Patents by Inventor Naoki Kosaka

Naoki Kosaka 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).

  • Publication number: 20250053891
    Abstract: A predetermined learning model is learned using an index value for a selected solution, which is a Pareto solution selected by a user among Pareto solutions based on a predetermined index, obtained from past input data including a combination of a delivery route and an additional delivery order, as training data, current input data including the combination is input to the learned predetermined learning model, a prediction index weight vector for each index of the Pareto solution is calculated, a Pareto solution in which a degree of similarity with the prediction index weight vector satisfies a predetermined condition is specified among the Pareto solutions, and the specified Pareto solution is output.
    Type: Application
    Filed: June 17, 2024
    Publication date: February 13, 2025
    Inventors: Toru FUJIHIRA, Tadayoshi KOSAKA, Naoki FURUYA, Manabu HASEGAWA, Kazuya UYAMA
  • Publication number: 20250033724
    Abstract: An operating device of a human-powered vehicle comprises a base structure, a first operating member, a second operating member, a first electric switch, and a second electric switch. The base structure is mountable to the human-powered vehicle. The first operating member is pivotally coupled to the base structure about a first pivot axis. The second operating member is pivotally coupled to the base structure about a second pivot axis. The first operating member and the second operating member are arranged in a first direction. The first electric switch is at least partially provided between the first operating member and the base structure. The second electric switch is at least partially provided between the second operating member and the base structure. At least one of the first pivot axis and the second pivot axis extends along the first direction.
    Type: Application
    Filed: May 27, 2024
    Publication date: January 30, 2025
    Applicant: SHIMANO INC.
    Inventors: Naoki CHIYA, Kosuke KITAHARA, Kentaro KOSAKA, Yoshimitsu MIKI
  • Patent number: 11973312
    Abstract: A semiconductor laser device comprises a stem serving as a base; a laser diode LD submount having surface electrodes arranged thereon and joined to the surface of the stem; an LD chip joined to the surface electrode and connected with the surface electrode; and leads fixed in through holes formed in the stem by means of sealing parts and electrically connected to the surface electrodes via embedded layers in via holes formed in the LD submount, wherein grooves are formed in portions of the sealing parts or in portions of the LD submount around the connections between the leads and the embedded layers, to obtain a good modulated light waveform.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: April 30, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoki Kosaka, Ayumi Fuchida, Masaaki Shimada, Go Sakaino, Tadashi Takase
  • Publication number: 20240006839
    Abstract: A semiconductor device according to the present disclosure includes a base body having a first face and a second face, a lead passing through a through hole penetrating the base body and extending to a side of the first face, a sealing body filling the through hole, a dielectric substrate having a first main surface and a second main surface erected with respect to the first face, a semiconductor laser provided on a side of the first main surface of the dielectric substrate, a signal line provided on the first main surface and electrically connected to the semiconductor laser, a connecting member electrically connecting the signal line and the lead to each other, and a rear surface conductor provided on the second main surface, wherein the sealing body is provided directly below the rear surface conductor as viewed from a direction perpendicular to the first face.
    Type: Application
    Filed: January 28, 2021
    Publication date: January 4, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akio SHIRASAKI, Naoki KOSAKA, Masaaki SHIMADA, Tadayoshi HATA, Nao HIROSHIGE
  • Publication number: 20230298948
    Abstract: A temperature measurement method according to one embodiment includes a step of applying measurement light having a predetermined wavelength to a reflective film formed on a first surface of a substrate. Furthermore, the temperature measurement method includes a step of receiving, with an optical member, reflected light generated by the measurement light being reflected by the reflective film. Furthermore, the temperature measurement method includes a step of calculating the temperature of the substrate based on a reflectance based on the ratio between the intensity of the measurement light and the intensity of the reflected light.
    Type: Application
    Filed: September 8, 2022
    Publication date: September 21, 2023
    Applicant: Kioxia Corporation
    Inventor: Naoki KOSAKA
  • Publication number: 20230011072
    Abstract: Provided are a lens, a stem, an LD chip to emit laser light with a beam center directed along a mounting surface of the stem, and a PD chip having a reflective surface formed with a dielectric multilayer film on its surface, reflecting the laser light emitted from the LD chip toward the lens, and measuring an amount of the laser light, wherein the LD chip is provided with a waveguide portion having a tip portion that is formed on a side of a front end face and has a width of 0.5 to 0.7 ?m, and having a tapered portion that is connected to the tip portion and becomes narrower toward the tip portion at a gradient of 0.018 to 0.033.
