Patents by Inventor Dong-Hun Kwak

Dong-Hun Kwak 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: 20230113235
    Abstract: The present disclosure relates to an electronic device. A memory device includes a plurality of memory cells coupled to a plurality of word lines, a voltage generator generating program-related voltages to be applied to the plurality of word lines, an address decoder transferring the program-related voltages to the plurality of word lines, and an operation controller controlling the voltage generator and the address decoder to apply a program voltage to a selected word line among the plurality of word lines, a second pass voltage to adjacent word lines neighboring the selected word line, a first pass voltage to remaining word lines except for the selected word line and the adjacent word lines, and to apply a ground voltage to the selected word line and the first pass voltage to the adjacent word lines during a first period.
    Type: Application
    Filed: March 24, 2022
    Publication date: April 13, 2023
    Inventors: Chan Hui JEONG, Dong Hun KWAK, Se Chun PARK
  • Publication number: 20230112851
    Abstract: A semiconductor memory device includes a plurality of memory blocks and a contact region. Each of the plurality of memory blocks includes a plurality of memory cells. The contact region is formed between the plurality of memory blocks. The semiconductor memory device uses a first memory block that is not adjacent to the contact region and a second memory block adjacent to the contact region among the plurality of memory blocks differently.
    Type: Application
    Filed: March 7, 2022
    Publication date: April 13, 2023
    Applicant: SK hynix Inc.
    Inventors: Suk Hwan CHOI, Dong Hun KWAK
  • Publication number: 20230071618
    Abstract: A memory device includes: a plurality of memory cells; a peripheral circuit for performing a program operation including a plurality of loops each including a program voltage apply step and a verify step by using a plurality of verify voltages; and a program operation controller for controlling the peripheral circuit to perform the program operation. The program operation controller includes: a verify voltage controller for changing a verify voltage interval as an interval between the plurality of verify voltages from a predetermined target loop among the plurality of loops; and a bit line voltage controller to control bit line voltages applied to bit lines connected to first memory cells and second memory cells in the program voltage apply steps of an (n+1)th loop and an (n+2)th loop, based on a verify result in the verify step of an nth loop among the plurality of loops.
    Type: Application
    Filed: February 21, 2022
    Publication date: March 9, 2023
    Applicant: SK hynix Inc.
    Inventors: Hyun Seob SHIN, Dong Hun KWAK
  • Publication number: 20230062706
    Abstract: A memory device and method of operation includes memory cells and a program operation performer configured to perform a verify operation and a program voltage apply operation, wherein the verify operation verifies whether threshold voltages of the memory cells have reached threshold voltages corresponding to a target program state using a first verify voltage, a second verify voltage higher than the first verify voltage and a third verify voltage higher than the second verify voltage, and the program voltage apply operation applies a program voltage to a word line. The memory device and method of operation also includes a program operation controller configured to control the program operation performer such that, during the program voltage apply operation, a precharge voltage is first applied to a second bit line coupled to a second memory cell before a precharge voltage is applied to a first bit line.
    Type: Application
    Filed: January 31, 2022
    Publication date: March 2, 2023
    Applicant: SK hynix Inc.
    Inventors: Yeong Jo MUN, Dong Hun KWAK
  • Patent number: 11594286
    Abstract: A method of operating a non-volatile memory device includes performing a first sensing operation on the non-volatile memory device during a first sensing time including a first section, a second section, and a third section. The performing of the first sensing operation includes applying a first voltage level, which is variable according to a first target voltage level, to a selected word line in the first section, applying a second voltage level, which is different from the first voltage level, to the selected word line in the second section, and applying the first target voltage level, which is different from the second voltage level, to the selected word line in the third section. The first voltage level becomes greater as the first target voltage level becomes greater.
    Type: Grant
    Filed: February 4, 2022
    Date of Patent: February 28, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-Hun Kwak
  • Publication number: 20230039585
    Abstract: An electronic device, and more particularly, a page buffer is provided. The page buffer includes a sensing node configured to sense a potential of a bit line coupled to a memory cell, a precharging circuit coupled to the sensing node and configured to precharge a potential of the sensing node to a first voltage during an evaluation operation on the memory cell, a discharging circuit coupled to the sensing node and configured to discharge the potential of the sensing node from the first voltage to a second voltage, and a latch circuit coupled to the discharging circuit and configured to store therein data sensed from the memory cell based on a result of comparing the potential of the sensing node with a reference voltage after the potential of the sensing node is discharged to the second voltage and a predetermined period elapses.
    Type: Application
    Filed: January 13, 2022
    Publication date: February 9, 2023
    Inventors: Yeong Jo MUN, Dong Hun KWAK
  • Publication number: 20230036205
    Abstract: A nonvolatile memory device includes a memory cell array and a row decoder. The memory cell array includes a plurality of mats. A first cell string of first mat is connected to a plurality of first word-lines, a first bit-line and a first string selection line. A second cell string of second mat is connected to a plurality of second word-lines, a second bit-line and a second string selection line. Each of the first and second cell strings includes a ground selection transistor, memory cells, and a string selection transistor coupled in series. The row decoder applies a first voltage to a third word-line among the plurality of first and second word-lines for a first period of time in a single mat mode and to apply a second voltage to the third word-line for a second period of time longer than the first period of time in a multi-mat mode.
