Patents by Inventor Shuichiro Yasuda

Shuichiro Yasuda 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: 9263670
    Abstract: A memory element and a memory device, the memory element including a first electrode, a memory layer, and a second electrode in this order. The memory layer includes a resistance change layer provided on the first electrode side, and an ion source layer provided on the second electrode side and is higher in resistance value than the resistance change layer. A resistance value of the resistance change layer is changeable in response to a composition change by applied voltage to the first and second electrodes.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: February 16, 2016
    Assignee: SONY CORPORATION
    Inventors: Shuichiro Yasuda, Hiroaki Sei, Akira Kouchiyama, Masayuki Shimuta, Naomi Yamada
  • Patent number: 9240549
    Abstract: A memory component including first and second electrodes with a memory layer therebetween, the memory layer having first and second memory layers, the first memory layer containing aluminum and a chalcogen element of tellurium, the second memory layer between the first memory layer and the first electrode and containing an aluminum oxide and at least one of a transition metal oxide and a transition metal oxynitride having a lower resistance than the aluminum oxide.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: January 19, 2016
    Assignee: SONY CORPORATION
    Inventors: Kazuhiro Ohba, Shuichiro Yasuda, Tetsuya Mizuguchi, Katsuhisa Aratani, Masayuki Shimuta, Akira Kouchiyama, Mayumi Ogasawara
  • Patent number: 9231200
    Abstract: A memory element includes: a memory layer disposed between a first electrode and a second electrode. The memory layer includes: an ion source layer containing one or more metallic elements, and one or more chalcogen elements of tellurium (Te), sulfur (S), and selenium (Se); and a resistance change layer disposed between the ion source layer and the first electrode, the resistance change layer including a layer which includes tellurium and nitrogen (N) and is in contact with the ion source layer.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: January 5, 2016
    Assignee: SONY CORPORATION
    Inventors: Tetsuya Mizuguchi, Shuichiro Yasuda, Masayuki Shimuta, Kazuhiro Ohba, Katsuhisa Aratani
  • Patent number: 9209388
    Abstract: Some embodiments include a memory cell that has an electrode, a switching material over the electrode, a buffer region over the switching material, and an ion reservoir material over the buffer region. The buffer region includes one or more elements from Group 14 of the periodic table in combination with one or more chalcogen elements. Some embodiments include methods of forming memory cells.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: December 8, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Christopher W. Petz, Dale W. Collins, Scott E. Sills, Shuichiro Yasuda
  • Patent number: 9202560
    Abstract: There are provided a memory element and a memory device excellently operating at a low current, and having the satisfactory retention characteristics. The memory element includes a first electrode, a memory layer, and a second electrode in this order. The memory layer includes a resistance change layer disposed on the first electrode side, and being in a single- or multi-layer structure including a layer containing a highest percentage of tellurium (Te) as an anionic component, and an ion source layer disposed on the second electrode side, and containing a metallic element and one or more chalcogen elements including tellurium (Te), sulfur (S), and selenium (Se) with aluminum (Al) of 27.7 atomic % or more but 47.4 atomic % or less.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: December 1, 2015
    Assignee: SONY CORPORATION
    Inventors: Tetsuya Mizuguchi, Kazuhiro Ohba, Shuichiro Yasuda, Masayuki Shimuta, Akira Kouchiyama, Hiroaki Sei
  • Patent number: 9203018
    Abstract: A memory element with a first electrode, a memory layer, and a second electrode in this order. The memory layer includes a resistance change layer provided on the first electrode side, an ion source layer provided on the second electrode side, an intermediate layer provided between the resistance change layer and the ion source layer, and a barrier layer provided at least either between the ion source layer and the intermediate layer, or between the intermediate layer and the resistance change layer.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: December 1, 2015
    Assignee: SONY CORPORATION
    Inventors: Kazuhiro Ohba, Takeyuki Sone, Masayuki Shimuta, Shuichiro Yasuda
  • Patent number: 9112149
    Abstract: A memory element with reduced degradation of memory characteristics that is caused by deterioration of a memory layer, a method of manufacturing the memory element, and a memory device are provided. The memory element includes a first electrode, a memory layer, and a second electrode in this order. The memory layer includes a resistance change layer containing fluoride, and an ion source layer disposed between the resistance change layer and the second electrode.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: August 18, 2015
    Assignee: SONY CORPORATION
    Inventors: Hiroaki Sei, Shuichiro Yasuda, Masayuki Shimuta, Katsuhisa Aratani, Akira Kouchiyama, Tetsuya Mizuguchi, Kazuhiro Ohba
  • Patent number: 9058873
    Abstract: A memory element includes: a first electrode, a memory layer, and a second electrode in this order. The memory layer includes a resistance change layer provided on the first electrode side, and an ion source layer containing one or more of metallic elements, and the ion source layer being provided on the second electrode side. The ion source layer includes a first ion source layer and a second ion source layer, the first ion source layer containing one or more of chalcogen elements of tellurium (Te), sulfur (S), and selenium (Se) and being provided on the resistance change layer side, and the second ion source layer containing the chalcogen element with a content different from a content in the first ion source layer and being provided on the second electrode side.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: June 16, 2015
    Assignee: SONY CORPORATION
    Inventors: Masayuki Shimuta, Shuichiro Yasuda, Tetsuya Mizuguchi, Kazuhiro Ohba, Katsuhisa Aratani
  • Publication number: 20150140776
    Abstract: Some embodiments include a method of forming a memory cell. A first portion of a switching region is formed over a first electrode. A second portion of the switching region is formed over the first portion using atomic layer deposition. The second portion is a different composition than the first portion. An ion source region is formed over the switching region. A second electrode is formed over the ion source region. Some embodiments include a memory cell having a switching region between a pair of electrodes. The switching region is configured to be reversibly transitioned between a low resistive state and a high resistive state. The switching region includes two or more discrete portions, with one of the portions not having a non-oxygen component in common with any composition directly against it in the high resistive state.
