Patents by Inventor Taek-Sung Lee
Taek-Sung Lee 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).
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Patent number: 11527673Abstract: An embodiment includes a method of texturing a semiconductor substrate, a semiconductor substrate manufactured using the method, and a solar cell including the semiconductor substrate, the method including: forming metal nanoparticles on a semiconductor substrate, primarily etching the semiconductor substrate, removing the metal nanoparticles, and secondarily etching the primarily etched semiconductor substrate to form nanostructures.Type: GrantFiled: November 1, 2017Date of Patent: December 13, 2022Assignee: Korea Institute of Science and TechnologyInventors: Doh Kwon Lee, In Ho Kim, Won Mok Kim, Jong Keuk Park, Taek Sung Lee, Doo Seok Jeong, Hyeon Seung Lee, Jeung Hyun Jeong
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Publication number: 20200343404Abstract: An embodiment includes a method of texturing a semiconductor substrate, a semiconductor substrate manufactured using the method, and a solar cell including the semiconductor substrate, the method including: forming metal nanoparticles on a semiconductor substrate, primarily etching the semiconductor substrate, removing the metal nanoparticles, and secondarily etching the primarily etched semiconductor substrate to form nanostructures.Type: ApplicationFiled: November 1, 2017Publication date: October 29, 2020Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Doh Kwon LEE, In Ho Kim, Won Mok Kim, Jong Keuk Park, Taek Sung Lee, Doo Seok Jeong, Hyeon Seung Lee, Jeung Hyun Jeong
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Patent number: 9726788Abstract: A method for fabricating a nanoantenna array may include forming a resist layer on a substrate, forming a focusing layer having a dielectric microstructure array on the resist layer, diffusing light one-dimensionally in a specific direction by using a linear diffuser, forming an anisotropic pattern on the resist layer by illuminating the light diffused by the linear diffuser on the focusing layer and the resist layer, depositing a material suitable for a plasmonic resonance onto the substrate and the resist layer on which the pattern is formed, and forming a nanoantenna array on the substrate by removing the resist layer and the material deposited on the resist layer. A light diffusing angle by the linear diffuser and a size of the dielectric microstructure are determined based on an aspect ratio of the pattern to be formed.Type: GrantFiled: April 15, 2014Date of Patent: August 8, 2017Assignee: Korea Institute of Science and TechnologyInventors: Kyeong Seok Lee, Won Mok Kim, Taek Sung Lee, Wook Seong Lee, Doo Seok Jeong, Inho Kim
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Patent number: 9482798Abstract: A plasmonic nano-color coating layer includes a composite layer including a plurality of metal particle layers and a plurality of matrix layers and having a periodic multilayer structure in which the metal particle layers and the matrix layers are alternately arranged, a dielectric buffer layer located below the composite layer, and a mirror layer located below the dielectric buffer layer, wherein the color of the plasmonic nano-color coating layer is determined based on a nominal thickness of the metal particle layer and a separation between the metal particle layers.Type: GrantFiled: March 19, 2014Date of Patent: November 1, 2016Assignee: Korea Institute of Science and TechnologyInventors: Kyeong Seok Lee, Won Mok Kim, Taek Sung Lee, Wook Seong Lee, Doo Seok Jeong, Inho Kim
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Patent number: 9285534Abstract: A fiber-optic surface plasmon resonance sensor may include an optical fiber and a surface plasmon excitation layer. The optical fiber may include a core, a cladding surrounding the core, and a depression. The surface plasmon excitation layer may include a first excitation layer, a second excitation layer and an optical waveguide layer between the first excitation layer and the second excitation layer. Incident light incident through the core may be coupled to the surface plasmon excitation layer at a specific angle of incidence and wavelength satisfying the surface plasmon resonance condition. Depending on the polarizing direction of the incident light, an s-polarized component may be coupled to the guided-wave mode in the optical waveguide layer constituting the surface plasmon excitation layer.Type: GrantFiled: January 25, 2012Date of Patent: March 15, 2016Assignee: Korea Institute of Science and TechnologyInventors: Kyeong Seok Lee, Won Mok Kim, Taek Sung Lee, In Ho Kim
