Patents by Inventor Koji Asakawa

Koji Asakawa 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: 20120041121
    Abstract: A pattern forming material contains a block copolymer or graft copolymer and forms a structure having micro polymer phases, in which, with respect to at least two polymer chains among polymer chains constituting the block copolymer or graft copolymer, the ratio between N/(Nc?No) values of monomer units constituting respective polymer chains is 1.4 or more, where N represents total number of atoms in the monomer unit, Nc represents the number of carbon atoms in the monomer unit, No represents the number of oxygen atoms in the monomer unit.
    Type: Application
    Filed: October 21, 2011
    Publication date: February 16, 2012
    Inventors: Koji ASAKAWA, Toshiro Hiraoka, Yoshihiro Akasaka, Yasuyuki Hotta
  • Publication number: 20120037594
    Abstract: A pattern forming material contains a block copolymer or graft copolymer and forms a structure having micro polymer phases, in which, with respect to at least two polymer chains among polymer chains constituting the block copolymer or graft copolymer, the ratio between N/(Nc?No) values of monomer units constituting respective polymer chains is 1.4 or more, where N represents total number of atoms in the monomer unit, Nc represents the number of carbon atoms in the monomer unit, No represents the number of oxygen atoms in the monomer unit.
    Type: Application
    Filed: October 21, 2011
    Publication date: February 16, 2012
    Inventors: Koji ASAKAWA, Toshiro Hiraoka, Yoshihiro Akasaka, Yasuyuki Hotta
  • Publication number: 20120037595
    Abstract: A pattern forming material contains a block copolymer or graft copolymer and forms a structure having micro polymer phases, in which, with respect to at least two polymer chains among polymer chains constituting the block copolymer or graft copolymer, the ratio between N/(Nc-No) values of monomer units constituting respective polymer chains is 1.4 or more, where N represents total number of atoms in the monomer unit, Nc represents the number of carbon atoms in the monomer unit, No represents the number of oxygen atoms in the monomer unit.
    Type: Application
    Filed: October 21, 2011
    Publication date: February 16, 2012
    Inventors: Koji ASAKAWA, Toshiro Hiraoka, Yoshihiro Akasaka, Yasuyuki Hotta
  • Patent number: 8101964
    Abstract: The present invention provides a semiconductor light-emitting element comprising an electrode part excellent in ohmic contact and capable of emitting light from the whole surface. An electrode layer placed on the light-extraction side comprises a metal part and plural openings. The metal part is so continuous that any pair of point-positions in the part is continuously connected without breaks, and the metal part in 95% or more of the whole area continues linearly without breaks by the openings in a straight distance of not more than ? of the wavelength of light emitted from an active layer. The average opening diameter is of 10 nm to ? of the wavelength of emitted light. The electrode layer has a thickness of 10 nm to 200 nm, and is in good ohmic contact with a semiconductor layer.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: January 24, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ryota Kitagawa, Koji Asakawa, Akira Fujimoto, Tsutomu Nakanishi, Eishi Tsutsumi
  • Patent number: 8089081
    Abstract: A semiconductor light emitting device including: a substrate; an electrode layer; and a semiconductor multilayer film disposed between the substrate and the electrode layer, the semiconductor multilayer film including: an n-type semiconductor layer; a p-type semiconductor layer; and an active layer disposed between the n-type semiconductor layer and the p-type semiconductor layer, wherein the semiconductor multilayer film has a light extraction surface from which a light emitted in the semiconductor multilayer film is extracted, the light extraction surface being formed with a relief structure having nano-scaled convex portions, wherein the relief structure is formed to have variation in equivalent circular diameters of the convex portions, and wherein 90% or more of the convex portions in the relief structure are configured to have circularity coefficient of (4?×(area)/(circumferential length)2) being equal to or larger than 0.7.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: January 3, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ryota Kitagawa, Akira Fujimoto, Koji Asakawa, Takeyuki Suzuki
  • Patent number: 8043520
    Abstract: A pattern forming material contains a block copolymer or graft copolymer and forms a structure having micro polymer phases, in which, with respect to at least two polymer chains among polymer chains constituting the block copolymer or graft copolymer, the ratio between N/(Nc?No) values of monomer units constituting respective polymer chains is 1.4 or more, where N represents total number of atoms in the monomer unit, Nc represents the number of carbon atoms in the monomer unit, No represents the number of oxygen atoms in the monomer unit.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: October 25, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Asakawa, Toshiro Hiraoka, Yoshihiro Akasaka, Yasuyuki Hotta
  • Publication number: 20110240111
    Abstract: According to one embodiment, a carbon nanotube assembly includes a plurality of carbon nanotubes having a length of 10 ?m or less in a major axis direction assembled with a space filling rate of 30% or more.
