Patents by Inventor Takashi Ando

Takashi Ando 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: 20240088065
    Abstract: A non-volatile memory (NVM) structure is provided including a proximity heater or a localized heater that is configured to generate Joule heating to increase temperature of a ferroelectric material layer of a ferroelectric memory device higher than a Currie temperature of the ferroelectric material layer. The Joule heating is trigged when tampering in the NVM structure is detected and as a result of the Joule heating memory erasure can occur.
    Type: Application
    Filed: September 8, 2022
    Publication date: March 14, 2024
    Inventors: Nanbo Gong, Takashi Ando, Guy M. Cohen
  • Patent number: 11929404
    Abstract: A semiconductor structure comprises a gate structure of a transistor. The gate structure comprises a gate conductive portion disposed on a gate dielectric layer. The semiconductor structure further comprises a capacitor structure disposed on the gate structure. The capacitor structure comprises a first conductive layer, a dielectric layer disposed on the first conductive layer and a second conductive layer disposed on the dielectric layer. The first and second conductive layers are respectively connected to a first contact portion and a second contact portion.
    Type: Grant
    Filed: September 1, 2021
    Date of Patent: March 12, 2024
    Assignee: International Business Machines Corporation
    Inventors: Alexander Reznicek, Takashi Ando, Bahman Hekmatshoartabari, Nanbo Gong
  • Patent number: 11921845
    Abstract: The present invention is provided with a threat analysis processing unit that, on the basis of an analysis result from the vulnerability analysis unit, analyzes a threat to the system and outputs a threat analysis result; a countermeasure planning unit that, on the basis of the threat analysis result and vulnerability information, plans the countermeasure plan which reduces the impact of the vulnerability; a security test planning unit that plans the security test on the basis of the countermeasure plan; an evaluation calculation unit that performs an evaluation on the basis of the security test, and outputs an evaluation result; and a result processing unit that processes the evaluation result and generates a security countermeasure.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: March 5, 2024
    Assignee: HITACHI, LTD.
    Inventors: Takashi Kawauchi, Chinatsu Yamauchi, Yiwen Chen, Eriko Ando
  • Patent number: 11923458
    Abstract: An approach for representing both positive and negative weights in neuromorphic computing is disclosed. The approach leverages a double gate FeFET (ferroelectric field effect transistor) device. The device leverages a double-gate FeFET with four terminals (two separate gates and source and drain) and ferroelectric gate dielectric. The device may have a junction-less channel. A synaptic weight is programmed by biasing one of the two gates. The store weight is sensed via a current flow from source to drain. A pre-defined bias is applied to the other gate during the sensing, such that a reference current is subtracted from the drain current. The net current for sensing is current from the synaptic devices subtracted by the pre-defined reference current.
    Type: Grant
    Filed: June 2, 2021
    Date of Patent: March 5, 2024
    Assignee: International Business Machines Corporation
    Inventors: Takashi Ando, Guy M. Cohen, Nanbo Gong
  • Publication number: 20240074207
    Abstract: A semiconductor device includes a ferroelectric random-access memory (FeRAM) cell. The FeRAM includes a ferroelectric dielectric that is annealed to attain its ferroelectric phase by an induced current flow and heating process. The current flow may be induced though a temporary wire that causes heating of the FeRAM cell. The resulting heating or anneal of the ferroelectric dielectric may crystalize the ferroelectric dielectric to embody or result in having ferroelectric properties. The induced current flow and heating process is substantially local to the FeRAM cell, and to ferroelectric dielectric therein, as opposed to a global heating or annealing process in which the entire semiconductor device, or a relatively larger region of semiconductor device, is heated to the requisite annealing temperature of ferroelectric dielectric.
