Patents by Inventor Iwao Ohwada
Iwao Ohwada 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: 11387454Abstract: The present invention provides a secondary battery, including a positive electrode plate composed of an inorganic material including a positive electrode active material in an oxide form and having a thickness of 25 ?m or more; a negative electrode plate composed of an inorganic material including a negative electrode active material in an oxide form and having a thickness of 25 ?m or more; and an inorganic solid electrolyte layer, wherein the secondary battery is chargeable and dischargeable at a temperature of 100° C. or more. The present invention can provide rapid charge/discharge at a high cycle capacity retention and increase the capacity of the secondary battery.Type: GrantFiled: April 23, 2019Date of Patent: July 12, 2022Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Iwao Ohwada, Yukinobu Yura
-
Patent number: 11114595Abstract: The present invention relates to an optical component and a transparent body used in the optical component. The optical component includes at least one optical element that radiates ultraviolet light, and a package that accommodates the optical element. The package includes a mounting substrate on which the optical element is mounted, and a transparent body that is bonded to the mounting substrate with an organic-based adhesive layer therebetween. The package has a structure in which the ultraviolet light is transmitted through the transparent body but not guided to the adhesive layer, and the ultraviolet light does not directly come into contact with the adhesive layer.Type: GrantFiled: October 3, 2019Date of Patent: September 7, 2021Assignee: NGK Insulators, Ltd.Inventors: Makoto Iwai, Iwao Ohwada, Yoshio Kikuchi
-
Patent number: 11112086Abstract: A phosphor device includes a phosphor layer composed of a phosphor glass or phosphor single crystal, a reflective film provided on the phosphor layer, a warping suppression layer provided on the reflective film, and a supporting body bonded to the warping suppression layer by direct bonding. An excitation light incident into the phosphor layer is converted to fluorescence, and the fluorescence and excitation light are reflected by the reflective film and emitted from the phosphor layer.Type: GrantFiled: December 12, 2018Date of Patent: September 7, 2021Assignee: NGK INSULATORS, LTD.Inventors: Naotake Okada, Iwao Ohwada, Shoichiro Yamaguchi, Keiichiro Asai, Jungo Kondo
-
Patent number: 11105486Abstract: An optic converts wavelength of light from a light source. The optic includes a first substrate and a second substrate. The first substrate includes a fluorescent material substrate. The second substrate supports the first substrate. The second substrate includes a translucent substrate to receive the light from the light source through the first substrate. The translucent substrate has an oriented polycrystalline structure to have a crystalline anisotropy in refractive index.Type: GrantFiled: August 3, 2020Date of Patent: August 31, 2021Assignee: NGK INSULATORS, LTD.Inventors: Iwao Ohwada, Jungo Kondo, Yoshimasa Kobayashi
-
Publication number: 20210217938Abstract: The present invention relates to a transparent sealing member and an optical component. The present invention is a transparent sealing member (10A) used in an optical component (100A) provided with a package (16A) having at least one optical element (14) emitting ultraviolet light (12) and a mount board (18) to which the optical element is mounted. The transparent sealing member (10A) is provided with a transparent body (24) joined on the mount board (18) via an organic adhesion layer (20), and the transparent body (24) has a housing space (26) in a lower surface opening.Type: ApplicationFiled: March 29, 2021Publication date: July 15, 2021Applicant: NGK INSULATORS, LTD.Inventors: Iwao OHWADA, Yoshio KIKUCHI
-
Patent number: 11014855Abstract: In a first step of a method for producing a transparent AlN sintered body, first, a formed body is prepared by forming a mixture obtained by mixing a sintering aid with an AlN raw-material powder containing a plate-like AlN powder whose plate surface is a c-plane and which has an aspect ratio of 3 or more. At this time, the mixture is formed such that the plate surface of the plate-like AlN powder is disposed along a surface of the formed body. In a second step, an oriented AlN sintered body is obtained by subjecting the formed body to hot-press sintering in a non-oxidizing atmosphere while applying a pressure to the surface of the formed body. In a third step, a transparent AlN sintered body is obtained by sintering the oriented AlN sintered body at normal pressure in a non-oxidizing atmosphere to remove a component derived from the sintering aid.Type: GrantFiled: May 22, 2019Date of Patent: May 25, 2021Assignee: NGK Insulators, Ltd.Inventors: Yoshimasa Kobayashi, Hiroharu Kobayashi, Kazuki Iida, Iwao Ohwada
-
Patent number: 10995934Abstract: An optical component includes a first substrate including a phosphor substrate and a second substrate including a translucent substrate and supporting the first substrate. The translucent substrate has a polycrystalline structure with orientation.Type: GrantFiled: July 1, 2019Date of Patent: May 4, 2021Assignee: NGK Insulators, Ltd.Inventors: Naotake Okada, Jungo Kondo, Shoichiro Yamaguchi, Iwao Ohwada
-
Patent number: 10950858Abstract: Various useful IC-related applications are provided using all solid lithium secondary batteries. For example, there is provided a power source for integrated circuit (IC) that includes an all-solid-state lithium secondary battery including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer, wherein the all-solid-state lithium secondary battery itself has a function as a bypass capacitor, thereby being capable of supplying a temporarily increased peak current in addition to a steady current.Type: GrantFiled: April 23, 2019Date of Patent: March 16, 2021Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Iwao Ohwada
