Patents by Inventor Tae Ahn

Tae Ahn 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: 20080079076
    Abstract: A semiconductor device includes a semiconductor substrate having an active region which includes a gate forming zone and an isolation region; an isolation layer formed in the isolation region of the semiconductor substrate to expose side surfaces of a portion of the active region including the gate forming zone, such that the portion of the active region including the gate forming zone constitutes a fin pattern; a silicon epitaxial layer formed on the active region including the fin pattern; and a gate formed to cover the fin pattern on which the silicon epitaxial layer is formed.
    Type: Application
    Filed: July 12, 2007
    Publication date: April 3, 2008
    Inventors: Dong Sun SHEEN, Sang Tae AHN, Seok Pyo SONG, Hyeon Ju AN
  • Patent number: 7326210
    Abstract: A flexible connection unit for use in a spinal fixation device, includes: a longitudinal member having first and second ends; at least one spacer located between the first and second ends, wherein the at least one spacer comprises a first portion made from a first material and a second portion made from a second material; and at least one flexible member located in a longitudinal axial channel of the at least one spacer, wherein the first and second ends substantially limit motion of the at least one spacer in the longitudinal axial direction with respect to the at least one flexible member.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: February 5, 2008
    Assignee: N Spine, Inc
    Inventors: Tae-ahn Jahng, Jason Yim, Brian Bowman
  • Publication number: 20080001249
    Abstract: An isolation structure of a semiconductor device is formed by forming a hard mask layer on a semiconductor substrate having active and field regions to expose the field region. A trench is defined by etching the exposed field region of the semiconductor substrate using the hard mask as an etch mask. An SOG layer is formed in the trench partially filling the trench. An amorphous aluminum oxide layer is formed on the resultant substrate including the SOG layer. An HDP layer is formed on the amorphous aluminum oxide layer to completely fill the trench. The HDP layer and the amorphous aluminum oxide layer are subjected to CMP to expose the hard mask. The hard mask and portions of the amorphous aluminum oxide layer that are formed on the HDP layer are removed. The amorphous aluminum oxide layer is crystallized.
    Type: Application
    Filed: December 29, 2006
    Publication date: January 3, 2008
    Inventors: Dong Sun Sheen, Seok Pyo Song, Sang Tae Ahn, Hyeon Ju An
  • Publication number: 20070281454
    Abstract: A method for manufacturing a semiconductor device is disclosed. The method includes the steps of defining a trench into a field region of a semiconductor substrate having an active region and the field region; partially filing the trench with a flowable insulation layer; completely filling the trench with an isolation structure by depositing a close-packed insulation layer on the flowable insulation layer in the trench; etching through a portion of the close-packed insulation layer and etching into a partial thickness of the flowable insulation layer of the insulation structure to expose a portion of the active region; cleaning the resultant substrate having the active region relatively projected; forming spacers on etched portions of the flowable insulation layer where bowing occurs during the cleaning step; and forming gates on the active region and the insulation structure to border the exposed portion of the active region.
    Type: Application
    Filed: December 29, 2006
    Publication date: December 6, 2007
    Inventors: Dong Sun Sheen, Seok Pyo Song, Sang Tae Ahn, Hyeon Ju An, Hyun Chul Sohn
  • Publication number: 20070276380
    Abstract: A flexible connection unit for use in a spinal fixation device that includes: a longitudinal member having first and second ends and a flexible member interposed between the first and second ends, at least one of the first end and second end configured to be engaged by a first bone securing member; and at least one spacer located between the first and second ends, the spacer comprising a resilient element and a ring element encircling at least a portion of the resilient element, wherein the ring element is configured to be engaged by a second bone securing member.
    Type: Application
    Filed: February 13, 2007
    Publication date: November 29, 2007
    Inventors: Tae-ahn Jahng, Jason Yim, Brian Bowman
  • Publication number: 20070256767
    Abstract: Disclosed is a steel wire for cold forging, which has excellent low temperature impact properties, and a method of producing the same. The steel wire consists of 0.10-0.40 wt % C, 1.0 wt % or less of Si, 0.30 - 2.0 wt % Mn, 0.03 wt % or less of P, 0.03 wt % or less of S, and the balance of Fe and impurities. The steel wire has an austenite grain size of 5-20 ?m, impact absorption energy of 60 J/cm2 or more at ?40° C., and tensile strength of 70-130 kgf/mm2. A steel material for cold forming according present invention has impact toughness that is greatly superior to a conventional spheroidized material or non-heat treated steel at a low temperature of ?40° C.
    Type: Application
    Filed: November 29, 2004
    Publication date: November 8, 2007
    Applicant: SAMHWA STEEL CO., LTD.
    Inventor: Soon-Tae Ahn
  • Publication number: 20070225710
    Abstract: A flexible connection unit for use in a spinal fixation device, including: a longitudinal member having first end portion, a second end portion and a flexible member interposed between the first end portion and the second end portion, at least one of the first end portion and the second end portion configured to be coupled to a first bone securing member; and a spacer located between the first and second end portions, wherein at least a portion of the flexible member passes through an axial channel of the spacer and wherein the spacer comprises a resilient element configured to be coupled to a second bone securing member.
    Type: Application
    Filed: February 13, 2007
    Publication date: September 27, 2007
    Inventors: Tae-ahn Jahng, Jason Yim, Brian Bowman
  • Publication number: 20070148840
    Abstract: A fin transistor is formed by forming a hard mask layer on a substrate having an active region and a field region. The hard mask layer is etched to expose the field region. A trench is formed by etching the exposed field region. The trench is filled with an SOG layer. The hard mask layer is removed to expose the active region. An epi-silicon layer is formed on the exposed active region. The SOG layer is then partially etched from the upper end of the trench, thus filling a lower portion of the trench. A HDP oxide layer is deposited on the etched SOG layer filling the trench, thereby forming a field oxide layer composed of the SOG layer and the HDP oxide. The HDP oxide layer in the field oxide layer is etched to expose both side surfaces of the epi-silicon layer. A gate is then formed on the epi-silicon layer of which both side surfaces are exposed and the field oxide layer.
    Type: Application
    Filed: November 8, 2006
    Publication date: June 28, 2007
    Inventors: Dong Sun Sheen, Seok Pyo Song, Sang Tae Ahn, Hyun Chul Sohn
  • Publication number: 20070132364
    Abstract: A light emitting device comprises a first pixel portion that includes a light emitting portion arranged between two electrodes on a first substrate, a transistor portion formed on a second substrate arranged to be opposed to the first substrate, a connection electrode extended from one of the two electrodes, and an electrical contact portion in surface contact with both the connection electrode and a drain of the transistor portion.
    Type: Application
    Filed: June 12, 2006
    Publication date: June 14, 2007
    Inventors: Tae Ahn, Hong Lee
  • Publication number: 20070123871
    Abstract: A flexible connection unit for spinal stabilization, including: a first end portion having a first longitudinal channel and configured to be coupled to a first securing member secured to a patient's spine; a second end portion having a second longitudinal channel and configured to be coupled to a second securing member secured to the patient's spine; and a flexible wire extending through at least a portion of the first and second longitudinal channels and flexibly linking the first and second end portions.
    Type: Application
    Filed: January 4, 2007
    Publication date: May 31, 2007
    Inventor: Tae-Ahn Jahng
  • Publication number: 20070100080
    Abstract: The present invention relates to a method and an apparatus for the production of polyvinyl alcohol, and more precisely, a method and an apparatus for the production of polyvinyl alcohol in which the saponification of a mixture of polyvinyl ester solution and a catalyst is induced in a reactor equipped with a planetary stirrer coated with one or more coating agents selected from a group consisting of fluororesin, silicon resin and epoxy resin. According to the present invention, the method and apparatus of the present invention have advantages for the production of polyvinyl alcohol such as inhibiting gelation during the conversion of polyvinyl ester into polyvinyl alcohol, thereby enabling the preparation of polyvinyl alcohol with a high degree of saponification, a high degree of polymerization and high apparent gravity, reducing the amount of a solvent used and thereby requiring a smaller reactor, resulting in the reduction of the apparatus cost and the solvent recovery cost.
    Type: Application
    Filed: October 23, 2006
    Publication date: May 3, 2007
    Applicant: LG CHEM, LTD.
    Inventors: Sam-hun YUN, Seon-wook KIM, Jeong-seok LEE, Sung-tae AHN
  • Publication number: 20070055247
    Abstract: A method and system for marking and guiding the insertion of securing members (e.g., pedicle screws) of a spinal fixation device.
    Type: Application
    Filed: November 10, 2006
    Publication date: March 8, 2007
    Applicant: N Spine, Inc.
    Inventor: Tae-Ahn Jahng
  • Publication number: 20070027256
    Abstract: The present invention relates to an acrylic rubber-modified copolymer and the styrenic thermoplastics composition using the same. More particularly, the present invention relates to the styrenic thermoplastics composition having superior appearance and thermoformability, which is obtained by adding 0.5-20 parts by weight of an acrylic rubber-modified copolymer having a rubber particle size ranging from 800 to 6, 000 ?to 100 parts by weight of a resin of 10-50 parts by weight of a graft copolymer comprising rubber-modified styrene and 30-70 parts by weight of a copolymer comprising styrene.