    Type: Application
    Filed: August 25, 2022
    Publication date: February 29, 2024
    Inventors: Nanbo Gong, Takashi Ando, Guy M. Cohen, HIROYUKI MIYAZOE
  • Patent number: 11916099
    Abstract: A semiconductor device is provided. The semiconductor device includes: a first conductive electrode; a first dielectric stack structure provided on the first conductive electrode; a second conductive electrode provided on the first dielectric stack structure; a second dielectric stack structure provided on the second conductive electrode; and a third conductive electrode provided on the first dielectric stack structure, wherein each of the first dielectric stack structure and the second dielectric stack structure include a first dielectric layer comprising a first material; a second ferroelectric dielectric layer comprising a second material and provided on the first dielectric layer, and a third dielectric layer comprising a third material and provided on the second ferroelectric dielectric layer.
    Type: Grant
    Filed: June 8, 2021
    Date of Patent: February 27, 2024
    Assignee: International Business Machines Corporation
    Inventors: Takashi Ando, Reinaldo Vega, David Wolpert, Cheng Chi, Praneet Adusumilli
  • Patent number: 11916014
    Abstract: A field effect device is provided. The field effect device includes an active gate structure, a gate contact within the active gate structure, wherein the gate contact is the same height as the active gate structure, and a gate cut dielectric on opposite sides of the gate contact and active gate structure.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: February 27, 2024
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Reinaldo Vega, Takashi Ando, Cheng Chi, Praneet Adusumilli
  • Patent number: 11915926
    Abstract: A porous thin film includes a framework that includes a plurality of pores. The pores extend from an opening located at an upper surface of the framework to a bottom surface contained in the framework. A pore-coating film is formed on sidewalls and the bottom surface of the pores.
    Type: Grant
    Filed: September 27, 2021
    Date of Patent: February 27, 2024
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Leonidas Ernesto Ocola, Eric A. Joseph, Hiroyuki Miyazoe, Takashi Ando, Damon Brooks Farmer
  • Patent number: 11915734
    Abstract: A spin-orbit torque magnetoresistive random-access memory device formed by fabricating a spin-Hall-effect (SHE) layer above and in electrical contact with a transistor, forming a spin-orbit-torque (SOT) magnetoresistive random access memory (MRAM) cell stack disposed above and in electrical contact with the SHE rail, wherein the SOT-MRAM cell stack comprises a free layer, a tunnel junction layer, and a reference layer, forming a cylindrical diode structure above and in electrical contact with the SOT-MRAM cell stack, forming a write line disposed in electrical contact with the SHE rail, and forming a read line disposed above and adjacent to an outer cylindrical electrode of the diode structure.
    Type: Grant
    Filed: August 13, 2021
    Date of Patent: February 27, 2024
    Assignee: International Business Machines Corporation
    Inventors: Pouya Hashemi, Takashi Ando, Alexander Reznicek
  • Patent number: 11915751
    Abstract: A method for forming a nonvolatile PCM logic device may include providing a PCM film component having a first end contact distally opposed from a second end contact, positing a first proximity adjacent to a first surface of the PCM film component, positing a second proximity heater adjacent to a second surface of the PCM film component, wherein the first proximity heater and the second proximity heater are electrically isolated from the PCM film component. The method may further include applying a combination of pulses to one or more of the first proximity heater and the second proximity heater to change a resistance value of the PCM film component corresponding to a logic truth table. Further, the method may include simultaneously applying a first combination of reset pulses to program, or set pulses to initialize, the PCM film component, to the first proximity heater and the second proximity heater.
    Type: Grant
    Filed: September 13, 2021
    Date of Patent: February 27, 2024
    Assignee: International Business Machines Corporation
    Inventors: Guy M. Cohen, Nanbo Gong, Takashi Ando
  • Patent number: 11910734
    Abstract: A structure including a bottom electrode, a phase change material layer vertically aligned and an ovonic threshold switching layer vertically aligned above the phase change material layer. A structure including a bottom electrode, a phase change material layer and an ovonic threshold switching layer vertically aligned above the phase change material layer, and a first barrier layer physically separating the ovonic threshold switching layer from a top electrode. A method including forming a structure including a liner vertically aligned above a first barrier layer, the first barrier layer vertically aligned above a phase change material layer, the phase change material layer vertically aligned above a bottom electrode, forming a dielectric surrounding the structure, and forming an ovonic threshold switching layer on the first barrier layer, vertical side surfaces of the first buffer layer are vertically aligned with the first buffer layer, the phase change material layer and the bottom electrode.
