Patents by Inventor Koji Choki

Koji Choki 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: 8774575
    Abstract: An optical waveguide includes a clad layer, a core layer and a clad layer which are laminated together in this order from a lower side thereof. Within the core layer, a core portion and a side clad portion provided adjacent to the core portion so as to surround side surfaces of the core portion are formed. Further, a part of the side clad portion prevents a left side end of the core portion from being exposed outside. A mirror formation region is constituted from a region consisting of such a part of the side clad portion and a part of each of the clad layers located thereabove and therebelow. This mirror formation region is subjected to digging processing so that a concave portion is formed. An inner surface of this concave portion serves as the mirror. From the mirror, a material other than a material constituting the core portion, that is, a material constituting each of the clad layers and a material constituting the side clad portion are exposed.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: July 8, 2014
    Assignee: Sumitomo Bakelite Company Limited
    Inventors: Makoto Fujiwara, Kenji Miyao, Yoji Shirato, Koji Choki, Mutsuhiro Matsuyama
  • Patent number: 8705925
    Abstract: An optical waveguide film includes at least one optical waveguide area having an X-direction and a Y-direction orthogonal to the X-direction. Such an optical waveguide film includes a plurality of core portions arranged side by side within the same layer so as to extend along the X-direction, each of the core portions having side surfaces, and the core portions adjoining to each other in the Y-direction being arranged through a gap therebetween; and a plurality of cladding portions provided so as to cover the side surfaces of each of the core portions, each of the cladding portions formed of a resin having an optical refractive index smaller than that of each of the core portions, and the cladding portion between the adjoining core portions providing each gap. In the optical waveguide film, a size of the gap between the adjoining core portions varies along the X-direction in at least a part of the optical waveguide area.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: April 22, 2014
    Assignee: Sumitomo Bakelite Company Limited
    Inventors: Shinsuke Terada, Koji Choki
  • Patent number: 8588566
    Abstract: According to the electronic apparatus and cellular phone of the present invention, in an optical waveguide forming body of a flexible cable, an air layer is provided in a deforming section which experiences bending deformation as a result of the movement of a second body relative to a first body (either a pivoting or sliding movement), and the position of this air layer becomes located on the outer circumferential side of a core when the deforming section undergoes bending deformation. As a result of this, it is possible to ensure sufficient flexibility and to also achieve a sufficient improvement in the folding endurance of the core portion for this optical waveguide forming body to be utilized in practical applications. Moreover, it is possible to suppress light loss and achieve high-speed, large-capacity transmissions even when the optical waveguide forming body of a flexible cable experiences bending deformation due to the relative movement of the second body relative to the first body.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: November 19, 2013
    Assignee: Sumitomo Bakelite Co., Ltd.
    Inventors: Mutsuhiro Matsuyama, Koji Choki, Tetsuya Mori, Kei Watanabe
  • Patent number: 8420293
    Abstract: Embodiments in accordance with the present invention provide waveguide structures and methods of forming such structures where core and laterally adjacent cladding regions are defined. Some embodiments of the present invention provide waveguide structures where core regions are collectively surrounded by laterally adjacent cladding regions and cladding layers and methods of forming such structures.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: April 16, 2013
    Assignees: Sumitomo Bakelite Co., Ltd., Promerus, LLC
    Inventors: Koji Choki, Tetsuya Mori, Ramakrishna Ravikiran, Makoto Fujiwara, Keizo Takahama, Kei Watanabe, Hirotaka Nonaka, Yumiko Otake, Andrew Bell, Larry Rhodes, Dino Amoroso, Mutsuhiro Matsuyama
  • Patent number: 8208769
    Abstract: A substrate on which an optical element is mounted is provided, including: an optical element; an optical circuit substrate which is formed by an optical waveguide layer having a core portion and cladding portions; and an electrical circuit substrate on which is provided a mounting portion that is used for mounting the optical element, wherein the optical element is mounted on the electrical circuit substrate via the optical circuit substrate and wherein the optical circuit substrate has an optical element mounted thereon and is provided with a receptor structure having a conductive portion that conducts electricity between an electrode of the optical element and an electrode of the electrical circuit substrate.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: June 26, 2012
    Assignee: Sumitomo Bakelite Co., Ltd.
