Patents by Inventor Min Hwan Kwak
Min Hwan Kwak 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: 11955531Abstract: An integrated circuit device includes a fin-type active region protruding from a top surface of a substrate and extending in a first direction parallel to the top surface of the substrate, a gate structure intersecting with the fin-type active region and extending on the substrate in a second direction perpendicular to the first direction, a source/drain region on a first side of the gate structure, a first contact structure on the source/drain region, and a contact capping layer on the first contact structure. A top surface of the first contact structure has a first width in the first direction, a bottom surface of the contact capping layer has a second width greater than the first width stated above in the first direction, and the contact capping layer includes a protruding portion extending outward from a sidewall of the first contact structure.Type: GrantFiled: February 27, 2023Date of Patent: April 9, 2024Assignee: Samsung Electronics Co., Ltd.Inventors: Dae-young Kwak, Ji-ye Kim, Jung-hwan Chun, Min-chan Gwak, Dong-hyun Roh, Jin-wook Lee, Sang-jin Hyun
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Patent number: 11950501Abstract: An organic light emitting device including: a substrate; a first electrode; a second electrode; and an organic layer interposed between the first electrode and the second electrode and including an emission layer, wherein one of the first electrode and the second electrode is a reflective electrode and the other is a semitransparent or transparent electrode, and wherein the organic layer includes a layer having at least one of the compounds having at least one carbazole group, and a flat panel display device including the organic light emitting device. The organic light emitting device has low driving voltage, excellent current density, high brightness, excellent color purity, high efficiency, and long lifetime.Type: GrantFiled: October 18, 2022Date of Patent: April 2, 2024Assignee: Samsung Display Co., Ltd.Inventors: Seok-Hwan Hwang, Young-Kook Kim, Yoon-Hyun Kwak, Jong-Hyuk Lee, Kwan-Hee Lee, Min-Seung Chun
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Patent number: 11935481Abstract: Provided is a display device, which includes: a reference voltage line formed along a circular outer line and configured to provide a reference voltage; a first reference voltage auxiliary line electrically connected to the reference voltage line and formed to be parallel with a predetermined interval; and a conductive line forming a contact with the reference voltage line and the first reference voltage auxiliary line and configured to provide the reference voltage to a cathode.Type: GrantFiled: November 11, 2021Date of Patent: March 19, 2024Assignee: Samsung Display Co., Ltd.Inventors: Seung Han Jo, Min Chae Kwak, Kyeong Hwa Kim, Mi Hae Kim, Kyong Hwan Oh, Su Mi Jang, Jae-Ho Choi
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Patent number: 8957441Abstract: The exemplary embodiments of the present invention include forming a photoconductor thin film on a front surface of a substrate; forming a photoconductor thin film pattern by patterning the photoconductor thin film; and forming a metal electrode on the photoconductor thin film pattern.Type: GrantFiled: November 8, 2011Date of Patent: February 17, 2015Assignee: Intellectual Discovery Co., Ltd.Inventors: Dong Suk Jun, Kwang-Yong Kang, Sungil Kim, Mun Cheol Paek, Han-Cheol Ryu, Min Hwan Kwak, Seung Beom Kang
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Publication number: 20130156436Abstract: The inventive concept relates to a terahertz receiver. The terahertz receiver of the inventive concept includes a plurality of terahertz detectors detecting signals of terahertz band from received signals; a plurality of optical signal processing parts converting the detected terahertz signals into optical signals; an optical combiner combining the converted optical signals into one optical signal; a photodiode converting the combined optical signal into an electrical signal; and an amplifier amplifying the electrical signal.Type: ApplicationFiled: September 10, 2012Publication date: June 20, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sungil KIM, Taeyong KIM, Min Hwan KWAK, Seungbeom KANG, Kwang-Yong KANG
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Publication number: 20130153757Abstract: Provided is a waveguide photomixer in which an absorption layer is selectively etched to reduce a junction area. The waveguide photomixer includes a buffer layer disposed on a substrate, a first clad layer disposed on the buffer layer and formed to have smaller width than that of a top surface of the buffer layer, an absorption layer disposed on the first clad layer and formed to have smaller width than that of a top surface of the first clad layer, a second clad layer disposed on the absorption layer and formed to have greater width than that of a top surface of the absorption layer, a contact layer disposed on the second clad layer, a first electrode unit disposed on the buffer layer where the first clad layer is not disposed, and a second electrode unit disposed on the contact layer.Type: ApplicationFiled: September 10, 2012Publication date: June 20, 2013Applicant: ELECTRONIC AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Taeyong KIM, Sungil KIM, Min Hwan KWAK, Seungbeom KANG, Kwang-Yong KANG
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Publication number: 20130156437Abstract: Disclosed is a terahertz transmitter which includes a photonics oscillator configured to generate two optical signals with different wavelength and strong correlation; a modulator configured to modulate the optical signals; a pre-amplifier configured to amplify the modulated optical signals; a photomixer configured to generate a terahertz signal through photomixing of the amplified optical signals; and a post-amplifier configured to amplify the terahertz signal and to transmit the amplified terahertz signal through an antenna.Type: ApplicationFiled: September 14, 2012Publication date: June 20, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sungil KIM, Taeyong KIM, Min Hwan KWAK, Seungbeom KANG, Kwang-Yong KANG
