Patents by Inventor Toyoharu Oohata

Toyoharu Oohata 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: 7129515
    Abstract: Semiconductor light-emitting devices are provided. The semiconductor light-emitting devices include a substrate and a crystal layer selectively grown thereon at least a portion of the crystal layer is oriented along a plane that slants to or diagonally intersect a principal plane of orientation associated with the substrate thereby for example, enhancing crystal properties, preventing threading dislocations, and facilitating device miniaturization and separation during manufacturing and use thereof.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: October 31, 2006
    Assignee: Sony Corporation
    Inventors: Hiroyuki Okuyama, Masato Doi, Goshi Biwa, Toyoharu Oohata, Tomoyuki Kikutani
  • Patent number: 7129514
    Abstract: Semiconductor light-emitting devices are provided. The semiconductor light-emitting devices include a substrate and a crystal layer selectively grown thereon at least a portion of the crystal layer is oriented along a plane that slants to or diagonally intersect a principal plane of orientation associated with the substrate thereby for example, enhancing crystal properties, preventing threading dislocations, and facilitating device miniaturization and separation during manufacturing and use thereof.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: October 31, 2006
    Assignee: Sony Corporation
    Inventors: Hiroyuki Okuyama, Masato Doi, Goshi Biwa, Toyoharu Oohata, Tomoyuki Kikutani
  • Patent number: 7129107
    Abstract: Semiconductor light-emitting devices are provided. The semiconductor light-emitting devices include a substrate and a crystal layer selectively grown thereon at least a portion of the crystal layer is oriented along a plane that slants to or diagonally intersect a principal plane of orientation associated with the substrate thereby for example, enhancing crystal properties, preventing threading dislocations, and facilitating device miniaturization and separation during manufacturing and use thereof.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: October 31, 2006
    Assignee: Sony Corporation
    Inventors: Hiroyuki Okuyama, Masato Doi, Goshi Biwa, Toyoharu Oohata, Tomoyuki Kikutani
  • Publication number: 20060240578
    Abstract: A method of repairing a defective one of devices mounted on substrate is provided. Devices are arrayed on a substrate and electrically connected to wiring lines connected to a drive circuit, to be thus mounted on the substrate. The devices mounted on the substrate are then subjected to an emission test. If a defective device is detected in this test, a repair device is mounted at a position corresponding to a position of the defective device. At this time, after wiring lines connected to the defective device are cut off, the repair device is electrically connected to portions of the wiring lines, the portions of the wiring lines being located at positions nearer to the drive circuit side than the cut-off positions of the wiring lines.
    Type: Application
    Filed: June 14, 2006
    Publication date: October 26, 2006
    Applicant: SONY CORPORATION
    Inventors: Toyoharu Oohata, Toshiaki Iwafuchi, Hisashi Ohba
  • Patent number: 7122825
    Abstract: Semiconductor light-emitting devices are provided. The semiconductor light-emitting devices include a substrate and a crystal layer selectively grown thereon at least a portion of the crystal layer is oriented along a plane that slants to or diagonally intersect a principal plane of orientation associated with the substrate thereby for example, enhancing crystal properties, preventing threading dislocations, and facilitating device miniaturization and separation during manufacturing and use thereof.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: October 17, 2006
    Assignee: Sony Corporation
    Inventors: Hiroyuki Okuyama, Masato Doi, Goshi Biwa, Toyoharu Oohata, Tomoyuki Kikutani
  • Patent number: 7122826
    Abstract: Semiconductor light-emitting devices are provided. The semiconductor light-emitting devices include a substrate and a crystal layer selectively grown thereon at least a portion of the crystal layer is oriented along a plane that slants to or diagonally intersect a principal plane of orientation associated with the substrate thereby for example, enhancing crystal properties, preventing threading dislocations, and facilitating device miniaturization and separation during manufacturing and use thereof.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: October 17, 2006
    Assignee: Sony Corporation
    Inventors: Hiroyuki Okuyama, Masato Doi, Goshi Biwa, Toyoharu Oohata, Tomoyuki Kikutani
  • Patent number: 7122394
    Abstract: Semiconductor light-emitting devices are provided. The semiconductor light-emitting devices include a substrate and a crystal layer selectively grown thereon at least a portion of the crystal layer is oriented along a plane that slants to or diagonally intersect a principal plane of orientation associated with the substrate thereby for example, enhancing crystal properties, preventing threading dislocations, and facilitating device miniaturization and separation during manufacturing and use thereof.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: October 17, 2006
    Assignee: Sony Corporation
    Inventors: Hiroyuki Okuyama, Masato Doi, Goshi Biwa, Toyoharu Oohata, Tomoyuki Kikutani
  • Publication number: 20060202213
    Abstract: A method of repairing a defective one of devices mounted on substrate is provided. Devices are arrayed on a substrate and electrically connected to wiring lines connected to a drive circuit, to be thus mounted on the substrate. The devices mounted on the substrate are then subjected to an emission test. If a defective device is detected in this test, a repair device is mounted at a position corresponding to a position of the defective device. At this time, after wiring lines connected to the defective device are cut off, the repair device is electrically connected to portions of the wiring lines, the portions of the wiring lines being located at positions nearer to the drive circuit side than the cut-off positions of the wiring lines.
