Patents by Inventor Tatsuya Takeguchi
Tatsuya Takeguchi 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).
-
Patent number: 11942429Abstract: A vertical repetition of multiple instances of a unit layer stack is formed over a substrate. The unit layer stack includes an insulating layer and a sacrificial material layer. Lateral recesses are formed by removing the sacrificial material layers selective to the insulating layers. Each lateral recess is sequentially fill with at least one conductive fill material and an insulating fill material, and vertically-extending portions of the at least one conductive fill material are removed such that a vertical layer stack including a first-type electrically conductive layer, a seamed insulating layer, and a second-type electrically conductive layer are formed in each lateral recess. Memory opening fill structures including a respective vertical stack of memory elements is formed through the insulating layers and the layer stacks. Memory openings, contact via cavities, or backside trenches may be used as access points for removing the sacrificial material layers.Type: GrantFiled: June 18, 2021Date of Patent: March 26, 2024Assignee: SANDISK TECHNOLOGIES LLCInventors: Tatsuya Hinoue, Naoki Takeguchi, Masanori Tsutsumi, Seiji Shimabukuro
-
Patent number: 10693145Abstract: A novel transition metal oxide catalyst that is equivalent to precious metal catalysts, and an air electrode and an air secondary battery using this catalyst are provided. The catalyst is a catalyst for an air electrode including a brownmillerite-type transition metal oxide and represented by General Formula (1) below: A2B1B2O5??(1) where A represents Ca, Sr, Ba, or a rare earth element(RE), B1 is a metal atom that forms a tetrahedral structure together with oxygen atoms, and B2 is a metal atom that forms an octahedral structure together with oxygen atoms. Disclosed are an air electrode for a metal-air secondary battery that includes the catalyst, and a metal-air secondary battery that includes an air electrode including the catalyst, a negative electrode including a negative electrode active material, and an electrolyte intervening between the air electrode and the negative electrode.Type: GrantFiled: January 30, 2015Date of Patent: June 23, 2020Assignees: NATIONAL UNIVERSITY CORPORATION HOKKAID UNIVERSITY, HITACHI ZOSEN CORPORATIONInventors: Etsushi Tsuji, Teruki Motohashi, Hiroki Habazaki, Hiroyuki Noda, Tatsuya Takeguchi
-
Patent number: 9695519Abstract: A positive electrode catalyst, for use in a positive electrode in a device provided with the positive electrode and a negative electrode, in which a reaction represented by 4OH??O2+2H2O+4e? is performed on a side of the positive electrode. The positive electrode catalyst includes a layered metal oxide, wherein the layered metal oxide is a Ruddlesden-Popper type layered perovskite represented by (La1-xAx) (Fe1-yBy)3(Sr1-zCz)3O10-a wherein, A is a rare earth element other than La, B is a transition metal other than Fe, and C is an alkaline earth metal other than Sr; and x satisfies an expression: 0?x<1, y satisfies an expression: 0?y<1, z satisfies an expression: 0?z<1, and a satisfies an expression: 0?a?3.Type: GrantFiled: January 28, 2014Date of Patent: July 4, 2017Assignees: SANTOKU CORPORATION, NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Nobuaki Ohguri, Hiroshi Takano, Tadatoshi Murota, Motofumi Matsuda, Tatsuya Takeguchi
-
Publication number: 20170098834Abstract: Provided is a fuel cell anode catalyst in which a platinum-ruthenium alloy is supported on a carbon material, and a manufacturing method therefor. The molar ratio (Pt:Ru) of the alloy is in the range of 1:1-5. When the coordination numbers of the Pt atom and the Ru atom of an atom site in the alloy, as measured by x-ray absorption fine structure, are expressed as N(Pt) and N(Ru) respectively, then N(Ru)/(N(Pt)+N(Ru)) in the platinum site is in the range of 0.8-1.1 times the theoretical value, and N(Pt)/(N(Ru)+N(Pt)) in the Ru site is in the range of 0.8-1.1 times the theoretical value. The average particle diameter of the alloy is in the range of 1-5 nm, and the standard deviation for the particle diameter is in the range of 2 nm or lower.Type: ApplicationFiled: December 14, 2016Publication date: April 6, 2017Inventors: Tatsuya TAKEGUCHI, Kiyotaka ASAKURA
-
Patent number: 9590261Abstract: Provided is solid electrolyte utilizing a composite oxide of a RP-type structure, that is useful for achieving strong electromotive force and enhanced current-voltage characteristics of a fuel battery, has enhanced ion conductivity and sufficiently inhibited electronic conductivity, and is capable of intercalation of a large amount of water or hydrogen groups, as well as a solid electrolyte membrane, a fuel battery cell, and a fuel battery. The solid electrolyte and the solid electrolyte membrane of the present invention has been obtained by subjecting a particular composite oxide of a RP-type structure or a membrane thereof to a treatment of at least one of hydroxylation and hydration, and has a property that the mass determined by TG measurement at 400° C. is less than that at 250° C. by not less than 4.0%.Type: GrantFiled: June 19, 2012Date of Patent: March 7, 2017Assignees: SANTOKU CORPORATION, National University Corporation Hokkaido UniversityInventors: Motofumi Matsuda, Tadatoshi Murota, Tatsuya Takeguchi
