Patents by Inventor Hyun Mo Cho

Hyun Mo Cho 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: 8830463
    Abstract: Provided is a real-time spectroscopic ellipsometer capable of obtaining information on properties of a sample, a nano pattern shape, in real time by measuring and analyzing, for a plurality of wavelengths, a change in a polarization state of incident light generated while being reflected or transmitted due to the sample when light having a specific polarization component is incident to the sample.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: September 9, 2014
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Yong Jai Cho, Won Che Gal, Hyun Mo Cho
  • 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
  • Publication number: 20130044318
    Abstract: Provided is a real-time spectroscopic ellipsometer capable of obtaining information on properties of a sample, a nano pattern shape, in real time by measuring and analyzing, for a plurality of wavelengths, a change in a polarization state of incident light generated while being reflected or transmitted due to the sample when light having a specific polarization component is incident to the sample.
    Type: Application
    Filed: August 16, 2012
    Publication date: February 21, 2013
    Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Yong Jai CHO, Won CHE GAL, Hyun Mo CHO
  • Publication number: 20120295357
    Abstract: The present invention relates to an apparatus for quantifying the binding and dissociation kinetics of molecular interactions of small molecular bio materials with high sensitivity almost without the influence of a change in the reflective index resulting from a buffer solution by making polarized incident light incident on the binding layer of a bio material, formed in a thin dielectric film, so that the polarized incident light satisfies a p-wave non-reflecting condition and a quantifying method using the same.
    Type: Application
    Filed: October 29, 2010
    Publication date: November 22, 2012
    Inventors: Hyun Mo Cho, Gal Won Che, Yong Jai Cho
  • Patent number: 8300221
    Abstract: The present invention relates to a minute measuring instrument for high speed and large area and a method thereof, and more particularly, to a minute measuring instrument for high speed and large area which measures properties of a specimen in high speed by a focused-beam ellipsometric part and then minutely remeasures the position showing a singular point by a minute measuring part and a method thereof.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: October 30, 2012
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Publication number: 20120057146
    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: Application
    Filed: November 30, 2009
    Publication date: March 8, 2012
    Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Hyun Mo Cho, Yong Jai Cho, Won Chegal
  • Publication number: 20110216320
    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: Application
    Filed: November 30, 2009
    Publication date: September 8, 2011
    Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Hyun Mo Cho, Yong Jai Cho, Won Chegal
  • Patent number: 8009292
    Abstract: The present invention relates to a single-polarizer focused-beam ellipsometer. An ellipsometer according to the present invention includes a light source (210); a beam splitting part (220) for splitting a light generated in the light source (210) into a polarized light; an objective lens (230) for concentrately irradiating some of light split by the beam splitting part (220) onto a specimen (240); a photodetector (250) for detecting the light passed through the objective lens 230 and the beam splitting part (220) after reflected from the specimen (240) with unit cells; and a central processing unit (260) for correcting the intensity of the light detected by the photodetector (250) into a value corresponding to the unit cell of the photodetector (250) along multiple incidence plane passage of 360° with respect to respective incidence angles and processing the corrected value.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: August 30, 2011
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Yong Jai Choi, Won Chegal, Hyun Mo Cho
  • Patent number: 8004677
    Abstract: The present invention relates to an ellipsometer, and more particularly, to an ellipsometer to find out the optical properties of the sample by analyzing the variation of the polarization of a light which has specific polarisation then reflected on a surface of the sample.
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: August 23, 2011
    Assignees: Korea Research Institute of Standards and Science, K-MAC
    Inventors: Joong Whan Lee, Young June Ko, Young Sun Park, Yoon Jong Park, Chi Woon Jeong, Sang Heon Ye, Yong Jai Cho, Hyun Mo Cho, Won Chegal
  • Publication number: 20110077883
    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: Application
    Filed: July 21, 2010
    Publication date: March 31, 2011
    Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Yong Jai CHO, Won CHEGAL, Hyun Mo CHO
  • Publication number: 20100321693
    Abstract: The present invention relates to a minute measuring instrument for high speed and large area and a method thereof, and more particularly, to a minute measuring instrument for high speed and large area which measures properties of a specimen in high speed by a focused-beam ellipsometric part and then minutely remeasures the position showing a singular point by a minute measuring part and a method thereof.
    Type: Application
    Filed: November 11, 2008
    Publication date: December 23, 2010
    Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Publication number: 20100296092
    Abstract: The present invention relates to a single-polarizer focused-beam ellipsometer. An ellipsometer according to the present invention includes a light source (210); a beam splitting part (220) for splitting a light generated in the light source (210) into a polarized light; an objective lens (230) for concentrately irradiating some of light split by the beam splitting part (220) onto a specimen (240); a photodetector (250) for detecting the light passed through the objective lens 230 and the beam splitting part (220) after reflected from the specimen (240) with unit cells; and a central processing unit (260) for correcting the intensity of the light detected by the photodetector (250) into a value corresponding to the unit cell of the photodetector (250) along multiple incidence plane passage of 360° with respect to respective incidence angles and processing the corrected value.
    Type: Application
    Filed: November 11, 2008
    Publication date: November 25, 2010
    Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Publication number: 20100045985
    Abstract: The present invention relates to an ellipsometer, and more particularly, to an ellipsometer to find out the optical properties of the sample by analyzing the variation of the polarization of a light which has specific polarisation then reflected on a surface of the sample.
    Type: Application
    Filed: June 20, 2007
    Publication date: February 25, 2010
    Inventors: Joong Whan Lee, Young June Ko, Young Sun Park, Yoon Jong Park, Chi Woon Jeong, Sang Heon Ye, Yong Jai Cho, Hyun Mo Cho, Won Chegal