Patents by Inventor Norikazu Miyazaki

Norikazu Miyazaki 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: 20230008088
    Abstract: A magnetic sensor device includes at least one magnetic sensor and a support. A center of gravity of an element layout area of the at least one magnetic sensor is deviated from a center of gravity of a reference plane of the support. The at least one magnetic sensor includes four resistor sections constituted by a plurality of magnetoresistive elements. Magnetization of a free layer in each of two of the resistor sections includes a component in a third magnetization direction. The magnetization of a free layer in each of the other two resistor sections includes a component in a fourth magnetization direction opposite to the third magnetization direction.
    Type: Application
    Filed: May 2, 2022
    Publication date: January 12, 2023
    Applicant: TDK CORPORATION
    Inventors: Norikazu OTA, Hiraku HIRABAYASHI, Kazuma YAMAWAKI, Shuhei MIYAZAKI, Kazuya WATANABE
  • Patent number: 11506950
    Abstract: In an optical waveguide element which uses a rib type optical waveguide, light propagating in the rib type optical waveguide is monitored stably and accurately. The optical waveguide element includes a rib type optical waveguide provided on a optical waveguide substrate and configured of a convex portion protruding in a thickness direction of the optical waveguide substrate and extending in a plane direction of the optical waveguide substrate, and a light receiving element configured of a light receiving part formed on a light receiving element substrate disposed on the rib type optical waveguide and configured to receive at least a part of light propagating through the rib type optical waveguide, and the light receiving element substrate is supported by at least one first convex portion having the same height as that of the rib type optical waveguide provided on the optical waveguide substrate.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: November 22, 2022
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Yu Nakata, Norikazu Miyazaki
  • Patent number: 11500263
    Abstract: An optical modulator has an optical modulation element including optical waveguides and a housing that accommodates the optical modulation element. The housing has a bottom surface wall having a quadrilateral shape in a plan view, first and second long side walls that are connected to two opposite edges of the bottom surface wall, and first and second short side walls, shorter than the long side walls, and connected to two other opposite edges of the bottom surface wall. The optical modulation element is accommodated in a space surrounded by the bottom surface wall and the side walls. The second long side wall has a wall thickness that is equal to or larger than that of the first long side wall, and at least one of the first and second short side walls has a wall thickness that is thinner than that of the first long side wall.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: November 15, 2022
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 11500264
    Abstract: An optical waveguide device includes a substrate on which an optical waveguide is formed, and an object that is disposed on the substrate. The optical waveguide includes a mode conversion/branching portion that converts a mode of a light wave propagating through the optical waveguide and branches the light wave, and the object is disposed to cover a part or the whole of the mode conversion/branching portion or not to cover the mode conversion/branching portion when the substrate is viewed in a plan view. In a case where the object is disposed to cover a part of the mode conversion/branching portion, the object is disposed not to consecutively cover a section over a length of a predetermined value or higher in an advancing direction of a light wave.
    Type: Grant
    Filed: August 11, 2021
    Date of Patent: November 15, 2022
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kei Katou, Norikazu Miyazaki
  • Publication number: 20220357605
    Abstract: An optical modulator includes a relay substrate having signal conductor patterns that connect input signal terminals and signal electrodes of an optical modulation element and ground conductor patterns, and a housing that accommodates the optical modulation element and the relay substrate. Regarding at least one signal conductor pattern, the two ground conductor patterns sandwiching the signal conductor pattern are formed in an asymmetrical shape in a plan view in a rectangular connection area including a signal connection portion at which the signal conductor pattern and the input signal terminal are connected. The connection area is centered on the at least one signal conductor pattern in a width direction, and has a width equal to a distance to the nearest adjacent signal conductor pattern and a height equal to a distance from an end of the signal connection portion farthest from a signal input side to the signal input side.
    Type: Application
    Filed: June 18, 2020
    Publication date: November 10, 2022
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Publication number: 20220342241
    Abstract: An optical modulator includes: an optical modulation element that is configured to generate two modulated light beams, each of which is modulated by two sets of electrical signals, and that includes a plurality of signal electrodes; a plurality of signal input terminals, each of which inputs an electrical signal; a relay substrate on which a plurality of signal conductor patterns and a plurality of ground conductor patterns are formed, the relay substrate being configured to propagate the two sets of electrical signals by two pairs of the adjacent signal conductor patterns; and a housing, in which the at least two signal conductor patterns including at least one parts mounting part including electrical circuit elements are configured such that first signal propagation directions, which are signal propagation directions at the parts mounting parts, are different from each other.
