Patents by Inventor Masao Iwase

Masao Iwase 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: 20130056816
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes: a substrate; a memory unit provided on the substrate; and a non-memory unit provided on the substrate. The memory unit includes: a first stacked body including a plurality of first electrode films and a first inter-electrode insulating film, the plurality of first electrode films being stacked along a first axis perpendicular to the major surface, the first inter-electrode insulating film being provided between two of the first electrode films mutually adjacent along the first axis; a first semiconductor layer opposing side surfaces of the first electrode films; a first memory film provided between the first semiconductor layer and the first electrode films; and a first conductive film provided on the first stacked body apart from the first stacked body. The non-memory unit includes a resistance element unit of the same layer as the conductive film.
    Type: Application
    Filed: March 15, 2012
    Publication date: March 7, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Hiroyasu Tanaka
  • Patent number: 8247860
    Abstract: A nonvolatile semiconductor memory device includes: a substrate; a stacked body with a plurality of dielectric films and electrode films alternately stacked therein, the stacked body being provided on the substrate and having a step in its end portion for each of the electrode films; an interlayer dielectric film burying the end portion of the stacked body; a plurality of semiconductor pillars extending in the stacking direction of the stacked body and penetrating through a center portion of the stacked body; a charge storage layer provided between one of the electrode films and one of the semiconductor pillars; and a plug buried in the interlayer dielectric film and connected to a portion of each of the electrode films constituting the step, a portion of each of the dielectric films in the center portion having a larger thickness than a portion of each of the dielectric films in the end portion.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: August 21, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Tadashi Iguchi
  • Patent number: 8241984
    Abstract: A semiconductor device including a semiconductor substrate, and a memory cell and a peripheral circuit provided on the semiconductor substrate, the memory cell having a first insulating film, a first electrode layer, a second insulating film, and a second electrode layer provided on the semiconductor substrate in order, and the peripheral circuit having the first insulating film, the first electrode layer, the second insulating film having an opening for the peripheral circuit, and the second electrode layer electrically connected to the first electrode layer through the opening for the peripheral circuit, wherein a thickness of the first electrode layer under the second insulating film of the peripheral circuit is thicker than a thickness of the first electrode layer of the memory cell.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: August 14, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Tadashi Iguchi
  • Publication number: 20110053363
    Abstract: A semiconductor device including a semiconductor substrate, and a memory cell and a peripheral circuit provided on the semiconductor substrate, the memory cell having a first insulating film, a first electrode layer, a second insulating film, and a second electrode layer provided on the semiconductor substrate in order, and the peripheral circuit having the first insulating film, the first electrode layer, the second insulating film having an opening for the peripheral circuit, and the second electrode layer electrically connected to the first electrode layer through the opening for the peripheral circuit, wherein a thickness of the first electrode layer under the second insulating film of the peripheral circuit is thicker than a thickness of the first electrode layer of the memory cell.
    Type: Application
    Filed: November 2, 2010
    Publication date: March 3, 2011
    Inventors: Masao Iwase, Tadashi Iguchi
  • Publication number: 20110001178
    Abstract: A nonvolatile semiconductor memory device includes: a substrate; a stacked body with a plurality of dielectric films and electrode films alternately stacked therein, the stacked body being provided on the substrate and having a step in its end portion for each of the electrode films; an interlayer dielectric film burying the end portion of the stacked body; a plurality of semiconductor pillars extending in the stacking direction of the stacked body and penetrating through a center portion of the stacked body; a charge storage layer provided between one of the electrode films and one of the semiconductor pillars; and a plug buried in the interlayer dielectric film and connected to a portion of each of the electrode films constituting the step, a portion of each of the dielectric films in the center portion having a larger thickness than a portion of each of the dielectric films in the end portion.
