Patents by Inventor Kwang Choon Chung

Kwang Choon Chung 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: 9786843
    Abstract: The invention relates to methods for fabricating an optoelectronic device, including: directly applying a printing ink composition to a patterning process, wherein the printing ink composition includes (1) at least one compound selected from the group of compounds represented by Chemical Formula 1, Chemical Formula 2, Chemical Formula 3, and mixtures thereof as disclosed herein in an amount of 0.01-90 wt % based on the total weight of the composition and (2) at least one material for an optoelectronic device.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: October 10, 2017
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Hyun Nam Cho, Ji Hoon Yoo
  • Patent number: 9671542
    Abstract: Provided herein is a method for producing a nano polaroid film using a one-pack type or two-pack type blackening ink so that a single layer film may replace a conventional polaroid film generally produced by superposing various types of optical films, and especially, a method for producing a nano polaroid film consisting of one film and having excellent observability by coating a transparent nano pattern substrate with a functional ink that contains a blackening material, and then removing particles formed on protruding portions using an etching solution, and refilling the functional ink into grooves.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: June 6, 2017
    Assignee: InkTec Co., Ltd.
    Inventors: Kwang-Choon Chung, Insook Yi, MinHee Kim, Ji Hoon Yoo
  • Publication number: 20170127528
    Abstract: The present disclosure relates to an apparatus for manufacturing FPCB and method for manufacturing FPCB, having no limitations of length of a circuit pattern being formed on a base film.
    Type: Application
    Filed: October 27, 2016
    Publication date: May 4, 2017
    Inventors: Kwang-Choon Chung, Byung Woong Moon
  • Patent number: 9556065
    Abstract: The present invention relates to a method for producing a transparent conductive film in a form of complex multi-layer film comprising at least one layer using a silver complex compound having special structure and an organic acid metal salt. The method for producing the transparent conductive film, using one or more solution processes, comprises steps of (1) forming a transparent layer over a transparent substrate to improve transmittance; and (2) forming the conductive layer allowing conductivity, and further comprises a step of (3) forming a protective layer to prevent a change over time of the conductive layer. According to the present invention, it is possible to achieve large-scaled transparent conductive film having excellent conductivity and transmittance, as well as simple processes.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: January 31, 2017
    Assignee: Inktec Co., Ltd.
    Inventors: Hyun Nam Cho, Ji Hoon Yoo, Kwang Choon Chung
  • Patent number: 9524046
    Abstract: Provided herein is a method for producing a hybrid transparent electrode, the method including filling grooves of a substrate with a conductive metal ink composition; filling the grooves with residue conductive metal ink composition that remains on a surface of the substrate as the grooves are being filled with the conductive metal ink composition to form an electrode pattern; and forming a conductive layer including a conductive material on the electrode pattern.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: December 20, 2016
    Assignee: INKTEC CO., LTD.
    Inventors: Kwang-Choon Chung, In-Sook Yi, Ji Hoon Yoo, Joonki Seong, Dae sang Han
  • Patent number: 9431616
    Abstract: Provided are a phosphaphenanthrene-carbazole-based organic light-emitting compound having superior light emitting properties, and an organic light-emitting device including the same.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: August 30, 2016
    Assignee: INKTEC CO., LTD.
    Inventors: Kwang Choon Chung, Hyun Nam Cho, Ji Hoon Yoo, Yun Ho Jung
  • Publication number: 20160234943
    Abstract: Provided herein is a method for forming a transparent electrode film for display and the transparent electrode film for display, the method comprising forming an electrode pattern by printing a fine electrode pattern on a release film using a conductive ink composition; forming an insulating layer by applying an insulating resin on the release film on which the electrode pattern has been formed; forming a substrate layer by laminating a substrate on the insulating layer; and removing the release film.
    Type: Application
    Filed: April 18, 2014
    Publication date: August 11, 2016
    Applicant: INKTEC CO., LTD.
