Patents by Inventor Hee Joo LEE

Hee Joo 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).

  • Patent number: 12512147
    Abstract: A memory device comprising: a memory cell array, and a controller configured to connect, in a first interval equal to or longer than a bit line setup interval, each of first and second bit lines, which are connected to cells respectively having first and second program states, to a node of a first permission voltage, connect, in the first interval, a third bit line, which is connected to a cell having a program prohibition state, to a node of a prohibition voltage, maintain, in a second interval that is equal to or shorter than a program pulse application interval, the respective connections of the first bit line and the third bit line, and disconnect, in the second interval, the second bit line from the node of the first permission voltage to apply the second bit line with a second permission voltage.
    Type: Grant
    Filed: July 7, 2023
    Date of Patent: December 30, 2025
    Assignee: SK hynix Inc.
    Inventors: Soo Yeol Chai, Hee Joo Lee
  • Publication number: 20250372688
    Abstract: A laser welding apparatus for a secondary battery is provided, with the laser welding apparatus being configured such that a fixing force for a current collector of a secondary battery is improved. The laser welding apparatus reduces the likelihood of human errors and defects in a process of welding the current collector of the secondary battery.
    Type: Application
    Filed: November 12, 2024
    Publication date: December 4, 2025
    Inventors: Jung Yeol NOH, Deok Jo PARK, Seung Ik CHO, Seon Young KANG, Hee Joo LEE
  • Publication number: 20240290377
    Abstract: A memory device comprising: a memory cell array, and a controller configured to connect, in a first interval equal to or longer than a bit line setup interval, each of first and second bit lines, which are connected to cells respectively having first and second program states, to a node of a first permission voltage, connect, in the first interval, a third bit line, which is connected to a cell having a program prohibition state, to a node of a prohibition voltage, maintain, in a second interval that is equal to or shorter than a program pulse application interval, the respective connections of the first bit line and the third bit line, and disconnect, in the second interval, the second bit line from the node of the first permission voltage to apply the second bit line with a second permission voltage.
    Type: Application
    Filed: July 7, 2023
    Publication date: August 29, 2024
    Inventors: Soo Yeol CHAI, Hee Joo LEE
  • Patent number: 11532369
    Abstract: A memory device and a method of operating the same are provided. The memory device may include a peripheral circuit configured to perform a plurality of program loops and program a page selected from among the plurality of pages, wherein the peripheral circuit may count a number of memory cells whose threshold voltages have increased up to a first target voltage, among a part of memory cells included in the selected page, and may perform a current sensing check operation of determining whether a verify operation performed in a previous program loop has passed or failed, and a control logic circuit configured to control the peripheral circuit so that the current sensing check operation is performed when the number of memory cells whose threshold voltages have increased up to the first target voltage, is equal to or greater than a reference number of memory cells.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: December 20, 2022
    Assignee: SK hynix Inc.
    Inventors: Hyung Jin Choi, Hee Joo Lee
  • Patent number: 11462274
    Abstract: A semiconductor memory device, and a method of operation, include: a memory block coupled with a plurality of word lines and a plurality of bit lines; a peripheral circuit configured to perform a program operation and a read operation on the memory block; and control logic configured to control the peripheral circuit such that a word line overdrive period overlaps with a bit line overdrive period in a bit line precharge operation during at least one of the program operation and the read operation.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: October 4, 2022
    Assignee: SK hynix Inc.
    Inventor: Hee Joo Lee
  • Publication number: 20220101933
    Abstract: A memory device and a method of operating the same are provided. The memory device may include a peripheral circuit configured to perform a plurality of program loops and program a page selected from among the plurality of pages, wherein the peripheral circuit may count a number of memory cells whose threshold voltages have increased up to a first target voltage, among a part of memory cells included in the selected page, and may perform a current sensing check operation of determining whether a verify operation performed in a previous program loop has passed or failed, and a control logic circuit configured to control the peripheral circuit so that the current sensing check operation is performed when the number of memory cells whose threshold voltages have increased up to the first target voltage, is equal to or greater than a reference number of memory cells.
    Type: Application
    Filed: March 30, 2021
    Publication date: March 31, 2022
    Applicant: SK hynix Inc.
    Inventors: Hyung Jin CHOI, Hee Joo LEE
  • Patent number: 11205487
    Abstract: A memory device includes drain select lines, source select lines, a plurality of word lines arranged between the drain select lines and the source select lines, and a peripheral circuit configured to perform a program operation on selected memory cells connected to a selected word line among the plurality of word lines. The peripheral circuit includes a voltage generator configured to generate a voltage for initializing a channel of a plurality of memory cells respectively connected to the plurality of word lines in a program phase among a plurality of phases included in the program operation.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: December 21, 2021
    Assignee: SK hynix Inc.
    Inventor: Hee Joo Lee
  • Publication number: 20210210146
    Abstract: An electronic device includes drain select lines, source select lines, a plurality of word lines arranged between the drain select lines and the source select lines, and a peripheral circuit configured to perform a program operation on selected memory cells connected to a selected word line among the plurality of word lines. The peripheral circuit includes a voltage generator configured to generate a voltage for initializing a channel of a plurality of memory cells respectively connected to the plurality of word lines in a program phase among a plurality of phases included in the program operation.
    Type: Application
    Filed: June 30, 2020
    Publication date: July 8, 2021
    Applicant: SK hynix Inc.
    Inventor: Hee Joo LEE
  • Publication number: 20210202010
    Abstract: A semiconductor memory device, and a method of operation, include: a memory block coupled with a plurality of word lines and a plurality of bit lines; a peripheral circuit configured to perform a program operation and a read operation on the memory block; and control logic configured to control the peripheral circuit such that a word line overdrive period overlaps with a bit line overdrive period in a bit line precharge operation during at least one of the program operation and the read operation.
    Type: Application
    Filed: June 30, 2020
    Publication date: July 1, 2021
    Applicant: SK hynix Inc.
    Inventor: Hee Joo LEE