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Publication number: 20120166144Abstract: A device characteristics measurement method using an all-optoelectronic terahertz photomixing system includes: calculating power of an antenna of a transmitter by adding a matching condition between output impedance of the photomixer and input impedance of the antenna of the transmitter to power of the photomixer of the transmitter; calculating power of an antenna of a receiver based on the power of the antenna of the transmitter; and outputting the power of the antenna of the transmitter and the power of the antenna of the receiver so as to analyze device characteristics of the photomixer and the antenna of the transmitter.Type: ApplicationFiled: October 21, 2011Publication date: June 28, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Han-Cheol Ryu, Min Hwan Kwak, Seung beom Kang, Sungil Kim, Dong Suk Jun, Mun Cheol Paek, Kwang Yong Kang
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Publication number: 20120112230Abstract: The exemplary embodiments of the present invention include forming a photoconductor thin film on a front surface of a substrate; forming a photoconductor thin film pattern by patterning the photoconductor thin film; and forming a metal electrode on the photoconductor thin film pattern.Type: ApplicationFiled: November 8, 2011Publication date: May 10, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Dong Suk JUN, Kwang-Yong KANG, Sungil KIM, Mun Cheol PAEK, Han-Cheol RYU, Min Hwan KWAK, Seung beom KANG
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Publication number: 20120086096Abstract: Provided are a condenser lens-coupled photoconductive antenna device for terahertz wave generation and detection and a fabricating method thereof. A condenser lens-coupled photoconductive antenna device for terahertz wave generation and detection includes a condenser lens, a photoconductive thin film deposited on the condenser lens, and a metal electrode formed on the photoconductive thin film for a photoconductive antenna. In the antenna device, the condenser lens and the photoconductive thin film are coupled to each other.Type: ApplicationFiled: October 7, 2011Publication date: April 12, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Mun Cheol Paek, Kwang-Yong Kang, Min Hwan Kwak, Seungbeom Kang
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Patent number: 8053732Abstract: Provided are a terahertz wave transmission and reception (Tx/Rx) module package and method of manufacturing the same. The complete and separate terahertz wave Tx/Rx module package is implemented by simply aligning a silicon ball lens, a photoconductive antenna and a focusing lens, and thus facilitates generation or measurement of a terahertz wave. The terahertz wave Tx/Rx module package and method can remarkably reduce time and cost required to build a terahertz wave generation and measurement system, and simplify and miniaturize the terahertz wave generation and measurement system. In addition, characteristics of a terahertz wave generated by the photoconductive antenna can be simply measured. Furthermore, the terahertz wave Tx/Rx module package can be stored and transported with a photoconductive antenna, a silicon ball lens and a focusing lens kept aligned as they are, and also it is possible to minimize pollution of terahertz wave devices caused by surroundings.Type: GrantFiled: August 7, 2009Date of Patent: November 8, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Sang Kuk Choi, Kwang Yong Kang, Mun Cheol Paek, Min Hwan Kwak, Seung Beom Kang
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Patent number: 7755100Abstract: There is provided a packaging apparatus of a terahertz device, the apparatus including: a terahertz device having an active region at which terahertz wave is radiated or detected; a device substrate mounting the terahertz device whose active region is positioned at an opening region formed at the center of the device substrate, and electrically connecting the terahertz device and an external terminal to each other; a ball lens block arranged and fixed to an upper part of the terahertz device; and upper and lower cases receiving the device substrate mounted with the terahertz device therein and opening region vertical upper and lower portions of the active region of the terahertz device.Type: GrantFiled: July 21, 2008Date of Patent: July 13, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Sang Kuk Choi, Kwang Yong Kang, Mun Cheol Paek, Min Hwan Kwak
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Publication number: 20100155605Abstract: Provided are a terahertz wave transmission and reception (Tx/Rx) module package and method of manufacturing the same. The complete and separate terahertz wave Tx/Rx module package is implemented by simply aligning a silicon ball lens, a photoconductive antenna and a focusing lens, and thus facilitates generation or measurement of a terahertz wave. The terahertz wave Tx/Rx module package and method can remarkably reduce time and cost required to build a terahertz wave generation and measurement system, and simplify and miniaturize the terahertz wave generation and measurement system. In addition, characteristics of a terahertz wave generated by the photoconductive antenna can be simply measured. Furthermore, the terahertz wave Tx/Rx module package can be stored and transported with a photoconductive antenna, a silicon ball lens and a focusing lens kept aligned as they are, and also it is possible to minimize pollution of terahertz wave devices caused by surroundings.Type: ApplicationFiled: August 7, 2009Publication date: June 24, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sang Kuk CHOI, Kwang Yong KANG, Mun Cheol Paek, Min Hwan KWAK, Seung Beom KANG