    Inventors: Kwang-Choon CHUNG, Ji Hoon Yoo, Joonki SEONG, Dae sang Han
  • Patent number: 9396843
    Abstract: The present invention relates to a method of manufacturing a transparent conductive layer and a transparent conductive layer manufactured by the method. The method of manufacturing the transparent conductive layer includes: a) a step of forming a conductive nanowire layer on a base material; b) a step of thermally treating the conductive nanowire layer; c) a step of applying a conductive metal ink on the conductive nanowire layer; and d) a step of thermally treating the base material coated with the conductive metal ink to electrically bridge the conductive nanowires with each other by conductive metal particles of the conductive metal ink.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: July 19, 2016
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Nam Jung Kim, Insook Yi, Jung Ah Choi, Su Phil Kim
  • Publication number: 20160202404
    Abstract: Provided herein is a method for producing a nano polaroid film using a one-pack type or two-pack type blackening ink so that a single layer film may replace a conventional polaroid film generally produced by superposing various types of optical films, and especially, a method for producing a nano polaroid film consisting of one film and having excellent observability by coating a transparent nano pattern substrate with a functional ink that contains a blackening material, and then removing particles formed on protruding portions using an etching solution, and refilling the functional ink into grooves.
    Type: Application
    Filed: June 3, 2014
    Publication date: July 14, 2016
    Inventors: Kwang-Choon CHUNG, Insook YI, MinHee KIM, Ji Hoon YOO
  • Publication number: 20160194339
    Abstract: Provided herein is a method for preparing a silver complex. The method includes reacting a silver oxide with a mixture of ammonium carbamate and isopropyl amine at room temperature in the presence of methanol.
    Type: Application
    Filed: March 16, 2016
    Publication date: July 7, 2016
    Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo
  • Publication number: 20160192477
    Abstract: Provided herein is a method for manufacturing a conductive transparent substrate, the method including forming a plurality of main electrodes on the substrate such that the main electrodes are distanced from one another; and forming a connecting electrode that electrically connects two or more main electrodes such that the plurality of main electrodes are grouped into a plurality of group electrodes that are electrically disconnected from one another, thereby producing a conductive transparent substrate with excellent transmittance in a process of high yield.
    Type: Application
    Filed: July 7, 2014
    Publication date: June 30, 2016
    Inventors: Kwang-Choon Chung, Ji Hoon Yoo, Joonki Seong, Byung Hun Kim, Nam Boo Cho, Myung-Bong Yoo
  • Publication number: 20160181592
    Abstract: Provided herein is a method for forming a transparent electrode film, the method comprising forming an electrode pattern by printing an electrode pattern on a release film using a metal ink composition; forming an insulating layer by applying a curable resin on the release film on which the electrode pattern has been formed; forming a substrate layer by laminating a substrate on the insulating layer; removing the release film; and forming a conductive layer by applying a conductive material on the electrode pattern from which the release film has been removed.
    Type: Application
    Filed: May 16, 2014
    Publication date: June 23, 2016
    Inventors: Kwang-Choon Chung, In-Sook Yi, Ji Hoon Yoo, Joonki Seong, Dae Sang Han
  • Patent number: 9365935
    Abstract: The present invention provides an etching solution for silver or silver alloy comprising one at least ammonium compound represented by the formula (1), (2) or (3) below and an oxidant: wherein each of the variables is as defined herein.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: June 14, 2016
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Hyun-Nam Cho, Young-Kwan Seo
  • Publication number: 20160132141
    Abstract: Provided herein is a method for producing a hybrid transparent electrode, the method including filling grooves of a substrate with a conductive metal ink composition; filling the grooves with residue conductive metal ink composition that remains on a surface of the substrate as the grooves are being filled with the conductive metal ink composition to form an electrode pattern; and forming a conductive layer including a conductive material on the electrode pattern.
    Type: Application
    Filed: May 16, 2014
    Publication date: May 12, 2016
    Inventors: Kwang-Choon CHUNG, In-Sook YI, Ji Hoon YOO, Joonki SEONG, Dae sang HAN
  • Patent number: 9313900
    Abstract: Disclosed is a method for manufacturing a double-sided printed circuit board (PCB) having a circuit pattern by printing a conductive paste. According to the method of the present invention, a circuit pattern that is precise and highly conductive can be formed, and a reduction in raw materials and the simplification of processes are made possible. Also, due to the printing of the conductive paste, short-circuit can be prevented even when a conductive layer is bent or exposed to heat or physical impact.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: April 12, 2016
    Assignees: Inktec Co., Ltd., Haeun Chemtec Co., Ltd.