-
Publication number: 20200363037Abstract: An optic converts wavelength of light from a light source. The optic includes a first substrate and a second substrate. The first substrate includes a fluorescent material substrate. The second substrate supports the first substrate. The second substrate includes a translucent substrate to receive the light from the light source through the first substrate. The translucent substrate has an oriented polycrystalline structure to have a crystalline anisotropy in refractive index.Type: ApplicationFiled: August 3, 2020Publication date: November 19, 2020Inventors: Iwao Ohwada, Jungo Kondo, Yoshimasa Kobayashi
-
Patent number: 10581114Abstract: Provided is a battery-equipped device including a substrate, a device disposed on the substrate, an all-solid-state battery disposed such that the planar shape conforms to the periphery of the device on the substrate and at least partially having a complementary outer edge shape that conforms to the entire or a part of the outer edge shape of the device, and interconnections connecting the device and the all-solid-state battery. The all-solid-state battery includes a positive electrode layer containing an oriented polycrystalline positive-electrode active material composed of lithium transition metal oxide particles oriented in a certain direction, a solid electrolyte layer composed of a lithium-ion conductive material, and a negative electrode layer containing a negative-electrode active material. The present invention can provide a battery-equipped device that can significantly increase the degree of freedom of design and can output necessary electric power in a minimum space.Type: GrantFiled: April 26, 2017Date of Patent: March 3, 2020Assignee: NGK Insulators, Ltd.Inventors: Iwao Ohwada, Toshihiro Yoshida, Kenshin Kitoh
-
Publication number: 20190270676Abstract: In a first step of a method for producing a transparent AlN sintered body, first, a formed body is prepared by forming a mixture obtained by mixing a sintering aid with an AlN raw-material powder containing a plate-like AlN powder whose plate surface is a c-plane and which has an aspect ratio of 3 or more. At this time, the mixture is formed such that the plate surface of the plate-like AlN powder is disposed along a surface of the formed body. In a second step, an oriented AlN sintered body is obtained by subjecting the formed body to hot-press sintering in a non-oxidizing atmosphere while applying a pressure to the surface of the formed body. In a third step, a transparent AlN sintered body is obtained by sintering the oriented AlN sintered body at normal pressure in a non-oxidizing atmosphere to remove a component derived from the sintering aid.Type: ApplicationFiled: May 22, 2019Publication date: September 5, 2019Applicant: NGK INSULATORS, LTD.Inventors: Yoshimasa KOBAYASHI, Hiroharu Kobayashi, Kazuki IIDA, Iwao Ohwada
-
Publication number: 20190252682Abstract: The present invention provides a secondary battery, including a positive electrode plate composed of an inorganic material including a positive electrode active material in an oxide form and having a thickness of 25 ?m or more; a negative electrode plate composed of an inorganic material including a negative electrode active material in an oxide form and having a thickness of 25 ?m or more; and an inorganic solid electrolyte layer, wherein the secondary battery is chargeable and dischargeable at a temperature of 100° C. or more. The present invention can provide rapid charge/discharge at a high cycle capacity retention and increase the capacity of the secondary battery.Type: ApplicationFiled: April 23, 2019Publication date: August 15, 2019Applicant: NGK INSULATORS, LTD.Inventors: Yukihisa TAKEUCHI, Iwao Ohwada, Yukinobu Yura
-
Publication number: 20190120442Abstract: A phosphor device includes a phosphor layer composed of a phosphor glass or phosphor single crystal, a reflective film provided on the phosphor layer, a warping suppression layer provided on the reflective film, and a supporting body bonded to the warping suppression layer by direct bonding. Excitation light incident into the phosphor layer is converted to fluorescence, and the fluorescence and excitation light are reflected by the reflective film and emitted from the phosphor layer.Type: ApplicationFiled: December 12, 2018Publication date: April 25, 2019Inventors: Naotake OKADA, Iwao OHWADA, Shoichiro YAMAGUCHI, Keiichiro ASAI, Jungo KONDO
-
Publication number: 20170229733Abstract: Provided is a battery-equipped device including a substrate, a device disposed on the substrate, an all-solid-state battery disposed such that the planar shape conforms to the periphery of the device on the substrate and at least partially having a complementary outer edge shape that conforms to the entire or a part of the outer edge shape of the device, and interconnections connecting the device and the all-solid-state battery. The all-solid-state battery includes a positive electrode layer containing an oriented polycrystalline positive-electrode active material composed of lithium transition metal oxide particles oriented in a certain direction, a solid electrolyte layer composed of a lithium-ion conductive material, and a negative electrode layer containing a negative-electrode active material. The present invention can provide a battery-equipped device that can significantly increase the degree of freedom of design and can output necessary electric power in a minimum space.Type: ApplicationFiled: April 26, 2017Publication date: August 10, 2017Applicant: NGK INSULATORS, LTD.Inventors: Iwao OHWADA, Toshihiro YOSHIDA, Kenshin KITOH
