Patents by Inventor Yang-Kyu Choi

Yang-Kyu Choi 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).

  • Publication number: 20080283939
    Abstract: The present invention relates to a Field-Effect Transistor (FET) and, more particularly, to a Dielectric-Modulated Field-Effect Transistor (DMFET) and a method of fabricating the same. A DMFET according to an embodiment of the present invention comprises a substrate in which a source and a drain are formed, wherein the source and the drain are spaced apart from each other, a gate formed on a region between the source and the drain, of the substrate, wherein at least part of the gate is spaced apart from the substrate, biomolecules formed below a region spaced apart from the substrate, of the gate, and a linker for combining the gate and the biomolecules.
    Type: Application
    Filed: January 15, 2008
    Publication date: November 20, 2008
    Inventors: Yang-Kyu Choi, Hyungsoon Im, Bonsang Gu
  • Publication number: 20080277719
    Abstract: The present invention relates to a non-volatile memory cell and a method of fabricating the same. The non-volatile memory cell according to the present invention comprises a substrate, a first oxide film formed over an active region of the substrate, a source and drain formed within the active region, a charge storage unit formed on the first oxide film, a second oxide film configured to surround the charge storage unit and formed on the first oxide film, and a gate formed to surround the second oxide film. According to the non-volatile memory cell and a cell array including the same in accordance with the present invention, the charge storage unit is fully surrounded by the gate or the gate line, thus a disturbance phenomenon that may occur due to the memory operation of cells formed in other neighboring gate or gate line can be minimized.
    Type: Application
    Filed: March 14, 2008
    Publication date: November 13, 2008
    Inventors: Yang-Kyu Choi, Kuk-Hwan Kim
  • Patent number: 7419857
    Abstract: Discloses are a method for manufacturing a field effect transistor comprising a channel consisting of silicon fins and a silicon body, in which the silicon fins have an orientation different from the silicon body, as well as a transistor structure manufactured thereby.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: September 2, 2008
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Yang-Kyu Choi, Hyunjin Lee
  • Publication number: 20080193705
    Abstract: Molecular devices and methods of manufacturing the molecular device are provided. The molecular device may include a lower electrode on a substrate and a self-assembled monolayer on the lower electrode. After an upper electrode is formed on the self-assembled monolayer, the self-assembled monolayer may be removed to form a gap between the lower electrode and the upper electrode. A functional molecule having a functional group may be injected into the gap.
    Type: Application
    Filed: February 12, 2008
    Publication date: August 14, 2008
    Inventors: Dong-Won Kim, Dong-Gun Park, Sung-Young Lee, Yang-Kyu Choi, Lee-Eun Yu
  • Patent number: 7402862
    Abstract: The present invention relates to a multi-bit non-volatile memory device having a dual gate employing local charge trap and method of manufacturing the same, and an operating method for a multi-bit cell operation.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: July 22, 2008
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Yang-Kyu Choi, Hyunjin Lee
  • Publication number: 20070215960
    Abstract: Fabrication methods disclosed herein provide for a nanoscale structure or a pattern comprising a plurality of nanostructures of specific predetermined position, shape and composition, including nanostructure arrays having large area at high throughput necessary for industrial production. The resultant nanostracture patterns are useful for nanostructure arrays, specifically sensor and catalytic arrays.
    Type: Application
    Filed: October 14, 2004
    Publication date: September 20, 2007
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Ji Zhu, Jeff Grunes, Yang-Kyu Choi, Jeffrey Bokor, Gabor Somorjai
  • Publication number: 20070190192
    Abstract: The present invention relates to a composition for the prevention and the treatment of cardiovascular disease containing extracts of T. nucifera or abietane diterpenoid compound or terpenoid compound isolated from the same as an effective ingredient. T. nucifera extracts or abietane diterpenoid compound or terpenoid compound isolated from the same of the present invention not only shows excellent anti-oxidative activity to LDL but also effectively inhibits ACAT activity. Further, T. nucifera extracts of the present invention reduce blood LDL cholesterol and total cholesterol. Therefore, the composition of the present invention can be effectively used for the prevention and the treatment of cardiovascular diseases including hyperlipidemia and atherosclerosis caused by the LDL oxidation and the synthesis and accumulation of cholesteryl ester.
    Type: Application
    Filed: February 22, 2005
    Publication date: August 16, 2007
    Inventors: Tae-Sook Jeong, Woo-Song Lee, Hyoung-Chin Kim, Yang-Kyu Choi, Ju-Ryoung Kim, So-Jin An, Kyoung-Ran Im, Ki-Chang Jang, Og-Sung Moon, Jun-Seock Son
  • Publication number: 20070158697
    Abstract: Provided are a phase change memory device that can operate at low power and improve the scale of integration by reducing a contact area between a phase change material and a bottom electrode, and a method for fabricating the same. The phase change memory comprises a current source electrode, a phase change material layer, a plurality of carbon nanotube electrodes, and an insulation layer. The current source electrode supplies external current to a target. The phase change material layer is disposed to face the current source electrode in side direction. The carbon nanotube electrodes are disposed between the current source electrode and the phase change material layer. The insulation layer is formed outside the carbon nanotube electrodes and functions to reduce the loss of heat generated at the carbon nanotube electrodes.
    Type: Application
    Filed: December 13, 2006
    Publication date: July 12, 2007
    Inventors: Yang-Kyu Choi, Kuk-Hwan Kim
  • Publication number: 20070152248
    Abstract: Provided are a CMOS image sensor and a method for fabricating the same. A nanopillar is plurally formed at an upper end of a light receiving element.
    Type: Application
    Filed: December 6, 2006
    Publication date: July 5, 2007
    Inventors: Yang-Kyu Choi, Kuk-Hwan Kim
  • Publication number: 20070141763
    Abstract: Discloses are a method for manufacturing a field effect transistor comprising a channel consisting of silicon fins and a silicon body, in which the silicon fins have an orientation different from the silicon body, as well as a transistor structure manufactured thereby.
    Type: Application
    Filed: December 20, 2005
    Publication date: June 21, 2007
    Inventors: Yang-Kyu Choi, Hyunjin Lee
  • Publication number: 20060289911
    Abstract: Disclosed is a CMOS image sensor, comprising a photodiode formed in a substrate, a floating diffusion region formed in the substrate in a manner such that it is distanced from the photodiode surrounds the photodiode and a transfer gate formed in a manner such that it is distanced from the photodiode and the floating diffusion region and formed in a boundary area between the photodiode and the floating diffusion region, thereby overlapping the photodiode and the floating diffusion region.
    Type: Application
    Filed: June 22, 2006
    Publication date: December 28, 2006
    Inventors: Sang-Jun Lee, Yang-Kyu Choi, Dong-Yoon Jang
  • Publication number: 20060255392
    Abstract: A transistor including a metal-insulation transition material and a method of manufacturing the same. The transistor including a metal-insulator transition material may include a substrate, a insulation layer formed on the substrate, a source region and a drain region separately formed from each other on the insulation layer, a tunneling barrier layer formed on at least one surface of the source region and the drain region, a metal-insulator transition material layer formed on the tunneling barrier layer and the insulation layer, a dielectric layer stacked on the metal-insulator transition material layer, and a gate electrode layer formed on the dielectric layer.
    Type: Application
    Filed: May 12, 2006
    Publication date: November 16, 2006
    Inventors: Choong-Rae Cho, In-Kyeong Yoo, Yang-Kyu Choi, Sung-Il Cho
  • Publication number: 20060246660
    Abstract: Provided is a flash memory, and more particularly, to a method and structure for erasing flash blocks based on back-bias. The method comprises the steps of forming a flash block on a silicon on insulator (SOI) substrate and forming a body-electrode on back side of the silicon on insulator (SOI) substrate.
    Type: Application
    Filed: April 26, 2006
    Publication date: November 2, 2006
    Inventors: YANG-KYU CHOI, Hyunjin Lee
  • Publication number: 20060237777
    Abstract: The present invention relates to a multi-bit non-volatile memory device having a dual gate employing local charge trap and method of manufacturing the same, and an operating method for a multi-bit cell operation.
    Type: Application
    Filed: April 21, 2006
    Publication date: October 26, 2006
    Inventors: Yang-Kyu Choi, Hyunjin Lee
  • Publication number: 20060208342
    Abstract: The present invention relates to a SON MOSFET and method of manufacturing the same, in which a blister is formed within a silicon substrate, thus improving the disadvantages of a bulk structure and a Silicon-On-Insulator (SOI) structure at the same time. The SON MOSFET according to the present invention comprises isolation insulating films formed at both upper sides of a silicon substrate, a gate insulating film and a gate electrode that are sequentially formed on a surface of the silicon substrate between the isolation insulating films, a source region and a drain region that are formed on the silicon substrate between the gate insulating film and the isolation insulating films, a blister formed within the silicon substrate under the gate insulating film, and a silicon channel, which is surrounded by the blister, the source region and the drain region, within the silicon substrate, wherein the blister is formed of hydrogen or helium ion.
