Patents by Inventor Srinivas D. Nemani

Srinivas D. 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: 11289331
    Abstract: A method of forming graphene layers is disclosed. A method of improving graphene deposition is also disclosed. Some methods are advantageously performed at lower temperatures. Some methods advantageously provide graphene layers with lower resistance. Some methods advantageously provide graphene layers in a relatively short period of time.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: March 29, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Jie Zhou, Erica Chen, Qiwei Liang, Chentsau Chris Ying, Srinivas D. Nemani, Ellie Y. Yieh
  • Publication number: 20220091513
    Abstract: A film structure for an electric field assisted bake process and methods of forming and implementing such a film structure are described herein. An example is a method for semiconductor processing. A photoresist is deposited on an underlayer disposed on a substrate. The underlayer includes carbon. The photoresist is exposed to a pattern of electromagnetic radiation. After exposing the photoresist, an electric field assisted bake is performed on the photoresist.
    Type: Application
    Filed: September 18, 2020
    Publication date: March 24, 2022
    Inventors: Mangesh Ashok BANGAR, Huixiong DAI, Pinkesh Rohit SHAH, Srinivas D. NEMANI, Christopher S. NGAI, Ellie Y. YIEH
  • Patent number: 11244808
    Abstract: A plasma reactor includes a chamber body having an interior space that provides a plasma chamber, a gas distribution port to deliver a processing gas to the plasma chamber, a workpiece support to hold a workpiece, an antenna array comprising a plurality of monopole antennas extending partially into the plasma chamber, and an AC power source to supply a first AC power to the plurality of monopole antennas.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: February 8, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Qiwei Liang, Srinivas D. Nemani
  • Patent number: 11222769
    Abstract: A plasma reactor includes a chamber body having an interior space that provides a plasma chamber, a gas distribution port to deliver a processing gas to the plasma chamber, a workpiece support to hold a workpiece, an antenna array comprising a plurality of monopole antennas extending partially into the plasma chamber, and an AC power source to supply a first AC power to the plurality of monopole antennas. The plurality of monopole antennas can extend through a first gas distribution plate. A grid filter can be positioned between the workpiece support and the plurality of monopole antennas.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: January 11, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Qiwei Liang, Srinivas D. Nemani
  • Publication number: 20220004104
    Abstract: Embodiments described herein relate to methods and apparatus for performing immersion field guided post exposure bake processes. Embodiments of apparatus described herein include a chamber body defining a processing volume. A pedestal may be disposed within the processing volume and a first electrode may be coupled to the pedestal. A moveable stem may extend through the chamber body opposite the pedestal and a second electrode may be coupled to the moveable stem. In certain embodiments, a fluid containment ring may be coupled to the pedestal and a dielectric containment ring may be coupled to the second electrode.
    Type: Application
    Filed: September 7, 2021
    Publication date: January 6, 2022
    Inventors: Viachslav BABAYAN, Douglas A. BUCHBERGER, JR., Qiwei LIANG, Ludovic GODET, Srinivas D. NEMANI, Daniel J. WOODRUFF, Randy HARRIS, Robert B. MOORE
  • Patent number: 11205589
    Abstract: Methods and apparatus for lowering resistivity of a metal line, including: depositing a first metal layer atop a second metal layer to under conditions sufficient to increase a grain size of a metal of the first metal layer; etching the first metal layer to form a metal line with a first line edge roughness and to expose a portion of the second metal layer; removing impurities from the metal line by a hydrogen treatment process; and annealing the metal line at a pressure between 760 Torr and 76,000 Torr to reduce the first line edge roughness.
    Type: Grant
    Filed: October 6, 2019
    Date of Patent: December 21, 2021
    Assignee: APPLIED MATERIALS, INC.
    Inventors: He Ren, Hao Jiang, Mehul Naik, Srinivas D Nemani, Ellie Yieh
  • Publication number: 20210384040
    Abstract: Embodiments of the present invention provide an apparatus and methods for depositing a dielectric material using RF bias pulses along with remote plasma source deposition for manufacturing semiconductor devices, particularly for filling openings with high aspect ratios in semiconductor applications. In one embodiment, a method of depositing a dielectric material includes providing a gas mixture into a processing chamber having a substrate disposed therein, forming a remote plasma in a remote plasma source and delivering the remote plasma to an interior processing region defined in the processing chamber, applying a RF bias power to the processing chamber in pulsed mode, and forming a dielectric material in an opening defined in a material layer disposed on the substrate in the presence of the gas mixture and the remote plasma.
    Type: Application
    Filed: August 23, 2021
    Publication date: December 9, 2021
    Inventors: Bhargav S. CITLA, Jethro TANNOS, Jingyi LI, Douglas A. BUCHBERGER, JR., Zhong Qiang HUA, Srinivas D. NEMANI, Ellie Y. YIEH
  • Publication number: 20210375600
    Abstract: The present disclosure generally relates to a substrate processing chamber, a substrate processing apparatus, and a substrate processing method for self-assembled monolayer (SAM) deposition of low vapor pressure organic molecules (OM) followed by further substrate processing, such as atomic layer deposition.
