Patents by Inventor Tadashi Iijima

Tadashi Iijima 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: 8063487
    Abstract: A first conducting layer is formed on a side of a main surface on which an electrode terminal of a semiconductor device is provided in a semiconductor substrate. The first conducting layer is electrically connected to the electrode terminal of the semiconductor device. A mask layer that has an opening at a predetermined position is formed on the first conducting layer. A second conducting layer is formed inside the opening of the mask layer. The mask layer is removed. A relocation wiring that includes the first conducting layer and electrically draws out the electrode terminal is formed by performing anisotropic etching for the first conducting layer using the second conducting layer as a mask. Finally, a bump is formed on the relocation wiring by causing the second conducting layer to reflow.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: November 22, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tatsuo Migita, Hirokazu Ezawa, Tadashi Iijima, Takashi Togasaki
  • Publication number: 20110024901
    Abstract: According to one embodiment, a manufacturing method of a semiconductor device attained as follows. A dielectric layer having a first opening and a second opening reaching an electrode terminal is formed by modifying a photosensitive resin film on a substrate on which the electrode terminal of a first conductive layer is provided. Next, a second conductive layer that is electrically connected to the electrode terminal is formed on the dielectric layer that includes inside of the first opening, and a third conductive layer that has an oxidation-reduction potential of which difference from the oxidation-reduction potential of the first conductive layer is smaller than a difference of the oxidation-reduction potential between the first conductive layer and the second conductive layer is formed on the second conductive layer.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 3, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Soichi Yamashita, Tatsuo Migita, Tadashi Iijima, Masahiro Miyata, Masayuki Uchida, Takashi Togasaki, Hirokazu Ezawa
  • Publication number: 20100319662
    Abstract: An EGR valve device includes a valve housing of which inside exhaust gas passes through, a poppet valve as a valve body accommodated in the valve housing, and a hydraulic servo actuator for driving the poppet valve to be opened and closed. The hydraulic servo actuator is provided by a three-port or four-port servo valve.
    Type: Application
    Filed: December 26, 2007
    Publication date: December 23, 2010
    Inventors: Hideyuki Seiyama, Tadashi Iijima, Shuuji Hori, Daisuke Kozuka, Taisei Okubo
  • Patent number: 7768134
    Abstract: An interconnect method in a semiconductor device may include a step of examining various regions of an inter layer dielectric to identify regions having high densities or concentrations of trench features. A cap insulator layer may be added to the dielectric to assist in outgassing of absorbed impurities from the dielectric, but may be removed from the high density areas to allow the lower density areas to increase outgassing. The lower density areas may then compensate for increased outgassing on the high density areas due to the trench features, and may result in an overall device with a more stable dielectric constant across the device.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: August 3, 2010
    Assignee: Toshiba America Electronic Components, Inc.
    Inventors: Yoshiaki Shimooka, Tadashi Iijima
  • Patent number: 7716961
    Abstract: A method for executing water jet peening for giving an impact force to a surface of a structure member by a crushing pressure of a water jet and cavitation and improving residual stress, or washing, or reforming said surface, wherein said water jet peening is executed so as to make a natural frequency of oscillation of said structure member and a excitation frequency of oscillation of water jet peening different from each other.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: May 18, 2010
    Assignee: Hitachi-GE Nuclear Energy, Ltd.
    Inventors: Hisamitu Hatou, Noboru Saitou, Ren Morinaka, Tomohiko Motoki, Tadashi Iijima, Yuichi Koide, Jun Kashiwakura
  • Publication number: 20100052162
    Abstract: A semiconductor device, includes a semiconductor substrate; and a solder bump part, which is formed on the semiconductor substrate and in which no grain boundary extends equal to or over ? of a diameter dimension of said solder bump part from an outer circumferential surface between an end of a connection part with the semiconductor substrate and a lateral portion.
    Type: Application
    Filed: July 2, 2009
    Publication date: March 4, 2010
    Inventor: Tadashi IIJIMA
  • Publication number: 20090218230
    Abstract: A method of producing an electronic component includes forming a film of a first metal above a substrate; converting partly the film of the first metal into a film containing a second metal by replacement of at least part of the first metal with the second metal; forming a film of a third metal above the film containing the second metal; and removing the film of the first metal other than the film containing the second metal by wet etching using the film of the third metal as a mask.
