Patents by Inventor Kozo Okamoto

Kozo Okamoto 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: 10796917
    Abstract: A semiconductor device includes: a first semiconductor layer formed, on a substrate, of a nitride semiconductor; a second semiconductor layer formed, on the first semiconductor layer, of a nitride semiconductor; a source electrode formed on the second semiconductor layer; a drain electrode formed on the second semiconductor layer; a metal oxide film formed, between the source electrode and the drain electrode, on the second semiconductor layer; and a gate electrode formed on the metal oxide film. The metal oxide film includes AlOx and InOx. AlOx/InOx in the metal oxide film is greater than or equal to 3.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: October 6, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Shirou Ozaki, Kozo Makiyama, Naoya Okamoto
  • Publication number: 20200058783
    Abstract: A compound semiconductor device includes a compound semiconductor laminate structure including an electron transit layer and an electron supply layer, a gate electrode, a source electrode, and a drain electrode that are formed over the electron supply layer, a first insulating layer of diamond formed between the gate electrode and the drain electrode over the compound semiconductor laminate structure, and a second insulating layer formed between the gate electrode and the source electrode over the compound semiconductor laminate structure, wherein a positive compressive stress is applied from the first insulating layer to the electron supply layer, and a compressive stress from the second insulating layer to the electron supply layer is smaller than the compressive stress from the first insulating layer to the electron supply layer.
    Type: Application
    Filed: August 2, 2019
    Publication date: February 20, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Shirou OZAKI, Kozo Makiyama, Yuichi Minoura, Yusuke Kumazaki, Toshihiro Ohki, NAOYA OKAMOTO
  • Publication number: 20200018418
    Abstract: The present invention controls the pressure and flow rate of fluid, in order to obtain uniform performance, configure a closed loop magnetic circuit so as to include an electromagnet, a flapper, and a yoke material, and elastically deform the flapper itself by Maxwell attractive force generated between a magnetic pole of the electromagnet and the flapper to make the separation distance between the nozzle and the flapper variable. As opposed to a rigid flapper structure that swingably moves around a supporting point, like a conventional servo valve, the electromagnet, the magnetic pole, the nozzle, the flapper, and the like are arranged such that a change in magnetic gap directly leads to a change in air gap.
    Type: Application
    Filed: September 25, 2019
    Publication date: January 16, 2020
    Inventors: Teruo Maruyama, Kozo Okamoto, Takumi Okada, Satoki Yamaguchi, Masataka Nakashima
  • Patent number: 10465816
    Abstract: The present invention controls the pressure and flow rate of fluid, in order to obtain uniform performance, configure a closed loop magnetic circuit so as to include an electromagnet, a flapper, and a yoke material, and elastically deform the flapper itself by Maxwell attractive force generated between a magnetic pole of the electromagnet and the flapper to make the separation distance between the nozzle and the flapper variable. As opposed to a rigid flapper structure that swingably moves around a supporting point, like a conventional servo valve, the electromagnet, the magnetic pole, the nozzle, the flapper, and the like are arranged such that a change in magnetic gap directly leads to a change in air gap.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: November 5, 2019
    Assignee: TOKKYOKIKI CORPORATION
    Inventors: Teruo Maruyama, Kozo Okamoto, Takumi Okada, Satoki Yamaguchi, Masataka Nakashima
  • Publication number: 20190244821
    Abstract: A semiconductor device includes: a first semiconductor layer formed, on a substrate, of a nitride semiconductor; a second semiconductor layer formed, on the first semiconductor layer, of a nitride semiconductor; a source electrode formed on the second semiconductor layer; a drain electrode formed on the second semiconductor layer; a metal oxide film formed, between the source electrode and the drain electrode, on the second semiconductor layer; and a gate electrode formed on the metal oxide film. The metal oxide film includes AlOx and InOx. AlOx/InOx in the metal oxide film is greater than or equal to 3.
