Patents by Inventor Won Jae Joo

Won Jae Joo 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: 20110127509
    Abstract: An organic light emitting device (OLED) includes a polymeric fluorescent light emitting material doped with a phosphorescent dopant to form a fluorescent light emitting layer. The fluorescent light emitting layer may inhibit or prevent device degradation without affecting light emission from the light emitting layer, and may improve the service life of the OLED.
    Type: Application
    Filed: November 29, 2010
    Publication date: June 2, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Won-jae JOO, Hye-yeon YANG, Jhun-mo SON, Ho-suk KANG
  • Publication number: 20110121338
    Abstract: A fluoro group-containing compound, a fluoro group-containing polymer, an organic light emitting device including the polymer, and a method of manufacturing the organic light emitting device are provided.
    Type: Application
    Filed: June 25, 2010
    Publication date: May 26, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jhun-mo Son, Won-jae Joo, Ho-suk Kang, Hye-yeon Yang
  • Publication number: 20110040068
    Abstract: Disclosed are a method for forming an organic layer pattern which is characterized by forming a thin layer by coating a coating solution including a polyimide-based polymer having a heteroaromatic pendant group including a heteroatom in its polyimide major chain, a photoinitiator and a crosslinking agent on a substrate and drying the substrate, and exposing and developing the thin layer, an organic layer pattern prepared by the method, and an organic memory device comprising the pattern. According to example embodiments, a high-resolution micropattern may be formed without undergoing any expensive process, e.g., photoresist, leading to simplification of the preparation process and cost reduction.
    Type: Application
    Filed: October 21, 2010
    Publication date: February 17, 2011
    Inventors: Sang Kyun Lee, Won Jae Joo, Kwang Hee Lee, Tae Lim Choi, Myung Sup Jung
  • Patent number: 7888453
    Abstract: Disclosed herein are ferrocene-containing polymers in which ferrocene is conjugated to the backbone of conductive conjugated polymers. Further disclosed are organic memory devices comprising the ferrocene-containing polymers. Because the organic memory devices possess the advantages of decreased switching time, decreased operating voltage, decreased fabrication costs and increased reliability, they may be used as highly integrated large-capacity memory devices.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: February 15, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae Lim Choi, Kwang Hee Lee, Sang Kyun Lee, Won Jae Joo
  • Publication number: 20110014744
    Abstract: Disclosed herein are organic memory devices and methods for fabricating such devices. The organic memory devices comprise a first electrode, a second electrode and an organic active layer extending between the first and second electrodes wherein the organic active layer is formed from one or more electrically conductive organic materials that contain heteroatoms and which are configured in such a manner as that the heteroatoms are available for linking or complexing metal atoms within the organic active layer. The metal ions may then be reduced to form metal filaments within the organic active layer to form a low resistance state and the metal filaments may, in turn, be oxidized to form a high resistance state and thereby function as memory devices.
    Type: Application
    Filed: September 27, 2010
    Publication date: January 20, 2011
    Inventors: Won Jae JOO, Tae Lim CHOI, Jae Ho LEE
  • Patent number: 7846765
    Abstract: Disclosed are a method for forming an organic layer pattern which is characterized by forming a thin layer by coating a coating solution including a polyimide-based polymer having a heteroaromatic pendant group including a heteroatom in its polyimide major chain, a photoinitiator and a crosslinking agent on a substrate and drying the substrate, and exposing and developing the thin layer, an organic layer pattern prepared by the method, and an organic memory device comprising the pattern. According to example embodiments, a high-resolution micropattern may be formed without undergoing any expensive process, e.g., photoresist, leading to simplification of the preparation process and cost reduction.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: December 7, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang Kyun Lee, Won Jae Joo, Kwang Hee Lee, Tae Lim Choi, Myung Sup Jung
  • Patent number: 7829885
    Abstract: Disclosed herein are organic memory devices and methods for fabricating such devices. The organic memory devices comprise a first electrode, a second electrode and an organic active layer extending between the first and second electrodes wherein the organic active layer is formed from one or more electrically conductive organic materials that contain heteroatoms and which are configured in such a manner as that the heteroatoms are available for linking or complexing metal atoms within the organic active layer. The metal ions may then be reduced to form metal filaments within the organic active layer to form a low resistance state and the metal filaments may, in turn, be oxidized to form a high resistance state and thereby function as memory devices.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: November 9, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won Jae Joo, Tae Lim Choi, Jae Ho Lee
  • Patent number: 7816670
    Abstract: An organic memory device and a method for fabricating the memory device are provided. The organic memory device may include a first electrode, a second electrode, and an ion transfer layer between the first electrode and the second electrode. The organic memory device may have lower operating voltage and current, and may be fabricated at lower costs.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: October 19, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won Jae Joo, Tae Lim Choi, Sang Kyun Lee
  • Publication number: 20100141123
    Abstract: An organic light emitting device (“OLED”) including a substrate; a plurality of polymer beads disposed on a substrate; a light emitting layer covering the plurality of polymer beads and having an embossed structure; and a cathode disposed on the light emitting layer.
    Type: Application
    Filed: June 10, 2009
    Publication date: June 10, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Won-jae JOO, Jhun-mo SON, Hye-yeon YANG
  • Publication number: 20100133992
    Abstract: Provided are compounds containing a phosphorescence unit, an emitting polymer, and an organic light emitting device (OLED) containing an organic layer including the emitting polymer. The OLED is useful in portable electronic equipment where low power consumption and low driving voltage are desirable.
