Patents by Inventor John Hoang

John Hoang 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: 12628349
    Abstract: Channel material is conformally deposited along sidewalls of one or more etched features of a mold stack in fabricating a three-terminal memory device. The channel material is deposited in recessed regions and non-recessed regions of the one or more etched features. A sacrificial liner is deposited on the channel material. A directional etch removes the sacrificial liner from non-recessed regions of the one or more etched features. An isotropic etch removes the channel material from non-recessed regions of the one or more etched features, leaving the channel material and the sacrificial liner intact in the recessed regions. The sacrificial liner is removed, leaving the channel material intact and isolated with minimal loss of channel material from over-etch.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: May 12, 2026
    Assignee: Lam Research Corporation
    Inventors: John Hoang, Meihua Shen, Thorsten Bernd Lill, Hui-Jung Wu, Aaron Lynn Routzahn, Francis Sloan Roberts
  • Publication number: 20250326411
    Abstract: Assemblies, systems, and methods for inspecting vehicles are disclosed. An assembly can comprise one or more cameras, one or more light sources s, and a housing configured to attach to a railway. The one or more cameras can be configured to capture images in a generally vertical direction and can be located below a top surface of one or more ties of a railway when the inspection assembly is attached to the railway. The housing can comprise a base a base configured to at least partially support the one or more cameras and the one or more light sources and a shroud sloped downwardly in a direction extending away from the one or more cameras.
    Type: Application
    Filed: June 27, 2025
    Publication date: October 23, 2025
    Inventors: Mabby Nicholas Amouie, Evan Thomas Gebhardt, Colin Usher, Alex Samoylov, John Hoang, Sean Thomas, Parth Mandrekar, Brian Thomas Yeager, Thomas Samuel Fox
  • Publication number: 20250319913
    Abstract: Assemblies, systems, and methods for inspecting vehicles are disclosed. An assembly can comprise a first angled camera, a second angled camera, an upright camera, lights, and a housing configured to attach to a railway. The first angled camera can be oriented at least partially in a generally vertical direction and at least partially in a first horizontal direction, and directed to a first target region from a first viewpoint. The second angled camera can be oriented at least partially in the generally vertical direction and at least partially in a second horizontal direction, and directed to a second target region from a second viewpoint. The upright camera can be oriented substantially in a vertical direction, and configured to capture images of a third target region from a third viewpoint.
    Type: Application
    Filed: June 27, 2025
    Publication date: October 16, 2025
    Inventors: Mabby Nicholas Amouie, Evan Thomas Gebhardt, Colin Usher, Alex Samoylov, John Hoang, Sean Thomas, Parth Mandrekar, Brian Thomas Yeager, Thomas Samuel Fox
  • Publication number: 20250308894
    Abstract: Various embodiments herein relate to methods, apparatus, and systems for etching high aspect ratio features in dielectric material. The dielectric material is etched using a multi-layer or graded hardmask having at least two different compositions. Different etching regimes are used when the different portions of the hardmask are exposed. For example, a feature may be etched to a first depth at a first temperature while an upper portion of the hardmask is exposed, and then etched to a final depth at a second temperature while a lower portion of the hardmask is exposed, the second temperature being higher than the first temperature.
    Type: Application
    Filed: May 16, 2023
    Publication date: October 2, 2025
    Inventors: Thorsten Bernd LILL, Ragesh PUTHENKOVILAKAM, Kapu Sirish REDDY, John HOANG, Meihua SHEN, Hui-Jung WU, Sonal BHADAURIYA, Hao CHI, Aaron Lynn ROUTZAHN, Anthony Sky YU, Francis Sloan ROBERTS
  • Publication number: 20250282401
    Abstract: An inspection assembly can comprise a first camera, a second camera, one or more lights, and a housing. The first camera can be angled at least partially in a vertical direction and at least partially in a horizontal direction to thereby be configured to capture images of a target region in a three-dimensional space from a first viewpoint. The second camera can be positioned apart from the first camera, angled at least partially in the vertical direction and at least partially in the horizontal direction, and directed to the target region from a second viewpoint that is different from the first viewpoint. The housing can comprise a base and a shroud and can be configured to attach to one or more rail ties and to at least partially envelop the first camera and the second camera.