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Publication number: 20150146180Abstract: A method for fabricating a nanoantenna array may include forming a resist layer on a substrate, forming a focusing layer having a dielectric microstructure array on the resist layer, diffusing light one-dimensionally in a specific direction by using a linear diffuser, forming an anisotropic pattern on the resist layer by illuminating the light diffused by the linear diffuser on the focusing layer and the resist layer, depositing a material suitable for a plasmonic resonance onto the substrate and the resist layer on which the pattern is formed, and forming a nanoantenna array on the substrate by removing the resist layer and the material deposited on the resist layer. A light diffusing angle by the linear diffuser and a size of the dielectric microstructure are determined based on an aspect ratio of the pattern to be formed.Type: ApplicationFiled: April 15, 2014Publication date: May 28, 2015Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Kyeong Seok LEE, Won Mok KIM, Taek Sung LEE, Wook Seong LEE, Doo Seok JEONG, Inho KIM
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Publication number: 20150116856Abstract: A plasmonic nano-color coating layer includes a composite layer including a plurality of metal particle layers and a plurality of matrix layers and having a periodic multilayer structure in which the metal particle layers and the matrix layers are alternately arranged, a dielectric buffer layer located below the composite layer, and a mirror layer located below the dielectric buffer layer, wherein the color of the plasmonic nano-color coating layer is determined based on a nominal thickness of the metal particle layer and a separation between the metal particle layers.Type: ApplicationFiled: March 19, 2014Publication date: April 30, 2015Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Kyeong Seok LEE, Won Mok KIM, Taek Sung LEE, Wook Seong LEE, Doo Seok JEONG, Inho KIM
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Patent number: 8786859Abstract: Provided is a surface plasmon resonance sensor including: a part of delivering light by which a signal beam is incident to generate an evanescent field; and a part of exciting surface plasmon for exciting surface plasmons by the generated evanescent field and giving rise to a surface plasmon resonance, wherein a dielectric waveguide layer is inserted between metal layers of the part of exciting surface plasmon, and surface plasmon resonance properties are changed by an object to be analyzed.Type: GrantFiled: August 3, 2009Date of Patent: July 22, 2014Assignee: Korea Institute of Science and TechnologyInventors: Kyeong Seok Lee, Won Mok Kim, Taek Sung Lee, Byung Ki Cheong
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Patent number: 8785230Abstract: A localized surface plasmon resonance sensor may include a localized surface plasmon excitation layer including a chalcogenide material. The chalcogenide material may include: a first material including at least one of selenium (Se) and tellurium (Te); and a second material including at least one of germanium (Ge) and antimony (Sb). The localized surface plasmon excitation layer may be prepared by forming a thin film including the chalcogenide material and crystallizing the thin film to have a predetermined pattern by irradiating laser on the thin film.Type: GrantFiled: December 21, 2012Date of Patent: July 22, 2014Assignee: Korea Institute of Science and TechnologyInventors: Taek Sung Lee, Kyeong Seok Lee, In Ho Kim, Wook Seong Lee, Doo Seok Jeong, Won Mok Kim, Byung Ki Cheong
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Publication number: 20130120752Abstract: A fiber-optic surface plasmon resonance sensor may include an optical fiber and a surface plasmon excitation layer. The optical fiber may include a core, a cladding surrounding the core, and a depression. The surface plasmon excitation layer may include a first excitation layer, a second excitation layer and an optical waveguide layer between the first excitation layer and the second excitation layer. Incident light incident through the core may be coupled to the surface plasmon excitation layer at a specific angle of incidence and wavelength satisfying the surface plasmon resonance condition. Depending on the polarizing direction of the incident light, an s-polarized component may be coupled to the guided-wave mode in the optical waveguide layer constituting the surface plasmon excitation layer.Type: ApplicationFiled: January 25, 2012Publication date: May 16, 2013Inventors: Kyeong Seok LEE, Won Mok Kim, Taek Sung Lee, In Ho Kim