    Type: Application
    Filed: October 1, 2022
    Publication date: February 2, 2023
    Inventors: Hee-Woong KANG, Dong-Hun KWAK, Jun-Ho SEO, Hee-Won LEE
  • Publication number: 20230032133
    Abstract: A memory device includes a memory structure including at least one non-volatile memory cell capable of storing multi-bit data, and a control device configured to perform a program verification after a first program pulse is applied to the at least one non-volatile memory cell, determine a program mode for the at least one non-volatile memory cell based on a result of the program verification, and change a level of a pass voltage, applied to another non-volatile memory cell coupled to the at least one non-volatile memory cell, from a first level to a second level which is higher than the first level, or a setup time for changing a potential of a bit line coupled to the at least one non-volatile memory cell, according to the program mode.
    Type: Application
    Filed: December 10, 2021
    Publication date: February 2, 2023
    Inventors: Tae Hun PARK, Dong Hun KWAK
  • Publication number: 20230019716
    Abstract: A method of operating a non-volatile memory device includes performing a first sensing operation on the non-volatile memory device during a first sensing time including a first section, a second section, and a third section. The performing of the first sensing operation includes applying a first voltage level, which is variable according to a first target voltage level, to a selected word line in the first section, applying a second voltage level, which is different from the first voltage level, to the selected word line in the second section, and applying the first target voltage level, which is different from the second voltage level, to the selected word line in the third section. The first voltage level becomes greater as the first target voltage level becomes greater.
    Type: Application
    Filed: September 21, 2022
    Publication date: January 19, 2023
    Inventor: Dong-Hun Kwak
  • Publication number: 20230015493
    Abstract: Provided herein may be a memory device and a method of operating the same. The memory device may include a plurality of memory cells coupled between a common source line and a bit line, a peripheral circuit configured to perform a plurality of program loops, each including a program voltage application operation of applying a program voltage to a selected memory cell and a verify operation of verifying a program state of the selected memory cell, and a control logic configured to control, at the program voltage application operation, the peripheral circuit to apply a precharge voltage to the common source line and change at least one of a magnitude of the precharge voltage and a time during which the precharge voltage is applied, depending on a magnitude of the program voltage.
    Type: Application
    Filed: June 1, 2022
    Publication date: January 19, 2023
    Inventors: Jae Yeop JUNG, Dong Hun Kwak, Hyung Jin Choi
  • Publication number: 20220415419
    Abstract: An operating method of a memory device, comprises: a program operation of applying a program voltage to a selected word line to program selected memory cells connected to the selected word line, a first verification operation of applying a first verification voltage to the selected word line and applying a first verification pass voltage to unselected word lines to verify a first program state of the selected memory cells, and a second verification operation of applying a second verification voltage to the selected word line and applying a second verification pass voltage to the unselected word lines to verify a second program state higher than the first program state.
    Type: Application
    Filed: November 19, 2021
    Publication date: December 29, 2022
    Inventors: Hyun Seob SHIN, Dong Hun KWAK, Sung Hyun HWANG
  • Publication number: 20220415401
    Abstract: A memory device includes a controller that performs a program verification after a first program pulse is applied to the at least one non-volatile memory cell. The first program pulse is applied during a data program operation and the data program operation includes applying program pulses to program multi-bit data to the at least one non-volatile memory cell. The controller also determines a program mode for the at least one non-volatile memory cell based on a result of the program verification, and changes at least one of a level of a first control voltage based on the program mode. The first control voltage is applied to a drain select line coupled to the at least one non-volatile memory cell.
    Type: Application
    Filed: December 10, 2021
    Publication date: December 29, 2022
    Inventors: Tae Hun PARK, Dong Hun KWAK, Hyung Jin CHOI
  • Patent number: 11535854
    Abstract: The present invention relates to a novel microorganism capable of metabolizing various carbon sources at high rates. A novel microorganism according to the present invention was observed to grow at a very high rate in a minimal medium/nutrient medium, etc., compared to microorganisms such as Escherichia coli, and shows resistance at a high initial sugar/salt concentrations as well as being able to produce lycopene and 2,3-butanediol through genetic manipulation. Therefore, the novel microorganism can be used in various production fields of high value-added compounds using microorganisms.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: December 27, 2022
    Assignees: POSTECH ACADEMY-INDUSTRY FOUNDATION, SEOUL NATIONAL UNIVERSITY R & DB FOUNDATION
    Inventors: Gyoo Yeol Jung, Dong Hun Kwak, Sang Woo Seo, Hyun Gyu Lim
  • Patent number: 11482288
    Abstract: A nonvolatile memory device is provided. A nonvolatile memory device comprises a word line, a bit line, a memory cell array including a first memory cell at an intersection region between the word line and the bit line, a word line voltage generating circuitry configured to generate a program voltage, the program voltage to be provided to the word line, a row decoder circuitry configured to receive the program voltage from the word line voltage generating circuitry and configured to provide the program voltage to the word line, a verification circuitry configured to generate a verification signal in response to verifying a success or a failure of programming of the first memory cell, and a control circuitry configured to apply the program voltage to the first memory cell in response to the verification signal, and configured to cut off the program voltage in response to the verification signal.