    Type: Application
    Filed: February 12, 2009
    Publication date: September 3, 2009
    Inventor: Tadashi Iijima
  • Publication number: 20090200664
    Abstract: A first conducting layer is formed on a side of a main surface on which an electrode terminal of a semiconductor device is provided in a semiconductor substrate. The first conducting layer is electrically connected to the electrode terminal of the semiconductor device. A mask layer that has an opening at a predetermined position is formed on the first conducting layer. A second conducting layer is formed inside the opening of the mask layer. The mask layer is removed. A relocation wiring that includes the first conducting layer and electrically draws out the electrode terminal is formed by performing anisotropic etching for the first conducting layer using the second conducting layer as a mask. Finally, a bump is formed on the relocation wiring by causing the second conducting layer to reflow.
    Type: Application
    Filed: December 16, 2008
    Publication date: August 13, 2009
    Inventors: Tatsuo Migita, Hirokazu Ezawa, Tadashi Iijima, Takashi Togasaki
  • Publication number: 20090146290
    Abstract: An interconnect method in a semiconductor device may include a step of examining various regions of an inter layer dielectric to identify regions having high densities or concentrations of trench features. A cap insulator layer may be added to the dielectric to assist in outgassing of absorbed impurities from the dielectric, but may be removed from the high density areas to allow the lower density areas to increase outgassing. The lower density areas may then compensate for increased outgassing on the high density areas due to the trench features, and may result in an overall device with a more stable dielectric constant across the device.
    Type: Application
    Filed: February 10, 2009
    Publication date: June 11, 2009
    Applicant: Toshiba America Electronic Components, Inc.
    Inventors: Yoshiaki Shimooka, Tadashi Iijima
  • Patent number: 7524758
    Abstract: An interconnect method in a semiconductor device may include a step of examining various regions of an inter layer dielectric to identify regions having high densities or concentrations of trench features. A cap insulator layer may be added to the dielectric to assist in outgassing of absorbed impurities from the dielectric, but may be removed from the high density areas to allow the lower density areas to increase outgassing. The lower density areas may then compensate for increased outgassing on the high density areas due to the trench features, and may result in an overall device with a more stable dielectric constant across the device.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: April 28, 2009
    Assignee: Toshiba America Electronic Components, Inc.
    Inventors: Yoshiaki Shimooka, Tadashi Iijima
  • Publication number: 20090056399
    Abstract: A method for executing water jet peening for giving an impact force to a surface of a structure member by a crushing pressure of a water jet and cavitation and improving residual stress, or washing, or reforming said surface, wherein said water jet peening is executed so as to make a natural frequency of oscillation of said structure member and a excitation frequency of oscillation of water jet peening different from each other.
    Type: Application
    Filed: August 27, 2008
    Publication date: March 5, 2009
    Inventors: Hisamitu Hatou, Noboru Saitou, Ren Morinaka, Tomohiko Motoki, Tadashi IIjima, Yuichi Koide, Jun Kashiwakura
  • Publication number: 20090020106
    Abstract: An exhaust gas recirculation system having an exhaust line connected to an exhaust manifold of an engine; an intake line connected to an intake manifold of the engine; and an EGR line that intercommunicates the exhaust line and the intake line, in which a part of exhaust gas exhausted from the exhaust line is delivered to the intake line via the EGR line to be recirculated in the engine, is provided with a liquid cooling heat exchanger made of a corrosion-resistant material at downstream of an intersection with the EGR line in the intake line.
    Type: Application
    Filed: February 20, 2007
    Publication date: January 22, 2009
    Inventors: Tadashi Iijima, Hirofumi Kizawa
  • Patent number: 7476971
    Abstract: A semiconductor device and a method for making the semiconductor device having a barrier layer in a via hole region and a barrier layer in a via line region. The barrier layer in the via line region is initially thicker than the barrier layer in the via hole region, prior to being etched during an etching process due to varying selectivity of etching rates between the via hole region and the via line region.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: January 13, 2009
    Assignee: Toshiba America Electronic Components, Inc.
    Inventor: Tadashi Iijima
  • Publication number: 20080122089
    Abstract: A semiconductor device is provided. The semiconductor device includes a region of closely packed lines and a region including an isolated line, separated by a region of carbon doped silicon oxide. As the surface of the semiconductor device is etched, the etching rate varies depending on the material being etched. Accordingly, the cross-sectional area of the isolated line must be adjusted to compensate for the slowed etching process in that region. The close packed lines may have a height, a, and a width, b thus having a cross-sectional area of a*b. However, the isolated line may have a height D*a, and a width, E*b, where D*E=1. Singular or multiple etching processes may used and the line widths adjusted accordingly.