-
Publication number: 20160344037Abstract: A novel transition metal oxide catalyst that is equivalent to precious metal catalysts, and an air electrode and an air secondary battery using this catalyst are provided. The catalyst is a catalyst for an air electrode including a brownmillerite-type transition metal oxide and represented by General Formula (1) below: A2B1B2O5??(1) where A represents Ca, Sr, Ba, or a rare earth element(RE), B1 is a metal atom that forms a tetrahedral structure together with oxygen atoms, and B2 is a metal atom that forms an octahedral structure together with oxygen atoms. Disclosed are an air electrode for a metal-air secondary battery that includes the catalyst, and a metal-air secondary battery that includes an air electrode including the catalyst, a negative electrode including a negative electrode active material, and an electrolyte intervening between the air electrode and the negative electrode.Type: ApplicationFiled: January 30, 2015Publication date: November 24, 2016Inventors: Etsushi TSUJI, Teruki MOTOHASHI, Hiroki HABAZAKI, Hiroyuki NODA, Tatsuya TAKEGUCHI
-
Patent number: 9318765Abstract: Provided are a solid electrolyte membrane useful in achieving strong electromotive force in a fuel battery, and a fuel battery cell produced with this membrane. The solid electrolyte membrane includes a substrate made of a sheet material and having a plurality of openings penetrating the substrate in its thickness direction, and a solid electrolyte layer provided on at least one of the faces of the substrate. The fuel battery cell includes a solid electrolyte membrane having the solid electrolyte layer on one of the faces of the substrate, and a catalyst layer containing a precious metal and provided on the other of the faces of the substrate, with the solid electrolyte layer and the catalyst layer being in contact with each other in the openings of the substrate.Type: GrantFiled: March 1, 2011Date of Patent: April 19, 2016Assignees: SANTOKU CORPORATION, National University Corporation Hokkaido UniversityInventors: Motofumi Matsuda, Tadatoshi Murota, Tatsuya Takeguchi, Wataru Ueda
-
Publication number: 20150361567Abstract: A positive electrode catalyst, for use in a positive electrode in a device provided with the positive electrode and a negative electrode, in which a reaction represented by 4 OH??O2+2 H2O+4 e? is performed on a side of the positive electrode. The positive electrode catalyst includes a layered metal oxide, wherein the layered metal oxide is a Ruddlesden-Popper type layered perovskite represented by (La1?xAx) (Fe1?yBy)3(Sr1?zCz)3O10?a wherein, A is a rare earth element other than La, B is a transition metal other than Fe, and C is an alkaline earth metal other than Sr; and x satisfies an expression: 0?x<1, y satisfies an expression: 0?y<1, z satisfies an expression: 0?z<1, and a satisfies an expression: 0?a?3.Type: ApplicationFiled: January 28, 2014Publication date: December 17, 2015Applicants: FUJI ELECTRIC CO., LTD., SANTOKU CORPORATION, NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Nobuaki OHGURI, Hiroshi TAKANO, Tadatoshi MUROTA, Motofumi MATSUDA, Tatsuya TAKEGUCHI
-
Patent number: 8986894Abstract: A solid electrolyte including a layered metal oxide represented by the formula (1), (La1-xAx)(Sr1-yBy)3(Co1-zCz)3O10-???(1) [wherein A represents a rare earth element other than La; B represents Mg, Ca, or Ba; C represents Ti, V, Cr, or Mn; 0?x<1, 0?y<1, 0?z<1; and ? represents an oxygen deficiency amount].Type: GrantFiled: February 7, 2012Date of Patent: March 24, 2015Assignees: Toyota Jidosha Kabushiki Kaisha, National University Corporation Hokkaido UniversityInventors: Haruyuki Nakanishi, Tatsuya Takeguchi, Hiroki Takahashi, Ayaka Nakamura, Saburo Hosokawa
-
Patent number: 8962217Abstract: Provided is a fuel cell which can obtain a sufficiently high electromotive force even under a low-temperature condition such as room temperature without using a deleterious substance or platinum. This fuel cell uses an electrolyte layer containing a layer-shaped metal oxide which has been subjected to the steam treatment.Type: GrantFiled: July 10, 2009Date of Patent: February 24, 2015Assignee: National University Corporation Hokkaido UniversityInventors: Wataru Ueda, Tatsuya Takeguchi
-
