Patents by Inventor Hideyuki Tomizawa

Hideyuki Tomizawa 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: 20140231843
    Abstract: According to one embodiment, a semiconductor light emitting device includes a semiconductor layer, a p-side electrode, an n-side electrode and a fluorescent material layer. The semiconductor layer has a first surface and a second surface on an opposite side to the first surface and includes a light emitting layer. The fluorescent material layer includes a plurality of fluorescent materials and a bonding material integrating the fluorescent materials. The fluorescent material layer includes a lower layer portion provided to spread over the entire first surface and having a larger thickness than a size of the fluorescent materials and an upper layer portion partially provided on the lower layer portion and having a larger thickness and a larger width than a size of the fluorescent materials. The fluorescent materials do not exist on a portion of the lower layer portion not provided with the upper layer portion.
    Type: Application
    Filed: March 21, 2013
    Publication date: August 21, 2014
    Inventors: Yosuke AKIMOTO, Akihiro KOJIMA, Miyoko SHIMADA, Hideyuki TOMIZAWA, Yoshiaki SUGIZAKI, Hideto FURUYAMA
  • Publication number: 20140231842
    Abstract: According to one embodiment, a semiconductor light emitting device includes a semiconductor layer, a first electrode, a second electrode, a first insulating film, a first interconnection layer, a second interconnection layer, a first metal pillar, a second metal pillar, a second insulating film and a fluorescent material layer. The first electrode is provided in an emitting region of the semiconductor layer. The first electrode, the first insulating film, the first interconnection layer, the second interconnection layer, and the second insulating layer are configured to transmit radiated light of the light emitting layer.
    Type: Application
    Filed: March 21, 2013
    Publication date: August 21, 2014
    Inventors: Yosuke AKIMOTO, Akihiro KOJIMA, Miyoko SHIMADA, Hideyuki TOMIZAWA, Yoshiaki SUGIZAKI, Hideto FURUYAMA
  • Publication number: 20140217438
    Abstract: According to one embodiment, a semiconductor light emitting device includes: a semiconductor layer; a first electrode; a first interconnection layer; a second electrode; a second interconnection layer; a support substrate; a bonding layer; a first terminal; and a second terminal. The support substrate has a third face facing the semiconductor layer, the first interconnection layer, and the second interconnection layer and a fourth face opposite to the third face. The support substrate has a first opening extending from the fourth face to the first interconnection layer and a second opening extending from the fourth face to the second interconnection layer. The bonding layer is provided between the support substrate and each of the semiconductor layer, the first interconnection layer, and the second interconnection layer.
    Type: Application
    Filed: March 19, 2013
    Publication date: August 7, 2014
    Inventors: Hideyuki TOMIZAWA, Akihiro KOJIMA, Miyoko SHIMADA, Yosuke AKIMOTO, Yoshiaki SUGIZAKI, Hideto FURUYAMA
  • Publication number: 20140203313
    Abstract: According to one embodiment, a semiconductor light emitting device includes: a mounting substrate; a semiconductor light emitting element; a first resin; and a second resin. The semiconductor light emitting element includes: a semiconductor layer including a light emitting layer; a p-side electrode; a p-side interconnection unit; an n-side electrode; and an n-side interconnection unit. The first resin covers a periphery of the semiconductor light emitting element on the substrate and contains a phosphorescent substance capable of being excited by emission light of the light emitting layer. The second resin is provided on the first resin layer and the semiconductor light emitting element and contains a fluorescent body capable of being excited by emission light of the light emitting layer to emit light of a different peak wavelength from emission light of the light emitting layer.