-
Patent number: 9685680Abstract: Disclosed is use of an all-solid-state battery as a backup power source in at least one device selected from the group consisting of a computer, a laptop computer, a portable computer, a pocket computer, a workstation, a supercomputer, computer-peripheral hardware, and a server. This all-solid-state battery comprises a positive electrode layer comprising a positive-electrode active material that is an oriented polycrystalline body composed of lithium transition metal oxide grains oriented in a given direction; a solid electrolyte layer composed of a lithium-ion conductive material; and a negative electrode layer comprising a negative-electrode active material.Type: GrantFiled: May 18, 2016Date of Patent: June 20, 2017Assignee: NGK Insulators, Ltd.Inventors: Kazuyuki Mizuno, Toshihiro Yoshida, Kenshin Kitoh, Iwao Ohwada
-
Publication number: 20160268639Abstract: Disclosed is use of an all-solid-state battery as a backup power source in at least one device selected from the group consisting of a computer, a laptop computer, a portable computer, a pocket computer, a workstation, a supercomputer, computer-peripheral hardware, and a server. This all-solid-state battery comprises a positive electrode layer comprising a positive-electrode active material that is an oriented polycrystalline body composed of lithium transition metal oxide grains oriented in a given direction; a solid electrolyte layer composed of a lithium-ion conductive material; and a negative electrode layer comprising a negative-electrode active material.Type: ApplicationFiled: May 18, 2016Publication date: September 15, 2016Applicant: NGK INSULATORS, LTD.Inventors: Kazuyuki MIZUNO, Toshihiro YOSHIDA, Kenshin KITOH, Iwao OHWADA
-
Patent number: 9431067Abstract: The present invention provides a volatile memory backup system including an all-solid-state battery. The backup system includes a volatile memory, a nonvolatile memory connected to the volatile memory so as to transfer data therebetween, an all-solid-state battery connected to the volatile memory and the nonvolatile memory, the battery continuously or intermittently supplying a current to the volatile memory during a power failure to retain data in the volatile memory, and a controller connected in parallel with the battery, the controller intermittently supplying a peak current to the volatile memory during the power failure and intermittently transferring divided volumes of data in the volatile memory to the nonvolatile memory by the peak current and a current from the battery temporarily increased in association with the peak current to store the data in the nonvolatile memory, thereby gradually accumulating the data in the volatile memory into the nonvolatile memory.Type: GrantFiled: October 23, 2015Date of Patent: August 30, 2016Assignee: NGK Insulators, Ltd.Inventors: Iwao Ohwada, Kenshin Kitoh
-
Publication number: 20160071552Abstract: The present invention provides a volatile memory backup system including an all-solid-state battery. The backup system includes a volatile memory, a nonvolatile memory connected to the volatile memory so as to transfer data therebetween, an all-solid-state battery connected to the volatile memory and the nonvolatile memory, the battery continuously or intermittently supplying a current to the volatile memory during a power failure to retain data in the volatile memory, and a controller connected in parallel with the battery, the controller intermittently supplying a peak current to the volatile memory during the power failure and intermittently transferring divided volumes of data in the volatile memory to the nonvolatile memory by the peak current and a current from the battery temporarily increased in association with the peak current to store the data in the nonvolatile memory, thereby gradually accumulating the data in the volatile memory into the nonvolatile memory.Type: ApplicationFiled: October 23, 2015Publication date: March 10, 2016Inventors: Iwao OHWADA, Kenshin KITOH
-
Patent number: 7719201Abstract: A microdevice has an electron emitter including a memory for accumulating electric charges corresponding to an input voltage, for emitting electrons corresponding to the electric charges accumulated in said memory; and an amplifier connected to a power supply and including a collector electrode for capturing the electrons emitted from the electron emitter. The atmosphere between at least the electron emitter and the collector electrode is a vacuum. When the electrons emitted from the electron emitter are captured by the collector electrode of the amplifier, a collector current flows between the collector electrode and the electron emitter to amplify the input voltage.Type: GrantFiled: September 28, 2004Date of Patent: May 18, 2010Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Iwao Ohwada
-
Patent number: 7713366Abstract: A piezoelectric/electrostrictive film is formed on a solid-phase support, the piezoelectric/electrostrictive film including an incompletely bonded region which is incompletely bonded in a predetermined pattern to the solid-phase support, and a bonded region which is bonded to the surface of the solid-phase support so that the incompletely bonded region can be separated. The piezoelectric/electrostrictive film is bonded to a substrate and is separated from the solid-phase support in the bonded region. As a result, the incompletely bonded region is transferred to the substrate. The transferred incompletely bonded region is used as a piezoelectric/electrostrictive film for manufacturing a piezoelectric/electrostrictive film device.Type: GrantFiled: October 24, 2006Date of Patent: May 11, 2010Assignee: NGK Insulators, Ltd.Inventors: Iwao Ohwada, Nobuyuki Kobayashi