Patents by Inventor Ju-Tae Choi

Ju-Tae 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).

  • Patent number: 11961775
    Abstract: In one example, a semiconductor device can comprise a substrate, a device stack, first and second internal interconnects, and an encapsulant. The substrate can comprise a first and second substrate sides opposite each other, a substrate outer sidewall between the first substrate side and the second substrate side, and a substrate inner sidewall defining a cavity between the first substrate side and the second substrate side. The device stack can be in the cavity and can comprise a first electronic device, and a second electronic device stacked on the first electronic device. The first internal interconnect can be coupled to the substrate and the device stack. The encapsulant can cover the substrate inner sidewall and the device stack and can fill the cavity. Other examples and related methods are disclosed herein.
    Type: Grant
    Filed: November 8, 2022
    Date of Patent: April 16, 2024
    Assignee: Amkor Technology Singapore Holding Pte. Ltd.
    Inventors: Gyu Wan Han, Won Bae Bang, Ju Hyung Lee, Min Hwa Chang, Dong Joo Park, Jin Young Khim, Jae Yun Kim, Se Hwan Hong, Seung Jae Yu, Shaun Bowers, Gi Tae Lim, Byoung Woo Cho, Myung Jea Choi, Seul Bee Lee, Sang Goo Kang, Kyung Rok Park
  • Publication number: 20240084025
    Abstract: Provided is a method for purifying an anti-4-1BB/anti-HER2 bispecific antibody, the method of which includes carrying out affinity chromatography with a sodium acetate buffer containing a certain inorganic salt as an elution buffer. The purification method of the presently claimed subject matter increases the elution of an antibody in the intact form, thereby being able to provide an anti-4-1BB/anti-HER2 bispecific antibody in the intact form in high purity and high yield.
    Type: Application
    Filed: January 21, 2022
    Publication date: March 14, 2024
    Applicant: YUHAN CORPORATION
    Inventors: Ju-Young PARK, Sung-Hyun CHOI, Yun-Hee CHOI, Won-Tae KIM
  • Patent number: 9751126
    Abstract: The present invention provides a method for controlling the surface quality of an ultra-low carbon steel slab, the method comprising the steps of: measuring the phosphorus (P) concentration, sulfur (S) concentration and superheating degree of a molten steel which is introduced into a mould in a continuous casting process for producing the ultra-low carbon steel slab, the width of the mould, and the casting speed of the slab; and calculating the depth of a hook which is formed when the molten steel is solidified into the slab, based on the measured width of the mould, the measured phosphorus (P) concentration, sulfur (S) concentration and superheating degree of the molten steel, and the measured casting speed of the slab.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: September 5, 2017
    Assignee: Hyundai Steel Company
    Inventors: Hae Young Seo, Suk Hyun Yoo, Hyo Joong Kwon, Yeong Joo Do, Kae Young Lee, Ju Tae Choi
  • Patent number: 9709515
    Abstract: The present invention relates to a system and method for diagnosing cracking in a solidified shell in a mold, in which whether longitudinal cracking has occurred in the solidified shell can be diagnosed in real time by using a variation in temperature of the solidified shell in the mold during a continuous casting process. The system comprises: a plurality of temperature sensors arranged in a matrix form in a mold, wherein the plurality of temperature sensors are divided into a first group and a second group based on where cracking occurs; and a processor configured to: calculate a temperature difference between the temperature of the first group and the temperature of the second group from the temperatures detected by the plurality of temperature sensors; and determine, using the calculated temperature difference, whether cracking has occurred in a solidified shell discharged from the mold.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: July 18, 2017
    Assignee: Hyundai Steel Company
    Inventors: Hyo Joong Kwon, Yong Hee Kim, Hong Kil Moon, Ju Tae Choi, Tae Jun Ha
  • Publication number: 20160008876
    Abstract: The present invention provides a method for controlling the surface quality of an ultra-low carbon steel slab, the method comprising the steps of: measuring the phosphorus (P) concentration, sulfur (S) concentration and superheating degree of a molten steel which is introduced into a mould in a continuous casting process for producing the ultra-low carbon steel slab, the width of the mould, and the casting speed of the slab; and calculating the depth of a hook which is formed when the molten steel is solidified into the slab, based on the measured width of the mould, the measured phosphorus (P) concentration, sulfur (S) concentration and superheating degree of the molten steel, and the measured casting speed of the slab.
