Patents by Inventor Akira Sakawaki

Akira Sakawaki 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: 11561266
    Abstract: Reduction of the S/N in an output from a magnetic sensor using the magnetic impedance effect is suppressed. A magnetic sensor 1 is provided with a sensitive element 31 including: plural soft magnetic material layers 105; and a nonmagnetic amorphous metal layer 106 provided between the plural soft magnetic material layers 105, wherein the soft magnetic material layers 105 facing each other with the nonmagnetic amorphous metal layer 106 interposed therebetween are antiferromagnetically coupled to sense a magnetic field by a magnetic impedance effect.
    Type: Grant
    Filed: September 2, 2021
    Date of Patent: January 24, 2023
    Assignee: SHOWA DENKO K.K.
    Inventors: Daizo Endo, Akira Sakawaki
  • Publication number: 20230009139
    Abstract: A magnetic sensor includes: plural sensitive elements 31 each including a soft magnetic material layer 105 having a longitudinal direction and a transverse direction and a conductor layer having higher conductivity than the soft magnetic material layer 105 and extending through the soft magnetic material layer 105 in a longitudinal direction, the sensitive element 31 having uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction and being configured to sense a magnetic field by a magnetic impedance effect; and a connecting portion 32 continuous with the conductor layer of the sensitive element and configured to connect transversely adjacent sensitive elements 31 in series.
    Type: Application
    Filed: November 17, 2020
    Publication date: January 12, 2023
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Tatsunori SHINO, Akira SAKAWAKI, Sho TONEGAWA, Yasumasa WATANABE
  • Publication number: 20220381853
    Abstract: A magnetic sensor includes: a non-magnetic substrate; and a sensitive element 31 having a longitudinal direction and a short direction, provided with uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, and sensing a magnetic field by a magnetic impedance effect, wherein the sensitive element 31 includes plural soft magnetic material layers 105a to 105d and plural non-magnetic material layers 106a to 106c configured with a non-magnetic material and laminated between the plural soft magnetic material layers 105a to 105d, and the soft magnetic material layers 105a to 105d facing each other with each of the non-magnetic material layers 106a to 106c interposed therebetween are antiferromagnetically coupled.
    Type: Application
    Filed: November 17, 2020
    Publication date: December 1, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Tatsunori SHINO, Akira SAKAWAKI, Sho TONEGAWA, Yasumasa WATANABE
  • Publication number: 20220308128
    Abstract: A magnetic sensor 1 includes: a non-magnetic substrate 10; and a sensitive element 30 disposed on the substrate 10. The sensitive element 30 has a longitudinal direction and a transverse direction and has a uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction. The sensitive element 30 is configured to sense a magnetic field by a magnetic impedance effect. The sensitive element 30 includes a soft magnetic material layer 101 made of an amorphous alloy based on Co and having a saturation magnetization of greater than or equal to 300 emu/cc and less than or equal to 650 emu/cc.
    Type: Application
    Filed: March 23, 2022
    Publication date: September 29, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Akira SAKAWAKI
  • Publication number: 20220308124
    Abstract: Sensitivity of a magnetic sensor using the magnetic impedance effect is improved. A magnetic sensor includes: a non-magnetic substrate; a sensitive element provided on the substrate, including a soft magnetic material, having a longitudinal direction and a short direction, provided with uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction, and sensing a magnetic field by a magnetic impedance effect; and a protrusion part including a soft magnetic material and protruding from an end portion in the longitudinal direction of the sensitive element.
    Type: Application
    Filed: March 15, 2022
    Publication date: September 29, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Sho TONEGAWA, Akira Sakawaki, Rimpei Kindaichi
  • Publication number: 20220206087
    Abstract: It is aimed at improving sensitivity of a magnetic sensor using the magnetic impedance effect. A magnetic sensor includes: a non-magnetic substrate; and a sensitive element including a soft magnetic material layer composed of an amorphous alloy with an initial magnetic permeability of 5,000 or more, the soft magnetic material layer being provided on the substrate, having a longitudinal direction and a short direction, being provided with uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, and sensing a magnetic field by a magnetic impedance effect.
