Patents by Inventor Chandra S. Tiwari

Chandra S. Tiwari 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: 20240071819
    Abstract: A variety of applications can include apparatus having a memory device structured with a three-dimensional array of memory cells and one or more vertical metal contacts extending through levels of the memory device, where the one or more vertical metal contacts are formed with reduced stress. Each of the one or more vertical metal contacts can be constructed by forming a liner on walls of an opening in a dielectric, where the opening extends through the levels for the memory device, and forming a metal composition adjacent the liner and filling the opening with the metal composition. The liner can be removed from at least a portion of the walls of the dielectric, where the liner has a composition correlated to the metal composition such that removal of the liner reduces stress on the metal composition.
    Type: Application
    Filed: August 15, 2023
    Publication date: February 29, 2024
    Inventors: Chandra S. Tiwari, Jivaan Kishore Jhothiraman, Rutuparna Narulkar, Nayan Chakravarty, Pengyuan Zheng, Hiroaki Iuchi
  • Publication number: 20240057337
    Abstract: Microelectronic devices include a stack structure comprising a vertically alternating sequence of insulative structures and conductive structures arranged in tiers. A series of pillars extends through the stack structure. At least one isolation structure extends through an upper stack portion of the stack structure. The at least one isolation structure protrudes into pillars of neighboring columns of pillars of the series of pillars. Conductive contacts are in electrical communication with the pillars into which the at least one isolation structure protrudes. Related methods and electronic systems are also disclosed.
    Type: Application
    Filed: October 23, 2023
    Publication date: February 15, 2024
    Inventors: Matthew J. King, David A. Daycock, Yoshiaki Fukuzumi, Albert Fayrushin, Richard J. Hill, Chandra S. Tiwari, Jun Fujiki
  • Publication number: 20230378069
    Abstract: An electronic device includes a stack structure, the stack structure including at least one deck including tiers of vertically alternating dielectric materials and conductive materials, an opening extending through the at least one deck, a compressive dielectric material disposed on a bottom surface defining the opening and on sidewalls of the tiers defining the opening, and a dielectric material in direct contact with the compressive dielectric material. The dielectric material substantially fills a remainder of the opening. The compressive dielectric material exhibits a horizontal compressive force against the tiers. Related methods and systems are also disclosed.
    Type: Application
    Filed: May 20, 2022
    Publication date: November 23, 2023
    Inventors: Jivaan Kishore Jhothiraman, Rutuparna Narulkar, Chandra S. Tiwari
  • Patent number: 11800717
    Abstract: Microelectronic devices include a stack structure comprising a vertically alternating sequence of insulative structures and conductive structures arranged in tiers. A series of pillars extends through the stack structure. At least one isolation structure extends through an upper stack portion of the stack structure. The at least one isolation structure protrudes into pillars of neighboring columns of pillars of the series of pillars. Conductive contacts are in electrical communication with the pillars into which the at least one isolation structure protrudes. Related methods and electronic systems are also disclosed.
    Type: Grant
    Filed: May 2, 2022
    Date of Patent: October 24, 2023
    Inventors: Matthew J. King, David A. Daycock, Yoshiaki Fukuzumi, Albert Fayrushin, Richard J. Hill, Chandra S. Tiwari, Jun Fujiki
  • Publication number: 20230335439
    Abstract: A microelectronic device comprises a stack structure comprising alternating conductive structures and insulative structures. Memory cells vertically extend through the stack structure, and comprise a channel material vertically extending through the stack structure. An additional stack structure vertically overlies the stack structure and comprises additional conductive structures and additional insulative structures. First pillar structures extend through the additional stack structure and vertically overlie a portion of the memory cells. Second pillar structures are adjacent to the first pillar structures and extend through the additional stack structure and vertically overlie another portion of the memory cells. Slot structures are laterally adjacent to the first pillar structures and to the second pillar structures and extend through at least a portion of the additional stack structure.
    Type: Application
    Filed: April 14, 2022
    Publication date: October 19, 2023
    Inventors: Chandra S. Tiwari, David A. Kewley, Deep Panjwani, Matthew Holland, Matthew J. King, Michael E. Koltonski, Tom J. John, Xiaosong Zhang, Yi Hu
  • Publication number: 20230061820
    Abstract: A method comprising forming a stack precursor comprising alternating first materials and second materials, the first materials and the second materials exhibit different melting points. A portion of the alternating first materials and second materials is removed to form a pillar opening through the alternating first materials and second materials. A sacrificial material is formed in the pillar opening. The first materials are removed to form first spaces between the second materials, the first materials formulated to be in a liquid phase or in a gas phase at a first removal temperature. A conductive material is formed in the first spaces. The second materials are removed to form second spaces between the conductive materials, the second materials formulated to be in a liquid phase or in a gas phase at a second removal temperature. A dielectric material is formed in the second spaces. The sacrificial material is removed from the pillar opening and cell materials are formed in the pillar opening.