    Type: Application
    Filed: May 25, 2006
    Publication date: September 14, 2006
    Applicant: SONY CORPORATION
    Inventors: Toyoharu Oohata, Toshiaki Iwafuchi, Hisashi Ohba
  • Patent number: 7091525
    Abstract: A display device is formed by burying at least part of a light emitting device in an insulating material, wherein a drive electrode for the light emitting device is formed so as to be extracted on a surface of the insulating material. A display unit is produced by two-dimensionally arraying such light emitting devices on a base body. Since the display device is modularized by burying a light emitting device finely formed in an insulating material, to re-shape the light emitting device into a size easy to handle, it is possible to suppress the production cost of the display unit using such display devices, and to ensure a desirable handling performance of the light emitting device; for example, facilitate the carrying of the light emitting device or the mounting thereof on a base body.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: August 15, 2006
    Assignee: Sony Corporation
    Inventors: Toyoharu Oohata, Hideharu Nakajima, Yoshiyuki Yanagisawa, Toshiaki Iwafuchi
  • Patent number: 7087934
    Abstract: A semiconductor light emitting device includes a crystal growth layer, and a crystal layer composed of a first conductive type layer, an active layer, and a second conductive type layer. The crystal layer is provided on the upper side of the crystal growth layer. In this device, a back plane of the crystal growth layer has irregularities. Since light generated in the device is prevented from being totally reflected from the back plane of the crystal growth layer, the light emergence efficiency of the device can be increased.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: August 8, 2006
    Assignee: Sony Corporation
    Inventors: Toyoharu Oohata, Masato Doi
  • Patent number: 7087932
    Abstract: A semiconductor light-emitting element is provided which has a structure that does not complicate a fabrication process, can be formed in high precision and does not invite any degradation of crystallinity. A light-emitting element is formed, which includes a selective crystal growth layer formed by selectively growing a compound semiconductor of a Wurtzite type, a clad layer of a first conduction type, an active layer and a clad layer of a second conduction type, which are formed on the selective crystal growth layer wherein the active layer is formed so that the active layer extends in parallel to different crystal planes, the active layer is larger in size than a diffusion length of a constituent atom of a mixed crystal, or the active layer has a difference in at least one of a composition and a thickness thereof, thereby forming the active layer having a number of light-emitting wavelength regions whose emission wavelengths differ from one another.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: August 8, 2006
    Assignee: Sony Corporation
    Inventors: Hiroyuki Okuyama, Masato Doi, Goshi Biwa, Toyoharu Oohata
  • Publication number: 20060096524
    Abstract: Methods of crystal growth for semiconductor materials, such as nitride semiconductors, and methods of manufacturing semiconductor devices are provided. The method of crystal growth includes forming a number of island crystal regions during a first crystal growth phase and continuing growth of the island crystal regions during a second crystal growth phase while bonding of boundaries of the island crystal regions occurs. The second crystal growth phase can include a crystal growth rate that is higher than the crystal growth rate of the first crystal growth phase and/or a temperature that is lower than the first crystal growth phase. This can reduce the density of dislocations, thereby improving the performance and service life of a semiconductor device which is formed on a nitride semiconductor made in accordance with an embodiment of the present invention.