    Inventors: Koji Choki, Mutsuhiro Matsuyama, Kenji Miyao, Keizo Takahama, Tetsuya Mori, Kei Watanabe, Hiroshi Owari, Yoji Shirato
  • Patent number: 8200058
    Abstract: An optical waveguide structure has excellent heat resistance and a low water absorbing property and can be manufactured with a low material cost. Such an optical waveguide structure includes: an optical waveguide having two surfaces, a core layer including core portions and cladding portions each having a refractive index lower than that of each of the core portions, the core layer having two surfaces, and cladding layers provided so as to make contact with the two surfaces of the core layer and having a refractive index lower than that of each of the core portions; and conductor layers provided on the two surfaces of the optical waveguide. In the optical waveguide structure, each of the cladding layers is formed of a norbornene-based polymer as a major component thereof.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: June 12, 2012
    Assignee: Sumitomo Bakelite Company, Ltd.
    Inventors: Koji Choki, Tetsuya Mori, Keizo Takahama, Makoto Fujiwara, Kei Watanabe, Hiroshi Owari
  • Publication number: 20120064458
    Abstract: Embodiments in accordance with the present invention provide waveguide structures and methods of forming such structures where core and laterally adjacent cladding regions are defined. Some embodiments of the present invention provide waveguide structures where core regions are collectively surrounded by laterally adjacent cladding regions and cladding layers and methods of forming such structures.
    Type: Application
    Filed: August 10, 2011
    Publication date: March 15, 2012
    Applicants: PROMERUS, LLC, SUMITOMO BAKELITE COMPANY LIMITED
    Inventors: Koji CHOKI, Tetsuya Mori, Ramakrishna Ravikiran, Makoto Fujiwara, Keizo Takahama, Kei Watanabe, Hirotaka Nonaka, Yumiko Otake, Andrew Bell, Larry Rhodes, Dino Amoroso, Mutsuhiro Matsuyama
  • Patent number: 8053166
    Abstract: Embodiments in accordance with the present invention provide waveguide structures and methods of forming such structures where core and laterally adjacent cladding regions are defined. Some embodiments of the present invention provide waveguide structures where core regions are collectively surrounded by laterally adjacent cladding regions and cladding layers and methods of forming such structures.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: November 8, 2011
    Assignees: Sumitomo Bakelite Co. Ltd., Promerus, LLC.
    Inventors: Koji Choki, Tetsuya Mori, Ramakrishna Ravikiran, Makoto Fujiwara, Keizo Takahama, Kei Watanabe, Hirotaka Nonaka, Yumiko Otake, Andrew Bell, Larry Rhodes, Dino Amoroso, Mutsuhiro Matsuyama
  • Publication number: 20110243499
    Abstract: An optical waveguide includes a clad layer, a core layer and a clad layer which are laminated together in this order from a lower side thereof. Within the core layer, a core portion and a side clad portion provided adjacent to the core portion so as to surround side surfaces of the core portion are formed. Further, a part of the side clad portion prevents a left side end of the core portion from being exposed outside. A mirror formation region is constituted from a region consisting of such a part of the side clad portion and a part of each of the clad layers located thereabove and therebelow. This mirror formation region is subjected to digging processing so that a concave portion is formed. An inner surface of this concave portion serves as the mirror. From the mirror, a material other than a material constituting the core portion, that is, a material constituting each of the clad layers and a material constituting the side clad portion are exposed.
    Type: Application
    Filed: December 1, 2009
    Publication date: October 6, 2011
    Applicant: SUMITOMO BAKELITE COMPANY LIMITED
    Inventors: Makoto Fujiwara, Kenji Miyao, Yoji Shirato, Koji Choki, Mutsuhiro Matsuyama
  • Patent number: 8021825
    Abstract: Embodiments in accordance with the present invention provide waveguide structures and methods of forming such structures where core and laterally adjacent cladding regions are defined. Some embodiments of the present invention provide waveguide structures where core regions are collectively surrounded by laterally adjacent cladding regions and cladding layers and methods of forming such structures.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: September 20, 2011
    Assignees: Sumitomo Bakelite Co., Ltd., Promerus, LLC.
