Patents by Inventor Nirav Vora

Nirav Vora 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: 20260038543
    Abstract: Memory devices, such as three-dimensional cross-point memory devices, and methods of manufacturing such devices are addressed. Multiple methods of manufacturing such memory devices are described to provide improved protection of replacement gate structures, such as word lines and word line liners. These include multiple processing flows which forming one or more additional barrier structures between structures subject to at least partial removal during the processing flow; wherein some portion of the additional barrier structure(s) will remain at the end of manufacturing.
    Type: Application
    Filed: July 22, 2025
    Publication date: February 5, 2026
    Inventors: Nirav Vora, Zhao Zhao
  • Publication number: 20260035788
    Abstract: Methods, systems, and devices for methods for selectively depositing carbon on substrates by atomic layer deposition are described. The described techniques include single precursor and multiple precursor atomic layer deposition processes. For instance, a device may react a first precursor with a first material and a second material to form a carbon compound on the first material and not the second material. The materials may be associated with different growth delays based on being exposed to the first precursor. Multiple precursors may be used where one or both of the precursors may have different growth delays for the first and second materials.
    Type: Application
    Filed: July 11, 2025
    Publication date: February 5, 2026
    Inventors: Jean-Sebastien Materne Lehn, Parameswara Subramanian, Enrico Varesi, Nirav Vora, Farrell M. Good
  • Publication number: 20260040576
    Abstract: Methods, systems, and devices for memory cell formation in pier and pillar architectures are described. A stack of materials including alternating layers of nitride and oxide may be formed, and a plurality of columns of a third material may be formed in the stack. The third material may be recessed (e.g., laterally) filled with at least an electrode liner and a metal material. Portions of the nitride material and an oxide liner that are adjacent to the third material may be removed, and a second electrode liner may be formed (e.g., in the regions from which the nitride material and oxide liner were removed). Memory cells may be formed after removing the portion of the nitride material and oxide liner such that the cells are in contact with the second electrode liner.
    Type: Application
    Filed: July 16, 2025
    Publication date: February 5, 2026
    Inventors: Lorenzo Fratin, Fabio Pellizzer, Zhao Zhao, Enrico Varesi, Matthew Thorum, Stephen W. Russell, Nirav Vora
  • Patent number: 12522911
    Abstract: Distributor assemblies for vapor transport deposition systems, and methods of conducting vapor transport deposition, are described.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: January 13, 2026
    Assignee: First Solar, Inc.
    Inventors: Zhigang Ban, John Barden, Jerry Drennan, Litian Liu, Rick Powell, Nirav Vora, Yaojun Xu
  • Publication number: 20250361597
    Abstract: Distributor assemblies for vapor transport deposition systems, and methods of conducting vapor transport deposition, are described.
    Type: Application
    Filed: August 8, 2025
    Publication date: November 27, 2025
    Applicant: First Solar, Inc.
    Inventors: John Barden, Rick Powell, Aaron Roggelin, Nirav Vora
  • Publication number: 20250254955
    Abstract: Methods, systems, and devices for memory architectures with replacement gate through piers are described. A memory architecture with relatively uniform memory cell thickness may be formed by forming a stack of materials including alternating layers of sacrificial material and dielectric material. The processing steps may include forming piers and forming cavities for pillars through the stack of materials. The pillars and electrodes may be formed within the cavities, and a subset of the piers may be removed. The layers of sacrificial material may be removed. A protective liner may be deposited around the electrodes and the remaining piers before depositing layers of metal in place of the sacrificial material. The cavities exposed by removing the subset of piers may be filled with new piers. The remaining piers are removed, and memory cells may be formed between the pillars and the electrodes. Then the removed piers are replaced.
    Type: Application
    Filed: July 29, 2024
    Publication date: August 7, 2025
    Inventors: Lorenzo Fratin, Fabio Pellizzer, Rajasekhar Venigalla, Enrico Varesi, Matthew Thorum, Stephen W. Russell, Nirav Vora
  • Publication number: 20240357837
    Abstract: Methods, systems, and devices for contact formation for a memory device are described. A memory device manufacturing operation may include forming bit lines and word lines in a same step. In some cases, the memory device may include word line contact portions that couple respective word lines with respective word line contacts located below the word lines. For example, the word line contact portions may be located between word lines and a substrate of the memory array. In such cases, the processing step may be used for formation of word lines, bit lines, and word line contact portions. Additionally, or alternatively, the memory device manufacturing operation may include forming a sacrificial ring around bit line contacts, which may isolate bit line contacts from a nitride layer.