    Type: Application
    Filed: May 28, 2021
    Publication date: December 2, 2021
    Inventors: Qiwei Liang, Srinivas D. Nemani, Keith Tatseun Wong, Antony K. Jan
  • Publication number: 20210317573
    Abstract: Embodiments described and discussed herein provide methods for selectively depositing a metal oxides on a substrate. In one or more embodiments, methods for forming a metal oxide material includes positioning a substrate within a processing chamber, where the substrate has passivated and non-passivated surfaces, exposing the substrate to a first metal alkoxide precursor to selectively deposit a first metal oxide layer on or over the non-passivated surface, and exposing the substrate to a second metal alkoxide precursor to selectively deposit a second metal oxide layer on the first metal oxide layer. The method also includes sequentially repeating exposing the substrate to the first and second metal alkoxide precursors to produce a laminate film containing alternating layers of the first and second metal oxide layers. Each of the first and second metal alkoxide precursors contain different types of metals which are selected from titanium, zirconium, hafnium, aluminum, or lanthanum.
    Type: Application
    Filed: June 16, 2020
    Publication date: October 14, 2021
    Inventors: Keith Tatseun WONG, Srinivas D. NEMANI, Andrew C. KUMMEL, James HUANG, Yunil CHO
  • Patent number: 11145808
    Abstract: Embodiments of the disclosure provide methods and apparatus for fabricating magnetic tunnel junction (MTJ) structures on a substrate for MRAM applications. In one embodiment, a method for forming a magnetic tunnel junction (MTJ) device structure includes performing a patterning process by an ion beam etching process in a processing chamber to pattern a film stack disposed on a substrate, wherein the film stack comprises a reference layer, a tunneling barrier layer and a free layer disposed on the tunneling barrier, and determining an end point for the patterning process.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: October 12, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Jong Mun Kim, Minrui Yu, Chando Park, Mang-Mang Ling, Jaesoo Ahn, Chentsau Chris Ying, Srinivas D. Nemani, Mahendra Pakala, Ellie Y. Yieh
  • Publication number: 20210305501
    Abstract: One or more embodiments described herein generally relate to patterning semiconductor film stacks. Unlike in conventional embodiments, the film stacks herein are patterned without the need of etching the magnetic tunnel junction (MTJ) stack. Instead, the film stack is etched before the MTJ stack is deposited such that the spin on carbon layer and the anti-reflective coating layer are completely removed and a trench is formed within the dielectric capping layer and the oxide layer. Thereafter, MTJ stacks are deposited on the buffer layer and on the dielectric capping layer. An oxide capping layer is deposited such that it covers the MTJ stacks. An oxide fill layer is deposited over the oxide capping layer and the film stack is polished by chemical mechanical polishing (CMP). The embodiments described herein advantageously result in no damage to the MTJ stacks since etching is not required.
    Type: Application
    Filed: May 24, 2021
    Publication date: September 30, 2021
    Inventors: John O. DUKOVIC, Srinivas D. NEMANI, Ellie Y. YIEH, Praburam GOPALRAJA, Steven Hiloong WELCH, Bhargav S. CITLA
  • Publication number: 20210294216
    Abstract: A method for enhancing the depth of focus process window during a lithography process includes applying a photoresist layer comprising a photoacid generator on a material layer disposed on a substrate, exposing a first portion of the photoresist layer unprotected by a photomask to light radiation in a lithographic exposure process, providing a thermal energy to the photoresist layer in a post-exposure baking process, applying an electric field or a magnetic field while performing the post-exposure baking process, and dynamically changing a frequency of the electric field as generated while providing the thermal energy to the photoresist layer.
    Type: Application
    Filed: March 20, 2020
    Publication date: September 23, 2021
    Inventors: Huixiong Dai, Mangesh Ashok Bangar, Srinivas D. Nemani, Christopher S. Ngai, Ellie Y. Yieh
  • Publication number: 20210294215
    Abstract: A method for enhancing a photoresist profile control includes applying a photoresist layer comprising a photoacid generator on an underlayer disposed on a material layer, exposing a first portion of the photoresist layer unprotected by a photomask to light radiation in a lithographic exposure process, providing a thermal energy to the photoresist layer in a post-exposure baking process, applying an electric field or a magnetic field while performing the post-exposure baking process, and drifting photoacid from the photoresist layer to a predetermined portion of the underlayer under the first portion of the photoresist layer.
