Patents by Inventor Yingda Dong

Yingda Dong 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: 20230268003
    Abstract: A memory device comprising a memory array and control logic operatively coupled with the memory array. The control logic is to: detect a program operation directed at a selected wordline of multiple wordlines of the memory array; determine, during an initial phase of the program operation, whether a program voltage being applied to the selected wordline satisfies a threshold program voltage; add, in response to the program voltage not satisfying the threshold program voltage, a base offset voltage to an initial pass voltage to generate a higher pass voltage, the initial pass voltage being a percentage of an initial program voltage; and cause the higher pass voltage to be applied to a remainder of the multiple wordlines other than the selected wordline.
    Type: Application
    Filed: January 31, 2023
    Publication date: August 24, 2023
    Inventors: Vinh Quang Diep, Jeffrey Ming-Hung Tsai, Ching-Huang Lu, Yingda Dong
  • Patent number: 11688471
    Abstract: Control logic in a memory device initiates a program operation on the memory device, the program operation comprising a program phase, a program recovery phase, a program verify phase, and a program verify recovery phase. The control logic further causes a negative voltage signal to be applied to a first plurality of word lines of a data bock of the memory device during the program verify recovery phase of the program operation, wherein each of the first plurality of word lines is coupled to a corresponding memory cell of a first plurality of memory cells in a string of memory cells in the data block, the first plurality of word lines comprising a selected word line associated with the program operation and one or more data word lines adjacent to the selected word line.
    Type: Grant
    Filed: March 8, 2022
    Date of Patent: June 27, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Hong-Yan Chen, Yingda Dong
  • Patent number: 11688476
    Abstract: A device might include a common source, a three-dimensional array of memory cells, a plurality of access lines, and a controller. The three-dimensional array of memory cells might include a plurality of NAND strings. Each NAND string might be selectively connected between a corresponding data line and the common source. Each access line of the plurality of access lines might be connected to a control gate of a respective memory cell of each NAND string of the plurality of NAND strings. The controller might be configured to access the three-dimensional array of memory cells to implement a source-side seeding operation.
    Type: Grant
    Filed: January 5, 2022
    Date of Patent: June 27, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Jun Xu, Yingda Dong
  • Patent number: 11688474
    Abstract: A memory device includes a memory array of memory cells. A page buffer is to apply, to a bit line, a first voltage or a second voltage that is higher than the first voltage during a program verify operation. Control logic operatively coupled with the page buffer is to perform operations including: causing a plurality of memory cells to be programmed with a first program pulse; measuring a threshold voltage for the memory cells; forming a threshold voltage distribution from the measured threshold voltages; classifying, based on the threshold voltage distribution, a first subset of the memory cells as having a faster quick charge loss than that of a second subset of the memory cells; and causing, in response to the classifying, the page buffer to apply the second voltage to the bit line during a program verify operation performed on any of the first subset of memory cells.
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: June 27, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Violante Moschiano, Yingda Dong
  • Publication number: 20230197164
    Abstract: Control logic can perform operations including obtaining, for each dummy wordline of a set of dummy wordlines, a respective set of step-up voltage parameters, wherein each set of step-up voltage parameters includes a step ratio corresponding to the dummy wordline, and causing a bias voltage with respect to each dummy wordline of the set of dummy wordlines to be ramped to a respective program inhibit bias voltage in accordance with the respective set of step-up voltage parameters. Additionally or alternatively, control logic can perform memory operations including causing a bias voltage with respect to each dummy wordline to be ramped to a power supply voltage during a seed first sub-phase of a pre-programming phase, and maintaining the bias voltage of the first dummy wordline at a first dummy wordline seed voltage throughout a bitline setting sub-phase of the pre-programming phase.
    Type: Application
    Filed: December 7, 2022
    Publication date: June 22, 2023
    Inventors: Vinh Q. Diep, Yingda Dong, Ching-Huang Lu
  • Publication number: 20230195328
    Abstract: Control logic in a memory device executes a programming operation to program a memory cell of a set of memory cells to a programming level. A first erase sub-operation is executed to erase the memory cell to a first threshold voltage level, the first erase sub-operation including applying, to the memory cell, a first erase pulse having a first erase voltage level. A second erase sub-operation is executed to erase the memory cell to a second threshold voltage level, the second erase sub-operation including applying, to the memory cell, a second erase pulse having a second erase voltage level, where the first erase voltage level of the first erase pulse is lower than the second erase voltage level of the second erase pulse.
