Patents by Inventor Vijay Narayanan

Vijay Narayanan 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: 11956975
    Abstract: Structures and methods are provided for integrating a resistance random access memory (ReRAM) in a back-end-on-the-line (BEOL) fat wire level. In one embodiment, a ReRAM device area contact structure is provided in the BEOL fat wire level that has at least a lower via portion that contacts a surface of a top electrode of a ReRAM device area ReRAM-containing stack. In other embodiments, a tall ReRAM device area bottom electrode is provided in the BEOL fat wire level and embedded in a dielectric material stack that includes a dielectric capping layer and an interlayer dielectric material layer.
    Type: Grant
    Filed: September 16, 2021
    Date of Patent: April 9, 2024
    Assignee: International Business Machines Corporation
    Inventors: Soon-Cheon Seo, Dexin Kong, Takashi Ando, Paul Charles Jamison, Hiroyuki Miyazoe, Youngseok Kim, Nicole Saulnier, Vijay Narayanan, Iqbal Rashid Saraf
  • Patent number: 11877458
    Abstract: A Resistive Random-Access Memory (RRAM) has an internal electrode; a high k dielectric layer surrounding and in contact with the internal electrode; a lower substrate; and a trench having three or more trench sides disposed within the lower substrate; and one or more interconnects each with an interconnect side. The interconnect side forms part of one of the trench sides. The internal electrode and the high k dielectric layer are disposed within the trench with the interconnect side in contact with the high k dielectric layer. In some embodiments, an external electrode is between and electrically connected to the high k dielectric layer and the internal electrode. The external electrode then forms the electrical connection between the high k dielectric and the interconnect side. Multiple embodiments are disclosed including RRAMs created in multiple substrates; different RRAM configurations; and dual, three-wire RRAMs with two interconnects. Arrays of RRAMs and methods of making are also disclosed.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: January 16, 2024
    Assignee: International Business Machines Corporation
    Inventors: Baozhen Li, Chih-Chao Yang, Barry Linder, Vijay Narayanan
  • Publication number: 20230361038
    Abstract: Provided is a method for fabricating an interconnect. The method comprises forming a topological semi-metal layer. The method further comprises patterning the topological semi-metal layer to form one or more interconnects. The method further comprises forming a dielectric layer between the one or more interconnects. The method further comprises forming a hermetic dielectric cap layer on top of the one or more interconnects and the dielectric layer.
    Type: Application
    Filed: July 18, 2023
    Publication date: November 9, 2023
    Inventors: Ching-Tzu Chen, Nicholas Anthony Lanzillo, Vijay Narayanan, Takeshi Nogami
  • Patent number: 11749602
    Abstract: Provided is a method for fabricating an interconnect. The method comprises forming a topological semi-metal layer. The method further comprises patterning the topological semi-metal layer to form one or more interconnects. The method further comprises forming a dielectric layer between the one or more interconnects. The method further comprises forming a hermetic dielectric cap layer on top of the one or more interconnects and the dielectric layer.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: September 5, 2023
    Assignee: International Business Machines Corporation
    Inventors: Ching-Tzu Chen, Nicholas Anthony Lanzillo, Vijay Narayanan, Takeshi Nogami
  • Patent number: 11700778
    Abstract: A method of controlling the forming voltage of a dielectric film in a resistive random access memory (ReRAM) device. The method includes depositing a dielectric film contains intrinsic defects on a substrate, forming a plasma-excited treatment gas containing H2 gas, and exposing the dielectric film to the plasma-excited treatment gas to create additional defects in the dielectric film without substantially changing a physical thickness of the dielectric film, where the additional defects lower the forming voltage needed for generating an electrically conducting filament across the dielectric film. The dielectric film can include a metal oxide film and the plasma-excited treatment gas may be formed using a microwave plasma source.
