Patents by Inventor Ji-Sang LEE

Ji-Sang LEE 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: 20190252027
    Abstract: A non-volatile memory device including: a page buffer configured to latch a plurality of page data constituting one bit page of a plurality of bit pages, and a control logic configured to compare results of a plurality of read operations performed in response to a high-priority read signal set to select one of a plurality of read signals included in the high-priority read signal set as a high-priority read signal, and determine a low-priority read signal corresponding to the high-priority read signal, wherein the high-priority read signal set is for reading high-priority page data, and the low-priority read signal is for reading low-priority page data.
    Type: Application
    Filed: September 25, 2018
    Publication date: August 15, 2019
    Inventors: Dong Jin Shin, Ji Su Kim, Dae Seok Byeon, Ji Sang Lee, Jun Jin Kong, Eun Chu Oh
  • Patent number: 10325658
    Abstract: A non-volatile memory device includes: a memory cell array including a plurality of memory cells connected to a plurality of word lines and a plurality of bit lines, a row decoder configured to selectively control the plurality of word lines, a page buffer including a plurality of latches corresponding to the plurality of bit lines, respectively, and a control circuit configured to control the non-volatile memory device to enter a suspend state after terminating a verify operation of a program loop of a program operation of the plurality of memory cells in response to a suspend request being generated during an execution operation of the program loop.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: June 18, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ji-Sang Lee
  • Patent number: 10304549
    Abstract: A nonvolatile memory device may include a memory cell array and a control logic. The memory cell array has a plurality of memory cells connected to a plurality of word lines. The control logic controls, in a transition process from a verification step to a bit line setup step for a program operation of the plurality of memory cells, an application of a recovery voltage to a word line among the plurality of word lines. The recovery voltage applied to the word line is different from a recovery voltage applied to other word lines.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: May 28, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ji-Sang Lee
  • Publication number: 20190115081
    Abstract: An operating method of a non-volatile memory device including a plurality of memory cells respectively connected to a plurality of word lines is provided. The operating method includes applying an erase detect voltage to a selected word line of the plurality of word lines to perform an erase detect operation on memory cells connected to the selected word line in response to a program command, applying a program voltage to the selected word line after the erase detect operation, and counting a number of undererased cells of the memory cells on which the erase detect operation has been performed.
    Type: Application
    Filed: August 22, 2018
    Publication date: April 18, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Ji-sang LEE
  • Patent number: 10224109
    Abstract: A memory device, comprising: a memory cell array including a plurality of NAND strings, each NAND string including a plurality of memory cells respectively connected to a plurality of word lines vertically stacked on a substrate; and a control logic configured to generate a pre-programming control signal for memory cells of a first NAND string of the NAND strings such that, before erasing the memory cells of the first NAND string, pre-programming voltages applied to the word lines coupled to the corresponding memory cells of the first NAND string vary based on an operating characteristic of the corresponding memory cells.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: March 5, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoon Kim, Dong-chan Kim, Ji-sang Lee
  • Patent number: 10210936
    Abstract: A nonvolatile memory device includes a memory cell array including a plurality of memory cells, an address decoder configured to be connected to the memory cells through a plurality of word lines and to provide select or unselect read voltages to the word lines, and a control logic configured to control the address decoder to perform a plurality of read sequences in a continuous read mode and to adjust a word line setup start point in at least one of the read sequences to be different than a word line setup start point in at least one of the other read sequences, wherein the word line setup start point is a time at which the select or unselect read voltages begin to be provided to the word lines.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: February 19, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun Jun Yoon, Ji-Sang Lee
  • Patent number: 10102910
    Abstract: A nonvolatile memory includes a memory cell array, a row decoder circuit, and a page buffer circuit. The row decoder circuit applies a turn-on voltage to string selection lines, which are connected to string selection transistors of a selected memory block, at a first precharge operation in response to a write command received from an external device. The page buffer circuit applies, in response to the write command, a first voltage to bit lines, which are connected to the string selection transistors, through a first precharge circuit at the first precharge operation regardless of loaded data and applies the first voltage and a second voltage to the bit lines through a second precharge circuit at a second precharge operation based on the loaded data. During the first precharge operation, write data is loaded onto the page buffer circuit.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: October 16, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-Sang Lee, Donghun Kwak, Daeseok Byeon, Chiweon Yoon
  • Patent number: 10056152
    Abstract: In a method of reading data in a nonvolatile memory device including a plurality of memory cells arranged at intersections of a plurality of word-lines and a plurality of bit-lines, a read request on a first word-line of the plurality of word-lines is received, a read operation is performed on a second word-line adjacent to the first word-line and a read operation is performed on the first word-line based on data read from memory cells of the second word-line. The read operation on the first word-line is performed by adjusting a level of recover read voltage applied to the first word-line during the read operation of the first word-line based on at least one of a program state of the data read from memory cells of the second word-line and an operating parameter of the nonvolatile memory device.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: August 21, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Wook-Ghee Hahn, Ji-Sang Lee
  • Publication number: 20180204621
    Abstract: A memory device, comprising: a memory cell array including a plurality of NAND strings, each NAND string including a plurality of memory cells respectively connected to a plurality of word lines vertically stacked on a substrate; and a control logic configured to generate a pre-programming control signal for memory cells of a first NAND string of the NAND strings such that, before erasing the memory cells of the first NAND string, pre-programming voltages applied to the word lines coupled to the corresponding memory cells of the first NAND string vary based on an operating characteristic of the corresponding memory cells.