    Type: Application
    Filed: March 20, 2013
    Publication date: July 24, 2014
    Inventors: Hideyuki TOMIZAWA, Akihiro KOJIMA, Miyoko SHIMADA, Yosuke AKIMOTO, Yoshiaki SUGIZAKI, Hideto FURUYAMA
  • Patent number: 8669698
    Abstract: According to an embodiment, a wavelength converter includes a resin allowing light emitted from a light source to pass through, a plurality of particle-shaped fluorescent substances dispersed in the resin, and fillers dispersed in the resin with a particle diameter smaller than the fluorescent substance. The fluorescent substances absorb the light emitted from the light source and emits fluorescence having a wavelength different from a wavelength of the light emitted from the light source; and a distribution of the fillers has higher density near the fluorescent substance than a density at a middle position between the fluorescent substances adjacent to each other.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: March 11, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Miyoko Shimada, Akhiro Kojima, Yosuke Akimoto, Hideyuki Tomizawa, Hideto Furuyama, Yoshiaki Sugizaki
  • Patent number: 8648375
    Abstract: According to one embodiment, a semiconductor light emitting device includes: a semiconductor layer including a first and second surfaces, and a light emitting layer; a p-side electrode provided on the second surface; an n-side electrode provided on the second surface; a first insulating film covering the p-side and the n-side electrodes; a p-side wiring section electrically connected to the p-side electrode through the first insulating film; an n-side wiring section electrically connected to the n-side electrode through the first insulating film; and a phosphor layer provided on the first surface. The phosphor layer has an upper surface and an oblique surface, the oblique surface forming an obtuse angle with the upper surface and inclined with respect to the first surface. Thickness of the phosphor layer immediately below the oblique surface is smaller than thickness of the phosphor layer immediately below the upper surface.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: February 11, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideto Furuyama, Akihiro Kojima, Miyoko Shimada, Yosuke Akimoto, Hideyuki Tomizawa
  • Publication number: 20140027914
    Abstract: Systems and methods are presented for preventing removal of material comprising a metal gate during removal of a mask layer in a semiconductor structure. Upon exposure of the metal line during formation of a via opening the exposed portion of the metal line undergoes chemical modification to form a passivation layer. The passivation layer is subsequently covered by an etch selectivity layer, wherein the etch selectivity layer prevents removal of at least one of a portion of the metal line or the passivation layer during removal of a hard mask layer comprising the semiconductor structure. In an alternate approach, the metal line is formed with a capping layer which, following exposure by a via opening formed in the semiconductor structure, is chemically modified to form a layer having etch selectivity to acts as a protective layer during removal of a hard mask layer comprising the semiconductor layer.
    Type: Application
    Filed: July 24, 2012
    Publication date: January 30, 2014
    Applicant: TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.
    Inventors: Hideyuki Tomizawa, Masao Ishikawa, Hideshi Miyajima
  • Publication number: 20140001502
    Abstract: According to one embodiment, a semiconductor light emitting device includes a first semiconductor layer, a light emitting layer, a second semiconductor layer, a p-side electrode, a plurality of n-side electrodes, a first insulating film, a p-side interconnect unit, and an n-side interconnect unit. The p-side interconnect unit is provided on the first insulating film to connect to the p-side electrode through a first via piercing the first insulating film. The n-side interconnect unit is provided on the first insulating film to commonly connect to the plurality of n-side electrodes through a second via piercing the first insulating film. The plurality of n-side regions is separated from each other without being linked at the second surface. The p-side region is provided around each of the n-side regions at the second surface.
    Type: Application
    Filed: February 28, 2013
    Publication date: January 2, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke AKIMOTO, Yoshiaki SUGIZAKI, Akihiro KOJIMA, Miyoko SHIMADA, Hideyuki TOMIZAWA, Hideto FURUYAMA
  • Patent number: 8614510
    Abstract: A method for manufacturing a semiconductor device includes forming an insulating film including silicon, oxygen, carbon and hydrogen above a semiconductor substrate, forming a wiring trench in the insulating film, forming a metal film to be a metal wiring on the insulating film such that the metal film is provided in the wiring trench, forming the metal wiring by removing the metal film outside the wiring trench, performing a hydrophobic treatment to the surface of the insulating film after the forming the metal wiring, and forming a metal cap selectively on an upper surface of the metal wiring by plating after the performing the hydrophobic treatment.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: December 24, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideyuki Tomizawa, Noriaki Matsunaga, Tadayoshi Watanabe, Shiro Mishima, Masako Kodera
  • Publication number: 20130320371
    Abstract: According to one embodiment, a device module includes a mounting substrate, a device, and a bonding agent. The mounting substrate has a mounting surface and a plurality of pads. The device includes a plurality of electrode surfaces arranged in a first direction. The pad has a first width portion and a second width portion. The first width portion has a width in a second direction orthogonal to the first direction. The second width portion is wider than the first width portion and the electrode surfaces in the second direction. One end portion in the first direction of the electrode surface is bonded to the pad on the first width portion via the bonding agent. The other end portion in the first direction of the electrode surface is bonded to the pad on the second width portion via the bonding agent.