    Type: Application
    Filed: November 15, 2021
    Publication date: June 30, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Akira SAKAWAKI
  • Publication number: 20220128634
    Abstract: In a magnetic sensor using a magnetic impedance effect, sensitivity is improved as compared to the case where a width of a sensitive element in the short direction is equal from one end to the other end in the longitudinal direction. The magnetic sensor includes: a non-magnetic substrate; and a sensitive element that is provided on the substrate, composed of a soft magnetic material, having a longitudinal direction and a short direction, provided with uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, having a width at a center portion in the longitudinal direction that is smaller compared to a width at each of both end portions in the longitudinal direction, and sensing a magnetic field by a magnetic impedance effect.
    Type: Application
    Filed: October 12, 2021
    Publication date: April 28, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Sho TONEGAWA, Akira Sakawaki, Yasumasa Watanabe, Daizo Endo, Tomoyuki Noguchi, Yuta Miyamoto
  • Publication number: 20220099760
    Abstract: Reduction of the S/N in an output from a magnetic sensor using the magnetic impedance effect is suppressed. A magnetic sensor 1 is provided with a sensitive element 31 including: plural soft magnetic material layers 105; and a nonmagnetic amorphous metal layer 106 provided between the plural soft magnetic material layers 105, wherein the soft magnetic material layers 105 facing each other with the nonmagnetic amorphous metal layer 106 interposed therebetween are antiferromagnetically coupled to sense a magnetic field by a magnetic impedance effect.
    Type: Application
    Filed: September 2, 2021
    Publication date: March 31, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Akira Sakawaki
  • Publication number: 20210194040
    Abstract: A lithium-ion rechargeable battery 1 includes: a stainless-steel substrate 10; a negative electrode layer 20 that contains a negative-electrode active material and is laminated on the substrate 10; a solid electrolyte layer that contains an inorganic solid electrolyte having lithium-ion conductivity and is laminated on the negative electrode layer 20; a positive electrode layer 40 that contains a positive-electrode active material and is laminated on the solid electrolyte layer 30; and a positive electrode collector layer 50 that is composed of titanium and is laminated on the positive electrode layer 40. The boundary portion of the solid electrolyte layer 30 and the positive electrode layer 40 in the lithium-ion rechargeable battery 1 is provided with a mixture layer 70 in which the positive-electrode active material and the inorganic solid electrolyte are mixed. These increase the discharge capacity of the all-solid lithium-ion rechargeable battery.
    Type: Application
    Filed: January 19, 2018
    Publication date: June 24, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Takaki YASUDA, Akira SAKAWAKI, Tatsunori SHINO
  • Publication number: 20210175512
    Abstract: A lithium-ion rechargeable battery (1) includes: a positive electrode layer (30) containing a positive electrode active material; a solid electrolyte layer (40) containing an inorganic solid electrolyte; a storage layer (50) made of porous platinum (Pt) and storing lithium; a coating layer (60) made of an amorphous metal or alloy; and a negative electrode collector layer (70) made of platinum (Pt); these layers are stacked in this order.
    Type: Application
    Filed: November 20, 2018
    Publication date: June 10, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Haruaki UCHIDA, Akira SAKAWAKI, Takaki YASUDA
  • Publication number: 20200381701
    Abstract: A method for manufacturing a lithium-ion rechargeable battery (1), the lithium-ion rechargeable battery including: a positive electrode layer (30) containing a positive electrode active material; a solid electrolyte layer (40) containing an inorganic solid electrolyte; a storage layer (50) made of porous platinum (Pt) and storing lithium; a coating layer (60) made of an amorphous chromium-titanium (CrTi) alloy; and a negative electrode collector layer (70) made of platinum (Pt); these layers are stacked in this order. The storage layer (50) is first composed of a dense platinum layer formed by sputtering, and then undergoes initial charge and discharge to become porous, which results in a porous part (51) and a number of pores (52) being formed. This method of manufacturing the lithium-ion rechargeable battery (1) restrains or prevents peeling inside the all-solid lithium-ion rechargeable battery.
