Patents by Inventor Srinivas Nemani

Srinivas Nemani 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: 11410860
    Abstract: Methods and process chambers for etching of low-k and other dielectric films are described. For example, a method includes modifying portions of the low-k dielectric layer with a plasma process. The modified portions of the low-k dielectric layer are etched selectively over a mask layer and unmodified portions of the low-k dielectric layer. Etch chambers having multiple chamber regions for alternately generating distinct plasmas are described. In embodiments, a first charge coupled plasma source is provided to generate an ion flux to a workpiece in one operational mode, while a secondary plasma source is provided to provide reactive species flux without significant ion flux to the workpiece in another operational mode. A controller operates to cycle the operational modes repeatedly over time to remove a desired cumulative amount of the dielectric material.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: August 9, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Dmitry Lubomirsky, Srinivas Nemani, Ellie Yieh, Sergey G. Belostotskiy
  • Patent number: 11110383
    Abstract: Embodiments of the present disclosure relate to gas abatement apparatus and effluent management. The apparatus described herein include a high pressure process chamber and a containment chamber surrounding the process chamber. A high pressure fluid delivery module is in fluid communication with the high pressure process chamber and is configured to deliver a high pressure fluid to the process chamber. An effluent management module includes a muffler assembly to effluent pressure reduction and a plurality of scrubbers provide for treatment of effluent.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: September 7, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Adib Khan, Qiwei Liang, Sultan Malik, Srinivas Nemani, Rafika Smati, Joseph Ng, John O'Hehir
  • Publication number: 20210134618
    Abstract: Methods and process chambers for etching of low-k and other dielectric films are described. For example, a method includes modifying portions of the low-k dielectric layer with a plasma process. The modified portions of the low-k dielectric layer are etched selectively over a mask layer and unmodified portions of the low-k dielectric layer. Etch chambers having multiple chamber regions for alternately generating distinct plasmas are described. In embodiments, a first charge coupled plasma source is provided to generate an ion flux to a workpiece in one operational mode, while a secondary plasma source is provided to provide reactive species flux without significant ion flux to the workpiece in another operational mode. A controller operates to cycle the operational modes repeatedly over time to remove a desired cumulative amount of the dielectric material.
    Type: Application
    Filed: January 8, 2021
    Publication date: May 6, 2021
    Inventors: Dmitry Lubomirsky, Srinivas Nemani, Ellie Yieh, Sergey G. Belostotskiy
  • Patent number: 10964527
    Abstract: Methods for removing residuals after a selective deposition process are provided. In one embodiment, the method includes performing a selective deposition process to form a metal containing dielectric material at a first location of a substrate and performing a residual removal process to remove residuals from a second location of the substrate.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: March 30, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Jong Mun Kim, Biao Liu, Cheng Pan, Erica Chen, Chentsau Ying, Srinivas Nemani, Ellie Yieh
  • Patent number: 10943779
    Abstract: Embodiments include methods and systems of 3D structure fill. In one embodiment, a method of filling a trench in a wafer includes performing directional plasma treatment with an ion beam at an angle with respect to a sidewall of the trench to form a treated portion of the sidewall and an untreated bottom of the trench. A material is deposited in the trench. The deposition rate of the material on the treated portion of the sidewall is different than a second deposition rate on the untreated bottom of the trench. In one embodiment, a method includes depositing a material on the wafer, filling a bottom of the trench and forming a layer on a sidewall of the trench and a top surface adjacent to the trench. The method includes etching the layer with an ion beam at an angle with respect to the sidewall.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: March 9, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Ellie Yieh, Ludovic Godet, Srinivas Nemani, Er-Xuan Ping, Gary Dickerson
  • Patent number: 10923367
    Abstract: Methods and process chambers for etching of low-k and other dielectric films are described. For example, a method includes modifying portions of the low-k dielectric layer with a plasma process. The modified portions of the low-k dielectric layer are etched selectively over a mask layer and unmodified portions of the low-k dielectric layer. Etch chambers having multiple chamber regions for alternately generating distinct plasmas are described. In embodiments, a first charge coupled plasma source is provided to generate an ion flux to a workpiece in one operational mode, while a secondary plasma source is provided to provide reactive species flux without significant ion flux to the workpiece in another operational mode. A controller operates to cycle the operational modes repeatedly over time to remove a desired cumulative amount of the dielectric material.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: February 16, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Dmitry Lubomirsky, Srinivas Nemani, Ellie Yieh, Sergey G. Belostotskiy
  • Publication number: 20200368666
    Abstract: Embodiments of the present disclosure relate to gas abatement apparatus and effluent management. The apparatus described herein include a high pressure process chamber and a containment chamber surrounding the process chamber. A high pressure fluid delivery module is in fluid communication with the high pressure process chamber and is configured to deliver a high pressure fluid to the process chamber. An effluent management module includes a muffler assembly to effluent pressure reduction and a plurality of scrubbers provide for treatment of effluent.
