Patents by Inventor Du Won Choi

Du Won 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: 20190304686
    Abstract: A dielectric composition contains: a base material powder containing BamTiO3 (0.995?m?1.010); a first accessory ingredient containing at least one element corresponding to a transition metal in Group 5 of the periodic table in a total content of 0.3 to 1.2 moles; a second accessory ingredient containing one of ions, oxides, carbides, and hydrates of Si in a content of 0.6 to 4.5 moles; a third accessory ingredient containing at least one element in Period 4 or higher; and a fourth accessory ingredient containing at least one element in Period 3, wherein 0.70×B?C+D?1.50×B and 0.20?D/(C+D)?0.80, in which B is a total content of the second accessory ingredient, C is a total content of the third accessory ingredient, and D is a total content of the fourth accessory ingredient.
    Type: Application
    Filed: August 28, 2018
    Publication date: October 3, 2019
    Inventors: Sung Hyung KANG, Hyung Kyu KIM, Jong Hyun CHO, Du Won CHOI, Yong Koo KIM, Hang Kyu CHO
  • Patent number: 9666369
    Abstract: There are provided a dielectric ceramic composition and a multilayer ceramic capacitor containing the same. The dielectric ceramic composition according to the present disclosure may contain a main base material ingredient and a first accessory ingredient, wherein the first accessory ingredient contains samarium (Sm) and other rare earth (RE) elements, and a ratio (a/b) of a content (a) of samarium (Sm) to a content (b) of other rare earth elements in the first accessory ingredient satisfies 0.1?a/b?2.0.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: May 30, 2017
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae Sung Park, Chan Hee Nam, Doo Young Kim, Seok Hyun Yoon, Du Won Choi, Chang Hoon Kim
  • Patent number: 9604883
    Abstract: A dielectric composition includes a main ingredient and accessory ingredients. The main ingredient is represented by Bam(Ti(1-y)My)O3 (0.990<m<1.015, 0.001?y?0.010), where M is a transition metal including at least one of a pentavalent transition metal and a trivalent transition metal.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: March 28, 2017
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Du Won Choi, Sung Hyung Kang, Chang Hoon Kim
  • Publication number: 20160307701
    Abstract: There are provided a dielectric ceramic composition and a multilayer ceramic capacitor containing the same. The dielectric ceramic composition according to the present disclosure may contain a main base material ingredient and a first accessory ingredient, wherein the first accessory ingredient contains samarium (Sm) and other rare earth (RE) elements, and a ratio (a/b) of a content (a) of samarium (Sm) to a content (b) of other rare earth elements in the first accessory ingredient satisfies 0.1?a/b?2.0.
    Type: Application
    Filed: February 10, 2016
    Publication date: October 20, 2016
    Inventors: Jae Sung PARK, Chan Hee NAM, Doo Young KIM, Seok Hyun YOON, Du Won CHOI, Chang Hoon KIM
  • Publication number: 20160221878
    Abstract: A dielectric composition includesa main ingredient and accessory ingredients. The main ingredient is represented by Bam(Ti(1-y)My)O3 (0.990<m<1.015, 0.001?y?0.010), where M is a transition metal including at least one of a pentavalent transition metal and a trivalent transition metal.