    Type: Application
    Filed: November 26, 2018
    Publication date: December 3, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Takaki YASUDA, Akira SAKAWAKI, Haruaki UCHIDA
  • Publication number: 20200350619
    Abstract: A lithium-ion rechargeable battery (1) includes: a positive electrode layer (30) containing a positive electrode active material; a solid electrolyte layer (40) containing an inorganic solid electrolyte; a storage layer (50) made of porous platinum (Pt) and storing lithium; a coating layer (60) made of an amorphous chromium-titanium (CrTi) alloy; and a negative electrode collector layer (70) made of platinum (Pt); these layers are stacked in this order. The storage layer (50) is first composed of a dense platinum layer formed by sputtering, and then undergoes initial charge and discharge to become porous, which results in a porous part (51) and a number of pores (52) being formed. This restrains or prevents peeling inside the all-solid lithium-ion rechargeable battery.
    Type: Application
    Filed: November 26, 2018
    Publication date: November 5, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Takaki YASUDA, Akira SAKAWAKI, Haruaki UCHIDA
  • Publication number: 20200274191
    Abstract: A lithium-ion rechargeable battery (1) including: a substrate (10); a negative electrode collector layer (20) made of metal; a negative electrode layer (30) containing a negative-electrode active material; a solid electrolyte layer (40) containing an inorganic solid electrolyte; a positive electrode layer (60) containing a positive-electrode active material and the inorganic solid electrolyte; and a mixture layer (50) containing the positive-electrode active material and the inorganic solid electrolyte provided between the solid electrolyte layer (40) and the positive electrode layer (60), the ratio of the positive-electrode active material therein being lower than that in the positive electrode layer (60). Also disclosed is a method for producing a lithium-ion rechargeable battery.
    Type: Application
    Filed: July 23, 2018
    Publication date: August 27, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Takaki YASUDA, Akira SAKAWAKI, Tatsunori SHINO
  • Publication number: 20200259171
    Abstract: A lithium-ion rechargeable battery (1) includes: a positive electrode layer (20) containing a positive electrode active material; a solid electrolyte layer (30) containing an inorganic solid electrolyte having lithium ion conductivity; and a negative electrode collector layer (50) serving as a negative electrode. The negative electrode collector layer (50) includes: a storage layer (51) containing multiple columnar crystals made of metal titanium and each extending in a thickness direction; and a coating layer (52) coating the storage layer (51). By a charging operation of the lithium-ion rechargeable battery (1), a negative electrode (40) made of metal lithium is formed at grain boundaries inside the storage layer (51). This prevents peeling inside the all-solid lithium-ion rechargeable battery.
    Type: Application
    Filed: August 22, 2018
    Publication date: August 13, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Haruaki UCHIDA, Akira SAKAWAKI, Takaki YASUDA
  • Publication number: 20200185761
    Abstract: A lithium-ion rechargeable battery (1) includes: a substrate (10); a positive electrode collector layer (20) stacked on the substrate (10); a positive electrode layer (30) stacked on the positive electrode collector layer (20); an inorganic solid electrolyte layer (40) stacked on the positive electrode layer (30); a negative electrode layer (50) stacked on the inorganic solid electrolyte layer (40); and a negative electrode collector layer (60) stacked on the negative electrode layer (50). The positive electrode layer (30) contains a mixture of an amorphized, solid electrolyte region (31) containing an inorganic solid electrolyte and a crystallized, positive electrode region (32) containing a positive electrode active material.
    Type: Application
    Filed: July 4, 2018
    Publication date: June 11, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Akira SAKAWAKI, Tatsunori SHINO, Takaki YASUDA
  • Publication number: 20200165719
    Abstract: The sputtering target 100 used in forming a positive electrode layer of a lithium-ion rechargeable battery is made of a sintered body including first particles 110 and second particles 120, the first particles 110 each containing lithium phosphorus oxide (e.g., Li3PO4) as an inorganic solid electrolyte, the second particles 120 each containing lithium transition metal oxide (e.g., LiNiO2) as a positive electrode active material.