    Type: Application
    Filed: September 10, 2010
    Publication date: October 6, 2011
    Inventors: Yuichi Yamazaki, Tadashi Sakai, Koji Asakawa
  • Publication number: 20110220976
    Abstract: Certain embodiments provide a solid-state imaging device including: a semiconductor substrate of a first conductivity type having a first face and a second face that is the opposite side from the first face; a plurality of pixels provided on the first face of the semiconductor substrate, each of the pixels including a semiconductor region of a second conductivity type that converts incident light into signal charges, and stores the signal charges; a readout circuit provided on the second face of the semiconductor substrate to read the signal charges stored in the pixels; an ultrafine metal structure placed at intervals on a face on a side of the semiconductor region, the light being incident on the face; and an insulating layer provided between the ultrafine metal structure and the semiconductor region.
    Type: Application
    Filed: September 3, 2010
    Publication date: September 15, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshinori IIDA, Eishi Tsutsumi, Akira Fujimoto, Koji Asakawa, Hisayo Momose, Koichi Kokubun, Nobuyuki Momo
  • Publication number: 20110220936
    Abstract: A semiconductor light-emitting device according to the embodiment includes a substrate, a compound semiconductor layer, a metal electrode layer provided with particular openings, a light-extraction layer, and a counter electrode. The light-extraction layer has a thickness of 20 to 120 nm and covers at least partly the metal part of the metal electrode layer; or otherwise the light-extraction layer has a rugged structure and covers at least partly the metal part of the metal electrode layer. The rugged structure has projections so arranged that their summits are positioned at intervals of 100 to 600 nm, and the heights of the summits from the surface of the metal electrode layer are 200 to 700 nm.
    Type: Application
    Filed: September 7, 2010
    Publication date: September 15, 2011
    Inventors: Akira Fujimoto, Ryota Kitagawa, Eishi Tsutsumi, Koji Asakawa
  • Patent number: 7928353
    Abstract: The Present invention provides an organic EL display and a lighting device having high efficiency. The organic EL display comprises a substrate, a pixel-driving circuit unit, and pixels arranged in the form of a matrix on the substrate. The pixel comprises a light-emitting part, and the light-emitting part is composed of a first electrode placed near to the substrate, a second electrode placed far from the substrate, and at least one organic layer placed between the first and second electrodes. The second electrode has a metal electrode layer having a thickness of 10 nm to 200 nm, and the metal electrode layer comprises a metal part and plural openings penetrating through the layer. The metal part is seamless and formed of metal continuously connected without breaks between any points therein.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: April 19, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akira Fujimoto, Koji Asakawa, Tsutomu Nakanishi, Eishi Tsutsumi, Ryota Kitagawa
  • Publication number: 20110049556
    Abstract: The present invention provides a semiconductor light-emitting device capable of keeping high luminance intensity even if electric power increases, and hence the device is suitable for lighting instruments such as lights and lamps. This semiconductor device comprises a metal electrode layer provided with openings, and is so large in size that the electrode layer has, for example, an area of 1 mm2 or more. The openings have a mean diameter of 10 nm to 2 ?m, and they penetrate through the metal electrode layer. That metal electrode layer can be produced by use of self-assembling of block copolymer or by nano-imprinting techniques.
