Patents by Inventor Chi-Yeon Kim

Chi-Yeon Kim 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: 20240128653
    Abstract: Disclosed is a meta-structure. The meta-structure includes a lower electrode, a lower insulating layer on the lower electrode, a lower metal oxide layer on the lower insulating layer, a metal layer on the lower metal oxide layer, an upper metal oxide layer on the metal layer, an upper insulating layer on the upper metal oxide layer, and antenna electrodes on the upper insulating layer.
    Type: Application
    Filed: June 28, 2023
    Publication date: April 18, 2024
    Inventors: Yong Hae KIM, Chi-Sun HWANG, Joo Yeon KIM, Jaehyun MOON, Jong-Heon YANG, Kyunghee CHOI, Ji Hun CHOI
  • Publication number: 20240084259
    Abstract: The present invention relates to stem cell-derived mature cardiomyocytes and a cardiovascular disease model using same and, more specifically, to differentiation into mature ventricular cardiomyocytes by culturing stem cells in a medium containing FGF4 and ascorbic acid, and use of the differentiated mature ventricular cardiomyocytes as a cardiovascular disease cell model. The mature ventricular cardiomyocytes, obtained by culturing stem cells in a medium containing FGF4 and ascorbic acid and inducing the differentiation thereof, and cardiovascular disease cell model using same according to the present invention are very useful for screening for cardiovascular disease therapeutic agents and evaluation of the toxicity of new drugs.
    Type: Application
    Filed: November 13, 2019
    Publication date: March 14, 2024
    Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Do-Sun LIM, Seung Cheol CHOI, Hyung Joon JOO, Jong-Ho KIM, Chi-Yeon PARK, Yongdoo PARK
  • Patent number: 11667524
    Abstract: Disclose is a method for fabricating a semiconductor device. The method includes: forming a groove such as by etching one side surface of a first substrate; attaching a second substrate including a silicon layer on the etched surface of the first substrate formed with the hollow groove; etching the second substrate so as to leave substantially only the silicon layer; forming a thin film structure on the surface of silicon layers of the second substrate; and separating the second substrate formed with the thin film structure from the first substrate. For example, the groove structure may be formed in the lower portion of the device in the process of fabricating the semiconductor device to facilitate the final device separation.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: June 6, 2023
    Assignee: Hyundai Kefico Corporation
    Inventors: Jun Hwan Choi, Chi Yeon Kim
  • Publication number: 20210188628
    Abstract: Disclose is a method for fabricating a semiconductor device. The method includes: forming a groove such as by etching one side surface of a first substrate; attaching a second substrate including a silicon layer on the etched surface of the first substrate formed with the hollow groove; etching the second substrate so as to leave substantially only the silicon layer; forming a thin film structure on the surface of silicon layers of the second substrate; and separating the second substrate formed with the thin film structure from the first substrate. For example, the groove structure may be formed in the lower portion of the device in the process of fabricating the semiconductor device to facilitate the final device separation.
    Type: Application
    Filed: December 22, 2020
    Publication date: June 24, 2021
    Inventors: Jun Hwan Choi, Chi Yeon Kim
  • Patent number: 10876916
    Abstract: A sensor element that has high measurement precision by providing a resistance-change length ratio corresponding to a direction-specific extension length is provided. The sensor element includes an element body disposed in a sensor body to measure a temperature and a pressure and having a diaphragm deformed based on the temperature or the pressure. Additionally, the sensor element includes pressure-measuring resistors including a second resistor portion and a fourth resistor portion disposed along a diametric direction with respect to a center of an upper surface of the diaphragm and in an extension section on the upper surface of the diaphragm and a first resistor portion and including a third resistor portion disposed outside the second resistor portion or the fourth resistor portion in a compression section on the upper surface of the diaphragm to eliminate a resistance change caused by a pressure-specific temperature change.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: December 29, 2020
    Assignee: HYUNDAI KEFICO CORPORATION
    Inventor: Chi Yeon Kim
  • Publication number: 20180180502
    Abstract: A sensor element that has high measurement precision by providing a resistance-change length ratio corresponding to a direction-specific extension length is provided. The sensor element includes an element body disposed in a sensor body to measure a temperature and a pressure and having a diaphragm deformed based on the temperature or the pressure. Additionally, the sensor element includes pressure-measuring resistors including a second resistor portion and a fourth resistor portion disposed along a diametric direction with respect to a center of an upper surface of the diaphragm and in an extension section on the upper surface of the diaphragm and a first resistor portion and including a third resistor portion disposed outside the second resistor portion or the fourth resistor portion in a compression section on the upper surface of the diaphragm to eliminate a resistance change caused by a pressure-specific temperature change.
    Type: Application
    Filed: December 19, 2017
    Publication date: June 28, 2018
    Inventor: Chi Yeon Kim
  • Publication number: 20170120550
    Abstract: The present invention relates to a hot plate structure of a press molding device, and a continuous molding method using the same. The continuous molding method continuously performs primary and secondary overlapping molding operations on the basis of a length unit which is smaller than a set length unit (cutting width) and accordingly cancels out a boundary part, thereby being capable of improving the thickness difference of the boundary part and thus enabling uniform physical properties to be obtained.
    Type: Application
    Filed: September 5, 2014
    Publication date: May 4, 2017
    Inventors: Chi Yeon KIM, Gun Ho KIM
  • Patent number: 8963091
    Abstract: A signal detecting circuit of an infrared sensor includes: a cell array in which bolometers sensing infrared rays and outputting signal currents are arranged in an N×M format; a level generator that outputs a plurality of bias voltages corresponding to a plurality of bias levels; N resistor non-uniformity correcting circuits that are located in a column direction of the cell array and supply different bias voltages to each of the bolometers; M resistor non-uniformity correcting circuits that are located in a row direction of the cell array and supply different bias voltages to each of the bolometers; a control unit that sets a bias voltage level of each resistor non-uniformity correcting circuit to correct the resistor non-uniformity of the cell array; and N integrators that integrate the signal currents output from the cell array.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: February 24, 2015
    Assignee: Agency for Defense Development
    Inventors: Chi-Yeon Kim, Kang-Il Lee, Sun-Ho Kim, Hyun-Jin Choi, Nam-Hwan Kim, Sang-Gu Kang
  • Publication number: 20140231651
    Abstract: A signal detecting circuit of an infrared sensor includes: a cell array in which bolometers sensing infrared rays and outputting signal currents are arranged in an N×M format; a level generator that outputs a plurality of bias voltages corresponding to a plurality of bias levels; N resistor non-uniformity correcting circuits that are located in a column direction of the cell array and supply different bias voltages to each of the bolometers; M resistor non-uniformity correcting circuits that are located in a row direction of the cell array and supply different bias voltages to each of the bolometers; a control unit that sets a bias voltage level of each resistor non-uniformity correcting circuit to correct the resistor non-uniformity of the cell array; and N integrators that integrate the signal currents output from the cell array.
    Type: Application
    Filed: October 30, 2012
    Publication date: August 21, 2014
    Inventors: Chi-Yeon Kim, Kang-Il Lee, Sun-Ho Kim, Hyun-Jin Choi, Nam-Hwan Kim, Sang-Gu Kang