    Type: Application
    Filed: October 21, 2015
    Publication date: August 4, 2016
    Inventors: Du Won CHOI, Sung Hyung KANG, Chang Hoon KIM
  • Patent number: 9190209
    Abstract: A dielectric ceramic composition includes: a base material powder BamTiO3 (0.995?m?1.010); 0.2 to 2.0 moles of a first accessory ingredient, an oxide or carbide containing at least one of Ba and Ca, based on 100 moles of the base material powder; a second accessory ingredient, an oxide containing Si or a glass compound containing Si; 0.2 to 1.5 moles of a third accessory ingredient, an oxide containing at least one of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, based on 100 moles of the base material powder; and 0.05 to 0.80 mole of a fourth accessory ingredient, an oxide containing at least one of Cr, Mo, W, Mn, Fe, Co, and Ni, based on 100 moles of the base material powder, a content ratio of the first accessory ingredient to the second accessory ingredient being 0.5 to 1.7.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: November 17, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sung Hyung Kang, Du Won Choi, Ki Yong Lee, Jae Hun Choe, Min Sung Song
  • Patent number: 9129753
    Abstract: A dielectric ceramic composition including a base material represented by (Ba(1-x)+REx)mTiO(3+x) (here, 0.995?m?1.010, 0.001<x<0.010, and RE is at least one rare earth (RE) atom selected from a group consisting of Dy, Y, Ho, Sm, and Gd) or Bam(Ti+REx)O(3-x) (here, 0.995?m?1.010, 0.001<x<0.010, and RE is at least one RE atom selected from a group consisting of Dy, Y, Ho, Sm, and Gd) as a main component, and a multi-layer ceramic capacitor using the same. In the dielectric ceramic composition, high permittivity (dielectric constant of 1800 or more) and high temperature reliability may be secured by using a RE atom doped/solid-solubilized base material and adding oxides, which are sub-components.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: September 8, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Du Won Choi, Min Sung Song, Jae Sung Park, Sung Hyung Kang, Chang Hoon Kim
  • Patent number: 9076578
    Abstract: There is provided a dielectric composition, including; a base powder including BamTiO3 (0.995?m?1.010); a first sub-component including 0.05 to 4.00 moles of an oxide or carbonate containing at least one rare-earth element based on 100 moles of the base powder; a second sub-component including 0.05 to 0.70 moles of an oxide or carbonate containing at least one transition metal; a third sub-component including 0.20 to 2.00 moles of a Si oxide; a fourth sub-component including 0.02 to 1.00 mole of an Al oxide; and a fifth sub-component including 20 to 140% of an oxide containing at least one of Ba and Ca, based on the third sub-component.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: July 7, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sung Hyung Kang, Du Won Choi, Min Sung Song, Sang Hoon Kwon, Chang Hoon Kim, Byoung Hwa Lee
  • Publication number: 20140293502
    Abstract: A dielectric ceramic composition including a base material represented by (Ba(1-x)+REx)mTiO(3+x) (here, 0.995?m?1.010, 0.001<x<0.010, and RE is at least one rare earth (RE) atom selected from a group consisting of Dy, Y, Ho, Sm, and Gd) or Bam(Ti+REx)O(3?x) (here, 0.995?m?1.010, 0.001<x<0.010, and RE is at least one RE atom selected from a group consisting of Dy, Y, Ho, Sm, and Gd) as a main component, and a multi-layer ceramic capacitor using the same. In the dielectric ceramic composition, high permittivity (dielectric constant of 1800 or more) and high temperature reliability may be secured by using a RE atom doped/solid-solubilized base material and adding oxides, which are sub-components.
    Type: Application
    Filed: October 9, 2013
    Publication date: October 2, 2014
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Du Won CHOI, Min Sung Song, Jae Sung Park, Sung Hyung Kang, Chang Hoon Kim
  • Publication number: 20140268484
    Abstract: A dielectric ceramic composition includes: a base material powder BamTiO3 (0.995?m?1.010); 0.2 to 2.0 moles of a first accessory ingredient, an oxide or carbide containing at least one of Ba and Ca, based on 100 moles of the base material powder; a second accessory ingredient, an oxide containing Si or a glass compound containing Si; 0.2 to 1.5 moles of a third accessory ingredient, an oxide containing at least one of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, based on 100 moles of the base material powder; and 0.05 to 0.80 mole of a fourth accessory ingredient, an oxide containing at least one of Cr, Mo, W, Mn, Fe, Co, and Ni, based on 100 moles of the base material powder, a content ratio of the first accessory ingredient to the second accessory ingredient being 0.5 to 1.7.
    Type: Application
    Filed: June 21, 2013
    Publication date: September 18, 2014
    Inventors: Sung Hyung KANG, Du Won CHOI, Ki Yong LEE, Jae Hun CHOE, Min Sung SONG
  • Publication number: 20140218840
    Abstract: There are provided a dielectric composition and a multilayer ceramic electronic component using the same, the dielectric composition including dielectric grains having a perovskite structure represented by ABO3, wherein the dielectric grain includes a base material, in which at least one rare earth element RE is solid-solubilized in at least one of A and B, and a transition element TR, and a ratio (TR/RE) of the transition element to the rare earth element is 0.2 to 0.8.
    Type: Application
    Filed: April 26, 2013
    Publication date: August 7, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sung Hyung KANG, Ki Yong LEE, Han Nah CHANG, Du Won CHOI, Jae Hun CHOE, Min Sung SONG
  • Publication number: 20140098455
    Abstract: There are provided a dielectric composition and a multilayer ceramic electronic component manufactured using the same, the dielectirc composition including dielectric grains having a perovskite structure represented by ABO3, a portion of the dielectric grains having a core-shell structure, wherein dielectric grains having an average length of a core equal to or less than 250 nm and a ratio of the average length of the core to an average length of the dielectric grain below 0.8 may be 50% or more of the portion of dielectric grains having a core-shell structure, so that the multilayer ceramic electronic component manufactured using the dielectric composition can have excellent reliability and secure a high dielectric constant.
