Patents by Inventor Soong Ju Oh

Soong Ju Oh 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: 11839033
    Abstract: Disclosed are a method of directly patterning a stretchable substrate; and a stretchable electrode fabricated by the method. More particularly, the method of directly patterning a stretchable substrate includes: forming a hydrophilic group on a surface of a stretchable substrate by UV-ozone treatment; forming at least one layer to be etched on the hydrophilic group-formed stretchable substrate, wherein the at least one layer to be etched includes an adhesion enhancing material; forming a photoresist layer on the at least one layer to be etched; exposing the photoresist layer; and patterning the at least one layer to be etched using the exposed photoresist layer, wherein a carbon chain included in the adhesion enhancing material forms ether bonding (R—O—R) with a hydrophilic group formed on the surface of the stretchable substrate.
    Type: Grant
    Filed: April 25, 2022
    Date of Patent: December 5, 2023
    Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Soong Ju Oh, Jun Sung Bang
  • Patent number: 11788901
    Abstract: Disclosed are a high-sensitivity temperature sensor and a method of manufacturing the same.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: October 17, 2023
    Assignee: Korea University Research and Business Foundation
    Inventors: Soong Ju Oh, Jun Sung Bang
  • Patent number: 11749800
    Abstract: Disclosed are a high performance stretchable electrode having a double layer structure with flexibility and high coverage, as well as a manufacturing method thereof. The stretchable electrode of the present invention has excellent performance based on high coverage. Therefore, the present invention may provide a high performance stretchable electrode with high conductivity and low gauge factor by selectively adjusting flexibility of the electrode.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: September 5, 2023
    Assignee: Korea University Research and Business Foundation
    Inventors: Soong Ju Oh, Jun Sung Bang, Jun Hyuk Ahn, Yong Min Lee, Sang Yeop Lee
  • Patent number: 11701909
    Abstract: Disclosed is a patterning method by ink lithography. More particularly, the patterning method includes coating thin film-forming nanoparticles surrounded by the first ligand on a substrate to form a nanoparticle thin film; directly spraying a ligand-substituting ink to a selected region on the nanoparticle thin film to form a region in which the first ligand is substituted with the second ligand; and washing the nanoparticle thin film with a washing solvent so that the region substituted with the second ligand is patterned.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: July 18, 2023
    Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Soong Ju Oh, Jun Hyuk Ahn
  • Publication number: 20230071027
    Abstract: Disclosed are a functional photoresist for patterning a nanoparticle thin film including nanoparticles on a substate and a method of patterning a nanoparticle thin film using the functional photoresist, wherein the functional photoresist includes a photoactive compound (PAC); and a functional ligand that is bound to the surfaces of the nanoparticles and controls the physical properties of the nanoparticles.
    Type: Application
    Filed: August 22, 2022
    Publication date: March 9, 2023
    Applicant: Korea University Research and Business Foundation
    Inventors: Soong Ju OH, Jun Hyuk AHN, Jung Ho BAE
  • Publication number: 20230069115
    Abstract: Disclosed is a method of exchanging the anions of inorganic halide perovskite nanoparticles using cationic effect. More particularly, the method is a cation effect-based anion exchange method of being capable of improving optical stability while controlling the optical band energy of CsPbBr3 perovskite nanoparticles at room temperature. According to an embodiment of the present disclosure, a cation-anion pair suitable for anion exchange and stability improvement can be provided.
    Type: Application
    Filed: August 30, 2022
    Publication date: March 2, 2023
    Applicant: Korea University Research and Business Foundation
    Inventors: Soong Ju OH, Jun Hyuk AHN, Yong Min LEE
  • Publication number: 20220388323
    Abstract: Disclosed is a patterning method by ink lithography. More particularly, the patterning method includes coating thin film-forming nanoparticles surrounded by the first ligand on a substrate to form a nanoparticle thin film; directly spraying a ligand-substituting ink to a selected region on the nanoparticle thin film to form a region in which the first ligand is substituted with the second ligand; and washing the nanoparticle thin film with a washing solvent so that the region substituted with the second ligand is patterned.
    Type: Application
    Filed: March 31, 2022
    Publication date: December 8, 2022
    Inventors: Soong Ju OH, Jun Hyuk AHN
  • Publication number: 20220386477
    Abstract: Disclosed are a method of directly patterning a stretchable substrate; and a stretchable electrode fabricated by the method. More particularly, the method of directly patterning a stretchable substrate includes: forming a hydrophilic group on a surface of a stretchable substrate by UV-ozone treatment; forming at least one layer to be etched on the hydrophilic group-formed stretchable substrate, wherein the at least one layer to be etched includes an adhesion enhancing material; forming a photoresist layer on the at least one layer to be etched; exposing the photoresist layer; and patterning the at least one layer to be etched using the exposed photoresist layer, wherein a carbon chain included in the adhesion enhancing material forms ether bonding (R—O—R) with a hydrophilic group formed on the surface of the stretchable substrate.