    Type: Application
    Filed: May 27, 2025
    Publication date: September 11, 2025
    Inventors: Mabby Nicholas Amouie, Evan Thomas Gebhardt, Colin Usher, Alex Samoylov, John Hoang, Sean Thomas, Parth Mandrekar, Brian Thomas Yeager, Thomas Samuel Fox
  • Patent number: 12365373
    Abstract: Assemblies, systems, and methods for inspecting vehicles are disclosed. An assembly can comprise a first angled camera, a second angled camera, an upright camera, lights, and a housing configured to attach to a railway between opposing rails. The first angled camera can be oriented at least partially in a vertical direction and at least partially in a first horizontal direction, and directed to a first target region from a first viewpoint. The second angled camera can be oriented at least partially in the vertical direction and at least partially in a second horizontal direction that is substantially opposite the first horizontal direction, and directed to a second target region from a second viewpoint. The upright camera can be oriented substantially in a vertical direction, and configured to capture images of a third target region from a third viewpoint.
    Type: Grant
    Filed: September 9, 2024
    Date of Patent: July 22, 2025
    Assignee: Norfolk Southern Corporation & Georgia Tech Research Corporation
    Inventors: Mabby Nicholas Amouie, Evan Thomas Gebhardt, Colin Usher, Alex Samoylov, John Hoang, Sean Thomas, Parth Mandrekar, Brian Thomas Yeager, Thomas Samuel Fox
  • Patent number: 12348880
    Abstract: An inspection assembly can comprise a first camera, a second camera, one or more lights, and a housing. The first camera can be angled at least partially in a vertical direction and at least partially in a horizontal direction to thereby be configured to capture images of a target region in a three-dimensional space from a first viewpoint. The second camera can be positioned apart from the first camera, angled at least partially in the vertical direction and at least partially in the horizontal direction, and directed to the target region from a second viewpoint that is different from the first viewpoint. The housing can comprise a base and a shroud and can be configured to attach to one or more rail ties and to at least partially envelop the first camera and the second camera.
    Type: Grant
    Filed: September 9, 2024
    Date of Patent: July 1, 2025
    Assignee: Norfolk Southern Corporation & Georgia Tech Research Corporation
    Inventors: Mabby Nicholas Amouie, Evan Thomas Gebhardt, Colin Usher, Alex Samoylov, John Hoang, Sean Thomas, Parth Mandrekar, Brian Thomas Yeager, Thomas Samuel Fox
  • Publication number: 20250118568
    Abstract: Examples are disclosed that relate to etching features in a layer of silicon oxide doped with an etch rate-modifying dopant. One example provides a method of performing a memory device fabrication process. The method comprises placing a substrate in a processing chamber of a processing tool, the substrate comprising a first structure comprising alternating layers in a mold stack for a 3D memory structure, and the substrate also comprising a second structure comprising a silicon oxide layer doped with an etch rate-modifying dopant. The method further comprises controlling the processing tool to perform an etching cycle comprising etching at least a portion of a channel hole in the first structure of the substrate and at least a portion of a hole in the second structure of the substrate.
    Type: Application
    Filed: May 23, 2023
    Publication date: April 10, 2025
    Inventors: Jonathan CHURCH, Pramod SUBRAMONIUM, Mehmet Fatih YILMAZ, Joseph James VEGH, Hao CHI, John HOANG
  • Publication number: 20250090708
    Abstract: Embodiments disclosed include autonomous robotic systems and methods for disinfecting an environment. An autonomous disinfecting system comprises, in a housing, a first unit comprising a first plurality of UV-C lamps attached to a first wireless base comprising a plurality of wheels. Preferably, the first unit further comprises a docking port for a second unit comprising a second plurality of UV-C lamps attached to a second wireless base, and a motion sensor configured to send a signal to a processing unit comprised in the autonomous disinfecting system wherein the processing unit is configured to shut down the system when it receives a signal indicating a detected movement.
    Type: Application
    Filed: December 5, 2024
    Publication date: March 20, 2025
    Inventors: Sherylinn Hoang, John Hoang
  • Publication number: 20250088760
    Abstract: An inspection assembly can comprise a first camera, a second camera, one or more lights, and a housing. The first camera can be angled at least partially in a vertical direction and at least partially in a horizontal direction to thereby be configured to capture images of a target region in a three-dimensional space from a first viewpoint. The second camera can be positioned apart from the first camera, angled at least partially in the vertical direction and at least partially in the horizontal direction, and directed to the target region from a second viewpoint that is different from the first viewpoint. The housing can comprise a base and a shroud and can be configured to attach to one or more rail ties and to at least partially envelop the first camera and the second camera.
