Patents by Inventor Nak Hyun Choi

Nak Hyun Choi 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: 11956997
    Abstract: A display device according to an exemplary embodiment includes: a substrate including a display area and a transmission area; a metal blocking layer disposed in the display area of the substrate; an inorganic insulating layer disposed on the metal blocking film; a transistor disposed on the inorganic insulating layer; an emission layer connected to the transistor; and a light blocking layer and a color filter disposed on the emission layer of the display area, wherein the edge of the light blocking layer is protruded toward the transmission area more than the edge of the metal blocking layer.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: April 9, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Se Wan Son, Nak Cho Choi, Moo Soon Ko, Dong Hyun Son, Sang Hoon Oh, Jin Goo Jung, Kyung Hyun Choi, Hae-Yeon Lee, Seong Min Cho
  • Publication number: 20220064488
    Abstract: The present invention relates to a polishing slurry composition. A polishing slurry composition according to an embodiment of the present disclosure comprises: a nonionic polymer having at least one amide bond; a selectivity control agent; and abrasive particles.
    Type: Application
    Filed: November 4, 2019
    Publication date: March 3, 2022
    Applicant: KCTECH CO., LTD.
    Inventors: Nak Hyun CHOI, Jung Yoon KIM, Hae Won YANG, Soo Wan CHOI
  • Publication number: 20220064489
    Abstract: The present invention relates to a polishing slurry composition. A polishing slurry composition according to an embodiment of the present disclosure comprises a polishing solution containing polishing particles; and an additive solution containing a non-ionic polymer and a polishing selectivity controller. The polishing slurry composition of the present disclosure has a high polishing rate for silicon oxide films and polysilicon films, leaves no residues after shallow trench isolation (STI) polishing of semiconductor devices, and can reduce the amount of silicon oxide film dishing and decrease scratches.
    Type: Application
    Filed: July 3, 2019
    Publication date: March 3, 2022
    Applicant: KCTECH CO., LTD.
    Inventors: Soo Wan CHOI, Jung Yoon KIM, Nak Hyun CHOI, Hae Won YANG
  • Publication number: 20210380842
    Abstract: The present disclosure relates to a polishing slurry composition and a method of producing the same. The polishing slurry composition according to one embodiment of the present disclosure includes: abrasive particles dispersed so as to have positively-charged particle surfaces; a first dispersant including a nonionic linear polymer; and a second dispersant including an anionic coiling polymer, wherein the polishing slurry composition satisfies the following Expressions 1 and 2: [Expression 1] 4?log(milling energy) <5; and [Expression 2] 20% ?Primary particle size reduction rate (%) <35%.
    Type: Application
    Filed: May 29, 2019
    Publication date: December 9, 2021
    Applicant: KCTECH CO., LTD.
    Inventors: Kwang Soo PARK, Jun Ha HWANG, Soo Wan CHOI, Nak Hyun CHOI
  • Publication number: 20210179891
    Abstract: A polishing slurry composition for a shallow trench isolation (STI) process is provided. The polishing slurry composition includes abrasive particles, a nonionic polymer, and a polar amino acid.
    Type: Application
    Filed: December 15, 2020
    Publication date: June 17, 2021
    Applicant: KCTECH CO., LTD.
    Inventors: Kwang Soo PARK, Jun Ha HWANG, Jung Yoon KIM, Nak Hyun CHOI
  • Patent number: 10428240
    Abstract: The present invention relates to a method for preparing a slurry composition and a slurry composition prepared thereby, and has advantages of reducing scratches and residual particles, which are considered to be one of the biggest factors contributing to the decline in yield due to macroparticles and aggregated particles, while maintaining a high polishing rate, in a semiconductor CMP process. Furthermore, the present invention can achieve excellent results in the application to various patterns required in the ultra-large scale integration semiconductor process, the wafer non-uniformity (WIWNU) exhibiting a polishing rate, polishing selectivity, and polishing uniformity, which meet the needs, and the micro-scratch minimization.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: October 1, 2019
    Assignee: KCTECH CO., LTD.
    Inventors: Jang Kuk Kwon, Chan Un Jeon, Ki Hwa Jung, Jung Yoon Kim, Nak Hyun Choi, Seong Pyo Lee, Bo Hyeok Choi
  • Publication number: 20190211245
    Abstract: The present invention relates to surface-modified colloidal ceria abrasive particles, a preparation method therefor, and a polishing slurry composition containing the same. According to one embodiment of the present invention, the surface-modified colloidal ceria abrasive particles comprise: colloidal ceria abrasive particles; and cerium atoms and hydroxyl groups (—OH) formed on the surface of the colloidal ceria abrasive particles.
    Type: Application
    Filed: June 21, 2017
    Publication date: July 11, 2019
    Applicant: KCTECH CO., LTD.
