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).
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Patent number: 11004494Abstract: 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: GrantFiled: February 4, 2019Date of Patent: May 11, 2021Assignee: 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
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Publication number: 20190172517Abstract: 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: ApplicationFiled: February 4, 2019Publication date: June 6, 2019Applicant: 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
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Patent number: 10242726Abstract: 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: GrantFiled: November 5, 2018Date of Patent: March 26, 2019Assignee: 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
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Patent number: 10153027Abstract: 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: GrantFiled: August 21, 2018Date of Patent: December 11, 2018Assignee: 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
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Patent number: 10083734Abstract: 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: GrantFiled: November 6, 2017Date of Patent: September 25, 2018Assignee: 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
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Publication number: 20150333117Abstract: 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: ApplicationFiled: December 10, 2013Publication date: November 19, 2015Inventors: Nobuyuki Sako, Eiji Hasunuma, Keisuke Otsuka
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Patent number: 9147686Abstract: 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: GrantFiled: October 12, 2011Date of Patent: September 29, 2015Assignee: PS4 Luxco S.a.r.l.Inventors: Nobuyuki Sako, Eiji Hasunuma
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Patent number: 8847353Abstract: 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: GrantFiled: December 19, 2011Date of Patent: September 30, 2014Assignee: PS4 Luxco S.A.R.L.Inventor: Eiji Hasunuma
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Patent number: 8786000Abstract: 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: GrantFiled: December 28, 2011Date of Patent: July 22, 2014Assignee: PS4 Luxco S.A.R.L.Inventor: Eiji Hasunuma
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Patent number: 8378499Abstract: 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: GrantFiled: December 6, 2011Date of Patent: February 19, 2013Assignee: Elpida Memory, Inc.Inventor: Eiji Hasunuma
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Publication number: 20120161281Abstract: 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: ApplicationFiled: December 28, 2011Publication date: June 28, 2012Applicant: ELPIDA MEMORY, INC.Inventor: Eiji HASUNUMA
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Publication number: 20120153436Abstract: 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: ApplicationFiled: December 19, 2011Publication date: June 21, 2012Applicant: ELPIDA MEMORY, INC.Inventor: EIJI HASUNUMA
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Publication number: 20120132972Abstract: 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: ApplicationFiled: December 6, 2011Publication date: May 31, 2012Applicant: ELPIDA MEMORY, INC.Inventor: Eiji HASUNUMA
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Publication number: 20120100678Abstract: 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: ApplicationFiled: October 12, 2011Publication date: April 26, 2012Applicant: ELPIDA MEMORY, INC.Inventors: Nobuyuki SAKO, Eiji HASUNUMA
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Patent number: 8105907Abstract: 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: GrantFiled: January 29, 2010Date of Patent: January 31, 2012Assignee: Elpida Memory, Inc.Inventors: Eiji Hasunuma, Shigeru Shiratake, Takeshi Ohgami
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Patent number: 8093724Abstract: 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: GrantFiled: March 15, 2007Date of Patent: January 10, 2012Assignee: Elpida Memory, Inc.Inventor: Eiji Hasunuma
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Publication number: 20110189828Abstract: 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: ApplicationFiled: December 13, 2010Publication date: August 4, 2011Applicant: Elpida Memory, Inc.Inventors: Nobuyuki Sako, Eiji Hasunuma, Yuki Togashi
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Publication number: 20100197097Abstract: 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: ApplicationFiled: January 29, 2010Publication date: August 5, 2010Applicant: ELPIDA MEMORY, INC.Inventors: Eiji HASUNUMA, Shigeru SHIRATAKE, Takeshi OHGAMI
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Patent number: 7723184Abstract: 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: GrantFiled: November 21, 2007Date of Patent: May 25, 2010Assignee: Elpida Memory, Inc.Inventor: Eiji Hasunuma
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Patent number: RE47240Abstract: 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: GrantFiled: January 10, 2014Date of Patent: February 12, 2019Inventor: Eiji Hasunuma