Patents by Inventor Jin Gyu Lee

Jin Gyu Lee 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: 20070196714
    Abstract: A polymer membrane, a method of preparing the same, and a fuel cell employing the same are provided, where the polymer membrane includes a porous polymer film having sulfonated pores. The polymer membrane can be prepared easily and economically, has excellent ionic conductivity, and effectively reduces crossover in a fuel cell.
    Type: Application
    Filed: February 22, 2007
    Publication date: August 23, 2007
    Inventors: Sang-kook Mah, Young-gyoon Ryu, Do-yun Kim, Jin-gyu Lee, Myung-sup Jung, Jae-jun Lee
  • Publication number: 20070196713
    Abstract: A polysiloxane compound and a fuel cell including the same where the polysiloxane compound is an organic polymer siloxane compound containing sulfonic acid groups. By using the organic polymer siloxane compound containing sulfonic acid groups, a polymer electrolyte membrane having superior characteristics such as dimensional stability and ionic conductivity, without affecting the amount of methanol crossover, can be obtained by reducing swelling due to liquids.
    Type: Application
    Filed: September 14, 2006
    Publication date: August 23, 2007
    Inventors: Sang-kook Mah, Do-yun Kim, Jin-gyu Lee, Myung-sup Jung, Jao-jun Lee
  • Publication number: 20070190385
    Abstract: A polymer electrolyte membrane including a polysilsesquioxane group-containing copolymer and an ionic conductive polymer is provided. A method of preparing the polymer electrolyte membrane and a fuel cell including the polymer electrolyte membrane is also provided. The polymer electrolyte membrane has improved ion conductivity and an improved ability to suppress methanol crossover, and therefore can be used as an electrolyte membrane for a fuel cell, including a direct methanol fuel cell.
    Type: Application
    Filed: November 27, 2006
    Publication date: August 16, 2007
    Inventors: Jin-gyu Lee, Sang-kook Mah, Myung-sup Jung, Jae-jun Lee, Do-yun Kim
  • Publication number: 20070151601
    Abstract: Disclosed herein is a semiconductor electrode including a layer of metal oxide particles; a dye coating a surface of the layer of metal oxide particles; and a carbon nanotube, having at least one anchoring functional group, attached to the layer of metal oxide particles through the anchoring functional group. Also disclosed are a method for preparing the semiconductor electrode and a solar cell including the semiconductor electrode.
    Type: Application
    Filed: August 21, 2006
    Publication date: July 5, 2007
    Inventors: Won Cheol Jung, Jin Gyu Lee, Jung Gyu Nam, Sang Cheol Park, Young Jun Park, Byung Hee Sohn, Eun Sung Lee
  • Publication number: 20070104993
    Abstract: A solid acid including a carbon nano tube (CNT), a spacer group combined with the CNT and an ionically conductive functional group connected to the spacer group. A polymer electrolyte membrane may include the same composition, and may be used in a fuel cell. The polymer electrolyte membrane using the solid acid has excellent ionic conductivity and suppresses the cross-over of methanol. The polymer electrolyte membrane is used as an electrolyte membrane of a fuel cell, for example, a direct methanol fuel cell.
    Type: Application
    Filed: October 4, 2006
    Publication date: May 10, 2007
    Inventors: Jin-gyu Lee, Sang-kook Mah, Myung-sup Jung, Young-gyoon Ryu, Jae-jun Lee, Do-yun Kim
  • Publication number: 20070099055
    Abstract: A polymer electrolyte membrane including an ionic conducting polymer and a light-irradiated product of a photoacid generator (PAG), a method of manufacturing the same, and a fuel cell using the same. The polymer electrolyte membrane has excellent proton conductivity and homogeneity by radiating light such as UV light onto the PAG, thereby producing an acid radical which generates an acid. The polymer electrolyte membrane also suppresses methanol crossover well. The polymer electrolyte membrane can be used as an electrolyte membrane of a fuel cell, for example, a direct methanol fuel cell.
