Patents by Inventor Eiji Hasunuma

Eiji Hasunuma 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: 11004494
    Abstract: Some embodiments include an assembly having active material structures arranged in an array having rows and columns. Each of the active material structures has a first side which includes a bit contact region, and has a second side which includes a cell contact region. Each of the bit contact regions is coupled with a first redistribution pad. Each of the cell contact regions is coupled with a second redistribution pad. The first redistribution pads are coupled with bitlines, and the second redistribution pads are coupled with programmable devices. Some embodiments include methods of forming memory arrays.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: May 11, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Sanh D. Tang, Kuo-Chen Wang, Martin C. Roberts, Diem Thy N. Tran, Hideki Gomi, Fredrick D. Fishburn, Srinivas Pulugurtha, Michel Koopmans, Eiji Hasunuma
  • Publication number: 20190172517
    Abstract: Some embodiments include an assembly having active material structures arranged in an array having rows and columns. Each of the active material structures has a first side which includes a bit contact region, and has a second side which includes a cell contact region. Each of the bit contact regions is coupled with a first redistribution pad. Each of the cell contact regions is coupled with a second redistribution pad. The first redistribution pads are coupled with bitlines, and the second redistribution pads are coupled with programmable devices. Some embodiments include methods of forming memory arrays.
    Type: Application
    Filed: February 4, 2019
    Publication date: June 6, 2019
    Applicant: Micron Technology, Inc.
    Inventors: Sanh D. Tang, Kuo-Chen Wang, Martin C. Roberts, Diem Thy N. Tran, Hideki Gomi, Fredrick D. Fishburn, Srinivas Pulugurtha, Michel Koopmans, Eiji Hasunuma
  • Patent number: 10242726
    Abstract: Some embodiments include an assembly having active material structures arranged in an array having rows and columns. Each of the active material structures has a first side which includes a bit contact region, and has a second side which includes a cell contact region. Each of the bit contact regions is coupled with a first redistribution pad. Each of the cell contact regions is coupled with a second redistribution pad. The first redistribution pads are coupled with bitlines, and the second redistribution pads are coupled with programmable devices. Some embodiments include methods of forming memory arrays.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: March 26, 2019
    Assignee: Micron Technology, Inc.
    Inventors: Sanh D. Tang, Kuo-Chen Wang, Martin C. Roberts, Diem Thy N. Tran, Hideki Gomi, Fredrick D. Fishburn, Srinivas Pulugurtha, Michel Koopmans, Eiji Hasunuma
  • Patent number: 10153027
    Abstract: Some embodiments include an assembly having active material structures arranged in an array having rows and columns. Each of the active material structures has a first side which includes a bit contact region, and has a second side which includes a cell contact region. Each of the bit contact regions is coupled with a first redistribution pad. Each of the cell contact regions is coupled with a second redistribution pad. The first redistribution pads are coupled with bitlines, and the second redistribution pads are coupled with programmable devices. Some embodiments include methods of forming memory arrays.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: December 11, 2018
    Assignee: Micron Technology, Inc.
    Inventors: Sanh D. Tang, Kuo-Chen Wang, Martin C. Roberts, Diem Thy N. Tran, Hideki Gomi, Fredrick D. Fishburn, Srinivas Pulugurtha, Michel Koopmans, Eiji Hasunuma
  • Patent number: 10083734
    Abstract: Some embodiments include an assembly having active material structures arranged in an array having rows and columns. Each of the active material structures has a first side which includes a bit contact region, and has a second side which includes a cell contact region. Each of the bit contact regions is coupled with a first redistribution pad. Each of the cell contact regions is coupled with a second redistribution pad. The first redistribution pads are coupled with bitlines, and the second redistribution pads are coupled with programmable devices. Some embodiments include methods of forming memory arrays.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: September 25, 2018
    Assignee: Micron Technology, Inc.
    Inventors: Sanh D. Tang, Kuo-Chen Wang, Martin C. Roberts, Diem Thy N. Tran, Hideki Gomi, Fredrick D. Fishburn, Srinivas Pulugurtha, Michel Koopmans, Eiji Hasunuma
  • Publication number: 20150333117
    Abstract: One semiconductor device includes lower electrodes arranged in rows along first and second directions parallel to the surface of a semiconductor substrate and extending in a third direction perpendicular to the surface of the substrate, a first support film arranged on the upper end of the lower electrodes and having first openings, a second support film arranged in the middle of the lower electrodes in the third direction, and having second openings aligned in a plane in the same pattern as the first openings, a capacitance insulating film covering the surface of the lower electrodes, and upper electrodes covering the surface of the capacitance insulating film. A portion of each of eight lower electrodes contained in two lower electrode unit groups adjacent in the first direction are collectively positioned inside of the first and second openings. A lower electrode unit group is four lower electrodes adjacent in the second direction.