    Type: Application
    Filed: October 8, 2004
    Publication date: February 1, 2007
    Applicant: LG CHEM. LTD.
    Inventors: Dong-chul Kim, Chan-hong Lee, Sung-je Cha, Yun-kyoung Cho, Sung-tae Ahn
  • Patent number: 7166519
    Abstract: The present invention relates to a method for isolating semiconductor devices. The method includes the steps of: forming a patterned pad nitride layer pattern to open at least one isolation region on the substrate; forming a first trench and a second trench by etching the exposed substrate; depositing a first oxide layer to fill the first trench by performing an atomic layer deposition (ALD) method; etching a portion of the first oxide layer which is filled into the wide trench; and depositing a second oxide layer by performing a deposition method.
    Type: Grant
    Filed: June 12, 2004
    Date of Patent: January 23, 2007
    Assignee: Hynix Semiconductor Inc.
    Inventors: Sang-Tae Ahn, Dong-Sun Sheen, Seok-Pyo Song
  • Publication number: 20070006947
    Abstract: Disclosed is a steel wire for cold forging, which has excellent low temperature impact properties, and a method of producing the same. The steel wire consists of 0.10-0.40 wt % C, 1.0 wt % or less of Si, 0.30-2.0 wt % Mn, 0.03 wt % or less of P, 0.03 wt % or less of S, and the balance of Fe and impurities. The steel wire has an austenite grain size of 5-20 ?m, impact absorption energy of 60 J/cm2 or more at ?40° C., and tensile strength of 70-130 kgf/mm2. A steel material for cold forming according to the present invention has impact toughness that is greatly superior to a conventional spheroidized material or non-heat treated steel at a low temperature of ?40° C.
    Type: Application
    Filed: June 16, 2006
    Publication date: January 11, 2007
    Inventor: Soon-Tae Ahn
  • Patent number: 7142740
    Abstract: Provided is a planar lightwave circuit (PLC) type optical transceiver module, in which for a diplex optical transceiver module that uses different wavelengths in upstream and downstream, an optical waveguide connected to a light-receiving unit is a multi-mode waveguide and an optical waveguide connected to the light-emitting unit is a single mode waveguide, and further, for a triplex optical transceiver module that uses one upstream wavelength and more than two different downstream wavelengths, an optical waveguide connected to the light-receiving unit, which is a waveguide-type photo diode, is a multi-mode waveguide and an optical waveguide connected to the light-emitting unit is a single mode waveguide, whereby even when there is an alignment error of a thin film filter due to irregularity provided in forming a trench, the optical waveguide connected to the light-receiving unit is formed wider than the optical waveguide connected to the light-emitting unit so that the loss during transmission of the optical
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: November 28, 2006
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jong Moo Lee, Sun Tak Park, Joon Tae Ahn, Yong Soon Baek
  • Patent number: 7137985
    Abstract: A method and system for marking and guiding the insertion of securing members (e.g., pedicle screws) of a spinal fixation device.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: November 21, 2006
    Assignee: N Spine, Inc.
    Inventor: Tae-ahn Jahng
  • Patent number: 7133195
    Abstract: Provided is a gain-clamped fiber amplifier for amplifying the magnitude of an input optical signal in an optical communication system. The gain-clamped fiber amplifier includes a first amplifier for amplifying a predetermined optical signal and a second amplifier for compensating for a noise figure characteristic of the first amplifier and for separating remaining pumping light whose intensity changes in accordance with an optical signal. Therefore, it is possible to improve the noise figure and dynamic range characteristics and the performance of the amplifier.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: November 7, 2006
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Joon Tae Ahn, Hong Seok Seo, Woon Jin Chung, Bong Je Park
  • Publication number: 20060215975
    Abstract: Disclosed herein is an apparatus for measuring the differential mode delay of multimode optical fiber. The apparatus includes a tunable laser source, an interferometer, a data collecting device, and a computer. The tunable laser source outputs light, frequencies of which vary linearly. The interferometer generates multimode light and single mode light by separating light, which is output from the tunable laser source, transmitting the multimode light and the single mode light to the multimode optical fiber, which is a measurement target, and a single mode path, which is a reference, and generating a beating signal by causing the multimode light and the single mode light to interfere with each other. The data collecting device collects the beating signal from the interferometer. The computer converts the frequency components of the beating signal into components in a time domain, and calculating the mode delay of the multimode light.
    Type: Application
    Filed: March 23, 2006
    Publication date: September 28, 2006
    Inventors: Dug Kim, Tae Ahn
  • Patent number: D548748
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: August 14, 2007
    Assignee: LG Electronics Inc.
    Inventor: Hyun Tae Ahn