    Type: Application
    Filed: March 12, 2018
    Publication date: July 19, 2018
    Inventors: Yoon Kim, Dong-chan Kim, Ji-sang Lee
  • Publication number: 20180197610
    Abstract: A non-volatile memory device includes: a memory cell array including a plurality of memory cells connected to a plurality of word lines and a plurality of bit lines, a row decoder configured to selectively control the plurality of word lines, a page buffer including a plurality of latches corresponding to the plurality of bit lines, respectively, and a control circuit configured to control the non-volatile memory device to enter a suspend state after terminating a verify operation of a program loop of a program operation of the plurality of memory cells in response to a suspend request being generated during an execution operation of the program loop.
    Type: Application
    Filed: July 27, 2017
    Publication date: July 12, 2018
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Ji-Sang LEE
  • Publication number: 20180190363
    Abstract: A nonvolatile memory device may include a memory cell array and a control logic. The memory cell array has a plurality of memory cells connected to a plurality of word lines. The control logic controls, in a transition process from a verification step to a bit line setup step for a program operation of the plurality of memory cells, an application of a recovery voltage to a word line among the plurality of word lines. The recovery voltage applied to the word line is different from a recovery voltage applied to other word lines.
    Type: Application
    Filed: June 30, 2017
    Publication date: July 5, 2018
    Inventor: JI-SANG LEE
  • Patent number: 9991007
    Abstract: A nonvolatile memory device with a memory cell array including a plurality of memory cells coupled to first through M-th wordlines and first through N-th bitlines (M>2, N>2), and a page buffer circuit including first through N-th page buffers that are coupled to the first through N-th bitlines, respectively, and generate first through N-th output data, respectively. A K-th page buffer includes first through L-th latches which generate read data by sampling a voltage of a K-th output line, which is discharged through a K-th bitline, at different sampling timings after a read voltage is applied to a P-th wordline (K?N, L>1, P?M). The K-th page buffer outputs the first output data if an error in the read data of the first latch is correctable.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: June 5, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ji-Sang Lee, Sang-Soo Park, Dong-Kyo Shim
  • Publication number: 20180151237
    Abstract: An operation method of a nonvolatile memory device for programming memory cells connected to a selected word line, the method including: performing a program operation; suspending the program operation after performing a first portion of the program operation; and resuming the program operation to perform a second portion of the program operation, wherein the program operation is resumed within a reference time after the program operation is suspended.
    Type: Application
    Filed: November 29, 2017
    Publication date: May 31, 2018
    Inventors: Ji-Sang LEE, Ji-Ho CHO, Byung-Soo KIM, Dong-Jin SHIN
  • Publication number: 20180090216
    Abstract: In a method of reading data in a nonvolatile memory device including a plurality of memory cells arranged at intersections of a plurality of word-lines and a plurality of bit-lines, a read request on a first word-line of the plurality of word-lines is received, a read operation is performed on a second word-line adjacent to the first word-line and a read operation is performed on the first word-line based on data read from memory cells of the second word-line. The read operation on the first word-line is performed by adjusting a level of recover read voltage applied to the first word-line during the read operation of the first word-line based on at least one of a program state of the data read from memory cells of the second word-line and an operating parameter of the nonvolatile memory device.