    Type: Application
    Filed: February 1, 2006
    Publication date: September 21, 2006
    Inventors: Yang-Kyu Choi, Dong-Yoon Jang
  • Publication number: 20060154400
    Abstract: The present invention relates to a method of forming a nanogap, a method of manufacturing a nano field effect transistor for a molecular device or a bio-sensor, and a fabrication thereof, and more particularly, to a method of forming a high reproductive nanogap using a thin layer with a molecular size or a size which is similar to that of a molecule and a nano field effect transistor manufactured by the method of forming the nanogap.
    Type: Application
    Filed: January 10, 2006
    Publication date: July 13, 2006
    Inventors: Yang-Kyu Choi, Ju-Hyun Kim
  • Patent number: 6562866
    Abstract: 0A method for treating or preventing an elevated blood lipid level-related disease in a mammal, which comprises administering thereto an effective amount of rutin, quercetin or a mixture thereof.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: May 13, 2003
    Assignee: Korea Research Institute of Bioscience and Biotechnology
    Inventors: Song-Hae Bok, Tae-Sook Jeong, Ki-Hwan Bae, Yong-Bok Park, Myung-Sook Choi, Surk-Sik Moon, Yong-Kook Kwon, Eun-Sook Lee, Byung-Hwa Hyun, Yang-Kyu Choi, Chul-Ho Lee, Sae-Bom Lee, Young-Bae Park, Hyo-Soo Kim
  • Patent number: 6509372
    Abstract: A method for treating or preventing an elevated blood lipid level-related disease in a mammal, which comprises administering thereto an effective amount of rutin, quercetin or a mixture thereof.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: January 21, 2003
    Assignee: Korea Research Institute of Bioscience and Biotechnology
    Inventors: Song-Hae Bok, Tae-Sook Jeong, Ki-Hwan Bae, Yong-Bok Park, Myung-Sook Choi, Surk-Sik Moon, Yong-Kook Kwon, Eun-Sook Lee, Byung-Hwa Hyun, Yang-Kyu Choi, Chul-Ho Lee, Sae-Bom Lee, Young-Bae Park, Hyo-Soo Kim
  • Patent number: 6465019
    Abstract: The present invention relates to a spice composition comprising 1 to 30 % by weight of garlic, 10 to 50% by weight of onion, 0.2 to 10% by weight of ginger, 5 to 40% by weight of jujube, and 10 to 50% by weight of citrus peel or an extract thereof or 1 to 20% by weight of naringin or hesperidin.
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: October 15, 2002
    Assignee: Korea Institute of Science and Technology
    Inventors: Song-Hae Bok, Tae-Sook Jeong, Ki-Hwan Bae, Yong-Bok Park, Myung-Sook Choi, Yong-Kook Kwon, Byung-Hwa Hyun, Yang-Kyu Choi, Chul-Ho Lee, Surk-Sik Moon
  • Patent number: 6455577
    Abstract: A compound of formula (I) treating or preventing an elevated blood lipid level-related disease and inhibiting the activities of acyl-CoA:cholesterol-O-acyltransferase(ACAT) and 3-hydroxy-3-methylglutaryl CoA(HMG-CoA) reductase: wherein, R1 is R5 R6CO group; R2 is H or R6CO group; R3 is H, CH3, R5 or R6CO group; R4 is H, OH, OR5 or R6COO group; R5 is a C2-5 alkyl group substituted with a phenyl group optionally having one or more substituents selected from the group consisting of C1-3 alkyl, OH, Cl and NO2; a C1-5 alkyl group substituted with a naphthyl group optionally having one or more substituents selected from the group consisting of C1-3 alkyl, OH, Cl and NO2; a C10-18 alkyl; or a C10-18 alkenyl group; and R6 is a C10-18 alkenyl group; or an aryl group optionally having one or more substituents selected from the group consisting of C1-3 alkyl, OH, Cl or NO2.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: September 24, 2002
    Assignee: Korea Research Institute of Bioscience and Biotechnology
    Inventors: Song-Hae Bok, Tae-Sook Jeong, Sang-Ku Lee, Ju-Ryong Kim, Surk-Sik Moon, Myung-Sook Choi, Byung-Hwa Hyun, Chul-Ho Lee, Yang-Kyu Choi