    Type: Application
    Filed: April 16, 2019
    Publication date: August 8, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Shirou OZAKI, Kozo Makiyama, NAOYA OKAMOTO
  • Patent number: 10312094
    Abstract: A semiconductor device includes: a first semiconductor layer formed, on a substrate, of a nitride semiconductor; a second semiconductor layer formed, on the first semiconductor layer, of a nitride semiconductor; a source electrode formed on the second semiconductor layer; a drain electrode formed on the second semiconductor layer; a metal oxide film formed, between the source electrode and the drain electrode, on the second semiconductor layer; and a gate electrode formed on the metal oxide film. The metal oxide film includes AlOx and InOx. AlOx/InOx in the metal oxide film is greater than or equal to 3.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: June 4, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Shirou Ozaki, Kozo Makiyama, Naoya Okamoto
  • Patent number: 10194491
    Abstract: The present disclosure, for the prevention of a possible degradation of an induction coil in insulating performance by preventing condensate formation on an induction coil, provides a device that is configured to include a roller main body, an induction heat generator provided in the roller main body and having the induction coil for heating the roller main body inductively, a cooling mechanism configured to introduce a coolant mist into a clearance portion between the roller main body and the induction heat generator for cooling the roller main body, an AC voltage application part configured to apply AC voltage to the induction coil, and a DC voltage application part configured to apply DC voltage to the induction coil.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: January 29, 2019
    Assignee: TOKUDEN CO., LTD.
    Inventors: Kozo Okamoto, Takatsugu Kitano
  • Patent number: 9595768
    Abstract: A glazing is disclosed comprising at least one ply of glass having an electrically conductive component on at least one surface, and an electrical connector electrically connected to the electrically conductive component through a soldered joint, the solder of the joint having a composition comprising 0.5 wt % or more indium, wherein the electrical connector comprises a nickel plated contact for contacting the solder. Also disclosed are solders having a composition comprising 14 to 75 wt % In, 14 to 75 wt % Sn, to 5 wt % Ag, to 5 wt % Ni, and less than 0.1 wt % Pb. Also disclosed is use of a solder having a composition comprising 0.5 wt % or more indium to solder a nickel plated electrical connector to an electrically conductive component on the surface of a ply of glass. The aspects of the invention improve the durability of electrical connections on glazing.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: March 14, 2017
    Assignees: Pilkington Group Limited, Nippon Sheet Glass Co. Ltd., Nishinihon Shoko Co., Ltd.
    Inventors: Michael Lyon, Naotaka Ikawa, Kazuo Inada, Mamoru Yoshida, Takashi Muromachi, Kazuhisa Ono, Kozo Okamoto, Takashi Suzuki
  • Publication number: 20160228889
    Abstract: The present invention controls the pressure and flow rate of fluid, in order to obtain uniform performance, configure a closed loop magnetic circuit so as to include an electromagnet, a flapper, and a yoke material, and elastically deform the flapper itself by Maxwell attractive force generated between a magnetic pole of the electromagnet and the flapper to make the separation distance between the nozzle and the flapper variable. As opposed to a rigid flapper structure that swingably moves around a supporting point, like a conventional servo valve, the electromagnet, the magnetic pole, the nozzle, the flapper, and the like are arranged such that a change in magnetic gap directly leads to a change in air gap.
    Type: Application
    Filed: February 9, 2016
    Publication date: August 11, 2016
    Inventors: Teruo Maruyama, Kozo Okamoto, Takumi Okada, Satoki Yamaguchi, Masataka Nakashima
  • Publication number: 20160021706
    Abstract: The present disclosure, for the prevention of a possible degradation of an induction coil in insulating performance by preventing condensate formation on an induction coil, provides a device that is configured to include a roller main body, an induction heat generator provided in the roller main body and having the induction coil for heating the roller main body inductively, a cooling mechanism configured to introduce a coolant mist into a clearance portion between the roller main body and the induction heat generator for cooling the roller main body, an AC voltage application part configured to apply AC voltage to the induction coil, and a DC voltage application part configured to apply DC voltage to the induction coil.
