Patents by Inventor Yong Cheol Chu

Yong Cheol Chu 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: 10661394
    Abstract: Disclosed is a metal core solder ball having improved heat conductivity, including a metal core having a diameter of 40˜600 ?m, a first plating layer formed on the outer surface of the metal core, and a second plating layer formed on the outer surface of the first plating layer.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: May 26, 2020
    Assignee: DUKSAN HI-METAL CO., LTD.
    Inventors: Yong Cheol Chu, Hyun Kyu Lee, Jung Ug Kwak, Seung Jin Lee, Sang Ho Jeon, Yong Sik Choi
  • Publication number: 20140183733
    Abstract: Disclosed is a metal core solder ball having improved heat conductivity, including a metal core having a diameter of 40˜600 ?m, a first plating layer formed on the outer surface of the metal core, and a second plating layer formed on the outer surface of the first plating layer.
    Type: Application
    Filed: November 18, 2013
    Publication date: July 3, 2014
    Applicant: DUKSAN HI-METAL CO., LTD
    Inventors: Yong Cheol CHU, Hyun Kyu LEE, Jung Ug KWAK, Seung Jin LEE, Sang Ho JEON, Yong Sik CHOI
  • Publication number: 20120309866
    Abstract: The present invention relates to a solder ink and an electronic device package using the same. The solder ink includes: a solder powder including an alloy including tin (Sn); a binder including a first resin comprising rosin resin or rosin modified resin; an active agent; and a solvent.
    Type: Application
    Filed: March 10, 2010
    Publication date: December 6, 2012
    Applicant: DUK SAN TEKOPIA CO., LTD.
    Inventors: Yong Un Jang, Sung Chul Kim, Yong Cheol Chu, Seung Jun Jang, Yoon Sang Son
  • Publication number: 20120228560
    Abstract: The present invention relates to a conductive adhesive, a method for manufacturing the same, and an electronic device including the same. The conductive adhesive includes: a conductive particle; a low-melting alloy powder including an alloy including Sn and at least one material selected from the group consisting of Ag, Cu, Bi, Zn, In, and Pb; a nano powder; a first binder including a thermosetting resin; and a second binder including a rosin compound.
    Type: Application
    Filed: May 7, 2012
    Publication date: September 13, 2012
    Applicant: Duk San Tekopia Co., Ltd.
    Inventors: Yong Un Jang, Sung Chul Kim, Yong Cheol Chu, Seung Jun Jang, Yoon Sang Son, Soon Ho Joeng
  • Patent number: 8221560
    Abstract: Disclosed herein are a lead-free solder alloy and a manufacturing method thereof. More specifically, disclosed are: a lead-free solder alloy, which comprises 0.8-1.2 wt % silver (Ag), 0.8-1.2 wt % copper (Cu), 0.01-1.0 wt % palladium (Pd), 0.001-0.1 wt % tellurium (Te), and a balance of tin (Sn), and thus has a melting point similar to those of prior lead-free solder alloys, excellent wettability, very low segregation ratio, and excellent weldability with a welding base metal, such that it improves temperature cycle performance and drop impact resistance simultaneously, when it is applied to electronic devices and printed circuit boards; a manufacturing method of the above alloy; and electronic devices and printed circuit boards which include the same.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: July 17, 2012
    Assignee: Duksan Hi-Metal Co., Ltd.
    Inventors: Kang Hee Kim, Yong Cheol Chu, Myoung Ho Chun, Sang Ho Jeon, Hyun Kyu Lee
  • Publication number: 20120067629
    Abstract: The present invention relates to a solder adhesive and a production method for the same, and to an electronic device comprising the same, and more specifically it relates to a solder adhesive comprising an alloy including tin and having a melting point of from 130 to 300° C., a first binder including a rosin compound, and a second binder having a thermosetting resin, as well as to a production method for the same and an electronic device comprising the same.
    Type: Application
    Filed: September 22, 2011
    Publication date: March 22, 2012
    Applicant: DUKSAN HI-METAL CO., LTD.
    Inventors: Yong Un Jang, Sung Chul Kim, Yong Cheol Chu, Seung Jun Jang, Yoon Sang Son
  • Publication number: 20100272598
    Abstract: Disclosed herein are a lead-free solder alloy and a manufacturing method thereof. More specifically, disclosed are: a lead-free solder alloy, which comprises 0.8-1.2 wt % silver (Ag), 0.8-1.2 wt % copper (Cu), 0.01-1.0 wt % palladium (Pd), 0.001-0.1 wt % tellurium (Te), and a balance of tin (Sn), and thus has a melting point similar to those of prior lead-free solder alloys, excellent wettability, very low segregation ratio, and excellent weldability with a welding base metal, such that it improves temperature cycle performance and drop impact resistance simultaneously, when it is applied to electronic devices and printed circuit boards; a manufacturing method of the above alloy; and electronic devices and printed circuit boards which include the same.
    Type: Application
    Filed: September 4, 2008
    Publication date: October 28, 2010
    Applicant: DUKSAN HI-METAL CO., LTD.
    Inventors: Kang Hee Kim, Yong Cheol Chu, Myoung Ho Chun, Sang Ho Jeon, Hyun Kyu Lee