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).

  • Publication number: 20120241892
    Abstract: In a method for manufacturing a semiconductor device according to an embodiment, a trench is formed in an outer peripheral portion of a chip region on a bonding surface of a support substrate, and a semiconductor substrate having a chip ring in the outer peripheral portions of the chip regions on an inside of a dicing line respectively and the support substrate are bonded to position the trench from above the chip ring to the inside of the dicing line. In the method for manufacturing a semiconductor device, furthermore, the semiconductor substrate and the support substrate which are bonded to each other are subjected to dicing along the dicing line.
    Type: Application
    Filed: January 9, 2012
    Publication date: September 27, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Tadashi IIJIMA
  • Publication number: 20120244657
    Abstract: In a method for manufacturing a semiconductor device according to an embodiment, an epitaxial semiconductor layer is epitaxially grown on a semiconductor substrate, a photoelectric converting portion is formed on the epitaxial semiconductor layer, a wiring layer is formed on the epitaxial semiconductor layer after forming the photoelectric converting portion, a support substrate is bonded onto the wiring layer, and the semiconductor substrate is etched from an opposite surface side to a side for the bonding after the bonding. In the method for manufacturing a semiconductor device, an amorphous Si layer is formed on the opposite surface side of the epitaxial semiconductor layer after the etching and an antireflection film and a color filter are formed on the amorphous Si layer in sequence.
    Type: Application
    Filed: January 31, 2012
    Publication date: September 27, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Tadashi IIJIMA
  • Patent number: 8242597
    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: Grant
    Filed: July 2, 2009
    Date of Patent: August 14, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tadashi Iijima
  • Patent number: 8113184
    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: Grant
    Filed: December 26, 2007
    Date of Patent: February 14, 2012
    Assignee: Komatsu Ltd.
    Inventors: Hideyuki Seiyama, Tadashi Iijima, Shuuji Hori, Daisuke Kozuka, Taisei Okubo
  • Publication number: 20120028463
    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: October 6, 2011
    Publication date: February 2, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tatsuo Migita, Hirokazu Ezawa, Tadashi Iijima, Takashi Togasaki
  • 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