    Type: Application
    Filed: April 25, 2022
    Publication date: December 1, 2022
    Inventors: Soong Ju OH, Jun Sung BANG
  • Publication number: 20220115161
    Abstract: Disclosed are a high performance stretchable electrode having a double layer structure with flexibility and high coverage, as well as a manufacturing method thereof. The stretchable electrode of the present invention has excellent performance based on high coverage. Therefore, the present invention may provide a high performance stretchable electrode with high conductivity and low gauge factor by selectively adjusting flexibility of the electrode.
    Type: Application
    Filed: September 29, 2021
    Publication date: April 14, 2022
    Applicant: Korea University Research and Business Foundation
    Inventors: Soong Ju OH, Jun Sung BANG, Jun Hyuk AHN, Yong Min LEE, Sang Yeop LEE
  • Publication number: 20210116310
    Abstract: Disclosed are a high-sensitivity temperature sensor and a method of manufacturing the same.
    Type: Application
    Filed: October 20, 2020
    Publication date: April 22, 2021
    Applicant: Korea University Research and Business Foundation
    Inventors: Soong Ju OH, Jun Sung BANG
  • Patent number: 10859450
    Abstract: The present disclosure discloses a strain sensor and a method of fabricating the same. The strain sensor according to an embodiment of the present disclosure includes an X-axis sensor formed on a flexible insulating substrate and responsible for sensing X-axis strain; a Y-axis sensor formed on the flexible insulating substrate to be orthogonal to the X-axis sensor and responsible for sensing Y-axis strain; a metal electrode formed on a region of the flexible insulating substrate where the X-axis sensor and the Y-axis sensor are not formed; and an encapsulation layer formed on the X-axis sensor, the Y-axis sensor, and the metal electrode. In this case, the X-axis sensor and the Y-axis sensor have a metal-insulator heterostructure.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: December 8, 2020
    Assignee: Korea University Research and Business Foundation
    Inventors: Soong Ju Oh, Woo Seok Lee, Dong Gyu Kim
  • Publication number: 20200256748
    Abstract: The present disclosure discloses a strain sensor and a method of fabricating the same. The strain sensor according to an embodiment of the present disclosure includes an X-axis sensor formed on a flexible insulating substrate and responsible for sensing X-axis strain; a Y-axis sensor formed on the flexible insulating substrate to be orthogonal to the X-axis sensor and responsible for sensing Y-axis strain; a metal electrode formed on a region of the flexible insulating substrate where the X-axis sensor and the Y-axis sensor are not formed; and an encapsulation layer formed on the X-axis sensor, the Y-axis sensor, and the metal electrode. In this case, the X-axis sensor and the Y-axis sensor have a metal-insulator heterostructure.
    Type: Application
    Filed: September 9, 2019
    Publication date: August 13, 2020
    Applicant: Korea University Research and Business Foundation
    Inventors: Soong Ju OH, Woo Seok LEE, Dong Gyu KIM
  • Patent number: 10593755
    Abstract: Colloidal nanocrystal electronic devices including multiple types of nanocrystal device elements including nanocrystal metallic electrodes, nanocrystal insulators, and nanocrystal insulators. Colloidal nanocrystal electronic devices may be produced by forming multiple nanocrystal electronic device elements on a substrate.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: March 17, 2020
    Assignees: The Trustees of the University of Pennsylvania, Korea Institute of Geoscience and Mineral Resources
    Inventors: Cherie R. Kagan, Ji-Hyuk Choi, Han Wang, Soong Ju Oh
  • Publication number: 20190131393
    Abstract: Colloidal nanocrystal electronic devices including multiple types of nanocrystal device elements including nanocrystal metallic electrodes, nanocrystal insulators, and nanocrystal insulators. Colloidal nanocrystal electronic devices may be produced by forming multiple nanocrystal electronic device elements on a substrate.