    Type: Application
    Filed: December 10, 2013
    Publication date: November 19, 2015
    Inventors: Nobuyuki Sako, Eiji Hasunuma, Keisuke Otsuka
  • Patent number: 9147686
    Abstract: A method of forming a semiconductor device includes the following processes. A first interlayer insulating film is formed over a cell transistor and a peripheral transistor. A cell contact hole is formed in the first interlayer insulating film, the cell contact hole reaching the cell transistor. A lower contact plug is formed at a bottom of the cell contact hole. A peripheral contact hole is formed in the first interlayer insulating film, the peripheral contact hole reaching the peripheral transistor. A first peripheral contact plug is simultaneously formed in the peripheral contact hole and an upper contact plug in the cell contact hole, the upper contact plug being disposed on the lower contact plug.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: September 29, 2015
    Assignee: PS4 Luxco S.a.r.l.
    Inventors: Nobuyuki Sako, Eiji Hasunuma
  • Patent number: 8847353
    Abstract: Capacitance blocks (first block and second block) respectively formed on two different adjacent common pad electrodes are electrically connected in series through an upper electrode. A distance between two adjacent capacitance blocks connected in series through an upper electrode film for the upper electrode corresponds to a distance between opposing lower electrodes disposed in an outermost perimeter of each capacitance block, and is two or less times than a total film thickness of the upper electrode film embedded between the two adjacent capacitance blocks.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: September 30, 2014
    Assignee: PS4 Luxco S.A.R.L.
    Inventor: Eiji Hasunuma
  • Patent number: 8786000
    Abstract: A method of manufacturing a semiconductor device includes: forming a core insulating film that includes first openings, on a semiconductor substrate; forming cylindrical lower electrodes that cover sides of the first openings with a conductive film; forming a support film that covers at least an upper surface of the core insulating film between the lower electrodes; forming a mask film in which an outside of a region where at least the lower electrodes are formed is removed, by using the support film; and performing isotropic etching on the core insulating film so as to leave the core insulating film at a part of an area between the lower electrodes, after the mask film is formed.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: July 22, 2014
    Assignee: PS4 Luxco S.A.R.L.
    Inventor: Eiji Hasunuma
  • Patent number: 8378499
    Abstract: A semiconductor storage device with active regions formed in the shape of a band in a substrate; a plurality of word lines arranged at equal intervals that intersect the active regions; cell contacts that includes first cell contacts in the active regions in the center portions in a longitudinal direction, and second cell contacts at both ends in the longitudinal direction; bit line contacts on the first cell contacts; bit lines that pass over the bit line contacts; storage node contacts on the second cell contacts; storage node contact pads on the storage node contacts; and storage capacitors on the storage node contact pads. The center positions of the storage node contacts are offset from the center positions of the second cell contacts. The center positions of the storage node contact pads are offset from the center positions of the storage node contacts.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: February 19, 2013
    Assignee: Elpida Memory, Inc.
    Inventor: Eiji Hasunuma
  • Publication number: 20120161281
    Abstract: A method of manufacturing a semiconductor device includes: forming a core insulating film that includes first openings, on a semiconductor substrate; forming cylindrical lower electrodes that cover sides of the first openings with a conductive film; forming a support film that covers at least an upper surface of the core insulating film between the lower electrodes; forming a mask film in which an outside of a region where at least the lower electrodes are formed is removed, by using the support film; and performing isotropic etching on the core insulating film so as to leave the core insulating film at a part of an area between the lower electrodes, after the mask film is formed.
    Type: Application
    Filed: December 28, 2011
    Publication date: June 28, 2012
    Applicant: ELPIDA MEMORY, INC.
    Inventor: Eiji HASUNUMA
  • Publication number: 20120153436
    Abstract: Capacitance blocks (first block and second block) respectively formed on two different adjacent common pad electrodes are electrically connected in series through an upper electrode. A distance between two adjacent capacitance blocks connected in series through an upper electrode film for the upper electrode corresponds to a distance between opposing lower electrodes disposed in an outermost perimeter of each capacitance block, and is two or less times than a total film thickness of the upper electrode film embedded between the two adjacent capacitance blocks.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 21, 2012
    Applicant: ELPIDA MEMORY, INC.
    Inventor: EIJI HASUNUMA
  • Publication number: 20120132972
    Abstract: A semiconductor storage device with active regions formed in the shape of a band in a substrate; a plurality of word lines arranged at equal intervals that intersect the active regions; cell contacts that includes first cell contacts in the active regions in the center portions in a longitudinal direction, and second cell contacts at both ends in the longitudinal direction; bit line contacts on the first cell contacts; bit lines that pass over the bit line contacts; storage node contacts on the second cell contacts; storage node contact pads on the storage node contacts; and storage capacitors on the storage node contact pads. The center positions of the storage node contacts are offset from the center positions of the second cell contacts. The center positions of the storage node contact pads are offset from the center positions of the storage node contacts.
    Type: Application
    Filed: December 6, 2011
    Publication date: May 31, 2012
    Applicant: ELPIDA MEMORY, INC.