    Type: Application
    Filed: September 15, 2020
    Publication date: October 27, 2022
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Publication number: 20220334415
    Abstract: An optical modulator includes: an optical modulation element including a plurality of signal electrodes and generating two modulated light beams, each of which is modulated by two sets of electrical signals; a plurality of signal input terminals, each of which inputs an electrical signal; a relay substrate on which a plurality of signal and ground conductor patterns are formed, the relay substrate propagating the two sets of electrical signals by two pairs of the adjacent signal conductor patterns; and a housing, in which at least one signal conductor pattern includes at least one component mounting portion including at least a parallel circuit of a resistor and a capacitor, and the relay substrate includes a metal body connected on the ground conductor pattern or a substrate removal portion that sandwiches a portion of the signal conductor pattern downstream of the component mounting portion along a propagation direction of the electrical signal.
    Type: Application
    Filed: September 15, 2020
    Publication date: October 20, 2022
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 11460650
    Abstract: An optical waveguide device includes: a substrate having an electro-optic effect, an optical waveguide formed on the substrate, a light-receiving element disposed on the substrate and monitoring a light wave propagating through the optical waveguide or a light wave that is radiated from the optical waveguide; and a monitoring optical waveguide extending from the optical waveguide to the light-receiving element, in which the monitoring optical waveguide has a U-turn waveguide with respect to an output direction of the optical waveguide, and the light-receiving element is disposed at a part of the monitoring optical waveguide after the U-turn waveguide.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: October 4, 2022
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Yu Nakata
  • Publication number: 20220308286
    Abstract: An optical waveguide element includes: a substrate; and a plurality of optical waveguides causing light to turn between a first direction and a second direction that is an opposite direction of the first direction in a plane of the substrate, the plurality of optical waveguides includes first portions extending in the first direction with a predetermined distance therebetween, second portions extending in a third direction that is different from the first direction, and third portions extending in the second direction, and each of the plurality of optical waveguides except for the optical waveguide in which the second portion extending in the third direction is located on an innermost side in the first direction intersects, at the third portion, another optical waveguide in which the second portion extending in the third direction is located further inward in the first direction.
    Type: Application
    Filed: March 15, 2022
    Publication date: September 29, 2022
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Yu NAKATA, Yu KATAOKA, Norikazu MIYAZAKI
  • Publication number: 20220291447
    Abstract: Provided is an optical waveguide element that prevents leaked light generated at a forking section from entering a downstream optical waveguide such as another forking section, thereby affording minimal degradation of optical characteristics. The optical waveguide is characterized in that: at least one of two fork waveguides (20a, 20b) forking from a first forking section (20) comprises a second forking section (21, 22); slab waveguides (3c-1 to 3c-3) are formed between the two fork waveguides; and between the first forking section and the second forking section, slits (41, 42) are formed that partition the slab waveguides into a first slab waveguide area (3c-1) close to the first forking section and second slab waveguide areas (3c-2, 3c-3) close to the second forking section(s).
    Type: Application
    Filed: September 23, 2020
    Publication date: September 15, 2022
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Yu KATAOKA, Norikazu MIYAZAKI
  • Publication number: 20220291533
    Abstract: An optical modulator includes a relay substrate having signal conductor patterns that connect signal input terminals and signal electrodes of an optical modulation element and ground conductor patterns, and a housing, in which the signal conductor pattern includes a component mounting portion including an electrical circuit element. Two ground conductor patterns sandwiching the signal conductor pattern are formed in an asymmetrical shape in a plan view within a component mounting area having a square shape in the plan view centered on the component mounting portion. A direction of a side of the component mounting area having the square shape is same as the extending direction of the signal conductor pattern and a length of a side of the component mounting area is equal to a distance from a center of the component mounting portion to a portion on an adjacent signal conductor pattern closest to the center.
    Type: Application
    Filed: August 7, 2020
    Publication date: September 15, 2022
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 11402594
    Abstract: An optical waveguide device includes a substrate on which an optical waveguide is formed, and a reinforcing block disposed on the substrate, along an end surface of the substrate on which an input portion or an output portion of the optical waveguide is disposed, in which an optical component that is joined to both the end surface of the substrate and an end surface of the reinforcing block is provided, a material used for a joining surface of the optical component and a material used for the substrate or the reinforcing block have at least different linear expansion coefficients of a direction parallel to the joining surface, and an area of a joining portion of the optical component is set to be smaller than an area of the end surfaces including joining portions of the substrate and the reinforcing block.