    Type: Application
    Filed: December 29, 2014
    Publication date: May 21, 2015
    Inventors: Shuichiro Yasuda, Noel Rocklein, Scott E. Sills, Durai Vishal Nirmal Ramaswamy, Qian Tao
  • Publication number: 20150123065
    Abstract: Some embodiments include a memory cell that has an electrode, a switching material over the electrode, a buffer region over the switching material, and an ion reservoir material over the buffer region. The buffer region includes one or more elements from Group 14 of the periodic table in combination with one or more chalcogen elements. Some embodiments include methods of forming memory cells.
    Type: Application
    Filed: November 1, 2013
    Publication date: May 7, 2015
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Christopher W. Petz, Dale W. Collins, Scott E. Sills, Shuichiro Yasuda
  • Publication number: 20150072499
    Abstract: A method of making memory element, including: a first electrode, a memory layer, and a second electrode in this order. The memory layer includes a resistance change layer containing an oxide, and the resistance change layer being provided on the first electrode side, and an ion source layer in a stacking structure of two or more of a unit ion source layer, the unit ion source layer including a first layer and a second layer, the first layer containing one or more of chalcogen elements of tellurium (Te), sulfur (S), and selenium (Se) and an easy-to-move element that is easy to move in the memory layer, and having a density distribution of the easy-to-move element from the first electrode to the second electrode, and the second layer containing a difficult-to-move element that is difficult to move in the memory layer.
    Type: Application
    Filed: November 13, 2014
    Publication date: March 12, 2015
    Inventors: Kazuhiro Ohba, Tetsuya Mizuguchi, Shuichiro Yasuda, Masayuki Shimuta, Katsuhisa Aratani
  • Publication number: 20150041746
    Abstract: A method of manufacture of a non-volatile memory system comprising: forming a dielectric layer having a hole; depositing a first electrode in the hole of the dielectric layer; applying an ion source layer over the first electrode; and depositing a second electrode over the ion source layer including: depositing an interface layer on the ion source layer, and applying a cap layer on the interface layer.
    Type: Application
    Filed: August 9, 2013
    Publication date: February 12, 2015
    Applicant: SONY CORPORATION
    Inventors: Shuichiro Yasuda, Dale Collins, Scott E. Sills
  • Patent number: 8921821
    Abstract: Some embodiments include a method of forming a memory cell. A first portion of a switching region is formed over a first electrode. A second portion of the switching region is formed over the first portion using atomic layer deposition. The second portion is a different composition than the first portion. An ion source region is formed over the switching region. A second electrode is formed over the ion source region. Some embodiments include a memory cell having a switching region between a pair of electrodes. The switching region is configured to be reversibly transitioned between a low resistive state and a high resistive state. The switching region includes two or more discrete portions, with one of the portions not having a non-oxygen component in common with any composition directly against it in the high resistive state.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: December 30, 2014
    Assignee: Micron Technology, Inc.
    Inventors: Shuichiro Yasuda, Noel Rocklein, Scott E. Sills, D. V. Nirmal Ramaswamy, Qian Tao
  • Publication number: 20140376301
    Abstract: A memory element includes: a memory layer disposed between a first electrode and a second electrode. The memory layer includes: an ion source layer containing one or more metallic elements, and one or more chalcogen elements of tellurium (Te), sulfur (S), and selenium (Se); and a resistance change layer disposed between the ion source layer and the first electrode, the resistance change layer including a layer which includes tellurium and nitrogen (N) and is in contact with the ion source layer.