    Type: Application
    Filed: December 19, 2005
    Publication date: May 11, 2006
    Inventors: Goshi Biwa, Hiroyuki Okuyama, Masato Doi, Toyoharu Oohata
  • Patent number: 7033436
    Abstract: Methods of crystal growth for semiconductor materials, such as nitride semiconductors, and methods of manufacturing semiconductor devices are provided. The method of crystal growth includes forming a number of island crystal regions during a first crystal growth phase and continuing growth of the island crystal regions during a second crystal growth phase while bonding of boundaries of the island crystal regions occurs. The second crystal growth phase can include a crystal growth rate that is higher than the crystal growth rate of the first crystal growth phase and/or a temperature that is lower than the first crystal growth phase. This can reduce the density of dislocations, thereby improving the performance and service life of a semiconductor device which is formed on a nitride semiconductor made in accordance with an embodiment of the present invention.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: April 25, 2006
    Assignee: Sony Corporation
    Inventors: Goshi Biwa, Hiroyuki Okuyama, Masato Doi, Toyoharu Oohata
  • Patent number: 7030421
    Abstract: Semiconductor light emitting devices and methods of producing same are provided. The semiconductor light emitting devices include a substrate that has a surface including a difference-in-height portion composed of, for example, a wurtzite compound. A crystal growth layer is formed in the substrate surface wherein at least a portion of which is oriented along an inclined plane with respect to a principal plane of the substrate. The semiconductor device includes a first conductive layer, an active layer and a second conductive layer formed on the crystal layer in a stacked arrangement and oriented along the inclined place.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: April 18, 2006
    Assignee: Sony Corporation
    Inventors: Hiroyuki Okuyama, Masato Doi, Goshi Biwa, Toyoharu Oohata
  • Patent number: 7015055
    Abstract: A first adhesive layer is provided on a base substrate, and multiple devices are arranged on the first adhesive layer. The first adhesive layer is irradiated with laser light from the back side of the base substrate, only at positions corresponding to the devices to be transferred, by use of a mask, whereby the adhesive force of the first adhesive layer is lowered only at these positions, and only these devices are made releasable from the base substrate. A transfer substrate provided with a second adhesive layer and the base substrate are so disposed that the devices and the second adhesive layer are opposite to each other and pressed against each other. When the transfer substrate is stripped from the base substrate, only the devices to be transferred are selectively transferred onto the transfer substrate.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: March 21, 2006
    Assignee: Sony Corporation
    Inventors: Toyoharu Oohata, Toshiaki Iwafuchi, Hisashi Ohba
  • Patent number: 7009220
    Abstract: A semiconductor crystal layer formed by epitaxial growth on a seed crystal substrate is embedded in an insulating material in the condition where the seed crystal substrate is removed, electrodes are provided respectively on a first surface of the semiconductor crystal layer and a second surface of the semiconductor layer opposite to the first surface, and lead-out electrodes connected to the electrodes are led out to the same surface side of the insulating material. The semiconductor crystal layer functions as a semiconductor light-emitting device or a semiconductor electronic device. The insulating material is, for example, a resin.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: March 7, 2006
    Assignee: Sony Corporation
    Inventor: Toyoharu Oohata
  • Patent number: 7002183
    Abstract: Semiconductor light emitting devices are provided. The semiconductor light emitting device includes a base body, a selection mask having a stripe-shaped opening portion, the selection mask being formed on the base body, a semiconductor layer formed by selective growth from the opening portion in such a manner as to have a ridge line substantially parallel to long-sides of the opening portion, and a first conductive type cladding layer, an active layer, and a second conductive type cladding layer, which are formed on the semiconductor layer.
    Type: Grant
    Filed: March 9, 2005
    Date of Patent: February 21, 2006
    Assignee: Sony Corporation
    Inventors: Hiroyuki Okuyama, Masato Doi, Goshi Biwa, Toyoharu Oohata
  • Patent number: 7002721
    Abstract: The invention provides an electrochromic display unit with high-quality display. The display unit comprises a transparent electrode (1), a display layer (2) which is formed on the transparent electrode (1) and which changes a color according to the amount of accumulated electrical charges, and an ion conductive layer (3) formed on the display layer (2). A plurality of picture electrodes (4) are formed on the ion conductive layer (3) on the side opposite to the display layer (2). The picture electrodes (4) are driven independently by, for example, a corresponding thin film transistors (6). In driving, by applying a drive current having given amount of electrical charges and then applying a certain amount of an inverted current, a certain amount of coloration is deducted, and extra coloration of the display layer (2) is eliminated.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: February 21, 2006
    Assignee: Sony Corporation
    Inventors: Michio Arai, Eriko Matsui, Kenji Shinozaki, Toyoharu Oohata
  • Patent number: 6998645
    Abstract: Semiconductor light emitting devices are provided. The semiconductor light emitting device includes a base body, a selection mask having a stripe-shaped opening portion, the selection mask being formed on the base body, a semiconductor layer formed by selective growth from the opening portion in such a manner as to have a ridge line substantially parallel to long-sides of the opening portion, and a first conductive type cladding layer, an active layer, and a second conductive type cladding layer, which are formed on the semiconductor layer.
    Type: Grant
    Filed: March 9, 2005
    Date of Patent: February 14, 2006
    Assignee: Sony Corporation
    Inventors: Hiroyuki Okuyama, Masato Doi, Goshi Biwa, Toyoharu Oohata
  • Publication number: 20060007297
    Abstract: A device transfer method is provided. The device transfer method is disclosed by which, when a laser ablation technique is used to selectively exfoliate devices arranged on a substrate, the energy is transmitted efficiently to transfer the devices with a high degree of accuracy and at a high speed. A laser irradiation apparatus is used which includes a laser light source for generating a laser beam, a reflection section for reflecting the laser beam toward a required direction, and a control section for controlling whether or not the laser beam is to be irradiated in an interlocking relationship with the reflection section. The laser beam is selectively irradiated on a plurality of devices arranged on a transfer source substrate to cause laser ablation such that the selected devices are transferred to a transfer destination substrate by the selective laser ablation.
    Type: Application
    Filed: June 22, 2005
    Publication date: January 12, 2006
    Inventors: Masato Doi, Toyoharu Oohata