    Type: Grant
    Filed: April 9, 2021
    Date of Patent: July 11, 2023
    Assignee: Tokyo Electron Limited
    Inventors: Steven Consiglio, Cory Wajda, Kandabara Tapily, Takaaki Tsunomura, Takashi Ando, Paul C. Jamison, Eduard A. Cartier, Vijay Narayanan, Marinus J. P. Hopstaken
  • Publication number: 20230079392
    Abstract: Structures and methods are provided for integrating a resistance random access memory (ReRAM) in a back-end-on-the-line (BEOL) fat wire level. In one embodiment, a ReRAM device area contact structure is provided in the BEOL fat wire level that has at least a lower via portion that contacts a surface of a top electrode of a ReRAM device area ReRAM-containing stack. In other embodiments, a tall ReRAM device area bottom electrode is provided in the BEOL fat wire level and embedded in a dielectric material stack that includes a dielectric capping layer and an interlayer dielectric material layer.
    Type: Application
    Filed: September 16, 2021
    Publication date: March 16, 2023
    Inventors: Soon-Cheon Seo, DEXIN KONG, Takashi Ando, Paul Charles Jamison, HIROYUKI MIYAZOE, Youngseok Kim, Nicole Saulnier, Vijay Narayanan, Iqbal Rashid Saraf
  • Patent number: 11393725
    Abstract: A method for fabricating a semiconductor device including multiple pairs of threshold voltage (Vt) devices includes forming a stack on a base structure having a first region corresponding to a first pair of Vt devices, a second region corresponding to a second pair of Vt devices and a third region corresponding to a third pair of Vt devices. The stack includes a first dipole layer, a first sacrificial layer formed on the first dipole layer, a second sacrificial layer formed on the first sacrificial layer, and a third sacrificial layer formed on the second sacrificial layer. The method further includes forming a second dipole layer different from the first dipole layer.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: July 19, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ruqiang Bao, Vijay Narayanan, Terence B. Hook, Hemanth Jagannathan
  • Publication number: 20220157733
    Abstract: Provided is a method for fabricating an interconnect. The method comprises forming a topological semi-metal layer. The method further comprises patterning the topological semi-metal layer to form one or more interconnects. The method further comprises forming a dielectric layer between the one or more interconnects. The method further comprises forming a hermetic dielectric cap layer on top of the one or more interconnects and the dielectric layer.
    Type: Application
    Filed: November 17, 2020
    Publication date: May 19, 2022
    Inventors: Ching-Tzu Chen, Nicholas Anthony Lanzillo, Vijay Narayanan, Takeshi Nogami
  • Patent number: 11286224
    Abstract: The present invention relates to a method for preparing a compound of formula (I). The present invention also relates to compounds of formula (A) or a compound in the form of a stereoisomer. The present invention further relates to the use of a compound of formula (A) as aroma chemical.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: March 29, 2022
    Assignee: BASF SE
    Inventors: Volker Hickmann, Shrirang Hindalekar, Nitin Gupte, Sadanand Ardekar, Wolfgang Siegel, Vijay Narayanan Swaminathan, Ralf Pelzer
  • Patent number: 11258012
    Abstract: A resistive random access memory (RERAM) apparatus and method for forming the apparatus are provided. Oxygen content control in the RERAM is provided. To provide oxygen content control, a via to an electrode of the RERAM is formed utilizing an oxygen-free plasma etch step. In one embodiment, the dielectric within which the via is formed is silicon nitride (SiN). In exemplary embodiments, the plasma chemistry is a hydrofluorocarbon (CxHyFz)-based plasma chemistry or a fluorocarbon (CxFy)-based plasma chemistry. In one embodiment, the resistive layer of the RERAM is a metal oxide. In another embodiment, the oxygen concentrations in the electrode of the RERAM under the via and outside the via are the same after formation of the via.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: February 22, 2022
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Devi Koty, Qingyun Yang, Hiroyuki Miyazoe, Takashi Ando, Eduard Cartier, Vijay Narayanan, Sebastian Ulrich Englemann
  • Patent number: 11244999
    Abstract: Artificial synaptic devices with an HfO2-based ferroelectric layer that can be implemented in the CMOS back-end are provided. In one aspect, an artificial synapse element is provided. The artificial synapse element includes: a bottom electrode; a ferroelectric layer disposed on the bottom electrode, wherein the ferroelectric layer includes an HfO2-based material that crystallizes in a ferroelectric phase at a temperature of less than or equal to about 400° C.; and a top electrode disposed on the bottom electrode. An artificial synaptic device including the present artificial synapse element and methods for formation thereof are also provided.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: February 8, 2022
    Assignee: International Business Machines Corporation
    Inventors: Martin M. Frank, Takashi Ando, Xiao Sun, Jin Ping Han, Vijay Narayanan
  • Patent number: 11216595
    Abstract: A private key of a public-private key pair with a corresponding identity is written to an integrated circuit including a processor, a non-volatile memory, and a cryptographic engine coupled to the processor and the non-volatile memory. The private key is written to the non-volatile memory. The integrated circuit is implemented in complementary metal-oxide semiconductor 14 nm or smaller technology. The integrated circuit is permanently modified, subsequent to the writing, such that further writing to the non-volatile memory is disabled and such that the private key can be read only by the cryptographic engine and not off-chip. Corresponding integrated circuits and wafers are also disclosed.
    Type: Grant
    Filed: September 21, 2019
    Date of Patent: January 4, 2022
    Assignee: International Business Machines Corporation
    Inventors: Richard H. Boivie, Eduard A. Cartier, Daniel J. Friedman, Kohji Hosokawa, Charanjit Jutla, Wanki Kim, Chandrasekara Kothandaraman, Chung Lam, Frank R. Libsch, Seiji Munetoh, Ramachandran Muralidhar, Vijay Narayanan, Dirk Pfeiffer, Devendra K. Sadana, Ghavam G. Shahidi, Robert L. Wisnieff
  • Patent number: 11217450
    Abstract: Methods are provided to form pure silicon oxide layers on silicon-germanium (SiGe) layers, as well as an FET device having a pure silicon oxide interfacial layer of a metal gate structure formed on a SiGe channel layer of the FET device. For example, a method comprises growing a first silicon oxide layer on a surface of a SiGe layer using a first oxynitridation process, wherein the first silicon oxide layer comprises nitrogen. The first silicon oxide layer is removed, and a second silicon oxide layer is grown on the surface of the SiGe layer using a second oxynitridation process, which is substantially the same as the first oxynitridation process, wherein the second silicon oxide layer is substantially devoid of germanium oxide and nitrogen. For example, the first silicon oxide layer comprises a SiON layer and the second silicon oxide layer comprises a pure silicon dioxide layer.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: January 4, 2022
    Assignee: International Business Machines Corporation
    Inventors: Takashi Ando, Pouya Hashemi, Hemanth Jagannathan, ChoongHyun Lee, Vijay Narayanan
  • Patent number: 11195762
    Abstract: A semiconductor device including pairs of multiple threshold voltage (Vt) devices includes at least a first region corresponding to a first pair of Vt devices, a second region corresponding to a second pair of Vt devices including a first dipole layer, and a third region corresponding to a third pair of Vt devices including a second dipole layer different from the first dipole layer.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: December 7, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ruqiang Bao, Vijay Narayanan, Terence B. Hook, Hemanth Jagannathan
  • Patent number: 11195929
    Abstract: A gate structure for effective work function adjustments of semiconductor devices that includes a gate dielectric on a channel region of a semiconductor device; a first metal nitride in direct contact with the gate dielectric; a conformal carbide of Aluminum material layer having an aluminum content greater than 30 atomic wt. %; and a second metal nitride layer in direct contact with the conformal aluminum (Al) and carbon (C) containing material layer. The conformal carbide of aluminum (Al) layer includes aluminum carbide, or Al4C3, yielding an aluminum (Al) content up to 57 atomic % (at. %) and work function setting from 3.9 eV to 5.0 eV at thicknesses below 25 ?. Such structures can present metal gate length scaling and resistance benefit below 25 nm compared to state of the art work function electrodes.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: December 7, 2021
    Assignees: International Business Machines Corporation, ULVAC, INC.
