Patents by Inventor Chee Hong Choi

Chee Hong 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).

  • Patent number: 8325262
    Abstract: An image sensor and a manufacturing method for an image sensor. An image may include a central pixel array that contains pixels disposed in a center of a pixel area, and a peripheral pixel array that contains pixels disposed in a periphery of the pixel area. A gate oxide layer at a center area of a photodiode may have a smaller thickness than a gate oxide layer of pixels at a center area of the photodiode.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: December 4, 2012
    Assignee: Dongbu HiTek Co., Ltd.
    Inventor: Chee-Hong Choi
  • Patent number: 8039387
    Abstract: A semiconductor device and a method for manufacturing the same includes forming a via pattern having a matrix form in a dielectric layer. The via pattern includes a via slit provided at the center of the via pattern and a plurality of via holes provided at an outer periphery of the via pattern and surrounding the via slit. Metal plugs are formed in the via holes.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: October 18, 2011
    Assignee: Dongbu HiTek Co., Ltd.
    Inventor: Chee-Hong Choi
  • Patent number: 7687392
    Abstract: A method for fabricating a semiconductor device having a metal wiring is provided. The method includes: forming an inter-metal dielectric (IMD) layer on the semiconductor substrate having a first metal wiring formed therein, the IMD layer including a first IMD layer and a second IMD layer; forming a via hole in the IMD layer to expose the first metal wiring; forming an ion barrier layer on sidewalls of the via hole; forming a diffusion barrier layer on the semiconductor substrate, on which the ion barrier layer has been formed; forming a metal layer on the semiconductor substrate in the via hole; and forming a second metal wiring on the semiconductor substrate, the second metal wiring contacting the metal layer in the via hole.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: March 30, 2010
    Assignee: Dongbu Hitek Co., Ltd.
    Inventor: Chee Hong Choi
  • Patent number: 7662695
    Abstract: Disclosed are a vertical-type capacitor and a formation method thereof. The capacitor includes a first electrode wall and a second electrode wall perpendicular to a semiconductor substrate, and at least one dielectric layer on the substrate to insulate the first electrode wall from the second electrode wall. The first electrode wall includes a plurality of first conductive layers and a plurality of first contacts, the plurality of first conductive layers being interconnected with each other by each of the plurality of first contacts. The second electrode wall includes a plurality of second conductive layers and a plurality of second contacts, the plurality of second conductive layers being interconnected with each other by each of the plurality of second contacts.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: February 16, 2010
    Assignee: Dongbu Electronics Co. Ltd.
    Inventor: Chee Hong Choi
  • Patent number: 7635898
    Abstract: Semiconductor devices and methods for fabricating a semiconductor devices are disclosed. A disclosed method comprises: forming a first gate electrode functioning as a flash memory; forming first spacers on sidewalls of the first gate electrode; forming a second gate electrode functioning as a normal gate electrode; forming a source/drain region with a shallow junction by performing a first ion implantation process using at least one of the first spacers as a mask; forming second spacers on a sidewall of the first spacer and on sidewalls of the second gate electrode; forming a source/drain region with a deep junction by performing a second ion implantation process using the second spacers as a mask.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: December 22, 2009
    Assignee: Dongbu Electronics Co., Ltd.
    Inventors: Seok Su Kim, Chee Hong Choi
  • Publication number: 20090267237
    Abstract: A method for manufacturing a semiconductor device includes forming an insulation film over a semiconductor substrate having a conduction layer; forming a trench pattern over the insulation film; etching an upper portion of the insulation film by using the trench pattern as a mask to form a trench; removing the trench pattern; forming a spacer film over the insulation film having the trench; etching the space film to form a spacer by using a blanket etching process, the spacer remaining over an edge of an inner portion of the trench; etching the insulation film to form a via hole by using as a mask the spacer; completely removing the spacer; forming a barrier film over sidewalls of the trench and the via hole; and forming a metal line with which fills inner portions of the trench and the via hole.
    Type: Application
    Filed: July 6, 2009
    Publication date: October 29, 2009
    Inventor: Chee-Hong Choi
  • Patent number: 7595217
    Abstract: A CMOS image sensor may include at least one of: a semiconductor substrate over which a photodiode and transistors are formed; passivation layers formed over a semiconductor substrate; and color PRs buried in trenches formed in the passivation layers and formed to be higher than the trenches.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: September 29, 2009
    Assignee: Dongbu HiTek Co., Ltd.
    Inventor: Chee Hong Choi
  • Patent number: 7572694
    Abstract: A method for manufacturing a semiconductor device includes forming an insulation film over a semiconductor substrate having a conduction layer; forming a trench pattern over the insulation film; etching an upper portion of the insulation film by using the trench pattern as a mask to form a trench; removing the trench pattern; forming a spacer film over the insulation film having the trench; etching the space film to form a spacer by using a blanket etching process, the spacer remaining over an edge of an inner portion of the trench; etching the insulation film to form a via hole by using as a mask the spacer; completely removing the spacer; forming a barrier film over sidewalls of the trench and the via hole; and forming a metal line with which fills inner portions of the trench and the via hole.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: August 11, 2009
    Assignee: Dongbu HiTek Co., Ltd.
