Patents by Inventor Hiroyuki Nansei

Hiroyuki Nansei 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: 20120309138
    Abstract: The present invention provides a semiconductor device that has a shorter distance between the bit lines and easily achieves higher storage capacity and density, and a method of manufacturing such a semiconductor device. The semiconductor device includes: first bit lines formed on a substrate; an insulating layer that is provided between the first bit lines on the substrate, and has a higher upper face than the first bit lines; channel layers that are provided on both side faces of the insulating layer, and are coupled to the respective first bit lines; and charge storage layers that are provided on the opposite side faces of the channel layers from the side faces on which the insulating layers are formed.
    Type: Application
    Filed: August 10, 2012
    Publication date: December 6, 2012
    Inventors: Yukio HAYAKAWA, Hiroyuki NANSEI
  • Patent number: 8264029
    Abstract: The present invention provides a semiconductor device that has a shorter distance between the bit lines and easily achieves higher storage capacity and density, and a method of manufacturing such a semiconductor device. The semiconductor device includes: first bit lines formed on a substrate; an insulating layer that is provided between the first bit lines on the substrate, and has a higher upper face than the first bit lines; channel layers that are provided on both side faces of the insulating layer, and are coupled to the respective first bit lines; and charge storage layers that are provided on the opposite side faces of the channel layers from the side faces on which the insulating layers are formed.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: September 11, 2012
    Assignee: Spansion LLC
    Inventors: Yukio Hayakawa, Hiroyuki Nansei
  • Patent number: 8143661
    Abstract: A memory cell system is provided including a first insulator layer over a semiconductor substrate, a charge trap layer over the first insulator layer, and slot where the charge trap layer includes a second insulator layer having the characteristic of being grown.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: March 27, 2012
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Shenqing Fang, Rinji Sugino, Jayendra Bhakta, Takashi Orimoto, Hiroyuki Nansei, Yukio Hayakawa, Takayuki Maruyama, Hidehiko Shiraiwa, Kuo-Tung Chang, Lei Xue, Meng Ding, Amol Ramesh Joshi, YouSeok Suh, Harpreet Sachar
  • Publication number: 20110210301
    Abstract: According to one embodiment, a non-volatile semiconductor memory device includes: a semiconductor substrate; a plurality of first lines; a plurality of second lines; and a plurality of non-volatile memory cells arranged at positions where the plurality of first lines intersect with the plurality of second lines, wherein each of the plurality of non-volatile memory cells includes a resistance change element and a rectifying element connected in series to the resistance change element, and a resistance change film continuously extending over the plurality of second lines is arranged between the plurality of first lines and the plurality of second lines, and the resistance change element includes a portion where the first line intersect with the second line in the resistance change film.
    Type: Application
    Filed: September 16, 2010
    Publication date: September 1, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Hiroyuki NANSEI
  • Publication number: 20110070713
    Abstract: According to one embodiment, a lower wiring layer is formed by using a sidewall transfer process for forming a sidewall film having a closed loop along a sidewall of a sacrificed or dummy pattern and, after removing the sacrificed pattern to leave the sidewall film, selectively removing the base material with the sidewall film as a mask. One or more upper wiring layers are formed in an upper layer of the lower wiring layer via another layer using the sidewall transfer process. Etching for cutting each of the lower wiring layer and the upper wiring layers is collectively performed, whereby closed-loop cut is applied to the lower wiring layer and the upper wiring layers.
    Type: Application
    Filed: September 15, 2010
    Publication date: March 24, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Hiroyuki Nansei
  • Patent number: 7888209
    Abstract: A semiconductor memory device with the thickness of both a tunnel film and a top film provided thereon configured to be in the FN tunneling region (4 nm or more). Data retention characteristics can be improved by configuring both a tunnel film and a top film to have a thickness in the FN tunneling region. Secondly, a high-concentration impurity region of a conductivity type the same as that of the substrate is provided in a substrate region arranged between assist gates provided adjacently to each other. The aforementioned high-concentration impurity region makes a depletion layer extremely thin when bias is applied to the assist gates. Hot holes generated between bands in the depletion region are injected into a charge storage region and the holes and electrons make pairs and disappear, enabling easy data erasing.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: February 15, 2011
    Assignee: Spansion LLC
    Inventor: Hiroyuki Nansei
  • Patent number: 7879670
    Abstract: A method of manufacturing a nonvolatile storage device having memory cell arrays according to an embodiment of the present invention includes forming, in a memory cell array forming region above a processed film, first columnar members arrayed at substantially equal intervals in the first direction and the second direction, forming, concerning at least arrays as a part of arrays of the first columnar members in the first direction, second columnar members long in section having major axes longer than sections of the first columnar members outside of the memory cell array forming region such that the major axes are set in the first direction and the second columnar members continue to ends of the arrays, and forming, in the same manner as above, third columnar members, which continue to arrays of the first columnar members in the second direction.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: February 1, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroyuki Nansei, Toshiharu Tanaka, Hirokazu Kikuchi
  • Publication number: 20100261330
    Abstract: A method of manufacturing a nonvolatile storage device having memory cell arrays according to an embodiment of the present invention includes forming, in a memory cell array forming region above a processed film, first columnar members arrayed at substantially equal intervals in the first direction and the second direction, forming, concerning at least arrays as a part of arrays of the first columnar members in the first direction, second columnar members long in section having major axes longer than sections of the first columnar members outside of the memory cell array forming region such that the major axes are set in the first direction and the second columnar members continue to ends of the arrays, and forming, in the same manner as above, third columnar members, which continue to arrays of the first columnar members in the second direction.