    Type: Grant
    Filed: March 26, 2021
    Date of Patent: August 2, 2022
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kei Kato, Hideki Ichimei, Norikazu Miyazaki
  • Patent number: 11397365
    Abstract: An optical modulator that can effectively dissipate heat generated from the inside includes: an optical modulation element which includes an optical waveguide and a radio frequency electrode for controlling light waves propagating through the optical waveguide; a termination resistor electrically connected to the radio frequency electrode; a termination resistor board on which the termination resistor is disposed; and a package case, which houses the optical modulation element and the termination resistor board, in which a plurality of protrusion portions are formed on one external surface of the package case, and at least one of the protrusion portions is formed at a position on the external surface of the package case, which faces a position inside the package case where the termination resistor board is disposed with the package case in between.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: July 26, 2022
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 11397341
    Abstract: An initial change and a secular change in an optical characteristic and a high frequency characteristic in a case where an optical modulator is mounted in a package of an optical transmission apparatus are suppressed while improving a space utilization rate in the package of the optical transmission apparatus. An optical modulator that is electrically connected to an electric circuit configured on a circuit board, includes: a package that houses an optical modulation element; and a signal input part or the like for inputting an electric signal for causing the optical modulation element to perform an modulation operation from the electric circuit, in which the package has, on a part of a bottom surface facing the circuit board, a first protrusion portion protruding from the bottom surface, and the signal input part is provided on an upper surface of the first protrusion portion.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: July 26, 2022
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 11397364
    Abstract: In an optical modulator, high frequency characteristics are improved and the stability thereof is improved. An optical modulator includes: an optical element substrate that includes an optical waveguide and a plurality of electrodes that control light waves propagating through the optical waveguide; and a package case that houses the optical element substrate, in which a plurality of signal input terminals, respectively electrically connected to the plurality of electrodes, are provided on the bottom surface of the package case, and the plurality of signal input terminals respectively electrically connected to the plurality of electrodes provided on the optical element substrate are divided and disposed on the sides facing each other with the optical element substrate interposed therebetween.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: July 26, 2022
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Publication number: 20220197104
    Abstract: Provided is an optical modulator that can be driven at lower voltage through the use of differential signal output. An optical modulator includes a substrate 1 and optical waveguides (21, 22) and a control electrode that are formed on the substrate, in which the optical waveguide includes Mach-Zehnder type optical waveguide, the control electrode is provided with two ground electrodes sandwiching three signal electrodes; the three signal electrodes are constituted by second and third signal electrodes that sandwich a first signal electrode, and have a wiring structure in which one modulation signal of the differential signal is applied to the first signal electrode, and the other modulation signal of the differential signal is applied to the second and third signal electrodes; and one branched waveguide (21) out of two Mach-Zehnder type optical waveguides is disposed between the first and second signal electrodes, and the other branched waveguide (22) is disposed between the first and third signal electrodes.
    Type: Application
    Filed: September 26, 2019
    Publication date: June 23, 2022
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu MIYAZAKI, Kosuke OKAHASHI, Masayuki MOTOYA
  • Publication number: 20220197103
    Abstract: An optical modulation element that can be housed in the same housing together with an electronic circuit is implemented without deteriorating the high-frequency characteristics and the optical modulation characteristics and without increasing a size of the housing.
    Type: Application
    Filed: September 26, 2019
    Publication date: June 23, 2022
    Inventors: Yuu Nakata, Norikazu Miyazaki, Satoshi Oikawa
  • Publication number: 20220179248
    Abstract: Provided is an optical waveguide element that prevents damage to a substrate and improves productivity. In an optical waveguide element in which an optical waveguide (24, 23) is formed on a substrate 1, a groove portion 3 is formed in at least a part of the substrate along an outer periphery 10 of the substrate 1.
    Type: Application
    Filed: September 26, 2019
    Publication date: June 9, 2022
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kenta OISHI, Norikazu MIYAZAKI
  • Publication number: 20220179247
    Abstract: In order to provide an optical modulator capable of preventing damage to the substrate and preventing deterioration of the properties of the modulator by reducing the stress on the substrate generated by the modulation electrode, there is provided an optical modulator 1, including: a substrate 5 having an electro-optic effect; an optical waveguide 10 formed on the substrate 5; and a modulation electrode (signal electrode S and ground electrode G) provided on the substrate 5 and modulating a light wave propagating in the optical waveguide 10, wherein a resin 8 to reduce the stress on the substrate 5 generated by the modulation electrode is arranged between a part of the bottom surface of the modulation electrode and the substrate 5 facing a part of the bottom surface of the modulation electrode.
    Type: Application
    Filed: August 14, 2019
    Publication date: June 9, 2022
    Inventors: Kosuke OKAHASHI, Norikazu MIYAZAKI, Masayuki MOTOYA
  • Publication number: 20220163825
    Abstract: In order to provide an optical waveguide element that is capable of reducing coupling loss at a coupling portion with an optical fiber and of reducing propagation loss in an optical waveguide, the optical waveguide element comprises a supporting substrate and a waveguide layer consisting of a material having an electro-optic effect stacked on the supporting substrate, wherein a rib portion for forming an optical waveguide is provided protruding on an upper surface of the waveguide layer; a groove portion is formed on an upper surface of the supporting substrate directly below a part of the rib portion; and the groove portion is filled with a material having an effective refractive index comparable to that of the waveguide layer.
    Type: Application
    Filed: September 27, 2019
    Publication date: May 26, 2022
    Inventors: Yu KATAOKA, Norikazu MIYAZAKI