    Type: Application
    Filed: February 25, 2010
    Publication date: March 3, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akira FUJIMOTO, Ryota Kitagawa, Koji Asakawa
  • Publication number: 20100327804
    Abstract: A chargeable electric device includes a rechargeable battery. A secondary coil is arranged to be coupled by electromagnetic induction to a primary coil of a non-contact charger when charging the rechargeable battery. A resonance capacitor is connected to the secondary coil. A rectification unit is connected to the secondary coil. A charging current control unit arranged between the rectification unit and the rechargeable battery control charging current supplied from the rectification unit to the rechargeable battery. A resonance obstruction element obstructs normal resonance produced by the secondary coil and the resonance capacitor in synchronism with the control performed by the charging current control unit to suppress the charging current.
    Type: Application
    Filed: June 21, 2010
    Publication date: December 30, 2010
    Applicant: PANASONIC ELECTRIC WORKS CO., LTD.
    Inventors: Atsushi Takahashi, Mikihiro Yamashita, Koji Asakawa, Yoshinori Katsura
  • Patent number: 7851564
    Abstract: A silicone resin composition is provided, which includes an alkenyl group-containing polysiloxane represented by the following average composition formula (PSA(1)), a hydro group-containing polysiloxane represented by the following average composition formula (PSA(2)), two kinds of polysiloxane, both having opposite ends sealed with a vinyl group, which are represented by the following formulas (PSC(1) and PSC(4)), and a hydrosilylating catalyst:
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: December 14, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinji Murai, Koji Asakawa
  • Patent number: 7823808
    Abstract: An electrostatic spraying device having a removable cartridge with a reservoir containing a volume of liquid compositions to be electrically sprayed on a user's skin. The device includes a nozzle for dispensing the liquid as well as an emitter electrode disposed adjacent to the nozzle for charging the liquid composition just being dispensed from the nozzle. A field electrode surrounds the reservoir in order to charge the liquid composition within the reservoir, thereby avoiding an occurrence of electric current which would otherwise flow in the liquid composition and would deteriorate the composition remaining in the reservoir. The reservoir is devoid of the field electrode, and therefor can be designed into a simple and compact structure without being restricted by the field electrode, assuring to have an enhanced liquid containing volume in relation to the bulk of the removable cartridge.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: November 2, 2010
    Assignees: Panasonic Electric Works Co., Ltd., The Procter & Gamble Company
    Inventors: Naoki Yamaguchi, Koji Asakawa, David Edward Wilson, Shunichi Nagasawa
  • Patent number: 7823809
    Abstract: An electrostatic spraying device has a capability of confirming that the device is ready for making an electrostatic spraying of the liquid composition on a user's skin. The device includes a nozzle and a pump for dispensing the liquid composition out through the nozzle. An emitter electrode is disposed to electrostatically charge the liquid composition being dispensed for making the electrostatic spraying. The device is provided with a power switch and a selector for selection between a spraying mode and a dripping mode. In the dripping mode, the pump is alone actuated to dispense the liquid composition absent electrostatic charge. In the spraying mode, both of the pump and the emitter electrode are activated to make the electrostatic spraying. Thus, the user can be easy to drip the liquid composition by simply manipulating the selector prior to initiating the electrostatic spraying.
    Type: Grant
    Filed: November 26, 2004
    Date of Patent: November 2, 2010
    Assignees: Panasonic Electric Works Co., Ltd., The Procter & Gamble Company
    Inventors: Naoki Yamaguchi, Koji Asakawa, David Edward Wilson, Kazumi Toyama, Meei-Lih Lin
  • Publication number: 20100236619
    Abstract: The present invention provides a light transmission type solar cell excellent in both power generation efficiency and light transparency, and also provides a method for producing that solar cell. The solar cell of the present invention comprises a photoelectric conversion layer, a light-incident side electrode layer, and a counter electrode layer. The incident side electrode layer is provided with plural openings bored through the layer, and has a thickness of 10 nm to 200 nm. Each of the openings occupies an area of 80 nm2 to 0.8 ?m2, and the opening ratio is in the range of 10% to 66%. The transmittance of the whole cell is 5% or more at 700 nm wavelength. The incident side electrode layer can be formed by etching fabrication with a stamper. In the etching fabrication, a mono-particle layer of fine particles or a dot pattern formed by self-assembled block copolymer can be used as a mask.