    Inventors: Takashi Ando, Ruqiang Bao, Masanobu Hatanaka, Vijay Narayanan, Yohei Ogawa, John Rozen
  • Patent number: 11158795
    Abstract: A method is presented for facilitating oxygen vacancy generation in a resistive random access memory (RRAM) device. The method includes forming a RRAM stack having a first electrode and at least one sacrificial layer, encapsulating the RRAM stack with a dielectric layer, constructing a via resulting in removal of the at least one sacrificial layer of the RRAM stack, the via extending to a high-k dielectric layer of the RRAM stack, and forming a second electrode in the via such that the second electrode extends laterally into cavities defined by the removal of the at least one sacrificial layer.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: October 26, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Takashi Ando, Hiroyuki Miyazoe, Seyoung Kim, Vijay Narayanan
  • Patent number: 11152214
    Abstract: A method of forming a semiconductor device that includes forming a metal oxide material on a III-V semiconductor channel region or a germanium containing channel region; and treating the metal oxide material with an oxidation process. The method may further include depositing of a hafnium containing oxide on the metal oxide material after the oxidation process, and forming a gate conductor atop the hafnium containing oxide. The source and drain regions are on present on opposing sides of the gate structure including the metal oxide material, the hafnium containing oxide and the gate conductor.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: October 19, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Takashi Ando, John Bruley, Eduard A. Cartier, Martin M. Frank, Vijay Narayanan, John Rozen
  • Patent number: 11121209
    Abstract: A method for forming a metal-insulator-metal (MIM) capacitor on a semiconductor substrate is presented. The method includes forming a first electrode defining columnar grains, forming a dielectric layer over the first electrode, and forming a second electrode over the dielectric layer. The first and second electrodes can be titanium nitride (TiN) electrodes. The dielectric layer can include one of hafnium oxide and zirconium oxide deposited by atomic layer deposition (ALD). The ALD results in deposition of high-k films in grain boundaries of the first electrode.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: September 14, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Takashi Ando, Eduard A. Cartier, Hemanth Jagannathan, Paul C. Jamison, Vijay Narayanan
  • Publication number: 20210280638
    Abstract: A Resistive Random-Access Memory (RRAM) has an internal electrode; a high k dielectric layer surrounding and in contact with the internal electrode; a lower substrate; and a trench having three or more trench sides disposed within the lower substrate; and one or more interconnects each with an interconnect side. The interconnect side forms part of one of the trench sides. The internal electrode and the high k dielectric layer are disposed within the trench with the interconnect side in contact with the high k dielectric layer. In some embodiments, an external electrode is between and electrically connected to the high k dielectric layer and the internal electrode. The external electrode then forms the electrical connection between the high k dielectric and the interconnect side. Multiple embodiments are disclosed including RRAMs created in multiple substrates; different RRAM configurations; and dual, three-wire RRAMs with two interconnects. Arrays of RRAMs and methods of making are also disclosed.
    Type: Application
    Filed: March 9, 2020
    Publication date: September 9, 2021
    Inventors: Baozhen Li, Chih-Chao Yang, Barry Linder, Vijay Narayanan
  • Publication number: 20210234096
    Abstract: A method of controlling the forming voltage of a dielectric film in a resistive random access memory (ReRAM) device. The method includes depositing a dielectric film contains intrinsic defects on a substrate, forming a plasma-excited treatment gas containing H2 gas, and exposing the dielectric film to the plasma-excited treatment gas to create additional defects in the dielectric film without substantially changing a physical thickness of the dielectric film, where the additional defects lower the forming voltage needed for generating an electrically conducting filament across the dielectric film. The dielectric film can include a metal oxide film and the plasma-excited treatment gas may be formed using a microwave plasma source.
    Type: Application
    Filed: April 9, 2021
    Publication date: July 29, 2021
    Inventors: Steven Consiglio, Cory Wajda, Kandabara Tapily, Takaaki Tsunomura, Takashi Ando, Paul C. Jamison, Eduard A. Cartier, Vijay Narayanan, Marinus J.P. Hopstaken