    Type: Application
    Filed: October 10, 2006
    Publication date: May 3, 2007
    Inventors: Jin-gyu Lee, Myung-sup Jung, Do-yun Kim, Young-gyoon Ryu, Jae-jun Lee
  • Publication number: 20070092779
    Abstract: Provided are a dendrimer solid acid and a polymer electrolyte membrane using the same. The polymer electrolyte membrane includes a macromolecule of a dendrimer solid acid having ionically conductive terminal groups at the surface thereof and a minimum amount of ionically conductive terminal groups required for ionic conduction, thus suppressing swelling and allowing a uniform distribution of the dendrimer solid acid, thereby improving ionic conductivity. Since the number of ionically conductive terminal groups in the polymer electrolyte membrane is minimized and the polymer matrix in which swelling is suppressed is used, methanol crossover and difficulties of outflow due to a large volume may be reduced, and a macromolecule of the dendrimer solid acid having the ionically conductive terminal groups on the surface thereof is uniformly distributed. Accordingly, ionic conductivity is high and thus, the polymer electrolyte membrane shows good ionic conductivity even in non-humidified conditions.
    Type: Application
    Filed: October 10, 2006
    Publication date: April 26, 2007
    Inventors: Myung-sup Jung, Jin-gyu Lee, Sang-kook Mah, Jae-jun Lee
  • Publication number: 20070092778
    Abstract: An oligomer solid acid and a polymer electrolyte membrane using the same. The polymer electrolyte membrane includes a macromolecule of oligomer solid acid having an ionically conductive terminal group at its terminal end and the minimum amount of ionically conductive terminal groups required for ion conduction, thus suppressing swelling and allowing a uniform distribution of the oligomer solid acid, thereby improving ionic conductivity. Since the number of ionically conductive terminal groups in the polymer electrolyte membrane is minimized and the polymer matrix in which swelling is suppressed is used, methanol crossover and difficulties of outflow due to a large volume are minimized, and a macromolecule of the oligomer solid acid having the ionically conductive terminal groups on the surface thereof is uniformly distributed. Accordingly, ionic conductivity is high and thus, the polymer electrolyte membrane shows good ionic conductivity even in low humidity conditions.
    Type: Application
    Filed: October 10, 2006
    Publication date: April 26, 2007
    Inventors: Myung-sup Jung, Do-yun Kim, Jin-gyu Lee, Jae-jun Lee
  • Publication number: 20070082248
    Abstract: A solid acid having a core of calixarene or calix resorcinarene. The solid acid is an ion conducting compound in which at least one of the hydroxyl groups is substituted by an organic group having a cation exchange group at a terminal end, a polymer electrolyte membrane including the same, and a fuel cell using the polymer electrolyte membrane. The polymer electrolyte membrane can provide low methanol crossover and high ionic conductivity. Accordingly, a fuel cell having high efficiency can be obtained by using the polymer electrolyte membrane.
    Type: Application
    Filed: October 12, 2006
    Publication date: April 12, 2007
    Inventors: Jae-jun Lee, Myung-sup Jung, Do-yun Kim, Jin-gyu Lee, Sang-kook Mah
  • Publication number: 20070082247
    Abstract: An ion-conducting, sulfonated and crosslinked copolymer for use in a fuel cell is disclosed. The ion-conducting, sulfonated and crosslinked copolymer is made up of four monomers. The first monomer is an aromatic diol. The second monomer includes two groups, each group capable of reacting with the hydroxy groups of the first monomer, and each group independently selected from a nitro group and a halogen group. The third monomer is one of the first monomer or the second monomer, except that one of the hydrogen atoms attached to a benzene ring is substituted with —SO3Y, where Y is selected from hydrogen (H), lithium (Li), sodium (Na), potassium (K) and trialkyl ammonium of the form HNR3 where R is an alkyl group having from 1 to 5 carbon atoms. The fourth monomer includes at least three groups, each independently selected from a hydroxy group, a nitro group, and a halogen group.
