Patents by Inventor Toru Sugamata

Toru Sugamata 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: 20210199997
    Abstract: An optical waveguide element is provided to effectively reduce an optical absorption loss of waveguide light which may occur at an intersecting part between an optical waveguide and an electrode without causing deterioration in optical characteristics and degradation of long-term reliability of the optical waveguide element. The optical waveguide element includes an optical waveguide formed in a substrate, and an electrode controlling optical waves propagated in the optical waveguide and having an intersecting part intersecting the optical waveguide thereabove. A portion of a resin layer is provided between the optical waveguide and the electrode in a portion of the substrate including the intersecting part. A corner of the resin layer on a side of the electrode is constituted to be a curve in a cross section in an extending direction of the electrode.
    Type: Application
    Filed: November 26, 2020
    Publication date: July 1, 2021
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kousuke OKAHASHI, Toru SUGAMATA
  • Patent number: 11029577
    Abstract: An optical modulator includes an optical modulation element having a plurality of signal electrodes; a housing that houses the optical modulation element; a plurality of signal input terminals each of which inputs an electrical signal to be applied to each of the signal electrodes; and a relay substrate on which a plurality of signal conductor patterns that electrically connect each of the signal input terminals to each of the signal electrodes, and a plurality of ground conductor patterns are formed, in which the relay substrate is housed in the housing, and at least one input side ground conductor pattern extending from at least one of the ground conductor patterns is formed on an input side surface having a side on which an electrical signal output from the signal input terminal is input to the signal conductor pattern as one side.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: June 8, 2021
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Publication number: 20210165299
    Abstract: An optical waveguide element including a substrate, an optical waveguide formed on the substrate, and an electrode for controlling a light wave propagating through the optical waveguide, in which the optical waveguide and the electrode have an intersection in which the optical waveguide and the electrode intersect with each other, and at the intersection, the electrode has a multilayer structure including a plurality of metal layers made of a metal material, and a resin layer made of a resin material is formed between the electrode and the substrate.
    Type: Application
    Filed: November 27, 2020
    Publication date: June 3, 2021
    Inventors: Masayuki Motoya, Toru Sugamata
  • Publication number: 20210157176
    Abstract: To suppress characteristic fluctuations and or the degradation of long-term reliability attributed to the disposition of a heat-generating electronic component close to an optical modulator.
    Type: Application
    Filed: June 28, 2019
    Publication date: May 27, 2021
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Publication number: 20210149268
    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: Application
    Filed: June 28, 2019
    Publication date: May 20, 2021
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 10935821
    Abstract: Provided is an optical modulator capable of effectively dispersing and releasing heat generated by termination resistors, improving the reliability of a termination substrate including the termination resistors, and reducing influence of heat on an optical waveguide.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: March 2, 2021
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventor: Toru Sugamata
  • Patent number: 10921620
    Abstract: An optical modulator includes an optical modulation element (102) including a plurality of signal electrodes (112a and the like), a plurality of lead pins (116a and the like) for inputting high frequency signals, and a relay substrate (118) in which conductor patterns (202a and the like) that electrically connect the lead pins and the signal electrodes are formed, and at least one of the conductor patterns in the optical modulator is constituted so that at least one resonant frequency of the at least one of the conductor patterns is different from at least one resonant frequency of at least one of the other conductor patterns.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: February 16, 2021
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Toru Sugamata, Norikazu Miyazaki
  • Publication number: 20210026217
    Abstract: An optical modulator that can effectively dissipate heat generated from the inside includes: an optical modulation element which includes an optical ave aide 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: Application
    Filed: February 1, 2019
    Publication date: January 28, 2021
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Publication number: 20200409230
    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: Application
    Filed: January 23, 2019
    Publication date: December 31, 2020
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Publication number: 20200379278
    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, in which the package has, on a bottom surface facing the circuit board, a plurality of first protruding bodies protruding from the bottom surface.
    Type: Application
    Filed: January 11, 2019
    Publication date: December 3, 2020
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Publication number: 20200379279
    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: Application
    Filed: January 11, 2019
    Publication date: December 3, 2020
    Inventors: Norikazu MIYAZAKI, Toru SUGAMATA
  • Patent number: 10816831
    Abstract: An optical modulator using an optical modulation element in which an optical waveguide and a plurality of electrodes for controlling light waves propagating through the optical waveguide are formed on a substrate, in which at least one stress relieving structure is provided on an upper surface of the electrode opposite to a surface of the substrate in order to relieve stress generated due to pressure applied at the time of wire-bonding of a metal wire.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: October 27, 2020
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Minoru Shinozaki, Toru Sugamata
  • Publication number: 20200326605
    Abstract: To provide a highly-reliable low-cost small optical modulator in which temperature drift is suppressed and an optical transmission device using the same. An optical modulator including an optical waveguide substrate 1 on which an optical waveguide is formed, a signal electrode which is provided on the optical waveguide substrate and applies an electric field to the optical waveguide, a termination substrate 3 provided with a termination resistor that terminates the signal electrode, and a housing 6 in which the optical waveguide substrate and the termination substrate are mounted, in which, in order to suppress conduction of heat generated from the termination resistor to the optical waveguide substrate through the housing, a groove 8 is formed in the housing 6 between the termination substrate 3 and the optical waveguide substrate 1.