    Type: Grant
    Filed: May 4, 2023
    Date of Patent: February 20, 2024
    Assignee: International Business Machines Corporation
    Inventors: Nanbo Gong, Takashi Ando, Robert L. Bruce, Alexander Reznicek, Bahman Hekmatshoartabari
  • Patent number: 11901002
    Abstract: System and method to localize a position of an RRAM filament of resistive memory device at very low bias voltages using a scanning laser beam. The approach is non-invasive and allows measurement of a large number of devices for creating statistics relating to the filament formation. A laser microscope system is configured to perform a biasing the RRAM cell with voltage (or current). Concurrent to the applied bias, a laser beam is generated and aimed at different positions of the RRAM cell (e.g., by a raster scanning). Changes in the current (or voltage) flowing through the cell are measured. The method creates a map of the current (or voltage) changes at the different laser positions and detects a spot in the map corresponding to higher (or lower) current (or voltage). The method determines the (x,y) position of the spot compared to the edge/center of the RRAM cell.
    Type: Grant
    Filed: December 1, 2021
    Date of Patent: February 13, 2024
    Assignee: International Business Machines Corporation
    Inventors: Franco Stellari, Ernest Y. Wu, Takashi Ando, Peilin Song
  • Publication number: 20240040940
    Abstract: Embodiments of present invention provide a resistive random-access memory (RRAM) cell. The RRAM cell includes a bottom electrode; a metal oxide layer, the metal oxide layer having a central portion that is in direct contact with the bottom electrode, a peripheral portion that is nonplanar with the central portion, and a vertical portion between the central portion and the peripheral portion; and a top electrode directly above the metal oxide layer. A method of manufacturing the RRAM cell is also provided.
    Type: Application
    Filed: July 28, 2022
    Publication date: February 1, 2024
    Inventors: Soon-Cheon Seo, Min Gyu Sung, Takashi Ando, CHANRO PARK, Mary Claire Micaller Silvestre, Xuefeng Liu
  • Publication number: 20240006346
    Abstract: An integrated circuit includes a semiconductor substrate; a logic area, located outward of the semiconductor substrate; and a physically unclonable function (PUF) area, located outward of the semiconductor substrate. The logic area includes a plurality of logic metal-insulator-metal decoupling capacitors with at least three plates. The PUF area includes a plurality of PUF metal-insulator-metal capacitors with at least three plates. Shorts and opens are avoided in the logic area, while the PUF metal-insulator-metal capacitors exhibit deliberately-introduced shorts and opens that function as a PUF.
    Type: Application
    Filed: June 30, 2022
    Publication date: January 4, 2024
    Inventors: Cheng Chi, Takashi Ando, REINALDO VEGA, Praneet Adusumilli
  • Patent number: 11864474
    Abstract: A semiconductor device is provided. The semiconductor device includes a resistive memory device, and at least a first photodetector and a second photodetector positioned adjacent to the resistive memory device to allow for measurement of the intensity of photon emission from a filament of the resistive memory device.
    Type: Grant
    Filed: March 17, 2022
    Date of Patent: January 2, 2024
    Assignee: International Business Machines Corporation
    Inventors: Takashi Ando, Franco Stellari, Guy M. Cohen, Nanbo Gong
  • Publication number: 20230420491
    Abstract: Metal-insulator-metal capacitor designs with increased reliability are provided. In one aspect, a capacitor includes: first and second electrodes; and multiple dielectric layers present in between the first and second electrodes, including a first buffer layer disposed on the first electrode, a ferroelectric film disposed on the first buffer layer, and a second buffer layer disposed on the ferroelectric film, where the ferroelectric film includes a combination of at least a first dielectric material and a second dielectric material having a higher ? value than either the first or second buffer layers. The first and second dielectric materials can each include HfO2 and/or ZrO2, in a crystalline phase, which can be combined in a common layer, or present in different layers. A capacitor device having the present capacitors stacked one on top of another is also provided, as is a method of forming the present capacitors.