    Type: Application
    Filed: December 16, 2022
    Publication date: June 22, 2023
    Inventors: Ching-Huang Lu, Yingda Dong, Sampath K. Ratnam
  • Patent number: 11670372
    Abstract: Control logic in a memory device initiates, subsequent to a program verify phase of a program operation, a new program operation on the memory array, the new program operation comprising a pre-boosting phase occurring prior to a program phase. The control logic causing one or more positive pre-boosting voltages to be applied to corresponding subsets of a plurality of word lines of a block of the memory array during the pre-boosting phase and causes the one or more positive pre-boosting voltages to be ramped down to a ground voltage during the pre-boosting phase in a designated order based on a location of the corresponding subsets of the plurality of word lines to which the one or more positive pre-boosting voltages were applied.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: June 6, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Hong-Yan Chen, Yingda Dong
  • Publication number: 20230044240
    Abstract: Processing logic in a memory device initiates a program operation on a memory array, the program operation comprising a program phase and a program verify phase. The processing logic further causes a negative voltage signal to be applied to a first selected word line of a block of the memory array during the program verify phase of the program operation, wherein the first selected word line is coupled to a corresponding first memory cell of a first plurality of memory cells in a string of memory cells in the block, wherein the first selected word line is associated with the program operation.
    Type: Application
    Filed: October 20, 2022
    Publication date: February 9, 2023
    Inventors: Ching-Huang Lu, Vinh Q. Diep, Zhengyi Zhang, Yingda Dong
  • Publication number: 20230031362
    Abstract: Some embodiments include apparatuses and methods of forming the apparatuses. One of the apparatuses includes a memory cell included in a memory cell string; the memory cell including charge storage structure and channel structure separated from the charge storage structure by a dielectric structure; a first control gate associated with the memory cell and located on a first side of the charge storage structure and a first side of the channel structure; and a second control gate associated with the memory cell and electrically separated from the first control gate, the second control gate located on a second side of the charge storage structure and a second side of the channel structure.
    Type: Application
    Filed: July 28, 2021
    Publication date: February 2, 2023
    Inventors: Haitao Liu, Kamal M. Karda, Albert Fayrushin, Yingda Dong
  • Publication number: 20230022858
    Abstract: A memory device includes a memory array of memory cells and control logic, operatively coupled with the memory array. The control logic is to perform operations, which include causing the memory cells to be programmed with an initial voltage distribution representing multiple logical states; causing the memory cells to be programmed with a subsequent voltage distribution representing a subset of the multiple logical states at a higher voltage than that of the initial voltage distribution, wherein the subset of the multiple logical states is compacted above a program verify voltage level for the subsequent voltage distribution; and causing a first program verify operation of the subsequent voltage distribution to be performed on the memory cells to verify one or more voltage levels of the subsequent voltage distribution.
    Type: Application
    Filed: October 5, 2022
    Publication date: January 26, 2023
    Inventors: Kalyan Chakravarthy Kavalipurapu, George Matamis, Yingda Dong, Chang H. Siau
  • Patent number: 11508449
    Abstract: Processing logic in a memory device initiates a program operation on a memory array, the program operation comprising a program phase and a program verify phase. The processing logic further causes a negative voltage signal to be applied to a first selected word line of a block of the memory array during the program verify phase of the program operation, wherein the first selected word line is coupled to a corresponding first memory cell of a first plurality of memory cells in a string of memory cells in the block, wherein the first selected word line is associated with the program operation.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: November 22, 2022
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Ching-Huang Lu, Vinh Q. Diep, Zhengyi Zhang, Yingda Dong
  • Patent number: 11488677
    Abstract: A memory device includes a memory array of memory cells and control logic, operatively coupled with the memory array. The control logic is to perform operations, which include causing the memory cells to be programmed with an initial voltage distribution representing multiple logical states; causing the memory cells to be programmed with a subsequent voltage distribution representing a subset of the multiple logical states at a higher voltage than that of the initial voltage distribution, wherein the subset of the multiple logical states is compacted above a program verify voltage level for the subsequent voltage distribution; and causing a first program verify operation of the subsequent voltage distribution to be performed on the memory cells to verify one or more voltage levels of the subsequent voltage distribution.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: November 1, 2022
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Kalyan Chakravarthy Kavalipurapu, George Matamis, Yingda Dong, Chang H. Siau
  • Publication number: 20220336028
    Abstract: A memory device includes a memory array of memory cells. A page buffer is to apply, to a bit line, a first voltage or a second voltage that is higher than the first voltage during a program verify operation. Control logic operatively coupled with the page buffer is to perform operations including: causing a plurality of memory cells to be programmed with a first program pulse; measuring a threshold voltage for the memory cells; forming a threshold voltage distribution from the measured threshold voltages; classifying, based on the threshold voltage distribution, a first subset of the memory cells as having a faster quick charge loss than that of a second subset of the memory cells; and causing, in response to the classifying, the page buffer to apply the second voltage to the bit line during a program verify operation performed on any of the first subset of memory cells.