    Type: Application
    Filed: March 4, 2013
    Publication date: December 5, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshiaki SUGIZAKI, Hideto FURUYAMA, Akihiro KOJIMA, Miyoko SHIMADA, Yosuke AKIMOTO, Hideyuki TOMIZAWA
  • Publication number: 20130313589
    Abstract: According to an embodiment, a semiconductor light emitting device includes a semiconductor layer, a p-side electrode, n-side electrode and a resin layer. The semiconductor layer has a first face and a second face opposite to the first face, and includes a light emitting layer. The p-side electrode is provided on the semiconductor layer on the second face side. The n-side electrode is provided on the semiconductor layer on the second face side. The resin layer is provided on the first face and transmits light emitted from the light emitting layer, the resin layer including a top surface opposite to the first face and four side faces provided along an outer edge of the first face and connected to the top surface, the resin layer including a scattering substance scattering the light emitted from the light emitting layer.
    Type: Application
    Filed: February 27, 2013
    Publication date: November 28, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideyuki TOMIZAWA, Akihiro KOJIMA, Miyoko SHIMADA, Yosuke AKIMOTO, Yoshiaki SUGIZAKI, Hideto FURUYAMA
  • Publication number: 20130313581
    Abstract: According to one embodiment, a semiconductor light emitting device includes: a semiconductor layer including a first and second surfaces, and a light emitting layer; a p-side electrode provided on the second surface; an n-side electrode provided on the second surface; a first insulating film covering the p-side and the n-side electrodes; a p-side wiring section electrically connected to the p-side electrode through the first insulating film; an n-side wiring section electrically connected to the n-side electrode through the first insulating film; and a phosphor layer provided on the first surface. The phosphor layer has an upper surface and an oblique surface, the oblique surface forming an obtuse angle with the upper surface and inclined with respect to the first surface. Thickness of the phosphor layer immediately below the oblique surface is smaller than thickness of the phosphor layer immediately below the upper surface.
    Type: Application
    Filed: August 31, 2012
    Publication date: November 28, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Hideto Furuyama, Akihiro Kojima, Miyoko Shimada, Yosuke Akimoto, Hideyuki Tomizawa
  • Publication number: 20130313591
    Abstract: According to an embodiment, a semiconductor light emitting device includes a semiconductor layer, a p-side electrode, an n-side electrode and an insulating layer. The semiconductor layer has a first face and a second face opposite to the first face, and includes a light emitting layer. The p-side electrode is provided in a region including the light emitting layer on the second face side, and the n-side electrode is provided in a region not including the light emitting layer on the second face side. The insulating layer covers the semiconductor layer, the p-side electrode, and the n-side electrode on the second face side, and includes at least a portion containing a magnetic substance.
    Type: Application
    Filed: February 28, 2013
    Publication date: November 28, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Miyoko SHIMADA, Akihiro KOJIMA, Yosuke AKIMOTO, Hideyuki TOMIZAWA, Hideto FURUYAMA, Yoshiaki SUGIZAKI
  • Publication number: 20130313592
    Abstract: According to an embodiment, a semiconductor light emitting device includes a semiconductor layer, a first electrode, an second electrode, a first insulating film, a first interconnection and a second interconnection. The semiconductor layer includes a luminous portion and a non-luminous portion. The first electrode is provided on the luminous portion, and the second electrode is provided on the non-luminous portion. The first insulating film is provided on the semiconductor layer, the first electrode and the second electrode. The first interconnection having a first protrusion is provided on the first insulating film and electrically connected to the first electrode. The second interconnection having a second protrusion is provided on the first insulating film and electrically connected to the second electrode. A tip end of the first protrusion faces a tip end of a second protrusion, being apart therefrom with a minimum gap between the first interconnection and the second interconnection.
    Type: Application
    Filed: March 4, 2013
    Publication date: November 28, 2013
    Inventors: Yoshiaki SUGIZAKI, Hideyuki TOMIZAWA, Akihiro KOJIMA, Hideto FURUYAMA, Miyoko SHIMADA, Yosuke AKIMOTO
  • Publication number: 20130313588
    Abstract: According to an embodiment, a semiconductor light emitting device includes a semiconductor layer having a light emitting layer. The device also includes a p-side electrode provided on a first region including the light emitting layer; an n-side electrode provided on a second region layer not including the light emitting layer; and a first insulating film having a first opening communicating with the p-side electrode and a second opening communicating with the n-side electrode. A p-side interconnection is provided on the first insulating film and electrically connected to the p-side electrode through the first opening. An n-side interconnection is provided on the first insulating film and electrically connected to the n-side electrode through the second opening. The p-side interconnection has a plurality of protrusive parts protruding toward the n-side interconnection, and the n-side interconnection has a plurality of portions extending between the protrusive parts of the p-side interconnection.
