Patents by Inventor Won Chegal

Won Chegal 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: 11719624
    Abstract: The present invention relates to a liquid immersion micro-channel measurement device and measurement method which are based on trapezoidal incident structure prism incident-type silicon, and according to one embodiment of the present invention, the liquid immersion micro-channel measurement device based on trapezoidal incident structure prism incident-type silicon comprises: a micro-channel structure including a support and at least one micro-channel, which is formed on the support and has a sample detection layer to which a first bioadhesive material for detecting a first sample is fixed; a quadrangular pyramid-shaped prism formed on the upper part of the micro-channel structure; a sample injection unit for injecting, into the micro-channel, a buffer solution containing the first sample; a polarized light generation unit for emitting incident light polarized through the prism on the micro-channel at an incident angle that satisfies a p-wave non-reflection condition; and a polarized light detection unit for d
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: August 8, 2023
    Assignee: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Hyun Mo Cho, Yong Jai Cho, Won Chegal
  • Publication number: 20230168185
    Abstract: An embodiment of the present disclosure provides a multi-reflection silicon-based liquid immersion micro-channel measurement device and measurement method capable of improving measurement sensitivity by completely separating, through multi-reflection, first reflective light reflected by a sample detection layer and a second reflective light by a prism-buffer solution interface and by allowing the light to enter multiple times through the multi-reflection.
    Type: Application
    Filed: September 21, 2020
    Publication date: June 1, 2023
    Inventors: Hyun Mo CHO, Dong Hyung KIM, Won CHEGAL, Yong Jai CHO
  • Patent number: 11493433
    Abstract: The present invention relates to a normal incidence ellipsometer and a method for measuring the optical properties of a sample by using same. The purpose of the present invention is to provide: a normal incidence ellipsometer in which a wavelength-dependent compensator is replaced with a wavelength-independent linear polarizer such that equipment calibration procedures are simplified while a measurement wavelength range expansion can be easily implemented; and a method for measuring the optical properties of a sample by using same.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: November 8, 2022
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Patent number: 11402321
    Abstract: The present chip relates to a high-sensitive biosensor chip using a high extinction coefficient marker and a dielectric substrate, a measurement system, and a measurement method and, more specifically, to an ellipsometry-based high-sensitive biosensor technology or a measurement method using same, the technology amplifying an elliptically polarized signal by a marker having a high extinction coefficient and a dielectric substrate. The marker and the substrate used in the present chip measure a Brewster's angle shift or an elliptical polarization measurement angle with respect to an ultra-low concentration biological material (e.g. antibody or DNA).
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: August 2, 2022
    Assignee: KOREA RESEARCH INSTITUTE OF STANDARD AND SCIENCE
    Inventors: Hyun-mo Cho, Dong-hyung Kim, Yong-jai Cho, Won Chegal
  • Publication number: 20210181090
    Abstract: The present invention relates to a normal incidence ellipsometer and a method for measuring the optical properties of a sample by using same. The purpose of the present invention is to provide: a normal incidence ellipsometer in which a wavelength-dependent compensator is replaced with a wavelength-independent linear polarizer such that equipment calibration procedures are simplified while a measurement wavelength range expansion can be easily implemented; and a method for measuring the optical properties of a sample by using same.
    Type: Application
    Filed: July 3, 2019
    Publication date: June 17, 2021
    Inventors: Yong Jai CHO, Won CHEGAL, Hyun Mo CHO
  • Publication number: 20210072149
    Abstract: The present chip relates to a high-sensitive biosensor chip using a high extinction coefficient marker and a dielectric substrate, a measurement system, and a measurement method and, more specifically, to an ellipsometry-based high-sensitive biosensor technology or a measurement method using same, the technology amplifying an elliptically polarized signal by a marker having a high extinction coefficient and a dielectric substrate. The marker and the substrate used in the present chip measure a Brewster's angle shift or an elliptical polarization measurement angle with respect to an ultra-low concentration biological material (e.g. antibody or DNA).