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Patent number: 8298495Abstract: The present invention relates to a high sensitivity localized surface plasmon resonance sensor and to a sensor system using same, the sensor comprising: a first metal layer including a first metal; a second metal layer arranged parallel to the first metal layer and including a second metal; and a conductive cross-linking layer disposed between the first metal layer and the second metal layer, and made of a third metal with a corrosion response that is different than that of the first metal and of the second metal.Type: GrantFiled: December 22, 2011Date of Patent: October 30, 2012Assignee: Korea Institute of Science and TechnologyInventors: Kyeong Seok Lee, Won Mok Kim, Taek Sung Lee
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Patent number: 8247031Abstract: Disclosed is a method for growing a thin film, which includes modifying a surface grain size and surface roughness on a thin film to improve the mobility of a carrier and a light scattering effect. The method for growing a thin film includes: forming nuclei of grains having various grain orientations on a substrate; causing first grains having a first specific grain orientation to grow predominantly among the grains having various grain orientations, thereby forming a first preferred texture comprised of the predominantly grown first grains; and then causing second grains having a second grain orientation to grow predominantly, thereby forming a second preferred texture comprised of the predominantly grown second grains, wherein the surface grain size of each of the second grains forming the second texture is larger than that of each of the first grains forming the first texture.Type: GrantFiled: April 2, 2009Date of Patent: August 21, 2012Assignee: Korea Institute of Science and TechnologyInventors: Young Joon Baik, Won Mok Kim, Kyeong Seok Lee, Jong-Keuk Park, Jeung-hyun Jeong, Suyoun Lee, Taek Sung Lee
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Publication number: 20120105857Abstract: The present invention relates to a high sensitivity localized surface plasmon resonance sensor and to a sensor system using same, the sensor comprising: a first metal layer including a first metal; a second metal layer arranged parallel to the first metal layer and including a second metal; and a conductive cross-linking layer disposed between the first metal layer and the second metal layer, and made of a third metal with a corrosion response that is different than that of the first metal and of the second metal.Type: ApplicationFiled: December 22, 2011Publication date: May 3, 2012Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Kyeong Seok Lee, Won Mok Kim, Taek Sung Lee
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Patent number: 7940637Abstract: A super-resolution optical recording medium includes a reflective layer formed on a substrate, a recording layer for recording information thereon, a super-resolution layer made of a chalcogenide semiconductor material, and a first and a second dielectric layers laminated on upper and lower surfaces of the super-resolution layer. The recording layer is made of a material that has a decomposition temperature higher than an information reproduction temperature and does not form bubble recording marks during recording, and the super-resolution layer contains one or more elements selected from the group consisting of nitrogen, oxygen, carbon, and boron.Type: GrantFiled: October 29, 2008Date of Patent: May 10, 2011Assignee: Korea Institute of Science and TechnologyInventors: Wook Yeon Hwang, Jooho Kim, Jung-Hyeon Kim, Taek Sung Lee, Byung Ki Cheong, Hyun Seok Lee, Suyoun Lee, Won Mok Kim, Jeung-hyun Jeong
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Patent number: 7906195Abstract: A super-resolution material for recording and reproducing optical information, comprises a semiconductor material which has a transmittance that increases with an increasing intensity of the incident radiation, and one or more elements selected from the group consisting of nitrogen (N), oxygen (O), carbon (C) and boron (B).Type: GrantFiled: December 4, 2007Date of Patent: March 15, 2011Assignee: Korea Institute of Science and TechnologyInventors: Byung-Ki Cheong, Taek Sung Lee, Hyun Seok Lee, Jeung-Hyun Jeong, Suyoun Lee, Won Mok Kim