    Type: Application
    Filed: August 31, 2012
    Publication date: November 28, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akihiro KOJIMA, Yosuke AKIMOTO, Hideyuki TOMIZAWA, Hideko MUKAIDA, Miyoko SHIMADA, Yoshiaki SUGIZAKI, Hideto FURUYAMA
  • Publication number: 20130313590
    Abstract: According to one embodiment, a semiconductor light emitting device includes a semiconductor layer, a first electrode, a second electrode, a first interconnection section, a second interconnection section, and a varistor film. The semiconductor layer includes a light emitting layer. The first electrode is provided in a emitting region on the second surface. The second electrode is provided in a non-emitting region on the second surface. The first interconnection section is provided on the first electrode and electrically connected to the first electrode. The second interconnection section is provided on the second electrode and on the first electrode and electrically connected to the second electrode. The varistor film is provided in contact with the first electrode and the second interconnection section between the first electrode and the second interconnection section.
    Type: Application
    Filed: February 28, 2013
    Publication date: November 28, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke AKIMOTO, Yoshiaki SUGIZAKI, Hideyuki TOMIZAWA, Masanobu ANDO, Akihiro KOJIMA, Gen WATARI, Naoya USHIYAMA, Tetsuro KOMATSU, Miyoko SHIMADA, Hideto FURUYAMA
  • Publication number: 20130285064
    Abstract: According to one embodiment, a semiconductor light emitting device includes a semiconductor layer, a p-side electrode, an n-side electrode, a phosphor layer, and a transparent film. The semiconductor layer has a first face, a second face opposite to the first face, and a light emitting layer. The p-side electrode is provided on the second face in an area including the light emitting layer. The n-side electrode is provided on the second face in an area not including the light emitting layer. The phosphor layer is provided on the first face. The phosphor layer includes a transparent resin and phosphor dispersed in the transparent resin. The transparent film is provided on the phosphor layer and has an adhesiveness lower than an adhesiveness of the transparent resin.
    Type: Application
    Filed: August 29, 2012
    Publication date: October 31, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akihiro KOJIMA, Hideto FURUYAMA, Miyoko SHIMADA, Yosuke AKIMOTO, Hideyuki TOMIZAWA, Yoshiaki SUGIZAKI
  • Publication number: 20130285536
    Abstract: According to an embodiment, a wavelength converter includes a resin allowing light emitted from a light source to pass through, a plurality of particle-shaped fluorescent substances dispersed in the resin, and fillers dispersed in the resin with a particle diameter smaller than the fluorescent substance. The fluorescent substances absorb the light emitted from the light source and emits fluorescence having a wavelength different from a wavelength of the light emitted from the light source; and a distribution of the fillers has higher density near the fluorescent substance than a density at a middle position between the fluorescent substances adjacent to each other.
    Type: Application
    Filed: August 29, 2012
    Publication date: October 31, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Miyoko SHIMADA, Akhiro Kojima, Yosuke Akimoto, Hideyuki Tomizawa, Hideto Furuyama, Yoshiaki Sugizaki
  • Publication number: 20130285089
    Abstract: According to an embodiment, a semiconductor light emitting device includes a semiconductor layer including a light emitting layer and a fluorescent substance excited by light emitted from the light emitting layer, a peak wavelength of a radiation spectrum of the light emitting layer at a room temperature being shorter than a peak wavelength of an excitation spectrum of the fluorescent substance.
    Type: Application
    Filed: August 29, 2012
    Publication date: October 31, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yosuke AKIMOTO, Akihiro KOJIMA, Miyoko SHIMADA, Hideyuki TOMIZAWA, Yoshiaki SUGIZAKI, Hideto FURUYAMA
  • Publication number: 20130285077
    Abstract: According to one embodiment, a light emitting module includes a mounting substrate, a plurality of light emitting chips, a transparent layer, and a phosphor layer. The transparent layer is provided between the plurality of light emitting chips on the mounting face and on the light emitting chip. The transparent layer has a first transparent body and a scattering agent dispersed at least in the first transparent body between the plurality of light emitting chips. The scattering agent has a different refraction index from a refraction index of the first transparent body. The phosphor layer is provided on the transparent layer. The light emitting chip includes a semiconductor layer, a p-side electrode, an n-side electrode, a p-side external terminal, and an n-side external terminal.
    Type: Application
    Filed: August 28, 2012
    Publication date: October 31, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akihiro KOJIMA, Hideto FURUYAMA, Miyoko SHIMADA, Yosuke AKIMOTO, Hideyuki TOMIZAWA