    Type: Application
    Filed: April 21, 2017
    Publication date: March 29, 2018
    Inventors: Wook-Ghee HAHN, Ji-Sang LEE
  • Patent number: 9916900
    Abstract: A memory device, comprising: a memory cell array including a plurality of NAND strings, each NAND string including a plurality of memory cells respectively connected to a plurality of word lines vertically stacked on a substrate; and a control logic configured to generate a pre-programming control signal for memory cells of a first NAND string of the NAND strings such that, before erasing the memory cells of the first NAND string, pre-programming voltages applied to the word lines coupled to the corresponding memory cells of the first NAND string vary based on an operating characteristic of the corresponding memory cells.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: March 13, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yoon Kim, Dong-chan Kim, Ji-sang Lee
  • Publication number: 20180068728
    Abstract: A nonvolatile memory includes a memory cell array, a row decoder circuit, and a page buffer circuit. The row decoder circuit applies a turn-on voltage to string selection lines, which are connected to string selection transistors of a selected memory block, at a first precharge operation in response to a write command received from an external device. The page buffer circuit applies, in response to the write command, a first voltage to bit lines, which are connected to the string selection transistors, through a first precharge circuit at the first precharge operation regardless of loaded data and applies the first voltage and a second voltage to the bit lines through a second precharge circuit at a second precharge operation based on the loaded data. During the first precharge operation, write data is loaded onto the page buffer circuit.
    Type: Application
    Filed: November 8, 2017
    Publication date: March 8, 2018
    Inventors: JI-SANG LEE, DONGHUN KWAK, DAESEOK BYEON, CHIWEON YOON
  • Patent number: 9905301
    Abstract: A nonvolatile memory device includes a memory cell, a bit line, a page buffer, and a control logic. The page buffer is connected to the memory cell through the bit line and the page buffer is configured to precharge the bit line to perform a desired operation. The desired operation may be one of a read operation and a verify operation. The control logic is configured to control bit line development time differently according to a temperature after precharging the bit line during the desired operation. The control logic is configured to determine the bit line development time according to a period of a reference clock signal that includes a different frequency depending on the temperature and/or a temperature compensation pulse signal including a pulse width that varies based on the temperature.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: February 27, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Pil Seon Yoo, Ji-Sang Lee, Gyosoo Choo
  • Patent number: 9842654
    Abstract: A nonvolatile memory includes a memory cell array, a row decoder circuit, and a page buffer circuit. The row decoder circuit applies a turn-on voltage to string selection lines, which are connected to string selection transistors of a selected memory block, at a first precharge operation in response to a write command received from an external device. The page buffer circuit applies, in response to the write command, a first voltage to bit lines, which are connected to the string selection transistors, through a first precharge circuit at the first precharge operation regardless of loaded data and applies the first voltage and a second voltage to the bit lines through a second precharge circuit at a second precharge operation based on the loaded data. During the first precharge operation, write data is loaded onto the page buffer circuit.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: December 12, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-Sang Lee, Donghun Kwak, Daeseok Byeon, Chiweon Yoon
  • Publication number: 20170200502
    Abstract: A nonvolatile memory device includes a memory cell array including a plurality of memory cells, an address decoder configured to be connected to the memory cells through a plurality of word lines and to provide select or unselect read voltages to the word lines, and a control logic configured to control the address decoder to perform a plurality of read sequences in a continuous read mode and to adjust a word line setup start point in at least one of the read sequences to be different than a word line setup start point in at least one of the other read sequences, wherein the word line setup start point is a time at which the select or unselect read voltages begin to be provided to the word lines.
    Type: Application
    Filed: January 4, 2017
    Publication date: July 13, 2017
    Inventors: HYUN JUN YOON, JI-SANG LEE
  • Publication number: 20170133096
    Abstract: A nonvolatile memory device includes a memory cell, a bit line, a page buffer, and a control logic. The page buffer is connected to the memory cell through the bit line and the page buffer is configured to precharge the bit line to perform a desired operation. The desired operation may be one of a read operation and a verify operation. The control logic is configured to control bit line development time differently according to a temperature after precharging the bit line during the desired operation. The control logic is configured to determine the bit line development time according to a period of a reference clock signal that includes a different frequency depending on the temperature and/or a temperature compensation pulse signal including a pulse width that varies based on the temperature.
    Type: Application
    Filed: September 23, 2016
    Publication date: May 11, 2017
    Inventors: Pil Seon Yoo, Ji-Sang Lee, Gyosoo Choo