Patents by Inventor Yong-Joon Choi

Yong-Joon 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: 20080112185
    Abstract: A back light unit, in which bright lines produced from point light sources, light emitting diodes, in an oblique direction are removed, so that brightness can be uniformly maintained at a liquid crystal panel. The back light unit includes a prism light guide plate, light emitting diodes provided on one side of the prism light guide plate, and a bright-line dead section provided to the prism light guide plate so as to uniformly scatter light of each light condensing section generated by light emitted from the light emitting diodes, to prevent a spectrum of the light in a specific direction, and to prevent bright lines from being produced.
    Type: Application
    Filed: September 7, 2007
    Publication date: May 15, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jae Heon Noh, Dong Seob Jang, Seong Ho Youn, Sun Gil Kim, Hye Eun Park, Yong Joon Choi, Kyong Hak Seo
  • Publication number: 20060244877
    Abstract: An LCD includes an LCD panel, a light guiding plate including a light guiding plate main body disposed behind the LCD panel and a reflective polarizing layer formed on a surface of the light guiding plate main body to face the LCD panel, and a light source disposed on at least one side of the light guiding plate. The LCD has a high light efficiency by using a light guiding plate since a reflective polarizing layer is formed on the light guiding plate.
    Type: Application
    Filed: November 22, 2005
    Publication date: November 2, 2006
    Inventors: Jae-heon Noh, Su-dong Moon, Young-min Seo, In-youl Seo, Dong-seob Jang, Yong-joon Choi, Seong-ho Youn
  • Patent number: 6828637
    Abstract: A semiconductor memory device having a dummy active region is provided, which includes a plurality of parallel main active regions and a dummy active region coupled to ends of the main active regions. The main preferably active regions are arranged in a main memory cell array region and extend to or through a dummy cell array region surrounding the main memory cell array region. Further, the dummy active region is perpendicular to the main active regions. A redundancy cell array region may intervene between the main memory cell array region and the dummy cell array region. In this case, the main active regions are extended to the dummy cell array region through the redundancy cell array region.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: December 7, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hong-Soo Kim, Jung-Dal Choi, Jong-Sun Sel, Yong-Joon Choi
  • Patent number: 6806518
    Abstract: A semiconductor memory device having a dummy active region is provided, which includes a plurality of parallel main active regions and a dummy active region coupled to ends of the main active regions. The main preferably active regions are arranged in a main memory cell array region and extend to or through a dummy cell array region surrounding the main memory cell array region. Further, the dummy active region is perpendicular to the main active regions. A redundancy cell array region may intervene between the main memory cell array region and the dummy cell array region. In this case, the main active regions are extended to the dummy cell array region through the redundancy cell array region.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: October 19, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hong-Soo Kim, Jung-Dal Choi, Jong-Sun Sel, Yong-Joon Choi
  • Publication number: 20040169206
    Abstract: A semiconductor memory device having a dummy active region is provided, which includes a plurality of parallel main active regions and a dummy active region coupled to ends of the main active regions. The main preferably active regions are arranged in a main memory cell array region and extend to or through a dummy cell array region surrounding the main memory cell array region. Further, the dummy active region is perpendicular to the main active regions. A redundancy cell array region may intervene between the main memory cell array region and the dummy cell array region. In this case, the main active regions are extended to the dummy cell array region through the redundancy cell array region.
    Type: Application
    Filed: March 5, 2004
    Publication date: September 2, 2004
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hong-Soo Kim, Jung-Dal Choi, Jong-Sun Sel, Yong-Joon Choi
  • Publication number: 20040171218
    Abstract: A semiconductor memory device having a dummy active region is provided, which includes a plurality of parallel main active regions and a dummy active region coupled to ends of the main active regions. The main preferably active regions are arranged in a main memory cell array region and extend to or through a dummy cell array region surrounding the main memory cell array region. Further, the dummy active region is perpendicular to the main active regions. A redundancy cell array region may intervene between the main memory cell array region and the dummy cell array region. In this case, the main active regions are extended to the dummy cell array region through the redundancy cell array region.
    Type: Application
    Filed: March 5, 2004
    Publication date: September 2, 2004
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hong-Soo Kim, Jung-Dal Choi, Jong-Sun Sel, Yong-Joon Choi
  • Patent number: 6767687
    Abstract: The present invention relates to a polymer for a chemically amplified resist and a resist composition using the same. The present invention provides a polymer represented by the Formula (1) and a chemically resist composition for extreme ultraviolet light comprising the same. The chemically amplified resist composition comprising the polymer represented by the formula (1) of the present invention responds to mono wavelength in a micro-lithography process and can embody a micro-pattern of high resolution on a substrate.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: July 27, 2004
    Assignee: Dongjin Semichem Co., Ltd.
    Inventors: Deog-Bae Kim, Hyun-Jin Kim, Yong-Joon Choi, Yoon-Sik Chung
  • Patent number: 6743881
    Abstract: The present invention relates to a polymer for a chemically amplified resist and a resist composition using the same. The present invention provides a polymer represented by the Formula (1) and a chemically resist composition for deep ultraviolet light comprising the same, The chemically amplified resist composition comprising the polymer represented by the formula (1) of the present invention responds process and can embody a micro-paten of high resolution on a substrate.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: June 1, 2004
    Assignee: Dongjin Semichem Co., Ltd.
    Inventors: Deog-Bae Kim, Hyeon-Jin Kim, Yong-Joon Choi, Yoon-Sik Chung
  • Patent number: 6740940
    Abstract: A semiconductor memory device having a dummy active region is provided, which includes a plurality of parallel main active regions and a dummy active region coupled to ends of the main active regions. The main preferably active regions are arranged in a main memory cell array region and extend to or through a dummy cell array region surrounding the main memory cell array region. Further, the dummy active region is perpendicular to the main active regions. A redundancy cell array region may intervene between the main memory cell array region and the dummy cell array region. In this case, the main active regions are extended to the dummy cell array region through the redundancy cell array region.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: May 25, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hong-Soo Kim, Jung-Dal Choi, Jong-Sun Sel, Yong-Joon Choi
  • Publication number: 20030181629
    Abstract: The present invention relates to a polymer for a chemically amplified resist and a resist composition using the same. The present invention provides a polymer represented by the Formula (1) and a chemically resist composition for deep ultraviolet light comprising the same. The chemically amplified resist composition comprising the polymer represented by the formula (1) of the present invention responds to mono wavelength in a micro-lithography process and can embody a micro-pattern of high resolution on a substrate.
    Type: Application
    Filed: April 16, 2003
    Publication date: September 25, 2003
    Inventors: Deog- Bae Kim, Hyeon-Jin Kim, Yong-Joon Choi, Yoon-sik Chung
  • Publication number: 20030099144
    Abstract: A semiconductor memory device having a dummy active region is provided, which includes a plurality of parallel main active regions and a dummy active region coupled to ends of the main active regions. The main preferably active regions are arranged in a main memory cell array region and extend to or through a dummy cell array region surrounding the main memory cell array region. Further, the dummy active region is perpendicular to the main active regions. A redundancy cell array region may intervene between the main memory cell array region and the dummy cell array region. In this case, the main active regions are extended to the dummy cell array region through the redundancy cell array region.
    Type: Application
    Filed: April 29, 2002
    Publication date: May 29, 2003
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hong-Soo Kim, Jung-Dal Choi, Jong-Sun Sel, Yong-Joon Choi