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Patent number: 7851828Abstract: The present invention provides a non-volatile phase change memory cell containing an electrode contact layer disposed between a metal electrode layer and a phase change material layer, the electrode contact layer being formed of a transparent conducting oxide-based material which has a high electric conductivity, a low thermal conductivity and a good thermal stability. A non-volatile phase change memory cell according to the present invention may be utilized to reduce the electric power needed for reset and set operation.Type: GrantFiled: November 29, 2005Date of Patent: December 14, 2010Assignees: Korea Institute of Science and Technology, Seoul National University Industry FoundationInventors: Byung-ki Cheong, Jeung-hyun Jeong, Dae-Hwan Kang, Taek Sung Lee, In Ho Kim, Kyeong Seok Lee, Won Mok Kim, Dong-Ho Ahn, Ki-Bum Kim
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Patent number: 7851778Abstract: The present invention relates to a non-volatile electrical phase change memory device comprising a substrate, a first interlayer dielectric film deposited on the substrate, a bottom electrode layer formed on the first dielectric layer, a second interlayer dielectric film formed on the bottom electrode layer, a phase change material layer deposited on the second interlayer dielectric film, and a top electrode layer formed on said phase change material layer, the bottom electrode layer being brought into contact with the phase change material layer through a contact hole which is formed in the second interlayer dielectric film and filled with the phase change material or bottom electrode material, so that the phase change layer and the bottom electrode layer come into close contact with each other, wherein an interfacial control layer is formed at the interface of the contact hole between the phase change layer and the bottom electrode layer, said interfacial control layer having strong chemical bonds with theType: GrantFiled: May 24, 2007Date of Patent: December 14, 2010Assignees: Korea Institute of Science and Technology, Seoul National University Industry FoundationInventors: Dae-Hwan Kang, In-Ho Kim, Byung Ki Cheong, Jeung-Hyun Jeong, Taek Sung Lee, Won Mok Kim, Ki-Bum Kim
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Patent number: 7758941Abstract: An optical data storage medium comprises a super-resolution (SR) layer consisting of thermoelectric material, said SR layer having light absorption, transmittance and reflectance at the wavelength of an incident light and maintaining a crystalline single phase without a structural or chemical change below the melting temperature of the material. SR readout of data from and/or SR writing of data onto the medium is carried out by way of thermoelectrically induced optical changes within a local area of the SR layer under laser irradiation.Type: GrantFiled: October 28, 2004Date of Patent: July 20, 2010Assignee: Korea Institute of Science and TechnologyInventors: Byung-Ki Cheong, Hyun-Suk Lee, Taek-Sung Lee, Won-Mok Kim, Kyeong-Seok Lee, Jae-Won Lee, Sung-Ho Cho
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Publication number: 20100128273Abstract: Provided is a surface plasmon resonance sensor including: a part of delivering light by which a signal beam is incident to generate an evanescent field; and a part of exciting surface plasmon for exciting surface plasmons by the generated evanescent field and giving rise to a surface plasmon resonance, wherein a dielectric waveguide layer is inserted between metal layers of the part of exciting surface plasmon, and surface plasmon resonance properties are changed by an object to be analyzed.Type: ApplicationFiled: August 3, 2009Publication date: May 27, 2010Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Kyeong Seok LEE, Won Mok KIM, Taek Sung LEE, Byung Ki CHEONG
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Patent number: 7679954Abstract: A phase change memory apparatus includes a phase change memory array in which a plurality of phase change memory devices are arranged, and a pulse generator that supplies a writing current pulse, an erasure current pulse, and a reverse repair current pulse to the phase change memory devices in the phase change memory array. The reverse repair current pulse has opposite direction to the writing current pulse and the erasure current pulse of the phase change memory devices, and is of such a size that resultant Joule heat and electromigration move the elements of the reverse repair current pulse. The reverse repair current pulse has a width equal to or more than a smaller one of duration of a normal writing operation and duration of a normal erasure operation.Type: GrantFiled: December 29, 2008Date of Patent: March 16, 2010Assignee: Korea Institute of Science and TechnologyInventors: Suyoun Lee, Byung-ki Cheong, Jeung-hyun Jeong, Taek Sung Lee, Won Mok Kim