    Type: Application
    Filed: November 8, 2006
    Publication date: May 29, 2008
    Applicant: TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.
    Inventor: Tadashi Iijima
  • Publication number: 20070264817
    Abstract: A semiconductor device and a method for making the semiconductor device having a barrier layer in a via hole region and a barrier layer in a via line region. The barrier layer in the via line region is initially thicker than the barrier layer in the via hole region, prior to being etched during an etching process due to varying selectivity of etching rates between the via hole region and the via line region.
    Type: Application
    Filed: May 11, 2006
    Publication date: November 15, 2007
    Applicant: TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.
    Inventor: Tadashi Iijima
  • Publication number: 20070197024
    Abstract: An interconnect method in a semiconductor device may include a step of examining various regions of an inter layer dielectric to identify regions having high densities or concentrations of trench features. A cap insulator layer may be added to the dielectric to assist in outgassing of absorbed impurities from the dielectric, but may be removed from the high density areas to allow the lower density areas to increase outgassing. The lower density areas may then compensate for increased outgassing on the high density areas due to the trench features, and may result in an overall device with a more stable dielectric constant across the device.
    Type: Application
    Filed: February 17, 2006
    Publication date: August 23, 2007
    Applicant: Toshiba America Electronic Components, Inc.
    Inventors: Yoshiaki Shimooka, Tadashi Iijima
  • Patent number: 7156069
    Abstract: A combustion chamber opening toward a cylinder head is provided on a top surface of a piston, and this combustion chamber comprises a first volume having an inclined surface and a second volume further recessed from the first volume toward a pin boss. Fuel spray F from a fuel injection nozzle is injected toward an inner peripheral wall section of the second volume in a former stage of fuel injection and toward the inclined surface of the first volume in a later stage of fuel injection, and the percentage of the fuel injection period in the former stage against the total fuel injection period is set to the range from 40% to 70%.
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: January 2, 2007
    Assignee: Komatsu Ltd.
    Inventors: Yutaka Ono, Tadashi Iijima, Masaki Takahashi
  • Patent number: 7096848
    Abstract: A combustion chamber (20) opening toward a cylinder head (5) is provided on a top surface (11) of a piston (10), and this combustion chamber (20) comprises a first volume (22) having an inclined surface (20) and a second volume (23) further recessed from the first volume (22) toward a pin boss (13). Fuel spray F from a fuel injection nozzle (9) is injected toward an inner peripheral wall section (24) of the second volume (23) in a former stage of fuel injection and toward the inclined surface (21) of the first volume (22) in a later stage of fuel injection, and the percentage of the fuel injection period in the former stage against the total fuel injection period is set to the range from 40% to 70%.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: August 29, 2006
    Assignee: Komatsu Ltd.
    Inventors: Yutaka Ono, Tadashi Iijima, Masaki Takahashi
  • Patent number: 7091122
    Abstract: Disclosed is a semiconductor device comprising a substrate, a first region provided on the substrate and comprising a first insulating portion which includes an insulating film having a relative dielectric constant of at most 3.0 and a conductive portion which is provided in the first insulating portion, a second region provided on the substrate, located adjacent to the first region in a direction parallel to a major surface of the substrate and comprising a second insulating portion which is located adjacent to the first insulating portion in the direction and which includes no insulating film having a relative dielectric constant of at most 3.0, and a pad provided on the second region and electrically connected to the conductive portion.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: August 15, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tadashi Iijima
  • Publication number: 20060124103
    Abstract: A combustion chamber opening toward a cylinder head is provided on a top surface of a piston, and this combustion chamber comprises a first volume having an inclined surface and a second volume further recessed from the first volume toward a pin boss. Fuel spray F from a fuel injection nozzle is injected toward an inner peripheral wall section of the second volume in a former stage of fuel injection and toward the inclined surface of the first volume in a later stage of fuel injection, and the percentage of the fuel injection period in the former stage against the total fuel injection period is set to the range from 40% to 70%.
    Type: Application
    Filed: February 2, 2006
    Publication date: June 15, 2006
    Applicant: KOMATSU LTD.
    Inventors: Yutaka Ono, Tadashi Iijima, Masaki Takahashi