    Inventors: Koji Choki, Tetsuya Mori, Ramakrishna Ravikiran, Makoto Fujiwara, Keizo Takahama, Kei Watanabe, Hirotaka Nonaka, Yumiko Otake, Andrew Bell, Larry Rhodes, Dino Amoroso, Mutsuhiro Matsuyama
  • Publication number: 20110158596
    Abstract: An optical waveguide is provided. The optical waveguide includes a plurality of core portions and a plurality of clad portions in which each core portion being provided between a pair of clad portions. Each of the plurality of clad portions comprises: a low refractive-index area being in contact with the core portion, wherein a refractive index of the low refractive-index area is lower than that of the plurality of core portions; and a plurality of high refractive-index areas separated from the core portion through the low refractive-index area, wherein a refractive index of the plurality of high refractive-index areas is higher than the refractive index of the low refractive-index area. The plurality of high refractive-index areas are provided in the clad portion in an aligned manner or in a scattered manner. The plurality of high refractive-index areas are constituted of the same kind of material as a constituent material of the plurality of core portions.
    Type: Application
    Filed: August 28, 2009
    Publication date: June 30, 2011
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventors: Shinsuke Terada, Mutsuhiro Matsuyama, Koji Choki
  • Publication number: 20110110623
    Abstract: An optical waveguide film includes at least one optical waveguide area having an X-direction and a Y-direction orthogonal to the X-direction. Such an optical waveguide film includes a plurality of core portions arranged side by side within the same layer so as to extend along the X-direction, each of the core portions having side surfaces, and the core portions adjoining to each other in the Y-direction being arranged through a gap therebetween; and a plurality of cladding portions provided so as to cover the side surfaces of each of the core portions, each of the cladding portions formed of a resin having an optical refractive index smaller than that of each of the core portions, and the cladding portion between the adjoining core portions providing each gap. In the optical waveguide film, a size of the gap between the adjoining core portions varies along the X-direction in at least a part of the optical waveguide area.
    Type: Application
    Filed: June 16, 2009
    Publication date: May 12, 2011
    Applicant: Sumitomo Bakelite Company Limited
    Inventors: Shinsuke Terada, Koji Choki
  • Publication number: 20110085771
    Abstract: According to the electronic apparatus and cellular phone of the present invention, in an optical waveguide forming body of a flexible cable, an air layer is provided in a deforming section which experiences bending deformation as a result of the movement of a second body relative to a first body (either a pivoting or sliding movement), and the position of this air layer becomes located on the outer circumferential side of a core when the deforming section undergoes bending deformation. As a result of this, it is possible to ensure sufficient flexibility and to also achieve a sufficient improvement in the folding endurance of the core portion for this optical waveguide forming body to be utilized in practical applications. Moreover, it is possible to suppress light loss and achieve high-speed, large-capacity transmissions even when the optical waveguide forming body of a flexible cable experiences bending deformation due to the relative movement of the second body relative to the first body.
    Type: Application
    Filed: June 9, 2009
    Publication date: April 14, 2011
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventors: Mutsuhiro Matsuyama, Koji Choki, Tetsuya Mori, Kei Watanabe
  • Patent number: 7869670
    Abstract: A substrate on which an optical element is mounted is provided, including: an optical element; an optical circuit substrate which is formed by an optical waveguide layer having a core portion and cladding portions; and an electrical circuit substrate on which is provided a mounting portion that is used for mounting the optical element, wherein the optical element is mounted on the electrical circuit substrate via the optical circuit substrate and wherein the optical circuit substrate has an optical element mounted thereon and is provided with a receptor structure having a conductive portion that conducts electricity between an electrode of the optical element and an electrode of the electrical circuit substrate.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: January 11, 2011
    Assignee: Sumitomo Bakelite Co., Ltd.
    Inventors: Koji Choki, Mutsuhiro Matsuyama, Kenji Miyao, Keizo Takahama, Tetsuya Mori, Kei Watanabe, Hiroshi Owari, Yoji Shirato
  • Patent number: 7820356
    Abstract: Embodiments in accordance with the present invention provide waveguide structures and methods of forming such structures where core and laterally adjacent cladding regions are defined. Some embodiments of the present invention provide waveguide structures where core regions are collectively surrounded by laterally adjacent cladding regions and cladding layers and methods of forming such structures.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: October 26, 2010
    Assignees: Sumitomo Bakelite Co. Ltd., Promerus, LLC
    Inventors: Koji Choki, Tetsuya Mori, Ramakrishna Ravikiran, Makoto Fujiwara, Keizo Takahama, Kei Watanabe, Hirotaka Nonaka, Yumiko Otake, Andrew Bell, Larry Rhodes, Dino Amoroso, Mutsuhiro Matsuyama
  • Publication number: 20100226606
    Abstract: A substrate on which an optical element is mounted is provided, including: an optical element; an optical circuit substrate which is formed by an optical waveguide layer having a core portion and cladding portions; and an electrical circuit substrate on which is provided a mounting portion that is used for mounting the optical element, wherein the optical element is mounted on the electrical circuit substrate via the optical circuit substrate and wherein the optical circuit substrate has an optical element mounted thereon and is provided with a receptor structure having a conductive portion that conducts electricity between an electrode of the optical element and an electrode of the electrical circuit substrate.
    Type: Application
    Filed: May 21, 2010
    Publication date: September 9, 2010
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventors: Koji CHOKI, Mutsuhiro Matsuyama, Kenji Miyao, Keizo Takahama, Tetsuya Mori, Kei Watanabe, Hiroshi Owari, Yoji Shirato
  • Publication number: 20100067861
    Abstract: An optical waveguide structure has excellent heat resistance and a low water absorbing property and can be manufactured with a low material cost. Such an optical waveguide structure includes: an optical waveguide having two surfaces, a core layer including core portions and cladding portions each having a refractive index lower than that of each of the core portions, the core layer having two surfaces, and cladding layers provided so as to make contact with the two surfaces of the core layer and having a refractive index lower than that of each of the core portions; and conductor layers provided on the two surfaces of the optical waveguide. In the optical waveguide structure, each of the cladding layers is formed of a norbornene-based polymer as a major component thereof.
    Type: Application
    Filed: November 16, 2006
    Publication date: March 18, 2010
    Applicant: SUMITOMO BAKELITE COMPANY LIMITED
    Inventors: Koji Choki, Tetsuya Mori, Keizo Takahama, Makoto Fujiwara, Kei Watanabe, Hiroshi Owari
  • Publication number: 20100061688
    Abstract: Embodiments in accordance with the present invention provide waveguide structures and methods of forming such structures where core and laterally adjacent cladding regions are defined. Some embodiments of the present invention provide waveguide structures where core regions are collectively surrounded by laterally adjacent cladding regions and cladding layers and methods of forming such structures.
    Type: Application
    Filed: September 3, 2009
    Publication date: March 11, 2010
    Applicants: SUMITOMO BAKELITE CO., LTD., PROMERUS, LLC
    Inventors: Koji Choki, Tetsuya Mori, Ramakrishna Ravikiran, Makoto Fujiwara, Keizo Takahama, Kei Watanabe, Hirotaka Nonaka, Yumiko Otake, Andrew Bell, Larry Rhodes, Dino Amoroso, Mutsuhiro Matsuyama
  • Publication number: 20100062378
    Abstract: Embodiments in accordance with the present invention provide waveguide structures and methods of forming such structures where core and laterally adjacent cladding regions are defined. Some embodiments of the present invention provide waveguide structures where core regions are collectively surrounded by laterally adjacent cladding regions and cladding layers and methods of forming such structures.
    Type: Application
    Filed: September 3, 2009
    Publication date: March 11, 2010
    Applicants: SUMITOMO BAKELITE CO., LTD., PROMERUS, LLC
    Inventors: Koji Choki, Tetsuya Mori, Ramakrishna Ravikiran, Makoto Fujiwara, Keizo Takahama, Kei Watanabe, Hirotaka Nonaka, Yumiko Otake, Andrew Bell, Larry Rhodes, Dino Amoroso, Mutsuhiro Matsuyama
  • Publication number: 20090245720
    Abstract: A substrate on which an optical element is mounted is provided, including: an optical element; an optical circuit substrate which is formed by an optical waveguide layer having a core portion and cladding portions; and an electrical circuit substrate on which is provided a mounting portion that is used for mounting the optical element, wherein the optical element is mounted on the electrical circuit substrate via the optical circuit substrate and wherein the optical circuit substrate has an optical element mounted thereon and is provided with a receptor structure having a conductive portion that conducts electricity between an electrode of the optical element and an electrode of the electrical circuit substrate.
    Type: Application
    Filed: May 30, 2007
    Publication date: October 1, 2009
    Applicant: SUMITOMO BAKELITE CO.,LTD.
    Inventors: Koji Choki, Mutsuhiro Matsuyama, Kenji Miyao, Keizo Takahama, Tetsuya Mori, Kei Watanabe, Hiroshi Owari, Yoji Shirato