    Type: Application
    Filed: April 6, 2017
    Publication date: May 2, 2019
    Applicants: The Trustees of the University of Pennsylvania, Korea Institute of Geoscience and Mineral Resources
    Inventors: Cherie R. KAGAN, Ji-Hyuk CHOI, Han WANG, Soong Ju OH
  • Patent number: 10096734
    Abstract: Methods of forming colloidal nanocrystal (NC)-based thin film devicesare disclosed. The methods include the steps of depositing a dispersion of NCs on a substrate to form a NC thin-film, wherein at least a portion of the NCs is capped with chalcogenocyanate (xCN)-based ligands; and doping the NC thin-film with a metal.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: October 9, 2018
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Cherie R. Kagan, Aaron T. Fafarman, Ji-Hyuk Choi, Weon-Kyu Koh, David K. Kim, Soong Ju Oh, Yuming Lai, Sung-Hoon Hong, Sangameshwar Rao Saudari, Christopher B. Murray
  • Patent number: 10096733
    Abstract: Methods of preparing a dispersion of colloidal nanocrystals (NCs) for use as NC thin films are disclosed. A dispersion of NCs capped with ligands may be mixed with a solution containing chalcogenocyanate (xCN)-based ligands. The mixture may be separated into a supernatant and a flocculate. The flocculate may be dispersed with a solvent to form a subsequent dispersion of NCs capped with xCN-based ligands.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: October 9, 2018
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Cherie R. Kagan, Aaron T. Fafarman, Ji-Hyuk Choi, Weon-Kyu Koh, David K. Kim, Soong Ju Oh, Yuming Lai, Sung-Hoon Hong, Sangameshwar Rao Saudari, Christopher B. Murray
  • Publication number: 20160336474
    Abstract: Methods of forming colloidal nanocrystal (NC)-based thin film devicesare disclosed. The methods include the steps of depositing a dispersion of NCs on a substrate to form a NC thin-film, wherein at least a portion of the NCs is capped with chalcogenocyanate (xCN)-based ligands; and doping the NC thin-film with a metal.
    Type: Application
    Filed: May 10, 2016
    Publication date: November 17, 2016
    Inventors: CHERIE R. KAGAN, AARON T. FAFARMAN, JI-HYUK CHOI, WEON-KYU KOH, DAVID K. KIM, SOONG JU OH, YUMING LAI, SUNG-HOON HONG, SANGAMESHWAR RAO SAUDARI, CHRISTOPHER B. MURRAY
  • Publication number: 20160336087
    Abstract: Methods of preparing a dispersion of colloidal nanocrystals (NCs) for use as NC thin films are disclosed. A dispersion of NCs capped with ligands may be mixed with a solution containing chalcogenocyanate (xCN)-based ligands. The mixture may be separated into a supernatant and a flocculate. The flocculate may be dispersed with a solvent to form a subsequent dispersion of NCs capped with xCN-based ligands.
    Type: Application
    Filed: May 10, 2016
    Publication date: November 17, 2016
    Inventors: Cherie R. Kagan, AARON T. FAFARMAN, JI-HYUK CHOI, WEON-KYU KOH, DAVID K. KIM, SOONG JU OH, YUMING LAI, SUNG-HOON HONG, SANGAMESHWAR RAO SAUDARI, CHRISTOPHER B. MURRAY
  • Patent number: 9336919
    Abstract: Methods of exchanging ligands to form colloidal nanocrystals (NCs) with chalcogenocyanate (xCN)-based ligands and apparatuses using the same are disclosed. The ligands may be exchanged by assembling NCs into a thin film and immersing the thin film in a solution containing xCN-based ligands. The ligands may also be exchanged by mixing a xCN-based solution with a dispersion of NCs, flocculating the mixture, centrifuging the mixture, discarding the supernatant, adding a solvent to the pellet, and dispersing the solvent and pellet to form dispersed NCs with exchanged xCN-ligands. The NCs with xCN-based ligands may be used to form thin film devices and/or other electronic, optoelectronic, and photonic devices. Devices comprising nanocrystal-based thin films and methods for forming such devices are also disclosed. These devices may be constructed by depositing NCs on to a substrate to form an NC thin film and then doping the thin film by evaporation and thermal diffusion.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: May 10, 2016
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Cherie R. Kagan, Aaron T. Fafarman, Ji-Hyuk Choi, Weon-kyu Koh, David K. Kim, Soong Ju Oh, Yuming Lai, Sung-Hoon Hong, Sangameshwar Rao Saudari, Christopher B. Murray
  • Publication number: 20140050851
    Abstract: Methods of exchanging ligands to form colloidal nanocrystals (NCs) with chalcogenocyanate (xCN)-based ligands and apparatuses using the same are disclosed. The ligands may be exchanged by assembling NCs into a thin film and immersing the thin film in a solution containing xCN-based ligands. The ligands may also be exchanged by mixing a xCN-based solution with a dispersion of NCs, flocculating the mixture, centrifuging the mixture, discarding the supernatant, adding a solvent to the pellet, and dispersing the solvent and pellet to form dispersed NCs with exchanged xCN-ligands. The NCs with xCN-based ligands may be used to form thin film devices and/or other electronic, optoelectronic, and photonic devices. Devices comprising nanocrystal-based thin films and methods for forming such devices are also disclosed. These devices may be constructed by depositing NCs on to a substrate to form an NC thin film and then doping the thin film by evaporation and thermal diffusion.
    Type: Application
    Filed: August 19, 2013
    Publication date: February 20, 2014
    Inventors: Cherie R. Kagan, Aaron T. Fafarman, Ji-Hyuk Choi, Weon-kyu Koh, David K. Kim, Soong Ju Oh, Yuming Lai, Sung-Hoon Hong, Sangameshwar Rao Saudari, Christopher B. Murray