    Type: Application
    Filed: May 5, 2009
    Publication date: June 3, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hye-yeon YANG, Jhun-mo SON, Won-jae JOO
  • Publication number: 20100117110
    Abstract: A photosensitive quantum dot including a quantum dot, and a plurality of photosensitive moieties that are bound to a surface of the quantum dot, wherein each of the photosensitive moieties includes silicon (Si) and a photosensitive functional group. Also disclosed are a composition for forming a quantum dot-containing pattern, where the composition includes the photosensitive quantum dot, and a method of forming a quantum dot-containing pattern using the composition.
    Type: Application
    Filed: June 8, 2009
    Publication date: May 13, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jong-jin Park, Kwang-hee Lee, Won-jae Joo, Xavier Bulliard, Yun-hyuk Choi, Kwang-sup Lee
  • Patent number: 7701745
    Abstract: A memory device driving circuit is disclosed which drives a memory device including a first electrode, a second electrode, and a memory layer interposed between the first electrode and the second electrode. The memory device driving circuit may include a main driver connected to the memory device, to drive the memory device, and a secondary driver connected between the memory device and the main driver, to control a set resistance of the memory device. The memory device driving circuit may freely adjust the set resistance of the memory device, to maintain the resistance of the memory device at a desired value. Accordingly, an improvement in the operation reliability of the memory device may be achieved.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: April 20, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won Jae Joo, Sang Kyun Lee
  • Patent number: 7656696
    Abstract: A resistive memory device having a resistor part for controlling a switching window. The resistive memory device of this disclosure can control a switching window to assure operational reliability thereof. In addition, since the memory device is realized by additionally providing only the resistor part for controlling a switching window to various resistive memory devices, it can be easily fabricated and applied to all current and voltage driving type resistive devices.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: February 2, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won Jae Joo, Kwang Hee Lee, Sang Kyun Lee, Yoon Sok Kang, Won Joo Kim
  • Patent number: 7635859
    Abstract: A memory device including an organic material layer between an upper electrode and a lower electrode. The organic material layer includes a dendrimer containing at least one electron-donating group and at least one electron-accepting group. The disclosed memory device is advantageous in that it shows a nonvolatile property, has high integration density and low power consumption characteristics, and may be inexpensively fabricated through a simple process.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: December 22, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang Kyun Lee, Won Jae Joo, Chul Hee Kim, Yoon Sok Kang
  • Publication number: 20090286082
    Abstract: Disclosed herein is a monomer for binding nano-metal, which is useful for the preparation of a conductor having increased conductivity with ensuring flexibility and transparency. Polymerization of the monomer for binding nano-metal provides a conductive polymer composite including a nano-metal rod. A method of preparing the conductive polymer composite is also provided.
    Type: Application
    Filed: November 21, 2008
    Publication date: November 19, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Byung Hee SOHN, Young Kwan LEE, Yi Yoiung YUN, Won Jae JOO
  • Patent number: 7612358
    Abstract: A nonvolatile nanochannel memory device using a mesoporous material. Specifically, a memory device is composed of a mesoporous material that is able to form nanochannels, in which a memory layer having metal nanoparticles or metal ions fed into the nanochannels is disposed between an upper electrode and a lower electrode. Thus, the memory device has high processability, and manifests excellent reproducibility and uniform performance.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: November 3, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won Jae Joo, Jin Heong Yim, Kwang Hee Lee, Sang Kyun Lee
  • Patent number: 7539038
    Abstract: A memory device of the current invention includes a memory layer having nanochannels sandwiched between an upper electrode and a lower electrode, in which the memory layer is made of an organic-inorganic complex for use in formation of nanopores, and has metal nanoparticles or metal ions fed into the nanopores. Therefore, the memory device has excellent processability, high reproducibility, and uniform performance.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: May 26, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang Hee Lee, Won Jae Joo, Jin Heong Yim, Yoon Sok Kang
  • Patent number: 7491968
    Abstract: A memory device, which includes a memory layer having quantum dots uniformly dispersed in organic material disposed between an upper electrode layer and a lower electrode layer. The memory device is advantageous because it is nonvolatile and inexpensive, and realizes high integration and high speed switching. Further, size and distribution of the quantum dots may be uniform, thus realizing uniform memory behavior. Furthermore, the memory device is suitable for application to portable electronic devices that must have low power consumption, due to low operating voltages thereof.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: February 17, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoon Sok Kang, Sang Kyun Lee, Won Jae Joo
  • Publication number: 20080248330
    Abstract: A dendrimer according to example embodiments may include a triphenylamine core, wherein a conjugated dendron having no heteroatoms is coupled to the triphenylamine core. An organic memory device according to example embodiments may include an organic active layer between a first electrode and a second electrode, wherein the organic active layer includes the dendrimer according to example embodiments. A barrier layer may be provided between the first and second electrodes. A method of manufacturing the organic memory device according to example embodiments may include forming an organic active layer between a first electrode and a second electrode, the organic active layer including the dendrimer according to example embodiments.
    Type: Application
    Filed: January 9, 2008
    Publication date: October 9, 2008
    Inventors: Won Jae Joo, Tae Lim Choi, Chulhee Kim, Kwang Hee Lee
  • Publication number: 20080241559
    Abstract: Disclosed herein is a dendrimer, in which metallocene, which is an oxidation-reduction material, is located at a core, and a conjugated dendron is connected to the metallocene core by a linker compound, an organic active layer having the dendrimer, an organic memory device having the organic active layer and a method of manufacturing the organic active layer and the organic memory device. The organic memory device manufactured using a dendrimer having a metallocene core of example embodiments may have a shorter switching time, decreased operation voltage, decreased manufacturing cost and increased reliability, thereby realizing a highly-integrated large-capacity memory device.
    Type: Application
    Filed: September 18, 2007
    Publication date: October 2, 2008
    Inventors: Won Jae Joo, Chulhee Kim, Kwang Hee Lee, Tae Lim Choi