    Type: Application
    Filed: October 17, 2022
    Publication date: March 2, 2023
    Inventors: Chandra S. Tiwari, Kunal Shrotri
  • Patent number: 11476268
    Abstract: A method comprising forming a stack precursor comprising alternating first materials and second materials, the first materials and the second materials exhibit different melting points. A portion of the alternating first materials and second materials is removed to form a pillar opening through the alternating first materials and second materials. A sacrificial material is formed in the pillar opening. The first materials are removed to form first spaces between the second materials, the first materials formulated to be in a liquid phase or in a gas phase at a first removal temperature. A conductive material is formed in the first spaces. The second materials are removed to form second spaces between the conductive materials, the second materials formulated to be in a liquid phase or in a gas phase at a second removal temperature. A dielectric material is formed in the second spaces. The sacrificial material is removed from the pillar opening and cell materials are formed in the pillar opening.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: October 18, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Chandra S. Tiwari, Kunal Shrotri
  • Publication number: 20220262820
    Abstract: Microelectronic devices include a stack structure comprising a vertically alternating sequence of insulative structures and conductive structures arranged in tiers. A series of pillars extends through the stack structure. At least one isolation structure extends through an upper stack portion of the stack structure. The at least one isolation structure protrudes into pillars of neighboring columns of pillars of the series of pillars. Conductive contacts are in electrical communication with the pillars into which the at least one isolation structure protrudes. Related methods and electronic systems are also disclosed.
    Type: Application
    Filed: May 2, 2022
    Publication date: August 18, 2022
    Inventors: Matthew J. King, David A. Daycock, Yoshiaki Fukuzumi, Albert Fayrushin, Richard J. Hill, Chandra S. Tiwari, Jun Fujiki
  • Patent number: 11402426
    Abstract: A testing probe apparatus for testing die. The testing probe may include a probe interface and a carrier for supporting at least one die comprising 3D interconnect (3DI) structures. The probe interface may be positionable on a first side of the at least one die and include a voltage source and at least one first inductor operably coupled to the voltage source. A voltage sensor and at least one second inductor coupled to the voltage sensor may be disposed on a second opposing side of the at least one die. The voltage source of the probe interface may be configured to inductively cause a voltage within the 3DI structures of the at least one die via the at least one first inductor. The voltage sensor may be configured to sense a voltage within the at least one 3DI structure via the at least one second inductor. Related systems and methods are also disclosed.
    Type: Grant
    Filed: October 28, 2020
    Date of Patent: August 2, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Tony M. Lindenberg, Kurt J. Bossart, Jonathan S. Hacker, Chandra S. Tiwari
  • Patent number: 11322516
    Abstract: Microelectronic devices include a stack structure comprising a vertically alternating sequence of insulative structures and conductive structures arranged in tiers. A series of pillars extends through the stack structure. At least one isolation structure extends through an upper stack portion of the stack structure. The at least one isolation structure protrudes into pillars of neighboring columns of pillars of the series of pillars. Conductive contacts are in electrical communication with the pillars into which the at least one isolation structure protrudes. Related methods and electronic systems are also disclosed.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: May 3, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Matthew J. King, David A. Daycock, Yoshiaki Fukuzumi, Albert Fayrushin, Richard J. Hill, Chandra S. Tiwari, Jun Fujiki
  • Patent number: 11276658
    Abstract: Methods of forming supports for 3D structures on semiconductor structures comprise forming the supports from photodefinable materials by deposition, selective exposure and curing. Semiconductor dice including 3D structures having associated supports, and semiconductor devices are also disclosed.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: March 15, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Christopher J. Gambee, Nhi Doan, Chandra S. Tiwari, Owen R. Fay, Ying Chen
  • Publication number: 20220068955
    Abstract: Microelectronic devices include a stack structure comprising a vertically alternating sequence of insulative structures and conductive structures arranged in tiers. A series of pillars extends through the stack structure. At least one isolation structure extends through an upper stack portion of the stack structure. The at least one isolation structure protrudes into pillars of neighboring columns of pillars of the series of pillars. Conductive contacts are in electrical communication with the pillars into which the at least one isolation structure protrudes. Related methods and electronic systems are also disclosed.
    Type: Application
    Filed: August 31, 2020
    Publication date: March 3, 2022
    Inventors: Matthew J. King, David A. Daycock, Yoshiaki Fukuzumi, Albert Fayrushin, Richard J. Hill, Chandra S. Tiwari, Jun Fujiki
  • Publication number: 20210375898
    Abstract: A method comprising forming a stack precursor comprising alternating first materials and second materials, the first materials and the second materials exhibit different melting points. A portion of the alternating first materials and second materials is removed to form a pillar opening through the alternating first materials and second materials. A sacrificial material is formed in the pillar opening. The first materials are removed to form first spaces between the second materials, the first materials formulated to be in a liquid phase or in a gas phase at a first removal temperature. A conductive material is formed in the first spaces. The second materials are removed to form second spaces between the conductive materials, the second materials formulated to be in a liquid phase or in a gas phase at a second removal temperature. A dielectric material is formed in the second spaces. The sacrificial material is removed from the pillar opening and cell materials are formed in the pillar opening.