    Type: Application
    Filed: August 20, 2019
    Publication date: March 11, 2021
    Inventors: Hyun-mo CHO, Dong-hyung KIM, Yong-jai CHO, Won CHEGAL
  • Patent number: 10921241
    Abstract: An oblique incidence, prism-incident, silicon-based, immersion microchannel-based measurement device may include: a microchannel structure which has a support, a substrate which is formed on the support and made of a semiconductor or dielectric material, a cover part which has a prism structure and is installed on the support, and a microchannel which is formed in any one of an upper portion of the support and a lower end of the cover part; a sample injection part which forms an adsorption layer for a sample on a substrate by injecting a buffer solution containing the sample made of a biomaterial into the microchannel; a polarized light generation part which emits polarized incident light through an incident surface of the prism to the adsorption layer at an incident angle that satisfies a p-wave antireflection condition; and a polarized light detection part.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: February 16, 2021
    Assignee: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Hyun Mo Cho, Won Chegal, Yong Jai Cho
  • Publication number: 20190346363
    Abstract: The present invention relates to a liquid immersion micro-channel measurement device and measurement method which are based on trapezoidal incident structure prism incident-type silicon, and according to one embodiment of the present invention, the liquid immersion micro-channel measurement device based on trapezoidal incident structure prism incident-type silicon comprises: a micro-channel structure including a support and at least one micro-channel, which is formed on the support and has a sample detection layer to which a first bioadhesive material for detecting a first sample is fixed; a quadrangular pyramid-shaped prism formed on the upper part of the micro-channel structure; a sample injection unit for injecting, into the micro-channel, a buffer solution containing the first sample; a polarized light generation unit for emitting incident light polarized through the prism on the micro-channel at an incident angle that satisfies a p-wave non-reflection condition; and a polarized light detection unit for d
    Type: Application
    Filed: December 15, 2016
    Publication date: November 14, 2019
    Inventors: Hyun Mo CHO, Yong Jai CHO, Won CHEGAL
  • Patent number: 10458901
    Abstract: An apparatus and method for simultaneously measuring, in an immersion microchannel environment, the characteristics of molecular junctions such as a low-molecular-weight biomaterial and the like and the refractive index of a buffer solution by using ellipsometry. Specifically, disclosed is an apparatus for simultaneously measuring, with high sensitivity, the change in refractive index of a buffer solution and the junction dynamic characteristics of a biomaterial by allowing polarized incident light to be received at a biomaterial adsorption layer, which is formed on a substrate such as a semiconductor and the like, so as to meet an anti-reflection condition of a P-wave by using a prism structure and a microchannel; and a measurement method using the same.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: October 29, 2019
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Hyun Mo Cho, Yong Jai Cho, Won Chegal
  • Patent number: 10317334
    Abstract: The present invention relates to an optical element rotation type ellipsometer, and more particularly, to an ellipsometer used to measure Mueller-matrix components of a sample by measuring and analyzing a change in a polarization state of light reflected or transmitted by the sample. According to the exemplary embodiment of the present invention, it is possible to provide the achromatic rotating-element ellipsometer and the method for measuring Mueller-matrix elements of a sample using the same capable of measuring the Mueller-matrix elements of the anisotropic sample as well as the isotropic sample by using four polarizers.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: June 11, 2019
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Patent number: 10145785
    Abstract: Provided is an optical element rotation type Mueller-matrix ellipsometer for solving a problem of measurement accuracy and measurement precision occurring due to residual polarization of a light source, polarization dependence of a photo-detector, measurement values of Fourier coefficients of a high order term in dual optical element rotation type Mueller-matrix ellipsometers according to the related art capable of measuring some or all of components of a Mueller-matrix for any sample.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: December 4, 2018
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Publication number: 20180113069
    Abstract: The present invention relates to an optical element rotation type ellipsometer, and more particularly, to an ellipsometer used to measure Mueller-matrix components of a sample by measuring and analyzing a change in a polarization state of light reflected or transmitted by the sample. According to the exemplary embodiment of the present invention, it is possible to provide the achromatic rotating-element ellipsometer and the method for measuring Mueller-matrix elements of a sample using the same capable of measuring the Mueller-matrix elements of the anisotropic sample as well as the isotropic sample by using four polarizers.
    Type: Application
    Filed: March 8, 2016
    Publication date: April 26, 2018
    Inventors: Yong Jai CHO, Won CHEGAL, Hyun Mo CHO
  • Publication number: 20180100795
    Abstract: An oblique incidence, prism-incident, silicon-based, immersion microchannel-based measurement device related to an example of the present disclosure may include: a microchannel structure which has a support, a substrate which is formed on the support and made of a semiconductor or dielectric material, a cover part which has a prism structure and is installed on the support, and a microchannel which is formed in any one of an upper portion of the support and a lower end of the cover part; a sample injection part which forms an adsorption layer for a sample on a substrate by injecting a buffer solution containing the sample made of a biomaterial into the microchannel; a polarized light generation part which emits polarized incident light through an incident surface of the prism to the adsorption layer at an incident angle that satisfies a p-wave antireflection condition; and a polarized light detection part which first reflective light reflected by at least one of the adsorption layer and the substrate enters t
    Type: Application
    Filed: April 27, 2016
    Publication date: April 12, 2018
    Inventors: Hyun Mo CHO, Won CHEGAL, Yong Jai CHO
  • Patent number: 9581498
    Abstract: Provided are a rotating-element spectroscopic ellipsometer and a method for measurement precision prediction of a rotating-element spectroscopic ellipsometer, a recording medium storing program for executing the same, and a computer program stored in a medium for executing the same, and more particularly, a rotating-element spectroscopic ellipsometer and a method for measurement precision prediction of a rotating-element spectroscopic ellipsometer capable of calculating the measurement precision of the rotating-element spectroscopic ellipsometer based on a theoretical equation on standard deviations of ellipsometric parameters for a sample, a recording medium storing program for executing the same, and a computer program stored in a medium for executing the same.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: February 28, 2017
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Publication number: 20160169742
    Abstract: Provided are a rotating-element spectroscopic ellipsometer and a method for measurement precision prediction of a rotating-element spectroscopic ellipsometer, a recording medium storing program for executing the same, and a computer program stored in a medium for executing the same, and more particularly, a rotating-element spectroscopic ellipsometer and a method for measurement precision prediction of a rotating-element spectroscopic ellipsometer capable of calculating the measurement precision of the rotating-element spectroscopic ellipsometer based on a theoretical equation on standard deviations of ellipsometric parameters for a sample, a recording medium storing program for executing the same, and a computer program stored in a medium for executing the same.
