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).

  • Publication number: 20180308845
    Abstract: Semiconductor devices and methods of making the same include forming a first channel region on a first semiconductor region. A second channel region is formed on a second semiconductor region, the second semiconductor region being formed from a semiconductor material that is different from a semiconductor material of the first semiconductor region. A gate dielectric layer is formed over one or more of the first and second channel regions. A nitrogen-containing layer is formed on the gate dielectric layer. A gate is formed on the gate dielectric.
    Type: Application
    Filed: June 19, 2018
    Publication date: October 25, 2018
    Inventors: Takashi Ando, Martin M. Frank, Renee T. Mo, Vijay Narayanan, John Rozen
  • Patent number: 10106477
    Abstract: The present invention relates to a process for preparing, 4-bis(ethoxymethyl)cyclohexane, which comprises reacting 1,4-bis(hydroxymethyl)cyclohexane with ethyl chloride in the presence of an inorganic base, a solvent and a phase transfer catalyst to yield a reaction mixture containing 1,4-bis(ethoxymethyl)cyclohexane, where the inorganic base is selected from alkali metal hydroxides and earth alkaline metal hydroxides and where the solvent is selected from water or a mixture of water with at least one organic solvent.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: October 23, 2018
    Assignee: BASF SE
    Inventors: Thomas Fenlon, Stefan Rüdenauer, Ralf Pelzer, Shrirang Hindalekar, Vijay Narayanan Swaminathan, Nitin Gupte, Sadanand Ardekar
  • Publication number: 20180277540
    Abstract: A method of fabricating a semiconductor structure having multiple defined threshold voltages includes: forming multiple field-effect transistor (FET) devices in the semiconductor structure, each of the FET devices including a channel and a gate stack formed of one of at least two different work function metals, the gate stack being formed proximate the channel; and varying a bang-gap of the channel in each of at least a subset of the FET devices by controlling a percentage of one or more compositions of a material forming the channel; wherein a threshold voltage of each of the FET devices is configured as a function of a type of work function metal forming the gate stack and the percentage of one or more compositions of the material forming the channel.
    Type: Application
    Filed: March 21, 2017
    Publication date: September 27, 2018
    Inventors: Hemanth Jagannathan, Vijay Narayanan
  • Publication number: 20180277621
    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: Application
    Filed: December 5, 2017
    Publication date: September 27, 2018
    Inventors: Takashi Ando, Eduard A. Cartier, Hemanth Jagannathan, Paul C. Jamison, Vijay Narayanan
  • Publication number: 20180277623
    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: Application
    Filed: March 27, 2017
    Publication date: September 27, 2018
    Inventors: Takashi Ando, Eduard A. Cartier, Hemanth Jagannathan, Paul C. Jamison, Vijay Narayanan
  • Patent number: 10084055
    Abstract: A method is presented for forming a nanosheet structure having a uniform threshold voltage (Vt). The method includes forming a conductive barrier surrounding a nanosheet, forming a first work function conducting layer over the conductive barrier layer, and forming a conducting layer adjacent the first work function conducting layer, the conducting layer defining a first region and a second region. The method further includes forming a second work function conducting layer over the second region of the conducting layer to compensate for threshold voltage offset between the first and second regions of the conducting layer.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: September 25, 2018
    Assignee: International Business Machines Corporation
    Inventors: Ruqiang Bao, Hemanth Jagannathan, Paul C. Jamison, ChoongHyun Lee, Vijay Narayanan, Koji Watanabe
  • Patent number: 10079182
    Abstract: A method for fabricating a gate stack of a semiconductor device comprises forming a first dielectric layer over a channel region of the device, depositing a first nitride layer on exposed portions of the first dielectric layer, depositing a scavenging layer on the first nitride layer, forming a capping layer over the scavenging layer, removing portions of the capping layer, the scavenging layer, and the first nitride layer to expose a portion of the first dielectric layer in an n-type field effect transistor (nFET) region of the gate stack, forming a barrier layer over the first dielectric layer and the capping layer, forming a first gate metal layer over the barrier layer, depositing a second nitride layer on the first gate metal layer, and depositing a gate electrode material on the second nitride layer.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: September 18, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ruqiang Bao, Siddarth A. Krishnan, Unoh Kwon, Vijay Narayanan
  • Publication number: 20180244613
    Abstract: The present invention relates to a process for preparing 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one, which comprises a) providing 6,10-dimethylundeca-1,5,9-trien-4-ol, b) oxidizing 6,10-dimethylundeca-1,5,9-trien-4-ol provided in step a) with an oxidizing agent in the presence of at least one organic nitroxyl radical, at least one nitrate compound and an inorganic solid to yield 6,10-dimethylundeca-1,5,9-trien-4-one, c) reacting the 6,10-dimethylundeca-1,5,9-trien-4-one obtained in step b) with an acid to yield 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one.