    Type: Application
    Filed: September 9, 2024
    Publication date: March 13, 2025
    Inventors: Mabby Nicholas Amouie, Evan Thomas Gebhardt, Colin Usher, Alex Samoylov, John Hoang, Sean Thomas, Parth Mandrekar, Brian Thomas Yeager, Thomas Samuel Fox
  • Publication number: 20250088759
    Abstract: Assemblies, systems, and methods for inspecting vehicles are disclosed. An assembly can comprise a first angled camera, a second angled camera, an upright camera, lights, and a housing configured to attach to a railway between opposing rails. The first angled camera can be oriented at least partially in a vertical direction and at least partially in a first horizontal direction, and directed to a first target region from a first viewpoint. The second angled camera can be oriented at least partially in the vertical direction and at least partially in a second horizontal direction that is substantially opposite the first horizontal direction, and directed to a second target region from a second viewpoint. The upright camera can be oriented substantially in a vertical direction, and configured to capture images of a third target region from a third viewpoint.
    Type: Application
    Filed: September 9, 2024
    Publication date: March 13, 2025
    Inventors: Mabby Nicholas Amouie, Evan Thomas Gebhardt, Colin Usher, Alex Samoylov, John Hoang, Sean Thomas, Parth Mandrekar, Brian Thomas Yeager, Thomas Samuel Fox
  • Publication number: 20250083720
    Abstract: Railcar inspection systems, methods, and apparatuses are disclosed, including a railcar inspection portal. The railcar inspection portal includes a physical structure positioned around a railroad track, and through which a railcar can travel. The railcar inspection portal can include wheel detection sensors along the railroad track for detecting the presence of a railcar passing over the sensors. The sensors can transmit signals, corresponding to railcars passing over the sensors, to computing devices for determining railcar speeds. The railcar inspection portal can include imaging devices configured to capture images and readings of railcars passing through the inspection portal. Based on a determined speed corresponding to a passing railcar, the computing devices can control the imaging devices to capture specific areas or components of the passing railcar, or individual cars thereon.
    Type: Application
    Filed: September 9, 2024
    Publication date: March 13, 2025
    Inventors: Mabby Nicholas Amouie, Evan Thomas Gebhardt, Alex Samoylov, Sean Thomas, John Hoang
  • Patent number: 12201740
    Abstract: Embodiments disclosed include autonomous robotic systems and methods for disinfecting an environment. An autonomous disinfecting system comprises, in a housing, a first unit comprising a first plurality of UV-C lamps attached to a first wireless base comprising a plurality of wheels. Preferably, the first unit further comprises a docking port for a second unit comprising a second plurality of UV-C lamps attached to a second wireless base, and a motion sensor configured to send a signal to a processing unit comprised in the autonomous disinfecting system wherein the processing unit is configured to shut down the system when it receives a signal indicating a detected movement.
    Type: Grant
    Filed: August 7, 2023
    Date of Patent: January 21, 2025
    Inventors: Sherylinn Hoang, John Hoang
  • Publication number: 20240387258
    Abstract: Methods for forming patterned multi-layer stacks including a metal-containing layer are provided herein. Methods involve using silicon-containing non-metal materials in a multi-layer stack including one sacrificial layer to be later removed and replaced with metal while maintaining etch contrast to pattern the multi-layer stack and selectively remove the sacrificial layer prior to depositing metal. Methods involve using silicon oxycarbide in lieu of silicon nitride, and a sacrificial non-metal material in lieu of a metal-containing layer, to fabricate the multi-layer stack, pattern the multi-layer stack, selectively remove the sacrificial non-metal material to leave spaces in the stack, and deposit metal-containing material into the spaces. Sacrificial non-metal materials include silicon nitride and doped polysilicon, such as boron-doped silicon.
    Type: Application
    Filed: July 26, 2024
    Publication date: November 21, 2024
    Inventors: Hui-Jung Wu, Bart J. Van Schravendijk, Mark Naoshi Kawaguchi, Gereng Gunawan, Jay E. Uglow, Nagraj Shankar, Gowri Channa Kamarthy, Kevin M. McLaughlin, Ananda K. Banerji, Jialing Yang, John Hoang, Aaron Lynn Routzahn, Nathan Musselwhite, Meihua Shen, Thorsten Bernd Lill, Hao Chi, Nicholas Dominic Altieri
  • Publication number: 20240381790
    Abstract: A layer of a chalcogenide material can be etched by providing a wafer having a layer of the chalcogenide material to a processing chamber, heating the wafer to a first temperature, modifying a surface of the layer of chalcogenide material by flowing a first chemical species comprising a fluoride or a chloride onto the wafer to create a modified layer of chalcogenide material while the wafer is at the first temperature, and removing the modified layer of chalcogenide material, without using a plasma, by flowing a second chemical species comprising a compound with a center atom that is aluminum, boron, silicon, or germanium, and with at least one chlorine, onto the wafer.