    Type: Application
    Filed: June 28, 2022
    Publication date: December 28, 2023
    Inventors: Kisik Choi, Paul Charles Jamison, Takashi Ando, Lawrence A. Clevenger, Huimei Zhou, Miaomiao Wang, Ernest Y. Wu
  • Publication number: 20230422461
    Abstract: An approach to forming a semiconductor device where the semiconductor device includes a first power rail that is connected to a decoupling capacitor by way of a first gate. The decoupling capacitor is also connected to a second gate. As such, the decoupling capacitor separates the first gate from the second gate. The decoupling capacitor may include a dielectric liner within a gate cut trench and a ferroelectric material over the dielectric liner. A second power rail may be connected to the decoupling capacitor by way of the second gate. The first gate and the second gate may be inline with respect thereto.
    Type: Application
    Filed: June 22, 2022
    Publication date: December 28, 2023
    Inventors: REINALDO VEGA, Takashi Ando, Praneet Adusumilli, David Wolpert, Cheng Chi
  • Patent number: 11855180
    Abstract: A method of forming a semiconductor device that includes forming an inner dielectric spacer and outer dielectric spacer combination structure on a sacrificial gate structure that is present on a fin structure, wherein the inner dielectric spacer and outer dielectric spacer combination structure separates source and drain regions from the sacrificial gate structure. The method further includes removing the inner sidewall dielectric spacer; and forming a channel epitaxial wrap around layer on the portion of the fin structure that is exposed by removing the inner sidewall dielectric spacer. The method further includes removing the sacrificial gate structure to provide a gate opening to a channel portion of the fin structure, wherein the gate opening exposes the channel epitaxial wrap around layer; and forming a functional gate structure within the gate opening.
    Type: Grant
    Filed: September 20, 2021
    Date of Patent: December 26, 2023
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Alexander Reznicek, Takashi Ando, Jingyun Zhang, Ruilong Xie
  • Patent number: 11856798
    Abstract: A random number generator comprising resistive random-access memory (RRAM) devices including: a first electrode; a second electrode; a third electrode located between the first and second electrode; at least one electrically insulating layer separating the first electrode and the second electrode from the third electrode, wherein the at least one electrically insulating layer has a substantially uniform thickness; a first filament that is current conducting and extends through the at least one electrically insulating layer; a second filament is located in the at least one electrically insulating layer and does not extend through the at least one electrically insulating layer; a voltage source configured to apply voltage to at least one of the first electrode and the second electrode; and a voltage sensor configured to sense voltage of the third electrode in order to determine which one of the first filament or the second filament is more resistive.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: December 26, 2023
    Assignee: International Business Machines Corporation
    Inventors: Guy M. Cohen, Takashi Ando, Nanbo Gong
  • Patent number: 11855148
    Abstract: The embodiments herein describe a vertical field effect transistor (FET) with a gate that includes different work function metals (WFMs). Each WFM can be made up of one material (or one layer) or multiple materials forming multiple layers. In any case, the gate includes at least two different WFMs. For example, a first WFM may have a different material or layer than a second WFM in the gate, or one layer of the first WFM may have a different thickness than a corresponding layer in the second WFM. Having different WFMs in the gate can reduce the gate induced drain leakage (GIDL) in the FET.
    Type: Grant
    Filed: October 26, 2021
    Date of Patent: December 26, 2023
    Assignee: International Business Machines Corporation
    Inventors: Takashi Ando, Ruilong Xie, Pouya Hashemi, Alexander Reznicek