    Type: Application
    Filed: June 25, 2020
    Publication date: October 15, 2020
    Inventor: Toru SUGAMATA
  • Publication number: 20200310218
    Abstract: An optical modulator includes an optical modulation element having a plurality of signal electrodes; a plurality of signal input terminals each of which inputs an electrical signal to be applied to each signal electrode; a relay substrate on which a plurality of signal conductor patterns electrically connecting the signal input terminals and the signal electrodes, and a plurality of ground conductor patterns are formed; and a housing that houses the optical modulation element and the relay substrate, in which the relay substrate has at least one groove extending from the signal input side on which the signal input terminal is connected to the signal conductor pattern, in at least one ground conductor pattern formed between adjacent signal conductor patterns, and the groove is formed such that a length extending from the signal input side is longer than a length of the signal input terminal extending on the signal conductor pattern.
    Type: Application
    Filed: October 28, 2019
    Publication date: October 1, 2020
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 10788726
    Abstract: An optical modulator includes an optical modulation element having a plurality of signal electrodes; a plurality of signal input terminals each of which inputs an electrical signal to be applied to each signal electrode; a relay substrate on which a plurality of signal conductor patterns electrically connecting the signal input terminals and the signal electrodes, and a plurality of ground conductor patterns are formed; and a housing that houses the optical modulation element and the relay substrate, in which the relay substrate has at least one groove extending from the signal input side on which the signal input terminal is connected to the signal conductor pattern, in at least one ground conductor pattern formed between adjacent signal conductor patterns, and the groove is formed such that a length extending from the signal input side is longer than a length of the signal input terminal extending on the signal conductor pattern.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: September 29, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Publication number: 20200292909
    Abstract: An optical modulator includes an optical modulation element having a plurality of signal electrodes; a housing that houses the optical modulation element; a plurality of signal input terminals each of which inputs an electrical signal to be applied to each of the signal electrodes; and a relay substrate on which a plurality of signal conductor patterns that electrically connect each of the signal input terminals to each of the signal electrodes, and a plurality of ground conductor patterns are formed, in which the relay substrate is housed in the housing, and at least one input side ground conductor pattern extending from at least one of the ground conductor patterns is formed on an input side surface having a side on which an electrical signal output from the signal input terminal is input to the signal conductor pattern as one side.
    Type: Application
    Filed: October 28, 2019
    Publication date: September 17, 2020
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 10732481
    Abstract: To provide a highly-reliable low-cost small optical modulator in which temperature drift is suppressed and an optical transmission device using the same. An optical modulator including an optical waveguide substrate 1 on which an optical waveguide is formed, a signal electrode which is provided on the optical waveguide substrate and applies an electric field to the optical waveguide, a termination substrate 3 provided with a termination resistor that terminates the signal electrode, and a housing 6 in which the optical waveguide substrate and the termination substrate are mounted, in which, in order to suppress conduction of heat generated from the termination resistor to the optical waveguide substrate through the housing, a groove 8 is formed in the housing 6 between the termination substrate 3 and the optical waveguide substrate 1.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: August 4, 2020
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventor: Toru Sugamata
  • Patent number: 10698288
    Abstract: Provided is an optical modulator in which an optical modulation element is accommodated in a housing. A plurality of lead pins, which are electrically connected to the optical modulation element through wire bonding, are fixed to the housing in a manner of protruding at least a part of each of the plurality of lead pins into the housing. In the plurality of lead pins, lengths of the lead pins are set to be different from each other so that a natural frequency of at least partial lead pins is different from a natural frequency of the other lead pins.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: June 30, 2020
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 10642124
    Abstract: A small and inexpensive optical modulator having suppressed temperature drift and high reliability and an optical transmission device using the same are provided. The optical modulator includes an optical waveguide substrate where an optical waveguide is formed; a control electrode that is provided on the optical waveguide substrate and applies an electric field to the optical waveguide; and a relay substrate that is disposed in the vicinity of the optical waveguide substrate and includes electrical wirings that relay electrical signals from the outside to the control electrode. The control electrode includes a signal electrode. The optical modulator comprises terminating units that include terminal resistors that terminate the signal electrode. At least a part of the terminating units are provided on the relay substrate.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: May 5, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 10595398
    Abstract: To suppress peeling-off or cracks of a solder-fixing portion, which are caused by vibration during transportation or operation, in an optical modulator with FPC, thereby suppressing deterioration of radio-frequency characteristics of a signal path in an effective manner at low cost. An optical modulator 100 includes a flexible printed circuit (106) that performs electrical connection with a circuit substrate. The flexible printed circuit has a substantially quadrilateral shape. In the flexible printed circuit, a pad (210 and the like), which is electrically connected to the circuit substrate, is provided along one side of the substantial quadrilateral. In addition, in the flexible printed circuit, signal patterns (220 and the like), which are connected to signal lead pins (120 and the like) for signal transmission which is provided in the optical modulator, are provided in another side opposite to the one side.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: March 17, 2020
    Inventors: Norikazu Miyazaki, Toru Sugamata