    Type: Application
    Filed: April 11, 2018
    Publication date: May 28, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Takaki YASUDA, Akira SAKAWAKI
  • Publication number: 20200083558
    Abstract: A lithium-ion rechargeable battery (1) includes a battery part (100) which performs charging and discharging using lithium ions, and a shell (30) for housing the battery part (100) in the interior thereof. The battery part (100) is configured by laminating: a first battery part (10) formed by laminating a first positive electrode layer (11), a first solid electrolyte layer (12), a first negative electrode layer (13) and a first negative electrode collector layer (14); and a second battery part (20) formed by laminating a second positive electrode layer (21), a second solid electrolyte layer (22), a second negative electrode layer (23) and a second negative electrode collector layer (24). In the shell (30), the first battery part (10) and the second battery part (20) are connected in series.
    Type: Application
    Filed: November 1, 2017
    Publication date: March 12, 2020
    Applicants: SHOWA DENKO K.K., SHOWA DENKO PACKAGING CO., LTD.
    Inventors: Akira SAKAWAKI, Takaki YASUDA, Koji MINAMITANI
  • Publication number: 20190386302
    Abstract: A lithium-ion rechargeable battery (1) composed of a positive electrode layer (20), a solid electrolyte layer (30), a negative electrode layer (40) and a negative electrode collector layer (50) that are stacked on a substrate (10). The positive electrode layer (20) is made of lithium manganate (Li2.5Mn2O4) having a lithium molar ratio higher than that of a stoichiometric composition.
    Type: Application
    Filed: December 1, 2017
    Publication date: December 19, 2019
    Applicant: Showa Denko K.K.
    Inventors: Takaki YASUDA, Akira SAKAWAKI, Tatsunori SHINO
  • Publication number: 20190296389
    Abstract: A lithium-ion rechargeable battery (1) includes: a battery unit (50) including a metal substrate (5); a first battery part (10) formed on a front surface of the substrate (5) and a second battery part (20) formed on a back surface thereof; and a shell (30) that houses the first battery part (10) and the second battery part (20) therein. In the shell (30), a first metal layer (313) and a second metal layer (323) are connected to a first negative electrode collector layer (14) of the first battery part (10) and a second negative electrode collector layer (24) of the second battery part (20), respectively. Further, by connecting the first metal layer (313) and the second metal layer (323), the first battery part (10) and the second battery part (20) are connected in parallel within the shell (30).
    Type: Application
    Filed: November 1, 2017
    Publication date: September 26, 2019
    Applicants: SHOWA DENKO K.K., SHOWA DENKO PACKGING CO., LTD.
    Inventors: Akira SAKAWAKI, Takaki YASUDA, Koji MINAMITANI
  • Publication number: 20190273225
    Abstract: A lithium-ion rechargeable battery 1 includes a battery part 10 which performs charging and discharging using lithium ions, and a shell 30 for housing the battery part 10 in the interior thereof. The shell 30 is constituted by thermally adhering a first laminated film 31 which includes a first metal layer 313 and a first thermo-adhesive resin layer 315, a second laminated film 32 which includes a second metal layer 323 and a second thermo-adhesive resin layer 325 by thermally adhering the first thermo-adhesive resin layer 315 and the second thermo-adhesive resin layer 325. Moreover, the positive electrode side of the battery part 10 is electrically connected to the first metal layer 313 of the first laminated film 31, and the negative electrode side of the battery part 10 is electrically connected to the second metal layer 323 of the second laminated film 32.
    Type: Application
    Filed: October 11, 2017
    Publication date: September 5, 2019
    Applicants: SHOWA DENKO K.K., SHOWA DENKO PACKAGING CO., LTD.
    Inventors: Akira SAKAWAKI, Takaki YASUDA, Koji MINAMITANI