    Type: Application
    Filed: June 9, 2020
    Publication date: November 26, 2020
    Inventors: Adib KHAN, Qiwei LIANG, Sultan MALIK, Srinivas NEMANI, Rafika Smati, Joseph Ng, John O'Hehir
  • Patent number: 10790183
    Abstract: Embodiments described herein generally relate to methods and device structures for horizontal gate all around (hGAA) isolation and fin field effect transistor (FinFET) isolation. A superlattice structure comprising different materials arranged in an alternatingly stacked formation may be formed on a substrate. In one embodiment, at least one of the layers of the superlattice structure is oxidized by a high pressure oxidation process to form a buried oxide layer adjacent the substrate.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: September 29, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Shiyu Sun, Keith Tatseun Wong, Kurtis Leschkies, Namsung Kim, Srinivas Nemani
  • Patent number: 10675581
    Abstract: Embodiments of the present disclosure relate to gas abatement apparatus and effluent management. The apparatus described herein include a high pressure process chamber and a containment chamber surrounding the process chamber. A high pressure fluid delivery module is in fluid communication with the high pressure process chamber and is configured to deliver a high pressure fluid to the process chamber. An effluent management module includes a muffler assembly to effluent pressure reduction and a plurality of scrubbers provide for treatment of effluent.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: June 9, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Adib Khan, Qiwei Liang, Sultan Malik, Srinivas Nemani, Rafika Smati, Joseph Ng, John O'Hehir
  • Publication number: 20200038797
    Abstract: Embodiments of the present disclosure relate to gas abatement apparatus and effluent management. The apparatus described herein include a high pressure process chamber and a containment chamber surrounding the process chamber. A high pressure fluid delivery module is in fluid communication with the high pressure process chamber and is configured to deliver a high pressure fluid to the process chamber. An effluent management module includes a muffler assembly to effluent pressure reduction and a plurality of scrubbers provide for treatment of effluent.
    Type: Application
    Filed: August 6, 2018
    Publication date: February 6, 2020
    Inventors: Adib KHAN, Qiwei LIANG, Sultan MALIK, Srinivas NEMANI, Rafika Smati, Joseph Ng, John O'Hehir
  • Patent number: 10549324
    Abstract: Embodiments of methods and apparatus for removing particles from a surface of a substrate, such as from the backside of the substrate, are provided herein. In some embodiments, an apparatus for removing particles from a surface of a substrate includes: a substrate handler to expose the surface of the substrate; a particle separator to separate particles from the exposed surface of the substrate; a particle transporter to transport the separated particles; and a particle collector to collect the transported particles.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: February 4, 2020
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Sriskantharajah Thirunavukarasu, Jen Sern Lew, Arvind Sundarrajan, Srinivas Nemani
  • Publication number: 20190393024
    Abstract: Methods for removing residuals after a selective deposition process are provided. In one embodiment, the method includes performing a selective deposition process to form a metal containing dielectric material at a first location of a substrate and performing a residual removal process to remove residuals from a second location of the substrate.
    Type: Application
    Filed: May 2, 2019
    Publication date: December 26, 2019
    Inventors: Jong Mun KIM, Biao LIU, Cheng PAN, Erica CHEN, Chentsau YING, Srinivas NEMANI, Ellie YIEH
  • Publication number: 20190371650
    Abstract: Embodiments described herein generally relate to methods and device structures for horizontal gate all around (hGAA) isolation and fin field effect transistor (FinFET) isolation. A superlattice structure comprising different materials arranged in an alternatingly stacked formation may be formed on a substrate. In one embodiment, at least one of the layers of the superlattice structure is oxidized by a high pressure oxidation process to form a buried oxide layer adjacent the substrate.
    Type: Application
    Filed: May 9, 2019
    Publication date: December 5, 2019
    Inventors: Shiyu SUN, Keith Tatseun WONG, Kurtis LESCHKIES, Namsung KIM, Srinivas NEMANI
  • Patent number: 10475655
    Abstract: Embodiments of the disclosure relate to selective metal silicide deposition methods. In one embodiment, a substrate having a silicon containing surface is heated and the silicon containing surface is hydrogen terminated. The substrate is exposed to sequential cycles of a MoF6 precursor and a Si2H6 precursor which is followed by an additional Si2H6 overdose exposure to selectively deposit a MoSix material comprising MoSi2 on the silicon containing surface of the substrate.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: November 12, 2019
    Assignees: Applied Materials, Inc., The Regents of the University of California
    Inventors: Raymond Hung, Namsung Kim, Srinivas Nemani, Ellie Yieh, Jong Choi, Christopher Ahles, Andrew Kummel
  • Publication number: 20180358244
    Abstract: Methods and process chambers for etching of low-k and other dielectric films are described. For example, a method includes modifying portions of the low-k dielectric layer with a plasma process. The modified portions of the low-k dielectric layer are etched selectively over a mask layer and unmodified portions of the low-k dielectric layer. Etch chambers having multiple chamber regions for alternately generating distinct plasmas are described. In embodiments, a first charge coupled plasma source is provided to generate an ion flux to a workpiece in one operational mode, while a secondary plasma source is provided to provide reactive species flux without significant ion flux to the workpiece in another operational mode. A controller operates to cycle the operational modes repeatedly over time to remove a desired cumulative amount of the dielectric material.