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Publication number: 20100134372Abstract: Provided is a folded dipole antenna including a meander line formed on a photoconductive substrate, characterized by an input impedance of several k?, which is much higher than that of a conventional dipole antenna, due to optimization of a horizontal length, a line interval, a width, and a line number of the meander line. Accordingly, use of the folded dipole antenna greatly improves an impedance matching characteristic between the antenna and a photomixer having an output impedance of 10 k? or more, and accordingly an output of a THz continuous wave.Type: ApplicationFiled: July 7, 2009Publication date: June 3, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Han Cheol Ryu, Kwang Yong Kang, Min Hwan Kwak, Sung Il Kim
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Publication number: 20100092183Abstract: A frequency tunable terahertz continuous wave generator controls the number of feedbacks of an optical signal output from an optical intensity modulator by adding a feedback loop between input and output terminals of the optical intensity modulator, thereby simply tuning a frequency of a terahertz continuous wave.Type: ApplicationFiled: June 30, 2009Publication date: April 15, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sungil Kim, Kwang Yong Kang, Mun Cheol Paek, Sang Kuk Choi, Min Hwan Kwak, Han Cheol Ryu
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Patent number: 7692516Abstract: Provided are a phase shifter with a photonic band gap (PBG) structure using a ferroelectric thin film. The phase shifter includes a microstrip transmission line acting as a microwave input/output line and a plurality of tunable capacitors arranged in the microstrip transmission line at regular intervals. Electrodes disposed on a substrate apply DC voltages to the plurality of tunable capacitors. Radio frequency (RF) chokes and quarter wavelength radial-stubs are connected between the electrodes and the microstrip transmission line in order to prevent high frequency signals from flowing into a DC bias terminal. A plurality of PBGS are periodically arrayed on a ground plane of the substrate.Type: GrantFiled: December 20, 2005Date of Patent: April 6, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Young-Tae Kim, Han-Cheol Ryu, Min-Hwan Kwak, Seung-Eon Moon, Su-Jae Lee, Kwang-Yong Kang
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Patent number: 7684023Abstract: An apparatus and method for generating a terahertz (THz) wave are provided. The apparatus comprises: an fiber optic probe injecting an optical wave transmitted through an optical fiber into a device under test (DUT); a driving oscillator generating and injecting an electrical wave into the DUT; and the device under test (DUT) generating a THz wave using the produced optical and electrical waves.Type: GrantFiled: June 7, 2007Date of Patent: March 23, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Kwang Yong Kang, Mun Cheol Paek, Doo Hyeb Youn, Min Hwan Kwak, Suk Gil Han
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Publication number: 20090152699Abstract: There is provided a packaging apparatus of a terahertz device, the apparatus including: a terahertz device having an active region at which terahertz wave is radiated or detected; a device substrate mounting the terahertz device whose active region is positioned at an opening region formed at the center of the device substrate, and electrically connecting the terahertz device and an external terminal to each other; a ball lens block arranged and fixed to an upper part of the terahertz device; and upper and lower cases receiving the device substrate mounted with the terahertz device therein and opening region vertical upper and lower portions of the active region of the terahertz device.Type: ApplicationFiled: July 21, 2008Publication date: June 18, 2009Applicant: Electronics and Telecommunications Research InstituteInventors: Sang Kuk CHOI, Kwang Yong Kang, Mun Cheol Paek, Min Hwan Kwak
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Publication number: 20080137093Abstract: An apparatus and method for generating a terahertz (THz) wave are provided. The apparatus comprises: an fiber optic probe injecting an optical wave transmitted through an optical fiber into a device under test (DUT); a driving oscillator generating and injecting an electrical wave into the DUT; and the device under test (DUT) generating a THz wave using the produced optical and electrical waves.Type: ApplicationFiled: June 7, 2007Publication date: June 12, 2008Applicant: Electronic and Telecommunications Research InstituteInventors: Kwang Yong Kang, Mun Cheol Paek, Doo Hyeb Youn, Min Hwan Kwak, Suk Gil Han
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Publication number: 20080116995Abstract: Provided are a phase shifter with a photonic band gap (PBG) structure using a ferroelectric thin film. The phase shifter includes a microstrip transmission line acting as a microwave input/output line and a plurality of tunable capacitors arranged in the microstrip transmission line at regular intervals. Electrodes disposed on a substrate apply DC voltages to the plurality of tunable capacitors. Radio frequency (RF) chokes and quarter wavelength radial-stubs are connected between the electrodes and the microstrip transmission line in order to prevent high frequency signals from flowing into a DC bias terminal. A plurality of PBGS are periodically arrayed on a ground plane of the substrate.Type: ApplicationFiled: December 20, 2005Publication date: May 22, 2008Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Young-Tae Kim, Han-Cheol Ryu, Min-Hwan Kwak, Seung-Eon Moon, Su-Jae Lee, Kwang-Yong Kang