Patents by Inventor Hyun Myung Jang

Hyun Myung Jang 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: 8088307
    Abstract: The present invention provides a metal paste for forming an electrically conductive layer comprising a metal solution in a reactive organic solvent having a heteroatom P, S, O, or N; metal powder; a binder; and a residual amount of a polar or non-polar viscosity modulating solvent. The metal paste composition according to the present invention has advantages in that it produces structures of layers denser than those conventional metal pastes do; shows characteristics of a much lower electric resistance even with a relatively small thickness or a small line width, as compared with the conductive pattern formed from a conventional paste; and allows heat treatment at a very low temperature even without the use of expensive nano-sized metal particles. The metal paste also provides a silver paste, which can be economically prepared and has high adaptability to various surfaces.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: January 3, 2012
    Assignee: Exax Inc.
    Inventors: Soon Yeong Heo, Seong Sil Park, Seung Jun Han, Hyun Myung Jang
  • Patent number: 8070986
    Abstract: The present invention provides a silver paste for forming electrically conductive pattern comprising 0.1 to 60 wt % of a silver C0 to C12 aliphatic carboxylate; 1 to 80 wt % of silver powder; 0.1 to 15 wt % of a binder; and a residual organic solvent. The silver paste composition according to the present invention has advantages in that it produces micro-structures of layers denser than those conventional metal pastes do; shows characteristics of a much lower electric resistance even with a relatively small thickness or a small line width, as compared with the electrically conductive pattern formed from a conventional paste; and allows heat treatment at a very low temperature even without the use of expensive nano-sized metal particles.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: December 6, 2011
    Assignee: Exax Inc.
    Inventors: Soon Yeong Heo, Seong Sil Park, Seung Jun Han, Hyun Myung Jang
  • Patent number: 7976737
    Abstract: The present invention relates to solution type silver organo-sol ink for forming electrically conductive patterns. The present invention provides silver organo-sol ink of solution type for forming electrically conductive pattern comprising effective amount of silver aromatic carboxylate and a reactive organic solvents, which can form chelate or complex with silver, are, for example, organic solvents having keton, mercapto, carboxyl, aniline or sulfurous functional group, substituted or unsubstituted. By the present invention, silver organo-sol ink of solution type basically having higher content of silver is obtained. The solution type ink of the present invention can be used for forming conductive patterns in flat panel display such as plasma display panel(PDP) to reduce the numbers of steps for pattern forming drastically.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: July 12, 2011
    Assignee: Exax Inc.
    Inventors: Soon Yeong Heo, Dong Sung Seo, Eun Ji Lee, Hyun Myung Jang
  • Publication number: 20110005428
    Abstract: The present invention relates to solution type silver organo-sol ink for forming electrically conductive patterns. The present invention provides silver organo-sol ink of solution type for forming electrically conductive pattern comprising effective amount of silver aromatic carboxylate and a reactive organic solvents, which can form chelate or complex with silver, are, for example, organic solvents having keton, mercapto, carboxyl, aniline or sulfurous functional group, substituted or unsubstituted. By the present invention, silver organo-sol ink of solution type basically having higher content of silver is obtained. The solution type ink of the present invention can be used for forming conductive patterns in flat panel display such as plasma display panel(PDP) to reduce the numbers of steps for pattern forming drastically.
    Type: Application
    Filed: December 12, 2005
    Publication date: January 13, 2011
    Inventors: Soon Yeong Heo, Dong Sung Seo, Eun Ji Lee, Hyun Myung Jang
  • Publication number: 20100193751
    Abstract: The present invention provides a silver paste for forming electrically conductive pattern comprising 0.1 to 60 wt % of a silver C0 to C12 aliphatic carboxylate; 1 to 80 wt % of silver powder; 0.1 to 15 wt % of a binder; and a residual organic solvent. The silver paste composition according to the present invention has advantages in that it produces micro-structures of layers denser than those conventional metal pastes do; shows characteristics of a much lower electric resistance even with a relatively small thickness or a small line width, as compared with the electrically conductive pattern formed from a conventional paste; and allows heat treatment at a very low temperature even without the use of expensive nano-sized metal particles.
    Type: Application
    Filed: May 25, 2007
    Publication date: August 5, 2010
    Inventors: Soon Yeong Heo, Seong Sil Park, Seung Jun Han, Hyun Myung Jang
  • Publication number: 20100123102
    Abstract: The present invention provides a metal paste for forming an electrically conductive layer comprising a metal solution in a reactive organic solvent having a heteroatom P, S, O, or N; metal powder; a binder; and a residual amount of a polar or non-polar viscosity modulating solvent. The metal paste composition according to the present invention has advantages in that it produces structures of layers denser than those conventional metal pastes do; shows characteristics of a much lower electric resistance even with a relatively small thickness or a small line width, as compared with the conductive pattern formed from a conventional paste; and allows heat treatment at a very low temperature even without the use of expensive nano-sized metal particles. The metal paste also provides a silver paste, which can be economically prepared and has high adaptability to various surfaces.
    Type: Application
    Filed: May 25, 2007
    Publication date: May 20, 2010
    Inventors: Soon Yeong Heo, Seong Sil Park, Seung Jun Han, Hyun Myung Jang
  • Publication number: 20090090273
    Abstract: The present invention relates to solution type silver organo-sol ink for forming electrically conductive patterns. The present invention provides silver organo-sol ink of solution type for forming electrically conductive pattern comprising effective amount of silver CO to C16 aliphatic carboxylate saturated or unsaturated, linear or branched, unsubstituted or substituted with amino, nitro and/or hydroxy group(s) having 1 to 3 carboxyl groups or silver aromatic carboxylate; and organic solvent. By the present invention, silver organo-sol inks of solution type basically having higher content of silver for various reducing or metallizing temperatures are obtained. The solution type ink of the present invention can be used for forming conductive patterns in flat panel display such as plasma display panel(PDP) to reduce the numbers of steps for pattern forming.
    Type: Application
    Filed: January 11, 2007
    Publication date: April 9, 2009
    Applicant: EXAX INC,
    Inventors: Soon Yeong Heo, Dong Sung Seo, Eun Ji Lee, Seung Jun Han, Kwang Seop Kim, Hyun Myung Jang