    Type: Application
    Filed: February 4, 2010
    Publication date: September 23, 2010
    Applicant: KABUSHI KAISHA TOSHIBA
    Inventors: Eishi TSUTSUMI, Kumi Masunaga, Ryota Kitagawa, Tsutomu Nakanishi, Akira Fujimoto, Hideyuki Nishizawa, Koji Asakawa
  • Publication number: 20100236620
    Abstract: According to one aspect of the present invention, there is provided a thin film solar cell comprising a substrate, a photoelectric conversion layer formed on said substrate, said photoelectric conversion layer having a thickness of 1 ?m or less, and said photoelectric conversion layer comprising a p-type semiconductor layer, an n-type semiconductor layer, and are i-type semiconductor layer placed between said p-type semiconductor layer and said n-type semiconductor layer, a light-incident side electrode layer formed on a light-incident surface of said photoelectric conversion layer and a counter electrode layer formed on the surface opposite to the light-incident surface. Said light-incident side electrode layer has plural openings bored though said layer, and the thickness thereof is in the range of 10 nm to 200 nm. Each of said openings occupies an area of 80 nm2 to 0.8 ?m2. The opening ratio is in the range of 10% to 66%.
    Type: Application
    Filed: February 16, 2010
    Publication date: September 23, 2010
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tsutomu NAKANISHI, Eishi Tsutsumi, Akira Fujimoto, Kumi Masunaga, Ryota Kitagawa, Koji Asakawa, Hideyuki Nishizawa
  • Publication number: 20100221856
    Abstract: One aspect of the present invention provides a semiconductor light-emitting device improved in luminance, and also provides a process for production thereof. The process comprises a procedure of forming a relief structure on the light-extraction surface of the device by use of a self-assembled film. In that procedure, the light-extraction surface is partly covered with a protective film so as to protect an area for an electrode to be formed therein. The electrode is then finally formed there after the procedure. The process thus reduces the area incapable, due to thickness of the electrode, of being provided with the relief structure. Between the electrode and the light-extraction surface, a contact layer is formed so as to establish ohmic contact between them.
    Type: Application
    Filed: March 4, 2010
    Publication date: September 2, 2010
    Inventors: Akira Fujimoto, Ryota Kitagawa, Koji Asakawa, Hidefumi Yasuda, Yasuhiko Akaike, Takeyuki Suzuki
  • Publication number: 20100220757
    Abstract: One embodiment of the present invention provides a semiconductor light-emitting element having both high light-extraction efficiency and excellent adhesion between a light-extraction surface and a sealing resin, and it also provides a process for production thereof. This element comprises a semiconductor multilayered film and a light-extraction surface. In the multilayered film, plural semiconductor layers and an active layer are stacked. The light-extraction surface is provided on the multilayered film, and plural micro-projections are formed thereon. These micro-projections have flat top faces parallel to the multilayered film, and they can be formed by an etching process. The etching process is performed by use of a dot pattern as a mask, and the dot pattern is formed by phase separation of a block copolymer.
    Type: Application
    Filed: March 4, 2010
    Publication date: September 2, 2010
    Inventors: Ryota KITAGAWA, Akira FUJIMOTO, Koji ASAKAWA
  • Patent number: 7786665
    Abstract: An organic electroluminescent device is provided, which includes an emission portion comprising a first electrode and a second electrode and an organic layer sandwiched between the first and second electrodes, and a diffraction grating disposed neighboring on the emission portion, the diffraction grating having first regions and a second region, the first regions comprising a plurality of pair of recessed and projected portions, the plurality of pair of recessed and projected portions being periodically arranged and provided with a primitive translation vector of a direction, the second region comprising an aggregate of the first regions and located parallel with an emission surface of the organic electroluminescent device.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: August 31, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsutomu Nakanishi, Toshiro Hiraoka, Akira Fujimoto, Koji Asakawa, Satoshi Saito