Publication number: 20140162174Abstract: Provided is solid electrolyte utilizing a composite oxide of a RP-type structure, that is useful for achieving strong electromotive force and enhanced current-voltage characteristics of a fuel battery, has enhanced ion conductivity and sufficiently inhibited electronic conductivity, and is capable of intercalation of a large amount of water or hydrogen groups, as well as a solid electrolyte membrane, a fuel battery cell, and a fuel battery. The solid electrolyte and the solid electrolyte membrane of the present invention has been obtained by subjecting a particular composite oxide of a RP-type structure or a membrane thereof to a treatment of at least one of hydroxylation and hydration, and has a property that the mass determined by TG measurement at 400° C. is less than that at 250° C. by not less than 4.0%.Type: ApplicationFiled: June 19, 2012Publication date: June 12, 2014Applicants: National University Corporationa Hokkaido University, SANTOKU CORPORATIONInventors: Motofumi Matsuda, Tadatoshi Murota, Tatsuya Takeguchi
-
Publication number: 20140017594Abstract: Provided is a fuel cell anode catalyst in which a platinum-ruthenium alloy is supported on a carbon material, and a manufacturing method therefor. The molar ratio (Pt:Ru) of the alloy is in the range of 1:1-5. When the coordination numbers of the Pt atom and the Ru atom of an atom site in the alloy, as measured by x-ray absorption fine structure, are expressed as N(Pt) and N(Ru) respectively, then N(Ru)/(N(Pt)+N(Ru)) in the platinum site is in the range of 0.8-1.1 times the theoretical value, and N(Pt)/(N(Ru)+N(Pt)) in the Ru site is in the range of 0.8-1.1 times the theoretical value. The average particle diameter of the alloy is in the range of 1-5 nm, and the standard deviation for the particle diameter is in the range of 2 nm or lower.Type: ApplicationFiled: March 21, 2012Publication date: January 16, 2014Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Tatsuya Takeguchi, Kiyotaka Asakura
-
Publication number: 20120328971Abstract: Provided are a solid electrolyte membrane useful in achieving strong electromotive force in a fuel battery, and a fuel battery cell produced with this membrane. The solid electrolyte membrane includes a substrate made of a sheet material and having a plurality of openings penetrating the substrate in its thickness direction, and a solid electrolyte layer provided on at least one of the faces of the substrate. The fuel battery cell includes a solid electrolyte membrane having the solid electrolyte layer on one of the faces of the substrate, and a catalyst layer containing a precious metal and provided on the other of the faces of the substrate, with the solid electrolyte layer and the catalyst layer being in contact with each other in the openings of the substrate.Type: ApplicationFiled: March 1, 2011Publication date: December 27, 2012Applicants: NATIONAL UNIV. CORPORATION HOKKAIDO UNIV., SANTOKU CORPORATIONInventors: Motofumi Matsuda, Tadatoshi Murota, Tatsuya Takeguchi, Wataru Ueda
-
Patent number: 8252486Abstract: Disclosed is an electrode catalyst for solid polymer fuel cells wherein CO tolerance is improved. Specifically disclosed is a catalyst for fuel cells having a first catalyst and a second catalyst. The first catalyst contains Pd, C and an oxide, namely SnO2 or TiO2, and the second catalyst contains C and an alloy containing Pt and Ru.Type: GrantFiled: July 14, 2006Date of Patent: August 28, 2012Assignees: Kyoto University, National University Corporation Hokkaido UniversityInventors: Ryuji Kikuchi, Tatsuya Takeguchi
-
Publication number: 20120202128Abstract: A solid electrolyte including a layered metal oxide represented by the formula (1), (La1-xAx)(Sr1-yBy)3(Co1-zCz)3O10-???(1) [wherein A represents a rare earth element other than La; B represents Mg, Ca, or Ba; C represents Ti, V, Cr, or Mn; 0?x?1, 0?y?1, 0?z<1; and ? represents an oxygen deficiency amount].Type: ApplicationFiled: February 7, 2012Publication date: August 9, 2012Applicants: National University Corporation Hokkaido University, Toyota Jidosha Kabushiki KaishaInventors: Haruyuki Nakanishi, Tatsuya Takeguchi, Hiroki Takahashi, Ayaka Nakamura, Saburo Hosokawa
-
Publication number: 20110143259Abstract: Provided is a fuel cell which can obtain a sufficiently high electromotive force even under a low-temperature condition such as room temperature without using a deleterious substance or platinum. This fuel cell uses an electrolyte layer containing a layer-shaped metal oxide which has been subjected to the steam treatment.Type: ApplicationFiled: July 10, 2009Publication date: June 16, 2011Inventors: Wataru Ueda, Tatsuya Takeguchi
-
Publication number: 20090181285Abstract: Disclosed is an electrode catalyst for solid polymer fuel cells wherein CO tolerance is improved. Specifically disclosed is a catalyst for fuel cells having a first catalyst and a second catalyst. The first catalyst contains Pd, C and an oxide, namely SnO2 or TiO2, and the second catalyst contains C and an alloy containing Pt and Ru.Type: ApplicationFiled: July 14, 2006Publication date: July 16, 2009Inventors: Ryuji Kikuchi, Tatsuya Takeguchi