    Type: Application
    Filed: March 20, 2020
    Publication date: September 23, 2021
    Inventors: Huixiong DAI, Srinivas D. NEMANI, Steven Hiloong WELCH, Mangesh Ashok BANGAR, Ellie Y. YIEH
  • Patent number: 11114306
    Abstract: Embodiments of the present invention provide an apparatus and methods for depositing a dielectric material using RF bias pulses along with remote plasma source deposition for manufacturing semiconductor devices, particularly for filling openings with high aspect ratios in semiconductor applications. In one embodiment, a method of depositing a dielectric material includes providing a gas mixture into a processing chamber having a substrate disposed therein, forming a remote plasma in a remote plasma source and delivering the remote plasma to an interior processing region defined in the processing chamber, applying a RF bias power to the processing chamber in pulsed mode, and forming a dielectric material in an opening defined in a material layer disposed on the substrate in the presence of the gas mixture and the remote plasma.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: September 7, 2021
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Bhargav Citla, Jethro Tannos, Jingyi Li, Douglas A. Buchberger, Jr., Zhong Qiang Hua, Srinivas D. Nemani, Ellie Y. Yieh
  • Patent number: 11114333
    Abstract: Methods for depositing a gapfill dielectric film that may be utilized for multi-colored patterning processes are provided. In one implementation, a method for processing a substrate is provided. The method comprises filling the one or more features of a substrate with a dielectric material. The dielectric material is a doped silicate glass selected from borophosphosilicate glass (BPSG), phosphosilicate glass (PSG), and borosilicate glass (BSG). The method further comprises treating the substrate with a high-pressure anneal in the presence of an oxidizer to heal seams within the dielectric material. The high-pressure anneal comprises supplying an oxygen-containing gas mixture on a substrate in a processing chamber, maintaining the oxygen-containing gas mixture in the processing chamber at a process pressure at greater than 2 bar and thermally annealing the dielectric material in the presence of the oxygen-containing gas mixture.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: September 7, 2021
    Assignee: Micromaterials, LLC
    Inventors: Srinivas D. Nemani, Ellie Y. Yieh, Chentsau Ying
  • Patent number: 11112697
    Abstract: Embodiments described herein relate to methods and apparatus for performing immersion field guided post exposure bake processes. Embodiments of apparatus described herein include a chamber body defining a processing volume. A pedestal may be disposed within the processing volume and a first electrode may be coupled to the pedestal. A moveable stem may extend through the chamber body opposite the pedestal and a second electrode may be coupled to the moveable stem. In certain embodiments, a fluid containment ring may be coupled to the pedestal and a dielectric containment ring may be coupled to the second electrode.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: September 7, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Viachslav Babayan, Douglas A. Buchberger, Jr., Qiwei Liang, Ludovic Godet, Srinivas D. Nemani, Daniel J. Woodruff, Randy Harris, Robert B. Moore
  • Publication number: 20210257221
    Abstract: The present disclosure provides methods for performing an annealing process on a metal containing layer in TFT display applications, semiconductor or memory applications. In one example, a method of forming a metal containing layer on a substrate includes supplying an oxygen containing gas mixture on a substrate in a processing chamber, the substrate comprising a metal containing layer disposed on an optically transparent substrate, maintaining the oxygen containing gas mixture in the processing chamber at a process pressure between about 2 bar and about 50 bar, and thermally annealing the metal containing layer in the presence of the oxygen containing gas mixture.
    Type: Application
    Filed: May 4, 2021
    Publication date: August 19, 2021
    Inventors: Kaushal K. SINGH, Mei-Yee SHEK, Srinivas D. NEMANI, Ellie Y. YIEH
  • Publication number: 20210257252
    Abstract: Generally, examples described herein relate to methods and processing systems for performing multiple processes in a same processing chamber on a flowable gap-fill film deposited on a substrate. In an example, a semiconductor processing system includes a processing chamber and a system controller. The system controller includes a processor and memory. The memory stores instructions, that when executed by the processor cause the system controller to: control a first process within the processing chamber performed on a substrate having thereon a film deposited by a flowable process, and control a second process within the process chamber performed on the substrate having thereon the film. The first process includes stabilizing bonds in the film to form a stabilized film. The second process includes densifying the stabilized film.
    Type: Application
    Filed: February 17, 2020
    Publication date: August 19, 2021
    Inventors: Maximillian CLEMONS, Nikolaos BEKIARIS, Srinivas D. NEMANI
  • Patent number: 11094573
    Abstract: Disclosed herein is an electrostatic chuck (ESC) carrier. The ESC carrier may comprise a carrier substrate having a first surface and a second surface opposite the first surface. A first through substrate opening and a second through substrate opening may pass through the carrier substrate from the first surface to the second surface. A first conductor is in the first through substrate opening, and a second conductor is in the second through substrate opening. The ESC carrier may further comprise a first electrode over the first surface of the carrier substrate and electrically coupled to the first conductor, and a second electrode over the first surface of the carrier substrate and electrically coupled to the second conductor. An oxide layer may be formed over the first electrode and the second electrode.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: August 17, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Jingyu Qiao, Qiwei Liang, Viachslav Babayan, Seshadri Ramaswami, Srinivas D. Nemani
  • Patent number: D941787
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: January 25, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Sultan Malik, Srinivas D. Nemani, Adib M. Khan, Qiwei Liang