Patents by Inventor Hyun-Su WOO

Hyun-Su WOO 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).

  • Semiconductor memory device having memory strings coupled to bit lines and operating method thereof
    Patent number: 9899093
    Abstract: There are provided a semiconductor memory device and an operating method thereof. A semiconductor memory device includes a memory cell array including a plurality of memory blocks, a peripheral circuit for performing a program operation on a selected memory block among the plurality of memory blocks, and a control logic for controlling the peripheral circuit to perform the program operation. The control logic controls the peripheral circuit to perform a verify operation during the program operation and then apply a pre-drain select line voltage to drain select lines of the selected memory block and unselected memory blocks.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: February 20, 2018
    Assignee: SK Hynix Inc.
    Inventors: Jong Won Lee, Jin Su Park, Hyun Su Woo
  • SEMICONDUCTOR MEMORY DEVICE AND OPERATING METHOD THEREOF
    Publication number: 20170337973
    Abstract: There are provided a semiconductor memory device and an operating method thereof. A semiconductor memory device includes a memory cell array including a plurality of memory blocks, a peripheral circuit for performing a program operation on a selected memory block among the plurality of memory blocks, and a control logic for controlling the peripheral circuit to perform the program operation. The control logic controls the peripheral circuit to perform a verify operation during the program operation and then apply a pre-drain select line voltage to drain select lines of the selected memory block and unselected memory blocks.
    Type: Application
    Filed: October 11, 2016
    Publication date: November 23, 2017
    Inventors: Jong Won LEE, Jin Su PARK, Hyun Su WOO
  • Crosslinked speek cation exchange membrane having improved chemical stability by radiation and method of preparing the same
    Patent number: 9790339
    Abstract: Provided is a method of preparing a crosslinked sulfonated poly(ether ether ketone) (SPEEK) cation exchange membrane including: preparing a crosslinker mixture of a first crosslinker containing two or more vinyl oxy groups and a second crosslinker containing three or more vinyl groups; preparing a mother liquor containing the crosslinker mixture, a SPEEK polymer substituted with sodium, and a solvent; and casting the mother liquor and then irradiating radiation thereon.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: October 17, 2017
    Assignee: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Junhwa Shin, Joon Yong Sohn, Ju-Myung Song, Sun-Young Lee, Hyun-Su Woo
  • CROSSLINKED SPEEK CATION EXCHANGE MEMBRANE HAVING IMPROVED CHEMICAL STABILITY BY RADIATION AND METHOD OF PREPARING THE SAME
    Publication number: 20150133570
    Abstract: Provided is a method of preparing a crosslinked sulfonated poly(ether ether ketone) (SPEEK) cation exchange membrane including: preparing a crosslinker mixture of a first crosslinker containing two or more vinyl oxy groups and a second crosslinker containing three or more vinyl groups; preparing a mother liquor containing the crosslinker mixture, a SPEEK polymer substituted with sodium, and a solvent; and casting the mother liquor and then irradiating radiation thereon.
    Type: Application
    Filed: May 28, 2014
    Publication date: May 14, 2015
    Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Junhwa SHIN, Joon Yong SOHN, Ju-Myung SONG, Sun-Young LEE, Hyun-Su WOO