    Type: Application
    Filed: April 22, 2024
    Publication date: October 24, 2024
    Inventors: Darwin A. Clampitt, Stephen W. Russell, Steven P. Turini, Farrell M. Good, Kolya Yastrebenetsky, Nirav Vora, Zhao Zhao
  • Publication number: 20240247363
    Abstract: Distributor assemblies for vapor transport deposition systems, and methods of conducting vapor transport deposition, are described.
    Type: Application
    Filed: April 5, 2024
    Publication date: July 25, 2024
    Applicant: First Solar, Inc.
    Inventors: Zhigang Ban, John Barden, Jerry Drennan, Litian Liu, Rick Powell, Nirav Vora, Yaojun Xu
  • Publication number: 20210301387
    Abstract: Distributor assemblies for vapor transport deposition systems, and methods of conducting vapor transport deposition, are described.
    Type: Application
    Filed: August 9, 2019
    Publication date: September 30, 2021
    Applicant: First Solar, Inc.
    Inventors: John Barden, Rick Powell, Aaron Roggelin, Nirav Vora
  • Publication number: 20200270744
    Abstract: Distributor assemblies for vapor transport deposition systems, and methods of conducting vapor transport deposition, are described.
    Type: Application
    Filed: October 24, 2018
    Publication date: August 27, 2020
    Applicant: First Solar, Inc.
    Inventors: Zhigang Ban, John Barden, Jerry Drennan, Litian Liu, Rick Powell, Nirav Vora, Yaojun Xu
  • Patent number: 9583667
    Abstract: Systems and methods for forming solar cells with CuInSe2 and Cu(In,Ga)Se2 films are provided. In one embodiment, a method comprises: during a first stage (220), performing a mass transport through vapor transport of an indium chloride (InClx) vapor (143, 223) and Se vapor (121, 225) to deposit a semiconductor film (212, 232, 252) upon a substrate (114, 210, 230, 250); heating the substrate (114, 210, 230, 250) and the semiconductor film to a desired temperature (112); during a second stage (240) following the first stage (220), performing a mass transport through vapor transport of a copper chloride (CuClx) vapor (143, 243) and Se vapor (121, 245) to the semiconductor film (212, 232, 252); and during a third stage (260) following the second stage (240), performing a mass transport through vapor transport of an indium chloride (InClx) vapor (143, 263) and Se vapor (121, 265) to the semiconductor film (212, 232, 252).
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: February 28, 2017
    Assignees: Alliance for Sustainable Energy, LLC, Abengoa Solar New Technologies, S.A.
    Inventors: David S. Albin, Nirav Vora, Sebastian Caparros Jimenez, Joaquin Murillo Gutierrez, Emilio Sanchez Cortezon, Manuel Romero
  • Publication number: 20150079724
    Abstract: Systems and methods for forming solar cells with CuInSe2 and Cu(In,Ga)Se2 films are provided. In one embodiment, a method comprises: during a first stage (220), performing a mass transport through vapor transport of an indium chloride (InClx) vapor (143, 223) and Se vapor (121, 225) to deposit a semiconductor film (212, 232, 252) upon a substrate (114, 210, 230, 250); heating the substrate (114, 210, 230, 250) and the semiconductor film to a desired temperature (112); during a second stage (240) following the first stage (220), performing a mass transport through vapor transport of a copper chloride (CuClx) vapor (143, 243) and Se vapor (121, 245) to the semiconductor film (212, 232, 252); and during a third stage (260) following the second stage (240), performing a mass transport through vapor transport of an indium chloride (InClx) vapor (143, 263) and Se vapor (121, 265) to the semiconductor film (212, 232, 252).
    Type: Application
    Filed: February 27, 2013
    Publication date: March 19, 2015
    Inventors: David S. Albin, Nirav Vora, Sebastian Caparros Jimenez, Joaquin Murillo Gutierrez, Emilio Sanchez Cortezon