    Type: Application
    Filed: May 29, 2020
    Publication date: December 2, 2021
    Inventors: Chandra S. Tiwari, Kunal Shrotri
  • Patent number: 11094684
    Abstract: A semiconductor device assembly that includes a first side of a semiconductor device supported on a substrate to permit the processing of a second side of the semiconductor device. A filler material deposited on the semiconductor device supports the semiconductor device on the substrate. The filler material does not adhere to the semiconductor device or the substrate. Alternatively, the filler material may be deposited on the substrate. Instead of a filler material, the substrate may include a topography configured to support the semiconductor device. Adhesive applied between an outer edge of the first side of the semiconductor and the substrate bonds the outer edge of the semiconductor device to the substrate to form a semiconductor device assembly. A second side of the semiconductor device may then be processed and the outer edge of the semiconductor device may be cut off to release the semiconductor device from the assembly.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: August 17, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Chandra S. Tiwari, Tony M. Lindenberg, Jonathan S. Hacker, Christopher J. Gambee, Kurt J. Bossart
  • Publication number: 20210041495
    Abstract: A testing probe apparatus for testing die. The testing probe may include a probe interface and a carrier for supporting at least one die comprising 3D interconnect (3DI) structures. The probe interface may be positionable on a first side of the at least one die and include a voltage source and at least one first inductor operably coupled to the voltage source. A voltage sensor and at least one second inductor coupled to the voltage sensor may be disposed on a second opposing side of the at least one die. The voltage source of the probe interface may be configured to inductively cause a voltage within the 3DI structures of the at least one die via the at least one first inductor. The voltage sensor may be configured to sense a voltage within the at least one 3DI structure via the at least one second inductor. Related systems and methods are also disclosed.
    Type: Application
    Filed: October 28, 2020
    Publication date: February 11, 2021
    Inventors: Tony M. Lindenberg, Kurt J. Bossart, Jonathan S. Hacker, Chandra S. Tiwari
  • Patent number: 10896886
    Abstract: Semiconductor devices having discretely located passivation material are disclosed herein. In one embodiment, a semiconductor device assembly can include a bond pad having a bonding surface with a process artifact. A passivation material can be positioned to at least partially fill a portion of the process artifact. A conductive structure can be positioned to extend across the bonding surface of the bond pad.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: January 19, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Mayukhee Das, Jonathan S. Hacker, Christopher J. Gambee, Chandra S. Tiwari
  • Patent number: 10852344
    Abstract: A testing probe apparatus for testing die. The testing probe may include a probe interface and a carrier for supporting at least one die comprising 3DI structures. The probe interface may be positionable on a first side of the at least one die and include a voltage source and at least one first inductor operably coupled to the voltage source. A voltage sensor and at least one second inductor coupled to the voltage sensor may be disposed on a second opposing side of the at least one die. The voltage source of the probe interface may be configured to inductively cause a voltage within the 3DI structures of the at least one die via the at least one first inductor. The voltage sensor may be configured to sense a voltage within the at least one 3DI structure via the at least one second inductor. Related systems and methods are also disclosed.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: December 1, 2020
    Assignee: Micron Technology, Inc.
    Inventors: Tony M. Lindenberg, Kurt J. Bossart, Jonathan S. Hacker, Chandra S. Tiwari
  • Publication number: 20200365542
    Abstract: Methods of forming supports for 3D structures on semiconductor structures comprise forming the supports from photodefinable materials by deposition, selective exposure and curing. Semiconductor dice including 3D structures having associated supports, and semiconductor devices are also disclosed.
    Type: Application
    Filed: August 6, 2020
    Publication date: November 19, 2020
    Applicant: Micron Technology, Inc.
    Inventors: Christopher J. Gambee, Nhi Doan, Chandra S. Tiwari, Owen R. Fay, Ying Chen
  • Patent number: 10790251
    Abstract: Methods of forming supports for 3D structures on semiconductor structures comprise forming the supports from photodefinable materials by deposition, selective exposure and curing. Semiconductor dice including 3D structures having associated supports, and semiconductor devices are also disclosed.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: September 29, 2020
    Assignee: Micron Technology, Inc.
    Inventors: Christopher J. Gambee, Nhi Doan, Chandra S. Tiwari, Owen R. Fay, Ying Chen
  • Publication number: 20190393176
    Abstract: Methods of forming supports for 3D structures on semiconductor structures comprise forming the supports from photodefinable materials by deposition, selective exposure and curing. Semiconductor dice including 3D structures having associated supports, and semiconductor devices are also disclosed.
    Type: Application
    Filed: June 20, 2018
    Publication date: December 26, 2019
    Inventors: Christopher J. Gambee, Nhi Doan, Chandra S. Tiwari, Owen R. Fay, Ying Chen