    Type: Application
    Filed: August 17, 2016
    Publication date: August 30, 2018
    Inventors: Stefan RÜDENAUER, Thomas FENLON, Shriang HINDALEKAR, Nisha PANSARE, Abhijeet Deb ROY, Vijay Narayanan SWAMINATHAN
  • Patent number: 10062693
    Abstract: Semiconductor devices and methods of making the same include forming a first channel region on a first semiconductor region. A second channel region is formed on a second semiconductor region, the second semiconductor region being formed from a semiconductor material that is different from a semiconductor material of the first semiconductor region. A nitrogen-containing layer is formed on one or more of the first and second channel regions. A gate dielectric layer is formed over the nitrogen-containing layer. A gate is formed on the gate dielectric.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: August 28, 2018
    Assignee: International Business Machines Corporation
    Inventors: Takashi Ando, Martin M. Frank, Renee T. Mo, Vijay Narayanan, John Rozen
  • Patent number: 10062694
    Abstract: Semiconductor devices and methods of making the same include forming a first channel region on a first semiconductor region. A second channel region is formed on a second semiconductor region, the second semiconductor region being formed from a semiconductor material that is different from a semiconductor material of the first semiconductor region. A gate dielectric layer is formed over one or more of the first and second channel regions. A nitrogen-containing layer is formed on the gate dielectric layer. A gate is formed on the gate dielectric.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: August 28, 2018
    Assignee: International Business Machines Corporation
    Inventors: Takashi Ando, Martin M. Frank, Renee T. Mo, Vijay Narayanan, John Rozen
  • Publication number: 20180240799
    Abstract: An electrical device that includes at least one n-type field effect transistor including a channel region in a type III-V semiconductor device, and at least one p-type field effect transistor including a channel region in a germanium containing semiconductor material. Each of the n-type and p-type semiconductor devices may include gate structures composed of material layers including work function adjusting materials selections, such as metal and doped dielectric layers. The field effect transistors may be composed of fin type field effect transistors. The field effect transistors may be formed using gate first processing or gate last processing.
    Type: Application
    Filed: April 23, 2018
    Publication date: August 23, 2018
    Inventors: Takashi Ando, Martin M. Frank, Pranita Kerber, Vijay Narayanan
  • Publication number: 20180237369
    Abstract: The present invention relates to a process for preparing,4-bis(ethoxymethyl)cyclohexane, which comprises reacting1,4-bis(hydroxymethyl)cyclohexane with ethyl chloride in the presence of an inorganic base, a solvent and a phase transfer catalyst to yield a reaction mixture containing 1,4-bis(ethoxymethyl)cyclohexane, where the inorganic base is selected from alkali metal hydroxides and earth alkaline metal hydroxides and where the solvent is selected from water or a mixture of water with at least one organic solvent.
    Type: Application
    Filed: August 17, 2016
    Publication date: August 23, 2018
    Inventors: Thomas FENLON, Stefan RÜDENAUER, Ralf PELZER, Shrirang HINDALEKAR, Vijay Narayanan SWAMINATHAN, Nitin GUPTE, Sadanand ARDEKAR
  • Publication number: 20180233369
    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: Application
    Filed: April 11, 2018
    Publication date: August 16, 2018
    Inventors: Takashi Ando, Pouya Hashemi, Hemanth Jagannathan, Choonghyun Lee, Vijay Narayanan
  • Publication number: 20180233370
    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: Application
    Filed: April 11, 2018
    Publication date: August 16, 2018
    Inventors: Takashi Ando, Pouya Hashemi, Hemanth Jagannathan, Choonghyun Lee, Vijay Narayanan
  • Publication number: 20180226484
    Abstract: A method is presented for forming a nanosheet structure having a uniform threshold voltage (Vt). The method includes forming a conductive barrier surrounding a nanosheet, forming a first work function conducting layer over the conductive barrier layer, and forming a conducting layer adjacent the first work function conducting layer, the conducting layer defining a first region and a second region. The method further includes forming a second work function conducting layer over the second region of the conducting layer to compensate for threshold voltage offset between the first and second regions of the conducting layer.