    Type: Application
    Filed: September 4, 2014
    Publication date: December 25, 2014
    Inventors: Tetsuya Mizuguchi, Shuichiro Yasuda, Masayuki Shimuta, Kazuhiro Ohba, Katsuhisa Aratani
  • Patent number: 8912516
    Abstract: A memory element, including: a first electrode, a memory layer, and a second electrode in this order. The memory layer includes a resistance change layer containing an oxide, and the resistance change layer being provided on the first electrode side, and an ion source layer in a stacking structure of two or more of a unit ion source layer, the unit ion source layer including a first layer and a second layer, the first layer containing one or more of chalcogen elements of tellurium (Te), sulfur (S), and selenium (Se) and an easy-to-move element that is easy to move in the memory layer, and having a density distribution of the easy-to-move element from the first electrode to the second electrode, and the second layer containing a difficult-to-move element that is difficult to move in the memory layer.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: December 16, 2014
    Assignee: Sony Corporation
    Inventors: Kazuhiro Ohba, Tetsuya Mizuguchi, Shuichiro Yasuda, Masayuki Shimuta, Katsuhisa Aratani
  • Patent number: 8885385
    Abstract: A memory element includes: a memory layer disposed between a first electrode and a second electrode. The memory layer includes: an ion source layer containing one or more metallic elements, and one or more chalcogen elements of tellurium (Te), sulfur (S), and selenium (Se); and a resistance change layer disposed between the ion source layer and the first electrode, the resistance change layer including a layer which includes tellurium and nitrogen (N) and is in contact with the ion source layer.
    Type: Grant
    Filed: June 2, 2012
    Date of Patent: November 11, 2014
    Assignee: Sony Corporation
    Inventors: Tetsuya Mizuguchi, Shuichiro Yasuda, Masayuki Shimuta, Kazuhiro Ohba, Katsuhisa Aratani
  • Patent number: 8873281
    Abstract: A memory element capable of simultaneously satisfying the number of repeating operation times and a low-voltage operation characteristic which are in a tradeoff relation is provided. The memory element has a high-resistivity layer and an ion source layer between a bottom electrode and a top electrode. The high-resistivity layer is made of an oxide containing Te. Any of elements other than Te such as Al, Zr, Ta, Hf, Si, Ge, Ni, Co, Cu, and Au may be added. In the case of adding Al to Te and also adding Cu and Zr, the composition ratio of the high-resistivity layer is preferably adjusted in the ranges of 30?Te?100 atomic %, 0?Al?70 atomic %, and 0?Cu+Zr?36 atomic % except for oxygen. The ion source layer is made of at least one kind of metal elements and at least one kind of chalcogen elements of Te, S, and Se.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: October 28, 2014
    Assignee: Sony Corporation
    Inventors: Tetsuya Mizuguchi, Shuichiro Yasuda, Satoshi Sasaki, Naomi Yamada
  • Publication number: 20140306172
    Abstract: An integrated circuit system, and a method of manufacture thereof, including: an integrated circuit die having an address switch; a bottom electrode contact, free of halogen constituents, characteristic of a chemical vapor deposition or an atomic layer deposition, and coupled to the address switch; a transition material layer directly on the bottom electrode contact; and a top electrode contact, directly on the transition material layer, for forming a non-volatile memory array on the integrated circuit die.
    Type: Application
    Filed: April 12, 2013
    Publication date: October 16, 2014
    Applicant: Sony Corporation
    Inventors: Scott Sills, Muralikrishnan Balakrishnan, Beth Cook, Durai Vishak Nirmal Ramaswamy, Shuichiro Yasuda
  • Patent number: 8847194
    Abstract: A memory component having a first electrode; a second electrode; and a memory layer between the first and second electrodes. The memory layer includes (a) on a first electrode side thereof, a high resistance layer that is composed of a plurality of layers, at least one of the plurality of layers including tellurium (Te) as the chief component among anion components, and (b) on a second electrode side thereof, an ion source layer with at least one kind of metal element and at least one kind of chalcogen element selected from the group consisting of tellurium (Te), sulfur (S) and selenium (Se). The memory component is configured to change a resistance of the high resistance layer in accordance with a voltage or current pulse stress applied between the first and second electrodes.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: September 30, 2014
    Assignee: Sony Corporation
    Inventors: Shuichiro Yasuda, Katsuhisa Aratani, Kazuhiro Ohba, Hiroaki Sei
  • Patent number: 8835895
    Abstract: A resistive-change memory element-containing memory device including: a first memory element that includes a first resistive-change layer and a first electrode connected to the first resistive-change layer; and a second memory element that includes a second resistive-change layer and a second electrode connected to the second resistive-change layer, wherein at least one of the thickness and the material of the second resistive-change layer and the area of the second electrode in contact with the second resistive-change layer is different from the corresponding one of the thickness and the material of the first resistive-change layer and the area of the first electrode in contact with the first resistive-change layer.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: September 16, 2014
    Assignee: Sony Corporation
    Inventors: Jun Sumino, Shuichiro Yasuda