    Inventor: Eiji HASUNUMA
  • Publication number: 20120100678
    Abstract: A method of forming a semiconductor device includes the following processes. A first interlayer insulating film is formed over a cell transistor and a peripheral transistor. A cell contact hole is formed in the first interlayer insulating film, the cell contact hole reaching the cell transistor. A lower contact plug is formed at a bottom of the cell contact hole. A peripheral contact hole is formed in the first interlayer insulating film, the peripheral contact hole reaching the peripheral transistor. A first peripheral contact plug is simultaneously formed in the peripheral contact hole and an upper contact plug in the cell contact hole, the upper contact plug being disposed on the lower contact plug.
    Type: Application
    Filed: October 12, 2011
    Publication date: April 26, 2012
    Applicant: ELPIDA MEMORY, INC.
    Inventors: Nobuyuki SAKO, Eiji HASUNUMA
  • Patent number: 8105907
    Abstract: To provide a manufacturing method of a semiconductor memory device, the method including forming contact plugs to be connected to a drain region or a source region of each of transistors, by using a SAC line technique of selectively etching an insulation layer that covers each of the transistors by using a mask having a line-shaped opening provided across the contact plugs. Each of the transistors constituting a sense amplifier that amplifies a potential difference between bit lines is a ring-gate transistor.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: January 31, 2012
    Assignee: Elpida Memory, Inc.
    Inventors: Eiji Hasunuma, Shigeru Shiratake, Takeshi Ohgami
  • Patent number: 8093724
    Abstract: a semiconductor storage device is provided with a plurality of active regions formed in the shape of a band in a semiconductor substrate; a plurality of word lines arranged at equal intervals so as to intersect the active regions; a plurality of cell contacts that includes first cell contacts formed in the active regions in the center portions in the longitudinal direction thereof, and second cell contacts formed at each end portion at both ends in the longitudinal direction; bit line contacts formed on the first cell contacts; bit lines wired so as to pass over the bit line contacts; storage node contacts formed on the second cell contacts; storage node contact pads formed on the storage node contacts; and storage capacitors formed on the storage node contact pads. The center positions of the storage node contacts are offset in a prescribed direction from the center positions of the second cell contacts.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: January 10, 2012
    Assignee: Elpida Memory, Inc.
    Inventor: Eiji Hasunuma
  • Publication number: 20110189828
    Abstract: A silicon layer is formed on a silicon substrate by an epitaxial growth, and, then a surface of the silicon layer is oxidized. The surface of the silicon layer is cleaned, to remove foreign material generated on the surface of the silicon layer during the epitaxial growth.
    Type: Application
    Filed: December 13, 2010
    Publication date: August 4, 2011
    Applicant: Elpida Memory, Inc.
    Inventors: Nobuyuki Sako, Eiji Hasunuma, Yuki Togashi
  • Publication number: 20100197097
    Abstract: To provide a manufacturing method of a semiconductor memory device, the method including forming contact plugs to be connected to a drain region or a source region of each of transistors, by using a SAC line technique of selectively etching an insulation layer that covers each of the transistors by using a mask having a line-shaped opening provided across the contact plugs. Each of the transistors constituting a sense amplifier that amplifies a potential difference between bit lines is a ring-gate transistor.
    Type: Application
    Filed: January 29, 2010
    Publication date: August 5, 2010
    Applicant: ELPIDA MEMORY, INC.
    Inventors: Eiji HASUNUMA, Shigeru SHIRATAKE, Takeshi OHGAMI
  • Patent number: 7723184
    Abstract: A semiconductor device is provided which is suitable for a DRAM with word lines and configured to have a trench gate transistor and suppress an increase in the capacitance of a word line without affecting the transistor characteristics. The semiconductor device includes a trench gate transistor which is provided with: a trench which is provided with vertical sides and is formed in a semiconductor substrate; a gate electrode which is formed inside the trench via a gate dielectric film; and a source and a drain which are provided at the semiconductor substrate in the vicinity of the gate electrode via the gate dielectric film, wherein at least one of the thickness of the gate dielectric film in a region contacting the source and the thickness of the gate dielectric film in a region contacting the drain are larger than the thickness of the gate dielectric film formed inside the trench.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: May 25, 2010
    Assignee: Elpida Memory, Inc.
    Inventor: Eiji Hasunuma
  • Patent number: RE47240
    Abstract: a semiconductor storage device is provided with a plurality of active regions formed in the shape of a band in a semiconductor substrate; a plurality of word lines arranged at equal intervals so as to intersect the active regions; a plurality of cell contacts that includes first cell contacts formed in the active regions in the center portions in the longitudinal direction thereof, and second cell contacts formed at each end portion at both ends in the longitudinal direction; bit line contacts formed on the first cell contacts; bit lines wired so as to pass over the bit line contacts; storage node contacts formed on the second cell contacts; storage node contact pads formed on the storage node contacts; and storage capacitors formed on the storage node contact pads. The center positions of the storage node contacts are offset in a prescribed direction from the center positions of the second cell contacts.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: February 12, 2019
    Inventor: Eiji Hasunuma