    Type: Application
    Filed: September 4, 2009
    Publication date: October 14, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hiroyuki Nansei, Toshiharu Tanaka, Hirokazu Kikuchi
  • Patent number: 7675107
    Abstract: A semiconductor memory device, firstly, has both the thickness of a tunnel film and that of a top film provided thereon and configured to be in the FN tunneling region (4 nm or more). The data retention characteristics can be improved by configuring both the thickness of a tunnel film and that of a top film to have a thickness of in the FN tunneling region. Secondly, a high-concentration impurity region of a conductivity type the same as that of the substrate is provided in a substrate region arranged between assist gates provided adjacently to each other. The aforementioned high-concentration impurity region makes a depletion layer extremely thin when bias is applied to the assist gates. Hot holes generated between bands in the depletion region are injected into a charge storage region and the holes and electrons make pairs and disappear, enabling easy data erasing.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: March 9, 2010
    Assignee: Spansion LLC
    Inventor: Hiroyuki Nansei
  • Publication number: 20100022081
    Abstract: A semiconductor memory device with the thickness of both a tunnel film and a top film provided thereon configured to be in the FN tunneling region (4 nm or more). Data retention characteristics can be improved by configuring both a tunnel film and a top film to have a thickness in the FN tunneling region. Secondly, a high-concentration impurity region of a conductivity type the same as that of the substrate is provided in a substrate region arranged between assist gates provided adjacently to each other. The aforementioned high-concentration impurity region makes a depletion layer extremely thin when bias is applied to the assist gates. Hot holes generated between bands in the depletion region are injected into a charge storage region and the holes and electrons make pairs and disappear, enabling easy data erasing.
    Type: Application
    Filed: October 7, 2009
    Publication date: January 28, 2010
    Inventor: Hiroyuki NANSEI
  • Publication number: 20090085213
    Abstract: A semiconductor memory device employs a SONOS type memory architecture and includes a bit line diffusion layer in a shallow trench groove in which a conductive film is buried. This makes it possible to decrease the resistivity of the bit line diffusion layer without enlarging the area on the main surface of the semiconductor substrate, and to fabricate the semiconductor memory device having stable electric characteristics without enlarging the cell area. The bit line is formed by implanting ions into the sidewall of Si3N4.
    Type: Application
    Filed: August 27, 2008
    Publication date: April 2, 2009
    Inventors: Masahiko HIGASHI, Hiroyuki Nansei
  • Publication number: 20090020799
    Abstract: One embodiment in accordance with the invention can include a semiconductor device that includes: a groove that is formed in a semiconductor substrate; bottom oxide films that are formed on both side faces of the groove; two charge storage layers that are formed on side faces of the bottom oxide films; top oxide films that are formed on side faces of the two charge storage layers; and a silicon oxide layer that is formed on the bottom face of the groove, and has a smaller film thickness than the top oxide films.
    Type: Application
    Filed: December 28, 2007
    Publication date: January 22, 2009
    Inventor: Hiroyuki Nansei
  • Patent number: 7479427
    Abstract: A semiconductor memory device employs a SONOS type memory architecture and includes a bit line diffusion layer in a shallow trench groove in which a conductive film is buried. This makes it possible to decrease the resistivity of the bit line diffusion layer without enlarging the area on the main surface of the semiconductor substrate, and to fabricate the semiconductor memory device having stable electric characteristics without enlarging the cell area. The bit line is formed by implanting ions into the sidewall of Si3N4.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: January 20, 2009
    Assignee: Spansion LLC
    Inventors: Masahiko Higashi, Hiroyuki Nansei
  • Publication number: 20080265309
    Abstract: After an ONO film in which a silicon nitride film (22) formed by a plasma nitriding method using a plasma processor having a radial line slot antenna is sandwiched by silicon oxide films (21), (23), a bit line diffusion layer (17) is formed in a memory cell array region (11) by an ion implantation as a resist pattern (16) taken as a mask, then lattice defects are given to the silicon nitride film (22) by a further ion implantation. Accordingly, a highly reliable semiconductor memory device can be realized, in which a high quality nitride film is formed in a low temperature condition, in addition, the nitride film can be used as a charge trap film having a charge capture function sufficiently adaptable for a miniaturization and a high integration which are recent demands.
