Patents by Inventor Sandeepan DasGupta

Sandeepan DasGupta 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: 11705197
    Abstract: Methods, systems, and devices for a modified write voltage for memory devices are described. In an example, the memory device may determine a first set of memory cells to be switched from a first logic state (e.g., a SET state) to a second logic state (e.g., a RESET state) based on a received write command. The memory device may perform a read operation to determine a subset of the first set of memory cells (e.g., a second set of memory cells) having a conductance threshold satisfying a criteria based on a predicted drift of the memory cells. The memory device may apply a RESET pulse to each of the memory cells within the first set of memory cells, where the RESET pulse applied to the second set of memory cells is modified to decrease voltage threshold drift in the RESET state.
    Type: Grant
    Filed: October 14, 2021
    Date of Patent: July 18, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Sandeepan Dasgupta, Sanjay Rangan, Koushik Banerjee, Nevil Gajera, Mase J. Taub, Kiran Pangal
  • Publication number: 20220068385
    Abstract: Methods, systems, and devices for a modified write voltage for memory devices are described. In an example, the memory device may determine a first set of memory cells to be switched from a first logic state (e.g., a SET state) to a second logic state (e.g., a RESET state) based on a received write command. The memory device may perform a read operation to determine a subset of the first set of memory cells (e.g., a second set of memory cells) having a conductance threshold satisfying a criteria based on a predicted drift of the memory cells. The memory device may apply a RESET pulse to each of the memory cells within the first set of memory cells, where the RESET pulse applied to the second set of memory cells is modified to decrease voltage threshold drift in the RESET state.
    Type: Application
    Filed: October 14, 2021
    Publication date: March 3, 2022
    Inventors: Sandeepan Dasgupta, Sanjay Rangan, Koushik Banerjee, Nevil Gajera, Mase J. Taub, Kiran Pangal
  • Patent number: 11170853
    Abstract: Methods, systems, and devices for a modified write voltage for memory devices are described. In an example, the memory device may determine a first set of memory cells to be switched from a first logic state (e.g., a SET state) to a second logic state (e.g., a RESET state) based on a received write command. The memory device may perform a read operation to determine a subset of the first set of memory cells (e.g., a second set of memory cells) having a conductance threshold satisfying a criteria based on a predicted drift of the memory cells. The memory device may apply a RESET pulse to each of the memory cells within the first set of memory cells, where the RESET pulse applied to the second set of memory cells is modified to decrease voltage threshold drift in the RESET state.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: November 9, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Sandeepan Dasgupta, Sanjay Rangan, Koushik Banerjee, Nevil Gajera, Mase J. Taub, Kiran Pangal
  • Publication number: 20210280244
    Abstract: Methods, systems, and devices for a modified write voltage for memory devices are described. In an example, the memory device may determine a first set of memory cells to be switched from a first logic state (e.g., a SET state) to a second logic state (e.g., a RESET state) based on a received write command. The memory device may perform a read operation to determine a subset of the first set of memory cells (e.g., a second set of memory cells) having a conductance threshold satisfying a criteria based on a predicted drift of the memory cells. The memory device may apply a RESET pulse to each of the memory cells within the first set of memory cells, where the RESET pulse applied to the second set of memory cells is modified to decrease voltage threshold drift in the RESET state.
    Type: Application
    Filed: March 4, 2020
    Publication date: September 9, 2021
    Inventors: Sandeepan Dasgupta, Sanjay Rangan, Koushik Banerjee, Nevil Gajera, Mase J. Taub, Kiran Pangal
  • Patent number: 9761675
    Abstract: The present disclosure relates to resistive field structures that provide improved electric field profiles when used with a semiconductor device. In particular, the resistive field structures provide a uniform electric field profile, thereby enhancing breakdown voltage and improving reliability. In example, the structure is a field cage that is configured to be resistive, in which the potential changes significantly over the distance of the cage. In another example, the structure is a resistive field plate. Using these resistive field structures, the characteristics of the electric field profile can be independently modulated from the physical parameters of the semiconductor device. Additional methods and architectures are described herein.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: September 12, 2017
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Matthew Marinella, Sandeepan DasGupta, Robert Kaplar, Albert G. Baca