    Type: Application
    Filed: April 19, 2021
    Publication date: October 20, 2022
    Inventors: Violante Moschiano, Yingda Dong
  • Publication number: 20220215890
    Abstract: Control logic in a memory device initiates a program operation on the memory device, and causes a program voltage to be applied to a selected wordline of the memory array during a program phase of the program operation. The control logic further causes a select gate drain coupled with a string of memory cells in the memory array to deactivate during a recovery phase after applying the program voltage, wherein the string of memory cells comprises a plurality of memory cells, and wherein each memory cell of the plurality of memory cells is coupled to a corresponding wordline of a plurality of wordlines in the memory array.
    Type: Application
    Filed: March 23, 2022
    Publication date: July 7, 2022
    Inventors: Hong-Yan Chen, Yingda Dong
  • Patent number: 11380709
    Abstract: A memory element is provided that includes a portion of a bit line plug, a portion of a source line plug, a portion of a word line, a portion of a vertical semiconductor pillar disposed between the bit line plug, the source line plug and adjacent the word line, and a gate oxide including a ferroelectric material disposed between the vertical semiconductor pillar and the word line.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: July 5, 2022
    Assignee: SanDisk Technologies LLC
    Inventors: Yingda Dong, James Kai, Christopher J. Petti
  • Publication number: 20220199175
    Abstract: Processing logic in a memory device initiates a program operation on a memory array, the program operation comprising a program phase and a program verify phase. The processing logic further causes a negative voltage signal to be applied to a first selected word line of a block of the memory array during the program verify phase of the program operation, wherein the first selected word line is coupled to a corresponding first memory cell of a first plurality of memory cells in a string of memory cells in the block, wherein the first selected word line is associated with the program operation.
    Type: Application
    Filed: March 2, 2021
    Publication date: June 23, 2022
    Inventors: Ching-Huang Lu, Vinh Q. Diep, Zhengyi Zhang, Yingda Dong
  • Publication number: 20220189565
    Abstract: Control logic in a memory device initiates a program operation on the memory device, the program operation comprising a program phase, a program recovery phase, a program verify phase, and a program verify recovery phase. The control logic further causes a negative voltage signal to be applied to a first plurality of word lines of a data bock of the memory device during the program verify recovery phase of the program operation, wherein each of the first plurality of word lines is coupled to a corresponding memory cell of a first plurality of memory cells in a string of memory cells in the data block, the first plurality of word lines comprising a selected word line associated with the program operation and one or more data word lines adjacent to the selected word line.
    Type: Application
    Filed: March 8, 2022
    Publication date: June 16, 2022
    Inventors: Hong-Yan Chen, Yingda Dong
  • Publication number: 20220189555
    Abstract: Control logic in a memory device initiates a program operation on a memory array, the program operation comprising a seeding phase. During the seeding phase, the control logic causes a seeding voltage to be applied to a string of memory cells in a data block of the memory array during the seeding phase of the program operation and causes a first positive voltage to be applied to a first plurality of word lines of the data block during the seeding phase, wherein each of the first plurality of word lines is coupled to a corresponding memory cell of a first plurality of memory cells in the string of memory cells, the first plurality of word lines comprising a selected word line associated with the program operation.
    Type: Application
    Filed: December 16, 2020
    Publication date: June 16, 2022
    Inventors: Vinh Q. Diep, Ching-Huang Lu, Yingda Dong
  • Publication number: 20220189570
    Abstract: A memory device includes a memory array of memory cells and control logic, operatively coupled with the memory array. The control logic is to perform operations, which include causing the memory cells to be programmed with an initial voltage distribution representing multiple logical states; causing the memory cells to be programmed with a subsequent voltage distribution representing a subset of the multiple logical states at a higher voltage than that of the initial voltage distribution, wherein the subset of the multiple logical states is compacted above a program verify voltage level for the subsequent voltage distribution; and causing a first program verify operation of the subsequent voltage distribution to be performed on the memory cells to verify one or more voltage levels of the subsequent voltage distribution.
    Type: Application
    Filed: December 10, 2020
    Publication date: June 16, 2022
    Inventors: Kalyan Chakravarthy Kavalipurapu, George Matamis, Yingda Dong, Chang H. Siau
  • Publication number: 20220149068
    Abstract: An electronic device comprises a stack of alternating dielectric materials and conductive materials, a pillar region extending vertically through the stack, an oxide material within the pillar region and laterally adjacent to the dielectric materials and the conductive materials of the stack, and a storage node laterally adjacent to the oxide material and within the pillar region. A charge confinement region of the storage node is in horizontal alignment with the conductive materials of the stack. A height of the charge confinement region in a vertical direction is less than a height of a respective, laterally adjacent conductive material of the stack in the vertical direction. Related methods and systems are also disclosed.
    Type: Application
    Filed: November 9, 2020
    Publication date: May 12, 2022
    Inventors: Yifen Liu, Yan Song, Albert Fayrushin, Naiming Liu, Yingda Dong, George Matamis