    Type: Application
    Filed: June 20, 2008
    Publication date: October 30, 2008
    Applicant: SPANSION LLC
    Inventors: Masahiko Higashi, Manabu Nakamura, Kentaro Sera, Hiroyuki Nansei, Yukihiro Utsuno, Hideo Takagi, Tatsuya Kajita
  • Publication number: 20080217673
    Abstract: A semiconductor device includes a stack structure in which multiple channel layers are stacked on a substrate so as to be sandwiched between bit line layers, a gate electrode that is provided to the side of the lateral surface of an interior of a groove portion formed within the stack structure, and a charge storage layer that is provided between the gate electrode and the channel layer.
    Type: Application
    Filed: February 5, 2008
    Publication date: September 11, 2008
    Applicant: Spansion LLC
    Inventors: Takayuki Maruyama, Yukio Hayakawa, Hiroyuki Nansei
  • Patent number: 7410857
    Abstract: After an ONO film in which a silicon nitride film (22) formed by a plasma nitriding method using a plasma processor having a radial line slot antenna is sandwiched by silicon oxide films (21), (23), a bit line diffusion layer (17) is formed in a memory cell array region (11) by an ion implantation as a resist pattern (16) taken as a mask, then lattice defects are given to the silicon nitride film (22) by a further ion implantation. Accordingly, a highly reliable semiconductor memory device can be realized, in which a high quality nitride film is formed in a low temperature condition, in addition, the nitride film can be used as a charge trap film having a charge capture function sufficiently adaptable for a miniaturization and a high integration which are recent demands.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: August 12, 2008
    Assignee: Spansion LLC.
    Inventors: Masahiko Higashi, Manabu Nakamura, Kentaro Sera, Hiroyuki Nansei, Yukihiro Utsuno, Hideo Takagi, Tatsuya Kajita
  • Publication number: 20080157183
    Abstract: The present invention provides a semiconductor device that has a shorter distance between the bit lines and easily achieves higher storage capacity and density, and a method of manufacturing such a semiconductor device. The semiconductor device includes: first bit lines formed on a substrate; an insulating layer that is provided between the first bit lines on the substrate, and has a higher upper face than the first bit lines; channel layers that are provided on both side faces of the insulating layer, and are coupled to the respective first bit lines; and charge storage layers that are provided on the opposite side faces of the channel layers from the side faces on which the insulating layers are formed.
    Type: Application
    Filed: December 17, 2007
    Publication date: July 3, 2008
    Inventors: Yukio Hayakawa, Hiroyuki Nansei
  • Publication number: 20080142874
    Abstract: A method for forming an integrated circuit system is provided including forming a substrate; forming a stack over the substrate, the stack having a sidewall and formed from a charge trap layer and a semi-conducting layer; and slot plane antenna oxidizing the stack for forming a protection enclosure having a protection layer along the sidewall.
    Type: Application
    Filed: December 16, 2006
    Publication date: June 19, 2008
    Applicants: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Shenqing Fang, Rinji Sugino, Jayendra Bhakta, Takashi Orimoto, Hiroyuki Nansei, Yukio Hayakawa, Hidehiko Shiraiwa, Takayuki Maruyama, Kuo-Tung Chang, YouSeok Suh, Amol Ramesh Joshi, Harpreet Sachar, Simon Siu-Sing Chan
  • Publication number: 20080083946
    Abstract: A memory cell system is provided including forming a first insulator layer over a semiconductor substrate, forming a charge trap layer over the first insulator layer, and slot plane antenna plasma oxidizing the charge trap layer for forming a second insulator layer.
    Type: Application
    Filed: October 10, 2006
    Publication date: April 10, 2008
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Shenqing Fang, Rinji Sugino, Jayendra Bhakta, Takashi Orimoto, Hiroyuki Nansei, Yukio Hayakawa, Takayuki Maruyama, Hidehiko Shiraiwa, Kuo-Tung Chang, Lei Xue, Meng Ding, Amol Ramesh Joshi, YouSeok Suh, Harpreet Sachar
  • Publication number: 20070262374
    Abstract: After an ONO film in which a silicon nitride film (22) formed by a plasma nitriding method using a plasma processor having a radial line slot antenna is sandwiched by silicon oxide films (21), (23), a bit line diffusion layer (17) is formed in a memory cell array region (11) by an ion implantation as a resist pattern (16) taken as a mask, then lattice defects are given to the silicon nitride film (22) by a further ion implantation. Accordingly, a highly reliable semiconductor memory device can be realized, in which a high quality nitride film is formed in a low temperature condition, in addition, the nitride film can be used as a charge trap film having a charge capture function sufficiently adaptable for a miniaturization and a high integration which are recent demands.
    Type: Application
    Filed: July 23, 2007
    Publication date: November 15, 2007
    Applicant: SPANSION LLC
    Inventors: Masahiko Higashi, Manabu Nakamura, Kentaro Sera, Hiroyuki Nansei, Yukihiro Utsuno, Hideo Takagi, Tatsuya Kajita