    Type: Application
    Filed: October 11, 2006
    Publication date: April 12, 2007
    Inventors: Jae-jun Lee, Jin-gyu Lee, Sang-kook Mah, Myung-sup Jung
  • Patent number: 6908977
    Abstract: Disclosed herein is a siloxane-based resin prepared by hydrolyzing and polycondensing a cyclic siloxane compound, a silane compound having three hydrolysable functional groups and a silane compound having three hydrolysable functional groups and one heat-labile functional group, in an organic solvent in the presence of a catalyst and water. Also, disclosed herein is a method of forming an insulating film between interconnect layers of a semiconductor device using the siloxane-based resin thus prepared, whereby an insulating film having low dielectric constant as well as excellent mechanical properties can be obtained.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: June 21, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin Gyu Lee, Yi Yeol Lyu, Ji Hun Rhee
  • Publication number: 20040096398
    Abstract: Disclosed herein is a siloxane-based resin prepared by hydrolyzing and polycondensing a cyclic siloxane compound, a silane compound having three hydrolysable functional groups and a silane compound having three hydrolysable functional groups and one heat-labile functional group, in an organic solvent in the presence of a catalyst and water. Also, disclosed herein is a method of forming an insulating film between interconnect layers of a semiconductor device using the siloxane-based resin thus prepared, whereby an insulating film having low dielectric constant as well as excellent mechanical properties can be obtained.
    Type: Application
    Filed: October 16, 2003
    Publication date: May 20, 2004
    Inventors: Jin Gyu Lee, Yi Yeol Lyu, Ji Hun Rhee
  • Publication number: 20040091415
    Abstract: The present invention relates to a method for preparing nanoporous carbons with enhanced mechanical strength and the nanoporous carbons prepared by the method, and more specifically, to a method for preparing a nanoporous carbon, comprising the steps of (i) synthesizing a mesoporous silica template not being subjected to any calcination process; (ii) incorporating a mixture of a monomer for addition polymerization and initiator, or a mixture of a monomer for condensation polymerization and acid catalyst into the as-synthesized mesoporous silica template, and reacting the mixture to obtain a polymer-silica composite; and (iii) carbonizing the polymer-silica composite at a high temperature to obtain a carbon-silica composite, from which the silica template is then removed using a solvent.
    Type: Application
    Filed: December 23, 2002
    Publication date: May 13, 2004
    Inventors: Jong Sung Yu, Jin Gyu Lee, Seok Chang
  • Patent number: 6660822
    Abstract: The present invention provides a method for forming insulating film between interconnect layers in microelectronic devices, said method comprising the steps of: preparing siloxane-based resins by hydrolyzing and polycondensing the compound represented by the following formula (1), with or without the compound represented by the following formula (2), in an organic solvent in the presence of a catalyst and water; coating a silicon substrate with the siloxane-based resins dissolved in an organic solvent; and heat-curing the resulting coating film:  RSiX1X2X3  [2] in which, R is hydrogen atom, C1˜C3 alkyl group, C3˜C10 cycloalkyl group, or C6˜C15 aryl group; X1, X2 and X3 are independently C1˜C3 alkyl group, C1˜C10 alkoxy group, or halogen atom; n is an integer ranging from 3 to 8; and m is an integer ranging from 1 to 10.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: December 9, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yi Yeol Lyu, Jin Heong Yim, Sang Kook Mah, Eun Ju Nah, Il Sun Hwang, Hyun Dam Jeong, Jin Gyu Lee
  • Publication number: 20020098279
    Abstract: The present invention provides a method for forming insulating film between interconnect layers in microelectronic devices, said method comprising the steps of: preparing siloxane-based resins by hydrolyzing and polycondensing the compound represented by the following formula (1), with or without the compound represented by the following formula (2), in an organic solvent in the presence of a catalyst and water; coating a silicon substrate with the siloxane-based resins dissolved in an organic solvent; and heat-curing the resulting coating film: 1  RSiX1X2X3  [2]
    Type: Application
    Filed: July 2, 2001
    Publication date: July 25, 2002
    Inventors: Yi Yeol Lyu, Jin Heong Yim, Sang Kook Mah, Eun Ju Nah, Il Sun Hwang, Hyun Dam Jeong, Jin Gyu Lee