    Type: Application
    Filed: July 16, 2015
    Publication date: January 21, 2016
    Inventors: Kozo Okamoto, Takatsugu Kitano
  • Patent number: 8833511
    Abstract: In a conventional hard material insulator, reproduced sound can be tuned with use of characteristics of the material; however, various types of acoustic materials have specific high frequency characteristics, and thus their acoustic effects lack versatility, require compatible audio devices, and change with environment, musical genre, etc. To address this, a wind-bell member (resonant member) is arranged in parallel with a main propagation path of vibration transferred from an audio device to an insulator. Accordingly, a vibration system of a wind-bell having a tone determined by many factors such as a fundamental tone, harmonic tones, lingering sound, and fluctuation assists (enhances) high frequency vibration propagated from the audio device. As a result, due to the above assist action that is different in principle from a conventional type, acoustic characteristics such as a sense of localization, resolution, and a sense of transparency and scale a sound image can be dramatically improved.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: September 16, 2014
    Assignee: Tokkyokiki Corporation
    Inventors: Teruo Maruyama, Kozo Okamoto, Satoki Yamaguchi, Akio Tajima
  • Publication number: 20140138155
    Abstract: A glazing is disclosed comprising at least one ply of glass having an electrically conductive component on at least one surface, and an electrical connector electrically connected to the electrically conductive component through a soldered joint, the solder of the joint having a composition comprising 0.5 wt % or more indium, wherein the electrical connector comprises a nickel plated contact for contacting the solder. Also disclosed are solders having a composition comprising 14 to 75 wt % In, 14 to 75 wt % Sn, to 5 wt % Ag, to 5 wt % Ni, and less than 0.1 wt % Pb. Also disclosed is use of a solder having a composition comprising 0.5 wt % or more indium to solder a nickel plated electrical connector to an electrically conductive component on the surface of a ply of glass. The aspects of the invention improve the durability of electrical connections on glazing.
    Type: Application
    Filed: May 2, 2012
    Publication date: May 22, 2014
    Applicants: PILKINGTON GROUP LIMITED, NIPPON SHEET GLASS CO., LTD., UCHIHASHI ESTEC CO., LTD., NISHINIHON SHOKO CO., LTD
    Inventors: Michael Lyon, Naotaka Ikawa, Kazuo Inada, Mamoru Yoshida, Takashi Muromachi, Kazuhisa Ono, Kozo Okamoto, Takashi Suzuki
  • Publication number: 20130206499
    Abstract: In a conventional hard material insulator, reproduced sound can be tuned with use of characteristics of the material; however, various types of acoustic materials have specific high frequency characteristics, and thus their acoustic effects lack versatility, require compatible audio devices, and change with environment, musical genre, etc. To address this, a wind-bell member (resonant member) is arranged in parallel with a main propagation path of vibration transferred from an audio device to an insulator. Accordingly, a vibration system of a wind-bell having a tone determined by many factors such as a fundamental tone, harmonic tones, lingering sound, and fluctuation assists (enhances) high frequency vibration propagated from the audio device. As a result, due to the above assist action that is different in principle from a conventional type, acoustic characteristics such as a sense of localization, resolution, and a sense of transparency and scale a sound image can be dramatically improved.
    Type: Application
    Filed: July 29, 2011
    Publication date: August 15, 2013
    Applicant: TOKKYOKIKI CORPORATION
    Inventors: Teruo Maruyama, Kozo Okamoto, Satoki Yamaguchi, Akio Tajima
  • Patent number: 7533308
    Abstract: The semiconductor test system comprises a test device for testing semiconductor devices including redundant circuits to obtain fail information of defective parts of the semiconductor devices; a redundant remedy judging device which includes fail memories for storing the fail information, and a redundant remedy judging unit for judging based on the fail information stored in the fail memories as to whether or not the redundant remedy replacing the defective parts of the semiconductor devices with the redundant circuits can be made, and which is provided independent of the test device, wherein the test device and the redundant remedy judging device are interconnected with each other via a network, and fail information is transmitted from the test device to the redundant remedy judging device.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: May 12, 2009
    Assignee: Fujitsu Microelectronics Limited
    Inventors: Tomomi Yano, Kozo Okamoto, Takumi Morimoto
  • Patent number: 7420141
    Abstract: A thermal processing roller includes a heat transfer medium flowing path therein and heats a member to be processed abutting against a surface of the roller or absorbs heat therefrom by heat transfer fluid flowing through the heat transfer medium flowing path, wherein a sealed chamber extending in a longitudinal direction of the roller and in which heat transfer medium of vapor-liquid two phases is sealed is formed within a thick portion of the roller.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: September 2, 2008
    Assignee: Tokuden Co., Ltd.