    Type: Application
    Filed: August 21, 2018
    Publication date: December 13, 2018
    Inventors: Dmitry LUBOMIRSKY, Srinivas NEMANI, Ellie YIEH, Sergey G. BELOSTOTSKIY
  • Publication number: 20180342395
    Abstract: Embodiments of the disclosure relate to selective metal silicide deposition methods. In one embodiment, a substrate having a silicon containing surface is heated and the silicon containing surface is hydrogen terminated. The substrate is exposed to sequential cycles of a MoF6 precursor and a Si2H6 precursor which is followed by an additional Si2H6 overdose exposure to selectively deposit a MoSix material comprising MoSi2 on the silicon containing surface of the substrate.
    Type: Application
    Filed: May 24, 2018
    Publication date: November 29, 2018
    Inventors: Raymond HUNG, Namsung KIM, Srinivas NEMANI, Ellie YIEH, Jong CHOI, Christopher AHLES, Andrew KUMMEL
  • Patent number: 10096466
    Abstract: Methods of processing a substrate are provided herein. In some embodiments, a method of processing a substrate disposed in a processing chamber includes: (a) depositing a layer of material on a substrate by exposing the substrate to a first reactive species generated from a remote plasma source and to a first precursor, wherein the first reactive species reacts with the first precursor; and (b) treating all, or substantially all, of the deposited layer of material by exposing the substrate to a plasma generated within the processing chamber from a second plasma source; wherein at least one of the remote plasma source or the second plasma source is pulsed to control periods of depositing and periods of treating.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: October 9, 2018
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Jun Xue, Ludovic Godet, Srinivas Nemani, Michael W. Stowell, Qiwei Liang, Douglas A. Buchberger
  • Patent number: 10096496
    Abstract: Methods and process chambers for etching of low-k and other dielectric films are described. For example, a method includes modifying portions of the low-k dielectric layer with a plasma process. The modified portions of the low-k dielectric layer are etched selectively over a mask layer and unmodified portions of the low-k dielectric layer. Etch chambers having multiple chamber regions for alternately generating distinct plasmas are described. In embodiments, a first charge coupled plasma source is provided to generate an ion flux to a workpiece in one operational mode, while a secondary plasma source is provided to provide reactive species flux without significant ion flux to the workpiece in another operational mode. A controller operates to cycle the operational modes repeatedly over time to remove a desired cumulative amount of the dielectric material.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: October 9, 2018
    Assignee: Applied Materials, Inc.
    Inventors: Dmitry Lubomirsky, Srinivas Nemani, Ellie Yieh, Sergey G. Belostotskiy
  • Publication number: 20180257116
    Abstract: Embodiments of methods and apparatus for removing particles from a surface of a substrate, such as from the backside of the substrate, are provided herein. In some embodiments, an apparatus for removing particles from a surface of a substrate includes: a substrate handler to expose the surface of the substrate; a particle separator to separate particles from the exposed surface of the substrate; a particle transporter to transport the separated particles; and a particle collector to collect the transported particles.
    Type: Application
    Filed: May 8, 2018
    Publication date: September 13, 2018
    Inventors: SRISKANTHARAJAH THIRUNAVUKARASU, JEN SERN LEW, ARVIND SUNDARRAJAN, SRINIVAS NEMANI
  • Patent number: 10062602
    Abstract: The invention relates to a method of etching a layer of porous dielectric material, characterized in that the etching is performed in a plasma formed from at least one silicon-based gas mixed with oxygen (O2) and/or nitrogen (N2) so as to grow a passivation layer all along said etching, at least on flanks of the layer of porous dielectric material and wherein the silicon-based gas is taken from all the compounds of the type SixHy for which the ratio x/y is equal or greater than 0.3 or is taken from all the compounds of the following types: SixFy and SixCly, where x is the proportion of silicon (Si) in the gas and y is the proportion of fluorine (F) or chlorine (Cl) or hydrogen (H) in the gas.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: August 28, 2018
    Assignees: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, CNRS—Centre National de la Recherche Scientifique, APPLIED MATERIALS, Inc
    Inventors: Nicolas Posseme, Sebastien Barnola, Olivier Joubert, Srinivas Nemani, Laurent Vallier