    Type: Application
    Filed: February 28, 2020
    Publication date: January 12, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Ryosuke MIYAGOSHI, Naoki NAKAMURA, Naoki KOSAKA, Kosuke SHINOHARA
  • Publication number: 20220285905
    Abstract: A semiconductor laser device disclosed in this application is characterized; wherein one of the reflective surface and the secondary reflective surface is constituted by a dielectric multi-layer film that is formed on a PD chip for measuring a light quantity of the laser light; and wherein an inclination angle of the reflective surface is set to a value obtained by subtraction of a value that is less than an inclination angle of beam center, from 45 degrees, while an inclination angle of the secondary reflective surface is set to a value obtained by subtraction of a value that is more than the inclination angle of beam center, from 45 degrees.
    Type: Application
    Filed: November 28, 2019
    Publication date: September 8, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Naoki KOSAKA, Ayumi FUCHIDA, Naoki NAKAMURA
  • Publication number: 20220224071
    Abstract: A semiconductor laser device comprises a stem serving as a base; a laser diode LD submount having surface electrodes arranged thereon and joined to the surface of the stem; an LD chip joined to the surface electrode and connected with the surface electrode; and leads fixed in through holes formed in the stem by means of sealing parts and electrically connected to the surface electrodes via embedded layers in via holes formed in the LD submount, wherein grooves are formed in portions of the sealing parts or in portions of the LD submount around the connections between the leads and the embedded layers, to obtain a good modulated light waveform.
    Type: Application
    Filed: July 2, 2019
    Publication date: July 14, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Naoki KOSAKA, Ayumi FUCHIDA, Masaaki SHIMADA, Go SAKAINO, Tadashi TAKASE
  • Publication number: 20220166185
    Abstract: A semiconductor laser device comprises a semiconductor laser element, a photodetector to receive laser light emitted from the semiconductor laser element, and a stem on which the semiconductor laser element and the photodetector are mounted. The semiconductor laser element is disposed on a side to a stem front face between the stem front face and a farthest portion of the photodetector farthest away from the stem front face of the stem on which the semiconductor laser element and the photodetector are mounted. The photodetector has a light receiving face for receiving the laser light and a reflective film formed thereon in which part of the laser light is transmitted and the rest is reflected, the light receiving face being formed on a side facing the semiconductor laser element.
    Type: Application
    Filed: August 6, 2019
    Publication date: May 26, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Ryosuke MIYAGOSHI, Naoki NAKAMURA, Naoki KOSAKA
  • Patent number: 9806039
    Abstract: In the present invention, in addition to arranging a plurality of amplifying elements in a staggered manner, signal path lengths from an input-side divider to gate pads of the plurality of amplifying elements are equalized, and signal path lengths from drain pads of the plurality of amplifying elements to an output-side combiner are equalized.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: October 31, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoki Kosaka, Hiroaki Maehara, Ko Kanaya, Miyo Miyashita, Kazuya Yamamoto
  • Patent number: 9800210
    Abstract: A power amplifier includes: a plurality of FET cells connected in parallel to each other; a plurality of first resistors connected between gate terminals of the plurality of FET cells and grounding terminals respectively; a plurality of second resistors having one ends connected to the gate terminals of the plurality of FET cells respectively and other ends connected to each other; a plurality of capacitors connected in parallel to the plurality of second resistors respectively; and a third resistor connected between a connection point of the other ends of the plurality of second resistors and a power supply terminal, wherein the first resistors have temperature coefficients of resistance greater than those of the second and third resistors and are arranged closer to the corresponding FET cells than the third resistor.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: October 24, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Katsuya Kato, Naoki Kosaka, Eri Fukuda, Shigeru Fujiwara, Atsushi Okamura, Kenichiro Chomei
  • Publication number: 20170207753
    Abstract: A power amplifier includes: a plurality of FET cells connected in parallel to each other; a plurality of first resistors connected between gate terminals of the plurality of FET cells and grounding terminals respectively; a plurality of second resistors having one ends connected to the gate terminals of the plurality of FET cells respectively and other ends connected to each other; a plurality of capacitors connected in parallel to the plurality of second resistors respectively; and a third resistor connected between a connection point of the other ends of the plurality of second resistors and a power supply terminal, wherein the first resistors have temperature coefficients of resistance greater than those of the second and third resistors and are arranged closer to the corresponding FET cells than the third resistor.
