Patents by Inventor Foroozan S. Koushan

Foroozan S. Koushan 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: 11735267
    Abstract: A system includes a memory device and a processing device, operatively coupled with the memory device. The processing device is configured to perform operations that include determining a verify reference voltage associated with a logic state of a memory cell of the memory device, the verify reference voltage defining a target voltage level of a threshold voltage associated with the logic state; determining an amount of voltage compensation based on a thermal profile associated with a heat to be applied to the memory device, the thermal profile comprising a temperature associated with the heat and a period of time the heat is to be applied to the memory device; and updating the verify reference voltage using the amount of voltage compensation for an expected shift in the threshold voltage of the memory cell after the heat is applied to the memory device.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: August 22, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Ji-Hye Shin, Foroozan S. Koushan, Tomoko Iwasaki, Jayasree Nayar
  • Patent number: 11646083
    Abstract: Control logic in a memory device initiates an erase operation on a memory array and causes an erase voltage signal to be applied to a source terminal of a string of memory cells in a data block of the memory array during the erase operation. The control logic further causes a first voltage signal to be applied to a first select line of the data block and a second voltage signal to be applied to a second select line of the data block, wherein the first select line is coupled to a first device in the string of memory cells and the second select line is coupled to a second device in the string of memory cells, and wherein the first voltage signal and the second voltage signal both have a common first voltage offset with respect to the erase voltage signal during a first stage of the erase operation.
    Type: Grant
    Filed: July 19, 2022
    Date of Patent: May 9, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Foroozan S. Koushan, Shinji Sato
  • Publication number: 20220351782
    Abstract: Control logic in a memory device initiates an erase operation on a memory array and causes an erase voltage signal to be applied to a source terminal of a string of memory cells in a data block of the memory array during the erase operation. The control logic further causes a first voltage signal to be applied to a first select line of the data block and a second voltage signal to be applied to a second select line of the data block, wherein the first select line is coupled to a first device in the string of memory cells and the second select line is coupled to a second device in the string of memory cells, and wherein the first voltage signal and the second voltage signal both have a common first voltage offset with respect to the erase voltage signal during a first stage of the erase operation.
    Type: Application
    Filed: July 19, 2022
    Publication date: November 3, 2022
    Inventors: Foroozan S. Koushan, Shinji Sato
  • Patent number: 11423990
    Abstract: Control logic in a memory device initiates an erase operation on a memory array and causes an erase voltage signal to be applied to a source terminal of a string of memory cells in a data block of the memory array during the erase operation. The control logic further causes a first voltage signal to be applied to a first select line of the data block and a second voltage signal to be applied to a second select line of the data block, wherein the first select line is coupled to a first device in the string of memory cells and the second select line is coupled to a second device in the string of memory cells, and wherein the first voltage signal and the second voltage signal both have a common first voltage offset with respect to the erase voltage signal during a first stage of the erase operation.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: August 23, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Foroozan S. Koushan, Shinji Sato
  • Publication number: 20220051724
    Abstract: Control logic in a memory device initiates an erase operation on a memory array and causes an erase voltage signal to be applied to a source terminal of a string of memory cells in a data block of the memory array during the erase operation. The control logic further causes a first voltage signal to be applied to a first word line of the data block and a second voltage signal to be applied to a second word line of the data block, wherein the first word line is coupled to a first device in the string of memory cells and the second word line is coupled to a second device in the string of memory cells, and wherein the first voltage signal and the second voltage signal both have a common first voltage offset with respect to the erase voltage signal during a first stage of the erase operation.
    Type: Application
    Filed: August 11, 2020
    Publication date: February 17, 2022
    Inventors: Foroozan S. Koushan, Shinji Sato
  • Publication number: 20210343346
    Abstract: A system includes a memory device and a processing device, operatively coupled with the memory device. The processing device is configured to perform operations that include determining a verify reference voltage associated with a logic state of a memory cell of the memory device, the verify reference voltage defining a target voltage level of a threshold voltage associated with the logic state; determining an amount of voltage compensation based on a thermal profile associated with a heat to be applied to the memory device, the thermal profile comprising a temperature associated with the heat and a period of time the heat is to be applied to the memory device; and updating the verify reference voltage using the amount of voltage compensation for an expected shift in the threshold voltage of the memory cell after the heat is applied to the memory device.
    Type: Application
    Filed: July 12, 2021
    Publication date: November 4, 2021
    Inventors: Ji-Hye Shin, Foroozan S. Koushan, Tomoko Iwasaki, Jayasree Nayar
  • Patent number: 11069412
    Abstract: A logic state to be stored at a memory cell of a memory device is determined, where the logic state is to be represented by a threshold voltage stored at the memory cell. A verify reference voltage associated with the logic state is determined. The verify reference voltage defines a target voltage level of the threshold voltage associated with the logic state. The verify reference voltage is updated using an amount of compensation for an expected shift in the threshold voltage of the memory cell after heat is applied to the memory device. Before the heat is applied to the memory device, a plurality of sets of multiple programming pulses to the memory cell is applied until a threshold condition is satisfied. The threshold condition is associated with a relative magnitude of the threshold voltage of the memory cell to the updated verify reference voltage.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: July 20, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Ji-Hye Shin, Foroozan S. Koushan, Tomoko Iwasaki, Jayasree Nayar
  • Publication number: 20210183448
    Abstract: A logic state to be stored at a memory cell of a memory device is determined, where the logic state is to be represented by a threshold voltage stored at the memory cell. A verify reference voltage associated with the logic state is determined. The verify reference voltage defines a target voltage level of the threshold voltage associated with the logic state. The verify reference voltage is updated using an amount of compensation for an expected shift in the threshold voltage of the memory cell after heat is applied to the memory device. Before the heat is applied to the memory device, a plurality of sets of multiple programming pulses to the memory cell is applied until a threshold condition is satisfied. The threshold condition is associated with a relative magnitude of the threshold voltage of the memory cell to the updated verify reference voltage.
    Type: Application
    Filed: December 13, 2019
    Publication date: June 17, 2021
    Inventors: Ji-Hye Shin, Foroozan S. Koushan, Tomoko Iwasaki, Jayasree Nayar