    Type: Application
    Filed: December 15, 2015
    Publication date: June 16, 2016
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Publication number: 20160153894
    Abstract: Provided is an optical element rotation type Mueller-matrix ellipsometer for solving a problem of measurement accuracy and measurement precision occurring due to residual polarization of a light source, polarization dependence of a photo-detector, measurement values of Fourier coefficients of a high order term in dual optical element rotation type Mueller-matrix ellipsometers according to the related art capable of measuring some or all of components of a Mueller-matrix for any sample.
    Type: Application
    Filed: May 13, 2014
    Publication date: June 2, 2016
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Publication number: 20150253243
    Abstract: An apparatus and method for simultaneously measuring, in an immersion microchannel environment, the characteristics of molecular junctions such as a low-molecular-weight biomaterial and the like and the refractive index of a buffer solution by using ellipsometry. Specifically, disclosed is an apparatus for simultaneously measuring, with high sensitivity, the change in refractive index of a buffer solution and the junction dynamic characteristics of a biomaterial by allowing polarized incident light to be received at a biomaterial adsorption layer, which is formed on a substrate such as a semiconductor and the like, so as to meet an anti-reflection condition of a P-wave by using a prism structure and a microchannel; and a measurement method using the same.
    Type: Application
    Filed: September 27, 2013
    Publication date: September 10, 2015
    Inventors: Hyun Mo Cho, Yong Jai Cho, Won Chegal
  • Patent number: 8705039
    Abstract: Provided is a multi-channel surface plasmon resonance sensor using beam profile ellipsometry; and, more particularly, to a high sensitive measuring technology, which is coupled with a vertical illumination type focused-beam ellipsometer using a multi-incident angle measurement method, and a surface plasmon resonance (SPR) sensing part deposited with a metal thin film. The multi-channel surface plasmon resonance sensor includes a vertical illumination type focused-beam ellipsometer, in which light is polarized; a surface plasmon resonance (SPR) sensing part which is provided at the objective lens part of the focused-beam ellipsometer so as to generate SPR according to an angle change of the polarized light; and a flow unit which supplies a buffer solution containing a bio material binding to or dissociation from the metal thin film generating surface plasmon, wherein the SPR and the ellipsometric phase change by change in an angle and a wavelength are simultaneously detected.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: April 22, 2014
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Hyun Mo Cho, Yong Jai Cho, Won Chegal
  • Patent number: 8705033
    Abstract: Provided is a multi-channel surface plasmon resonance sensor using beam profile ellipsometry; and, more particularly, to a high sensitive measuring technology, which is coupled with a vertical illumination type focused-beam ellipsometer using a multi-incident angle measurement method, and a surface plasmon resonance (SPR) sensing part deposited with a metal thin film. The multi-channel surface plasmon resonance sensor includes a vertical illumination type focused-beam ellipsometer in which light is polarized; a surface plasmon resonance (SPR) sensing part which is provided at the objective lens part of the focused-beam ellipsometer; and a multi-channel flow unit which supplies a buffer solution containing a bio material binding to or dissociation from a metal thin film generating surface plasmon.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: April 22, 2014
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Hyun Mo Cho, Yong Jai Cho, Won Chegal
  • Patent number: 8447546
    Abstract: Provided is a measurement method of Fourier coefficients using an integrating photometric detector, wherein, when measuring an exposure (Sj) with a predetermined time interval during a predetermined time period using an integrating photometric detector with respect to light of which amplitude varies with the time period, normalized Fourier coefficients (??2n, ??2n) for a waveform of an intensity of the light is determined by carrying out a discrete Fourier transform with respect to an equation for the measured exposure (Sj).
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: May 21, 2013
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho