Patents by Inventor Sung Yool Choi

Sung Yool 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: 20070072336
    Abstract: Provided is a method of manufacturing a nano size-gap electrode device. The method includes the steps of: disposing a floated nano structure on a semiconductor layer; forming a mask layer having at least one opening pattern to intersect the nano structure; and depositing a metal on the semiconductor layer exposed through the opening pattern to form an electrode, such that a nano size-gap is provided under the nano structure by the nano structure.
    Type: Application
    Filed: June 6, 2006
    Publication date: March 29, 2007
    Inventors: Han Young Yu, In Bok Baek, Chang Geun Ahn, Ki Ju Im, Jong Heon Yang, Ung Hwan Pi, Min Ki Ryu, Chan Woo Park, Sung Yool Choi, Seong Jae Lee
  • Patent number: 7138331
    Abstract: Provided is a method for manufacturing a nano-gap electrode device comprising the steps of: forming a first electrode on a substrate; forming a spacer on a sidewall of the first electrode; forming a second electrode on an exposed substrate at a side of the spacer; and forming a nano-gap between the first electrode and the second electrode by removing the spacer, whereby it is possible to control the nano-gap position, width, shape, and etc., reproducibly, and manufacture a plurality of nano-gap electrode devices at the same time.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: November 21, 2006
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chan Woo Park, Sung Yool Choi, Sang Ouk Ryu, Han Young Yu, Ung Hwan Pi, Tae Hyoung Zyung
  • Publication number: 20060131574
    Abstract: Provided are a nanowire sensor and a method of manufacturing the same. The nanowire sensor includes: a sensing target system comprising a target element to be detected; two electrodes separated from each other contained in the sensing target system; vanadium oxide (V2O5) nanowires incorporated in the sensing target system and attached to the two electrodes; and a measuring unit for measuring a change in resistance of the nanowires as the nanowires detect the target element.
    Type: Application
    Filed: July 15, 2005
    Publication date: June 22, 2006
    Inventors: Han Young Yu, Ung Hwan Pi, Chan Woo Park, Sung Yool Choi
  • Publication number: 20060102889
    Abstract: Provided is a tri-gated molecular field effect transistor (FET) and a method of fabricating the same. The tri-gated molecular field effect transistor includes a gate electrode formed on a substrate and having grooves in a source region, a drain region and a channel region, and at least one molecule inserted between the source and drain electrodes in the channel region. The effects of the gate voltage on electrons passing through the channel can be maximized, and a variation gain of current supplied between the source and drain electrodes relative to the gate voltage can be greatly increased. Thus, a molecular electronic circuit having high functionality and reliability can be obtained.
    Type: Application
    Filed: May 24, 2005
    Publication date: May 18, 2006
    Inventors: Chan Woo Park, Sung Yool Choi, Han Young Yu, Ung Hwan Pi
  • Patent number: 6815567
    Abstract: The present invention is directed to a novel 4-sulfanylalkyl-3,5-dinitro benzyl alcohol compound and its preparation method, more specifically, derivatives of 4-sulfanylalkyl-3,5-dinitro benzyl alcohol compound having the following formula 1 and its preparation method: wherein, R is hydrogen, alkyl group, or acetyl group, and n is an integer of 1 to 25. The organic compound of the present invention can be used as a material for molecular electronic device.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: November 9, 2004
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hyoyoung Lee, Mun Seok Jeong, Sung Yool Choi, Tae Hyoung Zyung
  • Publication number: 20040147786
    Abstract: The present invention is directed to a novel 4-sulfanylalkyl-3,5-dinitro benzyl alcohol compound and its preparation method, more specifically, derivatives of 4-sulfanylalkyl-3,5-dinitro benzyl alcohol compound having the following formula 1 and its preparation method: 1
    Type: Application
    Filed: December 5, 2003
    Publication date: July 29, 2004
    Inventors: Hyoyoung Lee, Mun Seok Jeong, Sung Yool Choi, Tae Hyoung Zyung
  • Patent number: 6648712
    Abstract: A triode-type field emission device includes an insulating substrate; a cathode formed on the insulating substrate; a field emitter aligned on the cathode, wherein the field emitter includes a plurality of emitter tips and each emitter tip has the diameter of nanometers; an insulating layer positioned around the field emitter for electrically isolating the field emitter; and a gate electrode formed on the insulating layer, wherein the gate electrode is closed to an upper portion of the field emitter. Therefore, the triode-type field emission device may be operable in a low voltage.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: November 18, 2003
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung-Yool Choi, Mun-Cheol Paek, Kyoung-Ik Cho, Jeen Hur, Gi-Pyung Han
  • Patent number: 6605894
    Abstract: A field emission device using carbon nanotubes grown in a direction parallel to a substrate and a method of manufacturing a high definition field emission display using an edge emitting luminescent thin film. The device includes a process of selectively depositing a metal catalyst on a sidewall of the pattern to grow the carbon nanotube in a direction parallel to the metal catalyst and a process of attaching the grown carbon nanotube on the main board by application process, so that it can be freely applied in a subsequent process. The device employs a carbon nanotube field emission emitter and an edge emitting in a high fine luminescent body deposited in a thin film type. Thus, a close relationship with the substrate can be maintained due to the horizontally grown carbon nanotubes, a subsequent semiconductor process can be freely applied using a thin film type luminescent body, and a high fine field emission display can be thus manufactured.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: August 12, 2003
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung Yool Choi, Kyoung Ik Cho
  • Publication number: 20030122133
    Abstract: The present invention relates to a semiconductor device using a single carbon nanotube and a method of manufacturing the same. In a process of manufacturing a bipolar transistor using a p-n junction, a given region of a single carbon nanotube of a N type is exposed by means of a common semiconductor manufacturing process and the exposed portion of a carbon nanotube of a P type is then made to be a carbon a single carbon nanotube of a N type by means of a doping process, thus forming a P-N-P or N-P-N bipolar transistor. Therefore, the present invention can improve the integration degree and the operating speed of the device.
