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: 11956997Abstract: 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: GrantFiled: August 23, 2021Date of Patent: April 9, 2024Assignee: 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: 20220064488Abstract: 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: ApplicationFiled: November 4, 2019Publication date: March 3, 2022Applicant: KCTECH CO., LTD.Inventors: Nak Hyun CHOI, Jung Yoon KIM, Hae Won YANG, Soo Wan CHOI
-
Publication number: 20220064489Abstract: 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: ApplicationFiled: July 3, 2019Publication date: March 3, 2022Applicant: KCTECH CO., LTD.Inventors: Soo Wan CHOI, Jung Yoon KIM, Nak Hyun CHOI, Hae Won YANG
-
Publication number: 20210380842Abstract: 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: ApplicationFiled: May 29, 2019Publication date: December 9, 2021Applicant: KCTECH CO., LTD.Inventors: Kwang Soo PARK, Jun Ha HWANG, Soo Wan CHOI, Nak Hyun CHOI
-
Publication number: 20210179891Abstract: 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: ApplicationFiled: December 15, 2020Publication date: June 17, 2021Applicant: KCTECH CO., LTD.Inventors: Kwang Soo PARK, Jun Ha HWANG, Jung Yoon KIM, Nak Hyun CHOI
-
Patent number: 10428240Abstract: 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: GrantFiled: January 23, 2015Date of Patent: October 1, 2019Assignee: 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: 20190211245Abstract: 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: ApplicationFiled: June 21, 2017Publication date: July 11, 2019Applicant: KCTECH CO., LTD.Inventors: Nak Hyun CHOI, Kwang Soo PARK, Jung Yoon KIM, Jun Ha HWANG
-
Patent number: 10047041Abstract: 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: GrantFiled: July 14, 2015Date of Patent: August 14, 2018Assignee: CJ HEALTHCARE CORPORATIONInventors: 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: 20170247320Abstract: 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: ApplicationFiled: July 14, 2015Publication date: August 31, 2017Applicant: CJ Healthcare CorporationInventors: 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: 9629844Abstract: 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: GrantFiled: May 8, 2014Date of Patent: April 25, 2017Assignee: CJ HEALTHCARE CORPORATIONInventors: Myung Jin Shin, Hong Chul Jin, Young Joon Park, Nak Hyun Choi, Ha Yong Choi
-
Publication number: 20170051180Abstract: 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: ApplicationFiled: January 23, 2015Publication date: February 23, 2017Applicant: 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: 20160120867Abstract: 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: ApplicationFiled: May 8, 2014Publication date: May 5, 2016Applicant: CJ Healthcare CorporationInventors: Myung Jin SHIN, Hong Chul JIN, Young Joon PARK, Nak Hyun CHOI, Ha Yong CHOI
-
Patent number: 9265832Abstract: 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: GrantFiled: November 29, 2013Date of Patent: February 23, 2016Assignee: CJ HEALTHCARE CORPORATIONInventors: Young Joon Park, Myung Jin Shin, Hong Chul Jin, Ha Yong Choi, Nak Hyun Choi
-
Publication number: 20150297724Abstract: 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: ApplicationFiled: November 29, 2013Publication date: October 22, 2015Inventors: Young Joon Park, Myung Jin Shin, Hong Chul Jin, Ha Yong Choi, Nak Hyun Choi