    Type: Application
    Filed: December 26, 2013
    Publication date: January 14, 2016
    Inventors: Hae Young Seo, Suk Hyun Yoo, Hyo Joong Kwon, Yeong Joo Do, Kae Young Lee, Ju Tae Choi
  • Patent number: 8343367
    Abstract: Disclosed is a method of forming a continuous channel for gas discharge in the surface of a casting roll for twin roll strip casting, and particularly, a method of forming a continuous channel for gas discharge on the surface of a casting roll for twin roll strip casting, suitable for the formation of dimples on the surface of a casting roll for a twin roll strip caster, which includes applying a photoresist on the entire surface of a casting roll, conducting patterning on the applied photoresist, developing the surface of the casting roll, subjected to the patterning, and etching the metal surface of the casting roll, exposed in the developing, and which prevents the generation of dents, enables the manufacture of a cast product having no defects, and realizes wide applicability not only to high Mn steel but also to types of casting steel capable of generating dents or similar defects due to a large amount of volatile gas.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: January 1, 2013
    Assignee: POSCO
    Inventors: Ju-Tae Choi, Man-Jin Ha, Hee-Kyung Moon
  • Publication number: 20100000968
    Abstract: Disclosed is a method of forming a continuous channel for gas discharge in the surface of a casting roll for twin roll strip casting, and particularly, a method of forming a continuous channel for gas discharge on the surface of a casting roll for twin roll strip casting, suitable for the formation of dimples on the surface of a casting roll for a twin roll strip caster, which includes applying a photoresist on the entire surface of a casting roll, conducting patterning on the applied photoresist, developing the surface of the casting roll, subjected to the patterning, and etching the metal surface of the casting roll, exposed in the developing, and which prevents the generation of dents, enables the manufacture of a cast product having no defects, and realizes wide applicability not only to high Mn steel but also to types of casting steel capable of generating dents or similar defects due to a large amount of volatile as.
    Type: Application
    Filed: July 26, 2007
    Publication date: January 7, 2010
    Inventors: Ju-Tae Choi, Man-Jin Ha, Hee-Kyung Moon
  • Publication number: 20090321035
    Abstract: Disclosed is a casting roll for a twin roll strip caster, and particularly, a casting roll for a twin roll strip caster, in which a continuous gas channel, for preventing the generation of dents in the surface of a strip when casting TWIP steel in order to improve the mechanical properties of the strip, including increasing the tensile strength and elongation, is formed in the surface of the casting roll, thus discharging gas mixed when the strip is cast, thereby preventing the generation of dents in the surface of the strip when casting the TWIP steel, in particular, a continuous gas channel is formed, thereby decreasing a conventional dent index and discouraging the generation of dents.
    Type: Application
    Filed: July 26, 2007
    Publication date: December 31, 2009
    Applicant: POSCO CO., LTD.
    Inventors: Man-Jin Ha, Seong-In Jeong, Ju-Tae Choi, Wan-Soo Kim, Tae-Wook Kang, Oh-Duck Kwon
  • Patent number: 7323135
    Abstract: An apparatus for controlling gas layer thickness on the surface of casting rolls in a twin roll strip caster includes: a pair of chambers fixedly mounted on both lateral portions of the meniscus shield in a width direction of a strip; blocking units for blocking introduction of pollutants into the molten metal pool, wherein each of the blocking units includes front and rear barrier members which are mounted on each of the chambers and in close contact with an outer periphery of each casting roll and a blower for injecting inert gas toward the outer periphery of each casting roll; operating units for adjusting the thickness and the width of gas layers at both ends of the casting rolls, wherein each of the operating units includes suction lines connected with each chamber to transmit a suction force to ends of each casting roll and a pair of movable plates slidably assembled to both side portions within each chamber for being reciprocated by movable members; and a control unit for controlling the suction force
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: January 29, 2008
    Assignees: POSCO, Research Institute of Industrial Science & Technology
    Inventors: Ju-Tae Choi, Han-Nam Cheong, Kyung-Ah Lee, legal representative, Yong-Gi Lee, deceased
  • Publication number: 20050253314
    Abstract: An apparatus for controlling gas layer thickness on the surface of casting rolls in a twin roll strip caster includes: a pair of chambers fixedly mounted on both lateral portions of the meniscus shield in a width direction of a strip; blocking units for blocking introduction of pollutants into the molten metal pool, wherein each of the blocking units includes front and rear barrier members which are mounted on each of the chambers and in close contact with an outer periphery of each casting roll and a blower for injecting inert gas toward the outer periphery of each casting roll; operating units for adjusting the thickness and the width of gas layers at both ends of the casting rolls, wherein each of the operating units includes suction lines connected with each chamber to transmit a suction force to ends of each casting roll and a pair of movable plates slidably assembled to both side portions within each chamber for being reciprocated by movable members; and a control unit for controlling the suction force
    Type: Application
    Filed: December 20, 2002
    Publication date: November 17, 2005
    Inventors: Ju-Tae Choi, Han-Nam Cheong, Yong-Gi Lee