    Type: Application
    Filed: August 29, 2016
    Publication date: July 20, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Katsuya KATO, Naoki KOSAKA, Eri FUKUDA, Shigeru FUJIWARA, Atsushi OKAMURA, Kenichiro CHOMEI
  • Patent number: 9627300
    Abstract: An amplifier includes a package, a transistor chip having a gate pad and a drain pad formed elongately, the transistor chip being provided in the package, and a plurality of drain bonding wires connected to the drain pad, wherein the plurality of drain bonding wires include a first outer-most bonding wire connected to one of two end portions of the drain pad, a second outer-most bonding wire connected to the other of the two end portions of the drain pad, and an intermediate bonding wire interposed between the first outer-most bonding wire and the second outer-most bonding wire, each of the plurality of drain bonding wires is longer than 1 mm, and the first outer-most bonding wire and the second outer-most bonding wire have loop heights larger than a loop height that the intermediate bonding wire has.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: April 18, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoki Kosaka, Shohei Imai, Atsushi Okamura, Shinichi Miwa, Kenichiro Chomei, Yoshinobu Sasaki, Kenichi Horiguchi
  • Publication number: 20170077012
    Abstract: An amplifier includes a package, a transistor chip having a gate pad and a drain pad formed elongately, the transistor chip being provided in the package, and a plurality of drain bonding wires connected to the drain pad, wherein the plurality of drain bonding wires include a first outer-most bonding wire connected to one of two end portions of the drain pad, a second outer-most bonding wire connected to the other of the two end portions of the drain pad, and an intermediate bonding wire interposed between the first outer-most bonding wire and the second outer-most bonding wire, each of the plurality of drain bonding wires is longer than 1 mm, and the first outer-most bonding wire and the second outer-most bonding wire have loop heights larger than a loop height that the intermediate bonding wire has.
    Type: Application
    Filed: May 17, 2016
    Publication date: March 16, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Naoki KOSAKA, Shohei IMAI, Atsushi OKAMURA, Shinichi MIWA, Kenichiro CHOMEI, Yoshinobu SASAKI, Kenichi HORIGUCHI
  • Publication number: 20160308499
    Abstract: In the present invention, in addition to arranging a plurality of amplifying elements in a staggered manner, signal path lengths from an input-side divider to gate pads of the plurality of amplifying elements are equalized, and signal path lengths from drain pads of the plurality of amplifying elements to an output-side combiner are equalized.
    Type: Application
    Filed: January 12, 2016
    Publication date: October 20, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Naoki KOSAKA, Hiroaki MAEHARA, Ko KANAYA, Miyo MIYASHITA, Kazuya YAMAMOTO
  • Patent number: 9203357
    Abstract: A power amplifier includes a semiconductor substrate including transistor cells, a drain electrode for the transistor cells located on the semiconductor substrate, a drain pad located on the semiconductor substrate and connected to the drain electrode, an ion-implanted resistance located in the semiconductor substrate and extending along and in contact with the drain pad, a floating electrode located on the semiconductor substrate and in contact with the ion-implanted resistance, and an output matching circuit located outside the semiconductor substrate. The power amplifier further includes a wire connecting the drain pad to the output matching circuit.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: December 1, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shinichi Miwa, Yoshihiro Tsukahara, Ko Kanaya, Naoki Kosaka
  • Patent number: 9111061
    Abstract: A transistor characteristic calculation apparatus using a large signal equivalent circuit model has a buffer trap circuit provided between a drain terminal and a source terminal such that a parallel circuit including a resistor and a capacitor, a diode, and another parallel circuit including a resistor and a capacitor are in turn connected in series.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: August 18, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroshi Otsuka, Toshiyuki Oishi, Yutaro Yamaguchi, Naoki Kosaka, Shinichi Miwa, Koji Yamanaka
  • Publication number: 20140019096
    Abstract: A transistor characteristic calculation apparatus using a large signal equivalent circuit model has a buffer trap circuit provided between a drain terminal and a source terminal such that a parallel circuit including a resistor and a capacitor, a diode, and another parallel circuit including a resistor and a capacitor are in turn connected in series.
    Type: Application
    Filed: December 26, 2012
    Publication date: January 16, 2014
    Inventors: Hiroshi OTSUKA, Toshiyuki OISHI, Yutaro YAMAGUCHI, Naoki KOSAKA, Shinichi MIWA, Koji YAMANAKA
  • Patent number: 8471377
    Abstract: A semiconductor circuit substrate includes a transistor-forming substrate and a circuit-forming substrate. The transistor-forming substrate is a GaN substrate and has a Bipolar Junction Transistor (BJT) located in its top surface. The bottom surface of the transistor-forming substrate is flat and has contact regions. The circuit-forming substrate is a material other than a compound semiconductor and has no semiconductor active elements. The circuit-forming substrate has a flat top surface, contact regions buried in and exposed at the top surface, and passive circuits. The transistor-forming substrate and the circuit-forming substrate are directly bonded together without any intervening film, such as an insulating film.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: June 25, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoki Kosaka, Hirotaka Amasuga, Kou Kanaya
  • Patent number: 8440538
    Abstract: In making an airbridge structure, a second resist layer is applied over a first resist layer. The resist layers are exposed and developed to have a predetermined width W2. A third resist layer is applied. The third resist layer is also exposed and developed to have a predetermined width W3. An airbridge-forming material layer is applied to the layer stack structure consisting of the first, second, and third resist layers, forming an airbridge. The resist layers are removed, completing the manufacture of the airbridge, which has a stepped cross section.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: May 14, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoki Kosaka, Ko Kanaya, Yoshihiro Tsukahara