    Type: Application
    Filed: December 23, 2009
    Publication date: January 6, 2011
    Inventors: Masao IWASE, Tadahi Iguchi
  • Patent number: 7847337
    Abstract: A semiconductor device including a semiconductor substrate, and a memory cell and a peripheral circuit provided on the semiconductor substrate, the memory cell having a first insulating film, a first electrode layer, a second insulating film, and a second electrode layer provided on the semiconductor substrate in order, and the peripheral circuit having the first insulating film, the first electrode layer, the second insulating film having an opening for the peripheral circuit, and the second electrode layer electrically connected to the first electrode layer through the opening for the peripheral circuit, wherein a thickness of the first electrode layer under the second insulating film of the peripheral circuit is thicker than a thickness of the first electrode layer of the memory cell.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: December 7, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Tadashi Iguchi
  • Patent number: 7700381
    Abstract: A semiconductor wafer has a bevel contour formed along the periphery thereof, products formed on the wafer, and an ID mark formed on the bevel contour. The ID mark shows at least the properties, manufacturing conditions, and test results of the products.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: April 20, 2010
    Assignee: Kabushikia Kaisha Toshiba
    Inventors: Tsunetoshi Arikado, Masao Iwase, Soichi Nadahara, Yuso Udo, Yukihiro Ushiku, Shinichi Nitta, Moriya Miyashita, Junji Sugamoto, Hiroaki Yamada, Hajime Nagano, Katsujiro Tanzawa, Hiroshi Matsushita, Norihiko Tsuchiya, Katsuya Okumura
  • Publication number: 20100051073
    Abstract: A method for cleaning a wafer includes measuring a cross-sectional shape of an edge portion of wafer cut along a radial direction, assigning the measured shape to one of a plurality of groups classified by the shapes, determining an amount of cleaning liquid to be supplied and rotational speed at which the wafer is rotated depending a determination criterion, rotating the wafer and spraying the cleaning liquid toward a back face of the rotating wafer, and cleaning the edge portion and the back face of the wafer by spreading the cleaning liquid to the edge portion of the wafer.
    Type: Application
    Filed: November 4, 2009
    Publication date: March 4, 2010
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Kazuhiko Takase
  • Patent number: 7632358
    Abstract: A method for cleaning a wafer includes measuring a cross-sectional shape of an edge portion of wafer cut along a radial direction, assigning the measured shape to one of a plurality of groups classified by the shapes, determining an amount of cleaning liquid to be supplied and rotational speed at which the wafer is rotated depending a determination criterion, rotating the wafer and spraying the cleaning liquid toward a back face of the rotating wafer, and cleaning the edge portion and the back face of the wafer by spreading the cleaning liquid to the edge portion of the wafer.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: December 15, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Kazuhiko Takase
  • Patent number: 7613537
    Abstract: A method of recognizing ID marks encompasses reading the ID marks appended on base materials, and converting the ID marks into bit data; identifying the converted bit data with one of original bit data, when deterioration of the ID mark is within an error correction ability; specifying the converted bit data as damaged data, when the deterioration of the ID mark is beyond the error correction ability; comparing candidate original data with the damaged data and calculates the concordance ratios, the candidate original data is an original bit data not identified by the converted bit data; conjecturing one of candidate original data having the highest concordance ratio as the conjectured bit data of the subject damaged data; and judging whether the conjectured bit data can be adopted as a true bit data for the damaged data.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: November 3, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Masao Iwase
  • Publication number: 20080308859
    Abstract: A semiconductor device including a semiconductor substrate, and a memory cell and a peripheral circuit provided on the semiconductor substrate, the memory cell having a first insulating film, a first electrode layer, a second insulating film, and a second electrode layer provided on the semiconductor substrate in order, and the peripheral circuit having the first insulating film, the first electrode layer, the second insulating film having an opening for the peripheral circuit, and the second electrode layer electrically connected to the first electrode layer through the opening for the peripheral circuit, wherein a thickness of the first electrode layer under the second insulating film of the peripheral circuit is thicker than a thickness of the first electrode layer of the memory cell.
    Type: Application
    Filed: June 9, 2008
    Publication date: December 18, 2008
    Inventors: Masao Iwase, Tadashi Iguchi
  • Patent number: 7268053
    Abstract: A semiconductor wafer includes (a) a first principal side and a second principal side opposite to each other, (b) a first bevel contour and a second bevel contour provided at an outer periphery of the first principal side and the second principal side, (c) a first recess formed in the first bevel contour, and (d) a first type of ID mark configured by a protruding dot provided on a bottom face of the first recess.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: September 11, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Soichi Nadahara
  • Patent number: 7253500
    Abstract: A semiconductor wafer includes (a) a first principal side and a second principal side opposite to each other, (b) a first bevel contour and a second bevel contour provided at an outer periphery of the first principal side and the second principal side, (c) a first recess formed in the first bevel contour, and (d) a first type of ID mark configured by a protruding dot provided on a bottom face of the first recess.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: August 7, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Soichi Nadahara
  • Publication number: 20060272676
    Abstract: A method for cleaning a wafer includes measuring a cross-sectional shape of an edge portion of wafer cut along a radial direction, assigning the measured shape to one of a plurality of groups classified by the shapes, determining an amount of cleaning liquid to be supplied and rotational speed at which the wafer is rotated depending a determination criterion, rotating the wafer and spraying the cleaning liquid toward a back face of the rotating wafer, and cleaning the edge portion and the back face of the wafer by spreading the cleaning liquid to the edge portion of the wafer.