    Inventors: Kwang Choon Chung, Young-Koo Han, Myung-Bong Yoo, Nam-Boo Cho, Young-Ho Han, Kyong-Min Lee, Kwang-Baek Yoon, Hee-Yong Ahn, Su-Han Kim
  • Patent number: 9299483
    Abstract: Provided are a method for manufacturing a transparent conductive film and a transparent conductive film manufactured thereby, the method including: a) forming a coating film by coating a transparent conductive film coating solution on a substrate, the transparent conductive film coating solution including a non-polar solvent; a polar solvent; a conductive metal ink; and a surfactant; and b) forming a conductive pattern having a hole type transmissive part and a pattern part formed of the conductive metal ink, on the substrate, by drying and burning the coating film.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: March 29, 2016
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Hyun Nam Cho, Ji Hoon Yoo, Yun-Ho Jung
  • Patent number: 9290844
    Abstract: Provided is a method for manufacturing a metal film, including: coating or printing a metal ink containing an organic metal complex on a substrate; and necessarily parallel-performing a pressure process during a procedure of forming metal particles by firing the metal ink, thereby forming a conductive metal film. The present invention can provide a method for manufacturing a metal film capable of improving film characteristics such as conductivity, reflectance, and uniformity in thickness, and the like, as well as remarkably shortening the time for forming the metal film, thereby efficiently manufacturing a superior-quality metal film.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: March 22, 2016
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Hyun Nam Cho, Ji Hoon Yoo, Jae Ho Beak, Yoo Seong Kim
  • Patent number: 9269478
    Abstract: Provided are a method for preparing a transparent conductive layer and a transparent conductive layer prepared by the method. The method for preparing a transparent conductive layer includes: 1) forming a cellulose derivative film by coating a transparent substrate with a cellulose derivative coating liquid; 2) hydrolyzing the cellulose derivatives by treating the cellulose derivative film using an alkaline agent; 3) forming a metal film by coating the hydrolyzed cellulose derivative film with an organic metal ink and reducing metals on the cellulose derivative; and 4) forming a conductive metal layer by heat-treating the cellulose derivative film with the metal film formed, and a transparent conductive layer prepared by the method. According to the present invention, a process can be simplified, and also a transparent conductive layer having excellent conductivity, transmittance, bending resistance, and low haze can be prepared.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: February 23, 2016
    Assignee: INKTEC CO., LTD.
    Inventors: Kwang Choon Chung, Hyun Nam Cho, Ji Hoon Yoo, Yun Ho Jung, Su Phil Kim
  • Patent number: 9230707
    Abstract: Provided is a production method for a transparent conductive film wherein: a substrate has formed thereon a transparent conductive oxide, a conductive metal body, and a conductive polymer comprised in a transparent composite conductive layer; or else a substrate has formed thereon a transparent conductive oxide layer; a conductive metal body layer, and a conductive polymer layer comprised in a transparent composite conductive layer; or a substrate has formed thereon a transparent conductive oxide layer, and also a conductive metal body and a conductive polymer comprised in an organic-inorganic hybrid layer in a transparent composite conductive layer. Also provided is a transparent conductive film produced by means of the method.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: January 5, 2016
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Hyun-Nam Cho, Ji Hoon Yoo, Yun-Ho Jung
  • Patent number: 9167735
    Abstract: Provided is a method for manufacturing an electromagnetic interference (EMI) shielding film, including: (a) providing a single insulating layer on a first protective film, the insulating layer being made of an insulating layer composition including at least one resin selected from a thermoplastic resin and a thermosetting resin and at least one filler selected from a flame-retardant filler and an abrasion-resistant filler; (b) providing a metal layer on the insulating layer; (c) providing a conductive adhesive layer on the metal layer, the conductive adhesive layer being made from a conductive adhesive layer composition including at least one resin selected from a thermoplastic resin and a thermosetting resin and a conductive filler; and (d) providing a second protective film on the conductive adhesive layer, and an EMI shielding film manufactured by the method.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: October 20, 2015
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Hyun Nam Cho, Myung Bong Yoo, Nam-Boo Cho, Seok Pil Jin, Seong Hoon No