    Type: Application
    Filed: February 3, 2017
    Publication date: August 9, 2018
    Inventors: Ruqiang Bao, Hemanth Jagannathan, Paul C. Jamison, ChoongHyun Lee, Vijay Narayanan, Koji Watanabe
  • Publication number: 20180219155
    Abstract: A resistive switching memory stack is provided. The resistive switching memory stack includes a bottom electrode, formed from one or more conductors. The resistive switching memory stack further includes an oxide layer, disposed over the bottom electrode, formed from an Atomic Layer Deposition (ALD) of one or more oxides. The resistive switching memory stack also includes a top electrode, disposed over the oxide layer, formed from the ALD of a plurality of metals into a metal layer stack. An oxygen vacancy concentration of the resistive switching memory stack is controlled by (i) a thickness of the plurality of metals forming the top electrode and (ii) a percentage of a particular one of the plurality of metals in the metal layer stack of the top electrode.
    Type: Application
    Filed: January 11, 2018
    Publication date: August 2, 2018
    Inventors: Takashi Ando, Vijay Narayanan, John Rozen
  • Publication number: 20180204839
    Abstract: A semiconductor device is provided and has an n-channel field effect transistor (nFET) bottom junction and a p-channel field effect transistor (pFET) bottom junction. The semiconductor device includes first and second fin formations operably disposed in the nFET and pFET bottom junctions, respectively. The semiconductor device can also include an nFET metal gate layer deposited for oxygen absorption onto a high-k dielectric layer provided about the first fin formation in the nFET bottom junction and onto a pFET metal gate layer provided about the second fin formation in the pFET bottom junction. Alternatively, the semiconductor device can include an oxygen scavenging layer deposited onto the pFET metal gate layer about the second fin formation in the pFET bottom junction and, with the pFET metal gate layer deposited onto the nFET metal gate layer about the first fin formation in the nFET bottom junction, onto the pFET metal gate layer in the nFET bottom junction.
    Type: Application
    Filed: January 16, 2017
    Publication date: July 19, 2018
    Inventors: RUQIANG BAO, HEMANTH JAGANNATHAN, PAUL JAMISON, CHOONGHYUN LEE, VIJAY NARAYANAN
  • Patent number: 10026041
    Abstract: An interoperable platform that provides a way to automatically compose and execute even complex workflows without writing code is described. A set of pre-built functional building blocks can be provided. The building blocks perform data transformation and machine learning functions. The functional blocks have few well known plug types. The building blocks can be composed to build complex compositions. Interoperability between data formats, metadata schema and interfaces to machine learning (ML) functions and trained machine learning models can be provided with no loss of information. A cloud runtime environment can be provided in which the composed workflows can be hosted as REST API to run in production.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: July 17, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Vijay Narayanan, Sudarshan Raghunathan, Akshaya Annavajhala
  • Publication number: 20180197972
    Abstract: A method of fabricating a replacement gate stack for a semiconductor device includes the following steps after removal of a dummy gate: growing a high-k dielectric layer over the area vacated by the dummy gate; depositing a thin metal layer over the high-k dielectric layer; depositing a sacrificial layer over the thin metal layer; performing a first rapid thermal anneal; removing the sacrificial layer; and depositing a metal layer of low resistivity metal for gap fill.
    Type: Application
    Filed: March 5, 2018
    Publication date: July 12, 2018
    Inventors: Takashi Ando, Eduard A. Cartier, Kisik Choi, Vijay Narayanan
  • Publication number: 20180197917
    Abstract: Cross bar array devices and methods of forming the same include first electrodes arranged adjacent to each other and extending in a first direction. Second electrodes are arranged transversely to the first electrodes. An electrolyte layer is disposed between the first electrodes and the second electrodes, the electrolyte layer comprising a nitridated dielectric material.
    Type: Application
    Filed: January 12, 2017
    Publication date: July 12, 2018
    Inventors: Takashi Ando, Marwan H. Khater, Seyoung Kim, Hiroyuki Miyazoe, Vijay Narayanan