    Type: Grant
    Filed: April 28, 2021
    Date of Patent: October 25, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seul Bee Lee, Dong Hun Kwak, Jong-Chul Park
  • Patent number: 11462260
    Abstract: A nonvolatile memory device includes a memory cell array and a row decoder. The memory cell array includes a plurality of mats. A first cell string of first mat is connected to a plurality of first word-lines, a first bit-line and a first string selection line. A second cell string of second mat is connected to a plurality of second word-lines, a second bit-line and a second string selection line. Each of the first and second cell strings includes a ground selection transistor, memory cells, and a string selection transistor coupled in series. The row decoder applies a first voltage to a third word-line among the plurality of first and second word-lines for a first period of time in a single mat mode and to apply a second voltage to the third word-line for a second period of time longer than the first period of time in a multi-mat mode.
    Type: Grant
    Filed: May 14, 2021
    Date of Patent: October 4, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hee-Woong Kang, Dong-Hun Kwak, Jun-Ho Seo, Hee-Won Lee
  • Publication number: 20220157388
    Abstract: A method of operating a non-volatile memory device includes performing a first sensing operation on the non-volatile memory device during a first sensing time including a first section, a second section, and a third section. The performing of the first sensing operation includes applying a first voltage level, which is variable according to a first target voltage level, to a selected word line in the first section, applying a second voltage level, which is different from the first voltage level, to the selected word line in the second section, and applying the first target voltage level, which is different from the second voltage level, to the selected word line in the third section. The first voltage level becomes greater as the first target voltage level becomes greater.
    Type: Application
    Filed: February 4, 2022
    Publication date: May 19, 2022
    Inventor: Dong-Hun Kwak
  • Patent number: 11276472
    Abstract: A method of operating a non-volatile memory device includes performing a first sensing operation on the non-volatile memory device during a first sensing time including a first section, a second section, and a third section. The performing of the first sensing operation includes applying a first voltage level, which is variable according to a first target voltage level, to a selected word line in the first section, applying a second voltage level, which is different from the first voltage level, to the selected word line in the second section, and applying the first target voltage level, which is different from the second voltage level, to the selected word line in the third section. The first voltage level becomes greater as the first target voltage level becomes greater.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: March 15, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-Hun Kwak
  • Patent number: 11217314
    Abstract: A method of operating a non-volatile memory device includes performing a first sensing operation on the non-volatile memory device during a first sensing time including a first section, a second section, and a third section. The performing of the first sensing operation includes applying a first voltage level, which is variable according to a first target voltage level, to a selected word line in the first section, applying a second voltage level, which is different from the first voltage level, to the selected word line in the second section, and applying the first target voltage level, which is different from the second voltage level, to the selected word line in the third section. The first voltage level becomes greater as the first target voltage level becomes greater.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: January 4, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-Hun Kwak
  • Patent number: 11164637
    Abstract: A nonvolatile memory device includes a memory cell region, a peripheral circuit region, a memory block in the memory cell region, and a control circuit in the peripheral circuit region. The memory cell region includes a first metal pad. The peripheral circuit region includes a second metal pad and is vertically connected to the memory cell region by the first metal pad and the second metal pad. The memory block includes a plurality of memory cells disposed in a vertical direction. The control circuit applies an erase voltage to an erase source terminal of the memory block, and applies a first voltage to a first selection line among a plurality of selection lines in the memory block. The first voltage is higher than the erase voltage. The first selection line is disposed closest to the erase source terminal among the plurality of selection lines and is used for selecting the memory block as an erase target block.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: November 2, 2021
    Inventors: Sang-Wan Nam, Dong-Hun Kwak, Chi-Weon Yoon
  • Publication number: 20210272617
    Abstract: A nonvolatile memory device includes a memory cell array and a row decoder. The memory cell array includes a plurality of mats. A first cell string of first mat is connected to a plurality of first word-lines, a first bit-line and a first string selection line. A second cell string of second mat is connected to a plurality of second word-lines, a second bit-line and a second string selection line. Each of the first and second cell strings includes a ground selection transistor, memory cells, and a string selection transistor coupled in series. The row decoder applies a first voltage to a third word-line among the plurality of first and second word-lines for a first period of time in a single mat mode and to apply a second voltage to the third word-line for a second period of time longer than the first period of time in a multi-mat mode.
    Type: Application
    Filed: May 14, 2021
    Publication date: September 2, 2021
    Inventors: Hee-Woong KANG, Dong-Hun KWAK, Jun-Ho SEO, Hee-Won LEE