    Type: Application
    Filed: September 4, 2022
    Publication date: November 14, 2024
    Inventors: John Hoang, Aaron Lynn Routzahn, Andreas Fischer, Meihua Shen, Thorsten Bernd Lill, Seshasayee Varadarajan
  • Patent number: 12080592
    Abstract: Methods for forming patterned multi-layer stacks including a metal-containing layer are provided herein. Methods involve using silicon-containing non-metal materials in a multi-layer stack including one sacrificial layer to be later removed and replaced with metal while maintaining etch contrast to pattern the multi-layer stack and selectively remove the sacrificial layer prior to depositing metal. Methods involve using silicon oxycarbide in lieu of silicon nitride, and a sacrificial non-metal material in lieu of a metal-containing layer, to fabricate the multi-layer stack, pattern the multi-layer stack, selectively remove the sacrificial non-metal material to leave spaces in the stack, and deposit metal-containing material into the spaces. Sacrificial non-metal materials include silicon nitride and doped polysilicon, such as boron-doped silicon.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: September 3, 2024
    Assignee: Lam Research Corporation
    Inventors: Hui-Jung Wu, Bart J. van Schravendijk, Mark Naoshi Kawaguchi, Gereng Gunawan, Jay E. Uglow, Nagraj Shankar, Gowri Channa Kamarthy, Kevin M. McLaughlin, Ananda K. Banerji, Jialing Yang, John Hoang, Aaron Lynn Routzahn, Nathan Musselwhite, Meihua Shen, Thorsten Bernd Lill, Hao Chi, Nicholas Dominic Altieri
  • Publication number: 20240033387
    Abstract: Embodiments disclosed include autonomous robotic systems and methods for disinfecting an environment. An autonomous disinfecting system comprises, in a housing, a first unit comprising a first plurality of UV-C lamps attached to a first wireless base comprising a plurality of wheels. Preferably, the first unit further comprises a docking port for a second unit comprising a second plurality of UV-C lamps attached to a second wireless base, and a motion sensor configured to send a signal to a processing unit comprised in the autonomous disinfecting system wherein the processing unit is configured to shut down the system when it receives a signal indicating a detected movement.
    Type: Application
    Filed: August 7, 2023
    Publication date: February 1, 2024
    Inventors: Sherylinn Hoang, John Hoang
  • Patent number: 11832533
    Abstract: Methods and apparatuses for forming an encapsulation bilayer over a chalcogenide material on a semiconductor substrate are provided. Methods involve forming a bilayer including a barrier layer directly on chalcogenide material deposited using pulsed plasma plasma-enhanced chemical vapor deposition (PP-PECVD) and an encapsulation layer over the barrier layer deposited using plasma-enhanced atomic layer deposition (PEALD). In various embodiments, the barrier layer is formed using a halogen-free silicon precursor and the encapsulation layer deposited by PEALD is formed using a halogen-containing silicon precursor and a hydrogen-free nitrogen-containing reactant.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: November 28, 2023
    Assignee: Lam Research Corporation
    Inventors: James Samuel Sims, Andrew John McKerrow, Meihua Shen, Thorsten Lill, Shane Tang, Kathryn Merced Kelchner, John Hoang, Alexander Dulkin, Danna Qian, Vikrant Rai
  • Patent number: 11792987
    Abstract: A three-dimensional (3D) memory structure includes memory cells and a plurality of oxide layers and a plurality of word line layers. The plurality of oxide layers and the plurality of word line layers are alternately stacked in a first direction. A plurality of double channel holes extend through the plurality of oxide layers and the plurality of word line layers in the first direction. The plurality of double channel holes have a peanut-shaped cross-section in a second direction that is transverse to the first direction.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: October 17, 2023
    Assignee: LAM RESEARCH CORPORATION
    Inventors: Thorsten Lill, Meihua Shen, John Hoang, Hui-Jung Wu, Gereng Gunawan, Yang Pan
  • Patent number: 11723998
    Abstract: Embodiments disclosed include autonomous robotic systems and methods for disinfecting an environment. An autonomous disinfecting system comprises, in a housing, a first unit comprising a first plurality of UV-C lamps attached to a first wireless base comprising a plurality of wheels. Preferably, the first unit further comprises a docking port for a second unit comprising a second plurality of UV-C lamps attached to a second wireless base, and a motion sensor configured to send a signal to a processing unit comprised in the autonomous disinfecting system wherein the processing unit is configured to shut down the system when it receives a signal indicating a detected movement.
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: August 15, 2023
    Inventors: Sherylinn Hoang, John Hoang