    Type: Application
    Filed: March 15, 2013
    Publication date: April 10, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: SUNG HYUNG KANG, DU WON CHOI, MIN SUNG SONG
  • Publication number: 20140063686
    Abstract: A dielectric composition having a high dielectric constant, multi layered ceramic condensers comprising the same, and a method of preparing for multi layered ceramic condensers. The dielectric composition includes: a compound represented by general formula (Ba1-XCax)m(Ti1-yZry)O3 (0.995?m?1.010, 0.001?x?0.10, 0.001?y?0.20) as a main component; an Al oxide as a first sub-component; at least one metal selected from a group consisting of Mg, Sr, Ba, Ca, and Zr and the salt thereof, as a second sub-component; at least one metal selected from a group consisting of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu and the salt thereof, as a third sub-component; at least one metal selected from a group consisting of Cr, Mo, W, Mn, Fe, Co, and Ni and the salt thereof, as a fourth sub-component; and a fifth sub-component selected from Si containing glass forming compounds.
    Type: Application
    Filed: November 8, 2013
    Publication date: March 6, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sung Hyung KANG, Min Sung SONG, Du Won CHOI, Sang Hoon KWON, Chang Hoon KIM, Kang Heon HUR
  • Patent number: 8593038
    Abstract: There is provided a dielectric composition, including: a basic powder including BamTiO3(0.995?m?1.010); a first subcomponent including 0.1 to 0.6 mole of zirconium (Zr) oxide or carbide, based on 100 moles of the basic powder; a second subcomponent including 0.8 to 6.0 moles of oxide or carbide including at least one of magnesium (Mg), strontium (Sr), and barium (Ba); a third subcomponent including 0.2 to 1.8 moles of oxide including at least one rare earth element; a fourth subcomponent including 0.05 to 0.30 mole of oxide including at least one transition metal; a fifth subcomponent including 0.05 to 0.35 mole of oxide including at least one of vanadium (V), niobium (Nb), and tantalum (Ta); and a sixth subcomponent including 0.5 to 4.0 moles of oxide including at least one of silicon (Si) and aluminum (Al).
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: November 26, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Sung Hyung Kang, Du Won Choi, Min Sung Song, Chan Hee Nam
  • Publication number: 20130162100
    Abstract: There is provided a dielectric composition, including: a basic powder including BamTiO3(0.995?m?1.010); a first subcomponent including 0.1 to 0.6 mole of zirconium (Zr) oxide or carbide, based on 100 moles of the basic powder; a second subcomponent including 0.8 to 6.0 moles of oxide or carbide including at least one of magnesium (Mg), strontium (Sr), and barium (Ba); a third subcomponent including 0.2 to 1.8 moles of oxide including at least one rare earth element; a fourth subcomponent including 0.05 to 0.30 mole of oxide including at least one transition metal; a fifth subcomponent including 0.05 to 0.35 mole of oxide including at least one of vanadium (V), niobium (Nb), and tantalum (Ta); and a sixth subcomponent including 0.5 to 4.0 moles of oxide including at least one of silicon (Si) and aluminum (Al).
    Type: Application
    Filed: September 14, 2012
    Publication date: June 27, 2013
    Inventors: Sung Hyung KANG, Du Won Choi, Min Sung Song, Chan Hee Nam
  • Publication number: 20120113562
    Abstract: A dielectric composition having a high dielectric constant, multi layered ceramic condensers comprising the same, and a method of preparing for multi layered ceramic condensers. The dielectric composition includes: a compound represented by general formula (Ba1-XCax)m(Ti1-yZry)O3 (0.995?m?1.010, 0.001?x?0.10, 0.001, 0.001?y?0.20) as a main component; an Al oxide as a first sub-component; at least one metal selected from a group consisting of Mg, Sr, Ba, Ca, and Zr and the salt thereof, as a second sub-component; at least one metal selected from a group consisting of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu and the salt thereof, as a third sub-component; at least one metal selected from a group consisting of Cr, Mo, W, Mn, Fe, Co, and Ni and the salt thereof, as a fourth sub-component; and a fifth sub-component selected from Si containing glass forming compounds.
    Type: Application
    Filed: November 1, 2011
    Publication date: May 10, 2012
    Inventors: Sung Hyung KANG, Min Sung Song, Du Won Choi, Sang Hoon Kwon, Chang Hoon Kim, Kang Heon Hur