    Type: Application
    Filed: May 31, 2006
    Publication date: December 7, 2006
    Inventors: Masao Iwase, Kazuhiko Takase
  • Publication number: 20060131696
    Abstract: A semiconductor wafer has a bevel contour formed along the periphery thereof, products formed on the wafer, and an ID mark formed on the bevel contour. The ID mark shows at least the properties, manufacturing conditions, and test results of the products.
    Type: Application
    Filed: February 9, 2006
    Publication date: June 22, 2006
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tsunetoshi Arikado, Masao Iwase, Soichi Nadahara, Yuso Udo, Yukihiro Ushiku, Shinichi Nitta, Moriya Miyashita, Junji Sugamoto, Hiroaki Yamada, Hajime Nagano, Katsujiro Tanzawa, Hiroshi Matsushita, Norihiko Tsuchiya, Katsuya Okumura
  • Publication number: 20060118916
    Abstract: A semiconductor wafer includes (a) a first principal side and a second principal side opposite to each other, (b) a first bevel contour and a second bevel contour provided at an outer periphery of the first principal side and the second principal side, (c) a first recess formed in the first bevel contour, and (d) a first type of ID mark configured by a protruding dot provided on a bottom face of the first recess.
    Type: Application
    Filed: December 29, 2005
    Publication date: June 8, 2006
    Inventors: Masao Iwase, Soichi Nadahara
  • Patent number: 7057259
    Abstract: A semiconductor wafer has a bevel contour formed along the periphery thereof, products formed on the wafer, and an ID mark formed on the bevel contour. The ID mark shows at least the properties, manufacturing conditions, and test results of the products.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: June 6, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsunetoshi Arikado, Masao Iwase, Soichi Nadahara, Yuso Udo, Yukihiro Ushiku, Shinichi Nitta, Moriya Miyashita, Junji Sugamoto, Hiroaki Yamada, Hajime Nagano, Katsujiro Tanzawa, Hiroshi Matsushita, Norihiko Tsuchiya, Katsuya Okumura
  • Patent number: 7015566
    Abstract: A semiconductor wafer includes (a) a first principal side and a second principal side opposite to each other, (b) a first bevel contour and a second bevel contour provided at an outer periphery of the first principal side and the second principal side, (c) a first recess formed in the first bevel contour, and (d) a first type of ID mark configured by a protruding dot provided on a bottom face of the first recess.
    Type: Grant
    Filed: October 20, 2003
    Date of Patent: March 21, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Soichi Nadahara
  • Publication number: 20050213458
    Abstract: A method of recognizing ID marks encompasses reading the ID marks appended on base materials, and converting the ID marks into bit data; identifying the converted bit data with one of original bit data, when deterioration of the ID mark is within an error correction ability; specifying the converted bit data as damaged data, when the deterioration of the ID mark is beyond the error correction ability; comparing candidate original data with the damaged data and calculates the concordance ratios, the candidate original data is an original bit data not identified by the converted bit data; conjecturing one of candidate original data having the highest concordance ratio as the conjectured bit data of the subject damaged data; and judging whether the conjectured bit data can be adopted as a true bit data for the damaged data.
    Type: Application
    Filed: January 19, 2005
    Publication date: September 29, 2005
    Inventor: Masao Iwase
  • Publication number: 20050167857
    Abstract: A semiconductor wafer includes (a) a first principal side and a second principal side opposite to each other, (b) a first bevel contour and a second bevel contour provided at an outer periphery of the first principal side and the second principal side, (c) a first recess formed in the first bevel contour, and (d) a first type of ID mark configured by a protruding dot provided on a bottom face of the first recess.
    Type: Application
    Filed: March 11, 2005
    Publication date: August 4, 2005
    Inventors: Masao Iwase, Soichi Nadahara