    Inventors: Yoshio Kitano, Toru Tonomura, Kozo Okamoto, Shigeyuki Hirota, Masanobu Heguri, Toshiki Hanafusa
  • Publication number: 20070138162
    Abstract: In a heating fluid medium passing roller device for heat-treating a object to be processed in contact with the surface of a roller 1, heat exchanger devices 5a, 5b are arranged on a circulating heating fluid medium path, and the heating fluid medium heat-exchanged in the heat exchanger device is passed through the roller 1 having a jacked chamber 1b sealed with a gas-liquid two phase heating medium within its wall to keep the roller 1 at a predetermined temperature. Further, the heating fluid medium passing roller device includes a temperature sensor 13 for detecting the temperature of the heating fluid medium to be supplied into the roller 1 and a temperature sensor 14 for detecting the temperature of the heating fluid medium exhausted from the roller 1. The flow rate of the heating fluid medium to be supplied into the roller is adjusted so that the difference between the temperatures detected by the temperature sensors 13 and 14 is constant.
    Type: Application
    Filed: November 1, 2006
    Publication date: June 21, 2007
    Inventors: Toru Tonomura, Kozo Okamoto, Yasuhiro Fujimoto, Motomasa Hirao
  • Publication number: 20060289483
    Abstract: An inductive heating roller device, in which support rods fixed in an inductive heating mechanism are inserted into the drive shafts of a roller and are supported on the inner faces of the drive shafts through bearings so that the inductive heating mechanism is held in a floating manner. Elastic members 14 are arranged between the outer faces of the support rods 7A and 7B and the inner faces of the drive shafts 3A and 3B so that the support rods 7A and 7B are supported on the inner faces of the drive shafts 3A and 3B through the elastic members 14 and the bearings 10A and 10B.
    Type: Application
    Filed: June 8, 2006
    Publication date: December 28, 2006
    Inventors: Yoshio Kitano, Kozo Okamoto, Yoshihiko Yamamura
  • Publication number: 20060236172
    Abstract: On a semiconductor wafer 10, semiconductor chip regions 12 including a semiconductor integrated circuit, a scribe line 14 formed adjacent to the semiconductor chip region 12, a test device 18 formed in the scribe line 14, electrically separated from the semiconductor circuit in the semiconductor chip region 12, for controlling a tester signal in testing the semiconductor integrated circuit are provided, and the semiconductor integrated circuit of the semiconductor chip region 12 and the test device 18 are electrically connected to each other through lines 38L, 38R provided in a probe card 16.
    Type: Application
    Filed: August 30, 2005
    Publication date: October 19, 2006
    Applicant: FUJITSU LIMITED
    Inventor: Kozo Okamoto
  • Publication number: 20060083084
    Abstract: The semiconductor test system comprises a test device 10 for testing semiconductor devices including redundant circuits to obtain fail information of defective parts of the semiconductor devices; a redundant remedy judging device 14 which includes fail memories 36a-36d for storing the fail information, and a redundant remedy judging unit 40 for judging based on the fail information stored in the fail memories 36a-36d as to whether or not the redundant remedy for replacing the defective parts of the semiconductor devices with the redundant circuits can be made, and which is provided independent of the test device 10, wherein the test device 10 and the redundant remedy judging device 14 are interconnected with each other via a network 12, and fail information is transmitted from the test device 10 to the redundant remedy judging device 14.
    Type: Application
    Filed: March 17, 2005
    Publication date: April 20, 2006
    Applicant: FUJITSU LIMITED
    Inventors: Tomomi Yano, Kozo Okamoto, Takumi Morimoto
  • Patent number: 6992272
    Abstract: A thermal processing roller includes a heat transfer medium flowing path therein and heats a member to be processed abutting against a surface of the roller or absorbs heat therefrom by heat transfer fluid flowing through the heat transfer medium flowing path, wherein a sealed chamber extending in a longitudinal direction of the roller and in which heat transfer medium of vapor-liquid two phases is sealed is formed within a thick portion of the roller.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: January 31, 2006
    Assignee: Tokuden Co., Ltd.
    Inventors: Yoshio Kitano, Toru Tonomura, Kozo Okamoto, Shigeyuki Hirota, Masanobu Heguri, Toshiki Hanafusa