    Inventors: Nak Hyun CHOI, Kwang Soo PARK, Jung Yoon KIM, Jun Ha HWANG
  • Patent number: 10047041
    Abstract: The present invention relates to a novel amino-phenyl-sulfonyl-acetate derivative or a pharmaceutically acceptable salt thereof; and a pharmaceutical composition for preventing or treating diabetes comprising the same as an active ingredient.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: August 14, 2018
    Assignee: CJ HEALTHCARE CORPORATION
    Inventors: Jae Ho Yoo, Seung Chan Kim, Soo Yeon Jung, Hyoung Rok Bak, Young Mee Chung, Sung Jun Kim, Sook Kyung Park, Seog Beom Song, Shin-Young Ryu, Mi Young Yoon, Dong Hyun Ko, Sun Young Park, Chi Hye Park, Nak Hyun Choi
  • Publication number: 20170247320
    Abstract: The present invention relates to a novel amino-phenyl-sulfonyl-acetate derivative or a pharmaceutically acceptable salt thereof; and a pharmaceutical composition for preventing or treating diabetes comprising the same as an active ingredient.
    Type: Application
    Filed: July 14, 2015
    Publication date: August 31, 2017
    Applicant: CJ Healthcare Corporation
    Inventors: Jae Ho Yoo, Seung Chan Kim, Soo Yeon Jung, Hyoung Rok Bak, Young Mee Chung, Sung Jun Kim, Sook Kyung Park, Seog Beom Song, Shin-Young Ryu, Mi Young Yoon, Dong Hyun Ko, Sun Young Park, Chi Hye Park, Nak Hyun Choi
  • Patent number: 9629844
    Abstract: The present invention relates to a stabilized pemetrexed formulation, and more specifically, to a stabilized pemetrexed formulation comprising acetylcysteine as an antioxidant and sodium citrate as a buffering agent. Additionally, the present invention relates to a pemetrexed formulation filled in a sealed container, comprising pemetrexed or a pharmaceutically acceptable salt thereof as an active ingredient, wherein the oxygen gas content within the headspace of the container is 3 v/v % or less.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: April 25, 2017
    Assignee: CJ HEALTHCARE CORPORATION
    Inventors: Myung Jin Shin, Hong Chul Jin, Young Joon Park, Nak Hyun Choi, Ha Yong Choi
  • Publication number: 20170051180
    Abstract: The present invention relates to a method for preparing a slurry composition and a slurry composition prepared thereby, and has advantages of reducing scratches and residual particles, which are considered to be one of the biggest factors contributing to the decline in yield due to macroparticles and aggregated particles, while maintaining a high polishing rate, in a semiconductor CMP process. Furthermore, the present invention can achieve excellent results in the application to various patterns required in the ultra-large scale integration semiconductor process, the wafer non-uniformity (WIWNU) exhibiting a polishing rate, polishing selectivity, and polishing uniformity, which meet the needs, and the micro-scratch minimization.
    Type: Application
    Filed: January 23, 2015
    Publication date: February 23, 2017
    Applicant: K.C. Tech Co., Ltd.
    Inventors: Jang Kuk KWON, Chan Un JEON, Ki Hwa JUNG, Jung Yoon KIM, Nak Hyun CHOI, Seong Pyo LEE, Bo Hyeok CHOI
  • Publication number: 20160120867
    Abstract: The present invention relates to a stabilized pemetrexed formulation, and more specifically, to a stabilized pemetrexed formulation comprising acetylcysteine as an antioxidant and sodium citrate as a buffering agent. Additionally, the present invention relates to a pemetrexed formulation filled in a sealed container, comprising pemetrexed or a pharmaceutically acceptable salt thereof as an active ingredient, wherein the oxygen gas content within the headspace of the container is 3 v/v % or less.
    Type: Application
    Filed: May 8, 2014
    Publication date: May 5, 2016
    Applicant: CJ Healthcare Corporation
    Inventors: Myung Jin SHIN, Hong Chul JIN, Young Joon PARK, Nak Hyun CHOI, Ha Yong CHOI
  • Patent number: 9265832
    Abstract: The present invention relates to a stabilized pemetrexed formulation, and more particularly to a stabilized pemetrexed formulation comprising acetylcysteine as antioxidant and a citrate salt as buffer.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: February 23, 2016
    Assignee: CJ HEALTHCARE CORPORATION
    Inventors: Young Joon Park, Myung Jin Shin, Hong Chul Jin, Ha Yong Choi, Nak Hyun Choi
  • Publication number: 20150297724
    Abstract: The present invention relates to a stabilized pemetrexed formulation, and more particularly to a stabilized pemetrexed formulation comprising acetylcysteine as antioxidant and a citrate salt as buffer.
    Type: Application
    Filed: November 29, 2013
    Publication date: October 22, 2015
    Inventors: Young Joon Park, Myung Jin Shin, Hong Chul Jin, Ha Yong Choi, Nak Hyun Choi