode via the connecting layer. The first gate electrode of the first peripheral transistor is configured by only a semiconductor layer of a first conductivity type. The first gate electrode of the second peripheral transistor comprises a first semiconductor layer of the first conductivity type and a second semiconductor layer of a second conductivity type aligned with the first semiconductor layer along a gate length direction.Type: ApplicationFiled: June 24, 2014Publication date: September 17, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yukinori KOYAMA, Toshitaka Miyata
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Publication number: 20150171429Abstract: A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below, LiFe1-xMxP1-ySiyO4 ??(1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0<x?0.5; and y=x×({valence of M}?2)+(1?x)×({average valence of Fe}?2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.Type: ApplicationFiled: February 23, 2015Publication date: June 18, 2015Inventors: Koji OHIRA, Motoaki NISHIJIMA, Toshitsugu SUEKI, Shogo ESAKI, Isao TANAKA, Yukinori KOYAMA, Katsuhisa TANAKA, Koji FUJITA, Shunsuke MURAI
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Patent number: 9017876Abstract: A method of producing a positive electrode active material, comprising the steps of: preparing a solution by dissolving, in a solvent, respective predetermined amounts of a lithium source, a M source, a phosphorus source and a X source necessary for forming a positive electrode active material represented by the following general formula (1) having an olivine structure; gelating the obtained solution by addition of a cyclic ether; and calcinating the generated gel to obtain a carbon-coated lithium-containing composite oxide, wherein the positive electrode active material is represented by the general formula (1): LixMyP1-zXzO4??(1) wherein M is at least one element selected from the group consisting of Fe, Ni, Mn, Zr, Sn, Al and Y, X is at least one selected from the group consisting of Si and Al, and 0<x?2, 0.8?y?1.2, 0?z?1.Type: GrantFiled: October 18, 2011Date of Patent: April 28, 2015Assignee: Sharp Kabushiki KaishaInventors: Toshitsugu Sueki, Motoaki Nishijima, Koji Ohira, Shogo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
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Publication number: 20150104709Abstract: A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below, LiFe1-xMxP1-ySiyO4??(1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0<x?0.5; and y=x×({valence of M}?2)+(1?x)×({average valence of Fe}?2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.Type: ApplicationFiled: December 18, 2014Publication date: April 16, 2015Inventors: Koji OHIRA, Motoaki NISHIJIMA, Toshitsugu SUEKI, Shogo ESAKI, Isao TANAKA, Yukinori KOYAMA, Katsuhisa TANAKA, Koji FUJITA, Shunsuke MURAI
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Publication number: 20150104710Abstract: A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below, LiFe1?xMxP1-ySiyO4??(1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0<x?0.5; and y=x×({valence of M}?2)+(1?x)×({average valence of Fe}?2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.Type: ApplicationFiled: December 18, 2014Publication date: April 16, 2015Inventors: Koji OHIRA, Motoaki NISHIJIMA, Toshitsugu SUEKI, Shogo ESAKI, Isao TANAKA, Yukinori KOYAMA, Katsuhisa TANAKA, Koji FUJITA, Shunsuke MURAI
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Patent number: 8999576Abstract: A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below, LiFe1-xMxP1-ySiyO4??(1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0<x?0.5; and y=x×({valence of M}?2)+(1?x)×({average valence of Fe}?2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.Type: GrantFiled: May 20, 2010Date of Patent: April 7, 2015Assignee: Sharp Kabushiki kaishaInventors: Koji Ohira, Motoaki Nishijima, Toshitsugu Sueki, Shogo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
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Patent number: 8968936Abstract: The present invention provides a method for producing a lithium-containing composite oxide represented by general formula (1) below, the method at least including a step of preparing a solution by dissolving a lithium source, an element M source, a phosphorus source, and an element X source that serve as source materials in a solvent, the phosphorus source being added after at least the element M source is dissolved; a step of gelating the resulting solution; and a step of calcining the resulting gel: LixMyP1-zXzO4??(1) (where M represents at least one element selected from the group consisting of Fe, Ni, Mn, Zr, Sn, Al, and Y; X represents at least one element selected from the group consisting of Si and Al; and 0<x?2, 0.8?y?1.2, 0?z?1). According to the present invention, a positive electrode active material for lithium secondary batteries that offers high safety and high cost efficiency and are capable of extending battery life can be provided.Type: GrantFiled: June 1, 2011Date of Patent: March 3, 2015Assignee: Sharp Kabushiki KaishaInventors: Motoaki Nishijima, Koji Ohira, Toshitsugu Sueki, Shougo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
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Publication number: 20140178765Abstract: A positive electrode active substance including a lithium-containing metal oxide represented by the following general formula (1): LiFe1-xMxP1-ySiyO4??(1) wherein M represents an element selected from Sn, Zr, Y, and Al; 0<x<1; and 0<y<1, wherein the lithium-containing metal oxide has a lattice constant and a half value width of a diffraction peak of a (011) plane.Type: ApplicationFiled: November 14, 2013Publication date: June 26, 2014Applicant: Sharp Kabushiki KaishaInventors: KOJI OHIRA, Motoaki Nishijima, Toshitsugu Sueki, Shougo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
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Patent number: 8609280Abstract: A positive electrode active substance comprising a lithium-containing metal oxide represented by the following general formula (1): LiFe1-xMxP1-ySiyO4??(1) wherein M represents an element selected from group III to group XIV; 0<x<1; and 0<y<1, having a volume of a unit lattice of 291.4 to 300.0 ?3 or 285.0 to 291.0 ?3, and having a half value width of a diffraction peak of a (011) surface of 0.30° or more.Type: GrantFiled: July 1, 2011Date of Patent: December 17, 2013Assignee: Sharp Kabushiki KaishaInventors: Koji Ohira, Motoaki Nishijima, Toshitsugu Sueki, Shougo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai