Patents by Inventor Tomohiko Sagimori

Tomohiko Sagimori 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: 9214597
    Abstract: A method for manufacturing a semiconductor device, includes: a step of etching a Si (111) substrate along a (111) plane of the Si (111) substrate to separate a Si (111) thin-film device having a separated surface along the (111) plane.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: December 15, 2015
    Assignee: Oki Data Corporation
    Inventors: Mitsuhiko Ogihara, Tomohiko Sagimori, Takahito Suzuki, Masataka Muto
  • Patent number: 8816364
    Abstract: The present invention supplied a display apparatus using plastic substrate instead of glass substrate, which can solve such problems that the plastic substrate has a low heat conductivity and its heat release performance becomes bad so that it is difficult to obtain stable performance and reliability. In the display apparatus being formed by bonding semiconductor thin film element on a plastic substrate, a thin film metal layer is formed on surface of the semiconductor thin film element for promoting heat release.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: August 26, 2014
    Assignee: Oki Data Corporation
    Inventors: Takahito Suzuki, Tomohiko Sagimori, Hiroyuki Fujiwara, Tomoki Igari, Yusuke Nakai, Hironori Furuta, Mitsuhiko Ogihara
  • Patent number: 8748918
    Abstract: A semiconductor device includes a diamond-like carbon film formed on the substrate. A thin film is formed on the diamond-like carbon film. The thin film has a thickness thinner than the diamond-like carbon. A semiconductor thin film having a semiconductor element is bonded onto the thin film.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: June 10, 2014
    Assignee: Oki Data Corporation
    Inventors: Mitsuhiko Ogihara, Tomohiko Sagimori, Masaaki Sakuta
  • Patent number: 8664672
    Abstract: A light emitting panel includes a plurality of light emitting element arrays each of which has a plurality of light emitting elements arranged in a plane. The light emitting element arrays are configured so that an arrangement plane of the light emitting elements of one light emitting element array is overlapped with another arrangement plane of the light emitting elements of another light emitting element array in substantially parallel to each other, and so that the light emitting elements of one light emitting element array and the light emitting elements of another light emitting element array emit lights to the same side.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: March 4, 2014
    Assignee: Oki Data Corporation
    Inventors: Mitsuhiko Ogihara, Takahito Suzuki, Tomoki Igari, Hiroyuki Fujiwara, Tomohiko Sagimori, Hironori Furuta, Yusuke Nakai
  • Publication number: 20130264605
    Abstract: A method for manufacturing a semiconductor device, includes: a step of etching a Si (111) substrate along a (111) plane of the Si (111) substrate to separate a Si (111) thin-film device having a separated surface along the (111) plane.
    Type: Application
    Filed: June 6, 2013
    Publication date: October 10, 2013
    Inventors: Mitsuhiko OGIHARA, Tomohiko SAGIMORI, Takahito SUZUKI, Masataka MUTO
  • Patent number: 8524366
    Abstract: A method is used for releasing a graphene layer from a substrate. A graphene layer is first formed on a surface of a first substrate. A metal layer is then formed on a surface of the graphene layer. A pulling force is then applied to the metal layer to detach the graphene layer from the first substrate. The released graphene layer is bonded by intermolecular force onto a surface of a second substrate separate from the first substrate or onto a surface of a bonding layer formed on the surface of the second substrate. The metal layer is then removed, by for example, etching.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: September 3, 2013
    Assignee: Oki Data Corporation
    Inventors: Mitsuhiko Ogihara, Tomohiko Sagimori, Masaaki Sakuta, Akihiro Hashimoto, Satoru Tanaka
  • Patent number: 8481342
    Abstract: A method for manufacturing a semiconductor device, includes: a step of etching a Si (111) substrate along a (111) plane of the Si (111) substrate to separate a Si (111) thin-film device having a separated surface along the (111) plane.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: July 9, 2013
    Assignee: Oki Data Corporation
    Inventors: Mitsuhiko Ogihara, Tomohiko Sagimori, Takahito Suzuki, Masataka Muto
  • Patent number: 8409366
    Abstract: In a separation method of a nitride semiconductor layer, a graphene layer in the form of a single layer or two or more layers is formed on a surface of a first substrate. A nitride semiconductor layer is formed on the graphene layer so that the nitride semiconductor layer is bonded to the graphene layer with a bonding force due to regularity of potential at atomic level at an interface therebetween without utilizing covalent bonding. The nitride semiconductor layer is separated from the first substrate with a force which is greater than the bonding force between the nitride semiconductor layer and the graphene layer, or greater than a bonding force between respective layers of the graphene layer.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: April 2, 2013
    Assignee: Oki Data Corporation
    Inventors: Mitsuhiko Ogihara, Tomohiko Sagimori, Masaaki Sakuta, Akihiro Hashimoto
  • Publication number: 20120286303
    Abstract: The present invention supplied a display apparatus using plastic substrate instead of glass substrate, which can solve such problems that the plastic substrate has a low heat conductivity and its heat release performance becomes bad so that it is difficult to obtain stable performance and reliability. In the display apparatus being formed by bonding semiconductor thin film element on a plastic substrate, a thin film metal layer is formed on surface of the semiconductor thin film element for promoting heat release.
    Type: Application
    Filed: July 23, 2012
    Publication date: November 15, 2012
    Applicant: Oki Data Corporation
    Inventors: Takahito SUZUKI, Tomohiko SAGIMORI, Hiroyuki FUJIWARA, Tomoki IGARI, Yusuke NAKAI, Hironori FURUTA, Mitsuhiko OGIHARA
  • Patent number: 8269314
    Abstract: The present invention supplied a display apparatus using plastic substrate instead of glass substrate, which can solve such problems that the plastic substrate has a low heat conductivity and its heat release performance becomes bad so that it is difficult to obtain stable performance and reliability. In the display apparatus, inner surface electrode integrated with vertical wiring between plastic substrate and thin film LED 102 is accumulated, the inner surface electrode acts as a heat release layer for releasing heat produced inside the thin film LED 102.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: September 18, 2012
    Assignee: Oki Data Corporation
    Inventors: Takahito Suzuki, Tomohiko Sagimori, Hiroyuki Fujiwara, Tomoki Igari, Yusuke Nakai, Hironori Furuta, Mitsuhiko Ogihara
  • Patent number: 8258537
    Abstract: Provided is a technique of effectively extracting the beams of light excited in an LED light emitter other than the light beams emitted from a light-emitting region in the direction of a light-extraction surface. A pit with a tapered sidewall is formed in a substrate. A thin-film semiconductor element is attached to the pit. Light beams emitted from a side surface of the thin-film semiconductor element are reflected by the sidewall of the thin-film semiconductor element. Achieved thereby is effective extraction of light beams other than the light beams emitted from the light-emitting region in the direction of the light-extraction surface.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: September 4, 2012
    Assignee: Oki Data Corporation
    Inventors: Tomoki Igari, Tomohiko Sagimori, Mitsuhiko Ogihara, Takahito Suzuki, Hiroyuki Fujiwara, Hironori Furuta, Yusuke Nakai
  • Patent number: 8134164
    Abstract: A semiconductor device and an optical print head, an image forming apparatus that has the semiconductor device are supplied capable of reduce occurrence probability of defect. The semiconductor device is formed by using semiconductor thin film bonded on the substrate, and includes a covering layer that covers at least one part region of the semiconductor thin film and covers at least one part of electroconductive member connecting with the semiconductor thin film.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: March 13, 2012
    Assignee: Oki Data Corporation
    Inventors: Mitsuhiko Ogihara, Hiroyuki Fujiwara, Tomohiko Sagimori
  • Patent number: 8022418
    Abstract: A composite semiconductor device includes a plurality of semiconductor thin films and a substrate on which the semiconductor thin films are attached. Each semiconductor thin film includes a plurality of semiconductor elements. Each semiconductor element includes a first contact region and a second contact region. The first contact region is connected to a first electrode, and the second contact region is connected to a second electrode. The semiconductor thin film is attached to a substrate such that the plurality of semiconductor elements are aligned in a row, and such that the first contact region and the second contact region are in the row of light emitting elements.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: September 20, 2011
    Assignee: Oki Data Corporation
    Inventors: Tomohiko Sagimori, Hiroyuki Fujiwara, Mitsuhiko Ogihara, Takahito Suzuki
  • Patent number: 7999275
    Abstract: A composite semiconductor device includes a semiconductor thin film, a substrate, connection pads, and a light blocking layer. The semiconductor thin film includes light emitting elements. The driver circuits are formed on the substrate and the semiconductor thin film is fixed on the substrate, the driver circuit driving the light emitting element. The connection pads are formed on the substrate, electrical connection being made through which the connection pads. The light blocking layer is formed in an area between the light emitting element and the connection pad, the light blocking layer. The light blocking layer prevents light emitted from the light emitting element from reaching wires connected to the connection pad.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: August 16, 2011
    Assignee: Oki Data Corporation
    Inventors: Mitsuhiko Ogihara, Hiroyuki Fujiwara, Tomohiko Sagimori, Tomoki Igari
  • Patent number: 7947576
    Abstract: An aspect of the invention provides a method of manufacturing a method of manufacturing a semiconductor element comprises the steps of: growing epitaxially a semiconductor layer on top of a semiconductor substrate; forming a patterned portion of the grown semiconductor layer by forming a pattern by a patterning process on top of the grown semiconductor layer; removing a portion of the semiconductor layer other than the patterned portion by a first etching method with a first etchant; and immersing a resultant from the first etching method in a second etchant that etches only the semiconductor substrate by a second etching method thereby removing the substrate from the semiconductor layer.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: May 24, 2011
    Assignee: Oki Data Corporation
    Inventors: Tomoki Igari, Mitsuhiko Ogihara, Hiroyuki Fujiwara, Hironori Furuta, Takahito Suzuki, Tomohiko Sagimori, Yusuke Nakai
  • Patent number: 7928572
    Abstract: A composite semiconductor device includes a substrate; a plurality of circuits formed on the substrate; one or more wiring layers each including a plurality of wiring patterns connected to circuits of the plurality of circuits, a plurality of dummy patterns electrically isolated from the plurality of circuits, and an interlayer dielectric film that is spin-coated directly onto the wiring patterns and onto the dummy patterns, and that is a spin-coated layer, the dummy patterns being formed in areas where the wiring patterns are absent and lying substantially in a plane in which the wiring patterns lie; and a semiconductor thin film layer including semiconductor device elements and disposed on an upper most surface of the one or more wiring layers. The spin-coated layer may be formed of an organic material or an oxide material.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: April 19, 2011
    Assignee: Oki Data Corporation
    Inventors: Mitsuhiko Ogihara, Hiroyuki Fujiwara, Masataka Muto, Tomohiko Sagimori, Tomoki Igari
  • Publication number: 20100320445
    Abstract: In a separation method of a nitride semiconductor layer, a graphene layer in the form of a single layer or two or more layers is formed on a surface of a first substrate. A nitride semiconductor layer is formed on the graphene layer so that the nitride semiconductor layer is bonded to the graphene layer with a bonding force due to regularity of potential at atomic level at an interface therebetween without utilizing covalent bonding. The nitride semiconductor layer is separated from the first substrate with a force which is greater than the bonding force between the nitride semiconductor layer and the graphene layer, or greater than a bonding force between respective layers of the graphene layer.
    Type: Application
    Filed: June 22, 2010
    Publication date: December 23, 2010
    Applicant: OKI DATA CORPORATION
    Inventors: Mitsuhiko Ogihara, Tomohiko Sagimori, Masaaki Sakuta, Akihiro Hashimoto
  • Publication number: 20100323164
    Abstract: A method is used for releasing a graphene layer from a substrate. A graphene layer is first formed on a surface of a first substrate. A metal layer is then formed on a surface of the graphene layer. A pulling force is then applied to the metal layer to detach the graphene layer from the first substrate. The released graphene layer is bonded by intermolecular force onto a surface of a second substrate separate from the first substrate or onto a surface of a bonding layer formed on the surface of the second substrate. The metal layer is then removed, by for example, etching.
    Type: Application
    Filed: June 22, 2010
    Publication date: December 23, 2010
    Applicant: OKI DATA CORPORATION
    Inventors: Mitsuhiko Ogihara, Tomohiko Sagimori, Masaaki Sakuta, Akihiro Hashimoto, Satoru Tanaka
  • Publication number: 20100244054
    Abstract: A method for manufacturing a semiconductor device, includes: a step of etching a Si (111) substrate along a (111) plane of the Si (111) substrate to separate a Si (111) thin-film device having a separated surface along the (111) plane.
    Type: Application
    Filed: March 24, 2010
    Publication date: September 30, 2010
    Applicant: OKI DATA CORPORATION
    Inventors: Mitsuhiko OGIHARA, Tomohiko SAGIMORI, Takahito SUZUKI, Masataka MUTO
  • Publication number: 20100051979
    Abstract: A semiconductor device includes a diamond-like carbon film formed on the substrate. A thin film is formed on the diamond-like carbon film. The thin film has a thickness thinner than the diamond-like carbon. A semiconductor thin film having a semiconductor element is bonded onto the thin film.
    Type: Application
    Filed: July 31, 2009
    Publication date: March 4, 2010
    Applicant: OKI DATA CORPORATION
    Inventors: Mitsuhiko Ogihara, Tomohiko Sagimori, Masaaki Sakuta