    Type: Application
    Filed: May 20, 2002
    Publication date: July 3, 2003
    Inventors: Sung Yool Choi, Yong Sung Yoon, Seong Deok Ahn, Yoon Ho Song, Jin Ho Lee, Kyoung Ik Cho
  • Publication number: 20030054723
    Abstract: A triode-type field emission device includes an insulating substrate; a cathode formed on the insulating substrate; a field emitter aligned on the cathode, wherein the field emitter includes a plurality of emitter tips and each emitter tip has the diameter of nanometers; an insulating layer positioned around the field emitter for electrically isolating the field emitter; and a gate electrode formed on the insulating layer, wherein the gate electrode is closed to an upper portion of the field emitter. Therefore, the triode-type field emission device may be operable in a low voltage.
    Type: Application
    Filed: October 2, 2002
    Publication date: March 20, 2003
    Inventors: Sung-Yool Choi, Mun-Cheol Paek, Kyoung-Ik Cho, Jeen Hur, Gi-Pyung Han
  • Patent number: 6472802
    Abstract: A triode-type field emission device includes an insulating substrate; a cathode formed on the insulating substrate; a field emitter aligned on the cathode, wherein the field emitter includes a plurality of emitter tips and each emitter tip has the diameter of nanometers; an insulating layer positioned around the field emitter for electrically isolating the field emitter; and a gate electrode formed on the insulating layer, wherein the gate electrode is closed to an upper portion of the field emitter. Therefore, the triode-type field emission device may be operable in a low voltage.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: October 29, 2002
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung-Yool Choi, Mun-Cheol Paek, Kyoung-Ik Cho, Jeen Hur, Gi-Pyung Han
  • Publication number: 20020067114
    Abstract: A field emission device using carbon nanotubes grown in a direction parallel to a substrate and a method of manufacturing a high definition field emission display using an edge emitting luminescent thin film. The device includes a process of selectively depositing a metal catalyst on a sidewall of the pattern to grow the carbon nanotube in a direction parallel to the metal catalyst and a process of attaching the grown carbon nanotube on the main board by application process, so that it can be freely applied in a subsequent process. The device employs a carbon nanotube field emission emitter and an edge emitting in a high fine luminescent body deposited in a thin film type. Thus, a close relationship with the substrate can be maintained due to the horizontally grown carbon nanotubes, a subsequent semiconductor process can be freely applied using a thin film type luminescent body, and a high fine field emission display can be thus manufactured.
    Type: Application
    Filed: May 31, 2001
    Publication date: June 6, 2002
    Inventors: Sung Yool Choi, Kyoung Ik Cho
  • Patent number: 6204608
    Abstract: A field emission display device is disclosed. The device comprises an upper plate and a lower plate that are vacuum-packaged in parallel, wherein the lower plate is composed of matrix-addressable pixels, wherein the pixel formed on an insulation substrate comprises a field emitter array, a control thin-film transistor having a drain connected to an emitter electrode of the emitter array, and an addressing thin-film transistor having a drain connected to a gate electrode of the control thin-film transistor. Designing the control thin-film transistor to have a large parasitic capacitance between the source and the gate, one can obtain an active matrix display having a memory function and eliminate a conventional complex fabricating process of a memory capacitor, thereby simplify a panel fabricating process remarkably and largely increase the aperture ratio of a pixel.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: March 20, 2001
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yoon Ho Song, Jin Ho Lee, Seung Youl Kang, Sung Yool Choi, Kyoung Ik Cho