    Inventor: Chee-Hong Choi
  • Publication number: 20090141159
    Abstract: An image sensor and a manufacturing method for an image sensor. An image may include a central pixel array that contains pixels disposed in a center of a pixel area, and a peripheral pixel array that contains pixels disposed in a periphery of the pixel area. A gate oxide layer at a center area of a photodiode may have a smaller thickness than a gate oxide layer of pixels at a center area of the photodiode.
    Type: Application
    Filed: December 3, 2008
    Publication date: June 4, 2009
    Inventor: Chee-Hong Choi
  • Publication number: 20090140303
    Abstract: A semiconductor device and a method for manufacturing the same includes forming a via pattern having a matrix form in a dielectric layer. The via pattern includes a via slit provided at the center of the via pattern and a plurality of via holes provided at an outer periphery of the via pattern and surrounding the via slit. Metal plugs are formed in the via holes.
    Type: Application
    Filed: December 3, 2008
    Publication date: June 4, 2009
    Inventor: Chee-Hong Choi
  • Publication number: 20090108310
    Abstract: A CMOS image sensor and fabricating method thereof are disclosed, by which a light condensing effect is enhanced by providing an inner microlens to a semiconductor substrate. The present invention includes a plurality of photodiodes on a semiconductor substrate, a plurality of inner microlenses on a plurality of the photodiodes, an insulating interlayer on a plurality of the inner microlenses, a plurality of metal lines within the insulating interlayer, a device protecting layer on the insulating interlayer, and a plurality of microlenses on the device protecting layer.
    Type: Application
    Filed: October 3, 2008
    Publication date: April 30, 2009
    Inventors: Dong Hee Seo, Chee Hong Choi
  • Patent number: 7449359
    Abstract: A fabricating method of a CMOS image sensor is disclosed, by which a light condensing effect is enhanced by providing an inner microlens to a semiconductor substrate. The CMOS image sensor includes a plurality of photodiodes on a semiconductor substrate, a plurality of inner microlenses on a plurality of the photodiodes, an insulating interlayer on a plurality of the inner microlenses, a plurality of metal lines within the insulating interlayer, a device protecting layer on the insulating interlayer, and a plurality of microlenses on the device protecting layer.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: November 11, 2008
    Assignee: Dongbu Electronics Co., Ltd.
    Inventors: Dong Hee Seo, Chee Hong Choi
  • Publication number: 20080213958
    Abstract: Disclosed are a vertical-type capacitor and a formation method thereof. The capacitor includes a first electrode wall and a second electrode wall perpendicular to a semiconductor substrate, and at least one dielectric layer on the substrate to insulate the first electrode wall from the second electrode wall. The first electrode wall includes a plurality of first conductive layers and a plurality of first contacts, the plurality of first conductive layers being interconnected with each other by each of the plurality of first contacts. The second electrode wall includes a plurality of second conductive layers and a plurality of second contacts, the plurality of second conductive layers being interconnected with each other by each of the plurality of second contacts.
    Type: Application
    Filed: May 8, 2008
    Publication date: September 4, 2008
    Inventor: Chee Hong Choi
  • Publication number: 20080157379
    Abstract: A method for fabricating a semiconductor device having a metal wiring is provided. The method includes: forming an inter-metal dielectric (IMD) layer on the semiconductor substrate having a first metal wiring formed therein, the IMD layer including a first IMD layer and a second IMD layer; forming a via hole in the IMD layer to expose the first metal wiring; forming an ion barrier layer on sidewalls of the via hole; forming a diffusion barrier layer on the semiconductor substrate, on which the ion barrier layer has been formed; forming a metal layer on the semiconductor substrate in the via hole; and forming a second metal wiring on the semiconductor substrate, the second metal wiring contacting the metal layer in the via hole.
    Type: Application
    Filed: October 31, 2007
    Publication date: July 3, 2008
    Inventor: Chee Hong Choi
  • Patent number: 7385241
    Abstract: Disclosed are a vertical-type capacitor and a formation method thereof. The capacitor includes a first electrode wall and a second electrode wall perpendicular to a semiconductor substrate, and at least one dielectric layer on the substrate to insulate the first electrode wall from the second electrode wall. The first electrode wall includes a plurality of first conductive layers and a plurality of first contacts, the plurality of first conductive layers being interconnected with each other by each of the plurality of first contacts. The second electrode wall includes a plurality of second conductive layers and a plurality of second contacts, the plurality of second conductive layers being interconnected with each other by each of the plurality of second contacts.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: June 10, 2008
    Assignee: Dongbu Electronics Co., Ltd.
    Inventor: Chee Hong Choi
  • Patent number: 7358574
    Abstract: A semiconductor device having a silicide-blocking layer is provided. The device includes a field oxide layer defining an active region, source/drain regions in the active region of a substrate, a gate oxide layer and a gate electrode on the substrate between the source/drain regions, dielectric spacers on sidewalls of the gate electrode, and a silicide layer on both the gate electrode and the source/drain regions. The device also includes the silicide-blocking layer formed over the border between the field oxide layer and the source/drain regions. The silicide-blocking layer covers edges of the source/drain regions, obstructing the extension of the silicide layer.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: April 15, 2008
    Assignee: Dongbu Electronics Co., Ltd.
    Inventor: Chee Hong Choi
  • Patent number: 7314831
    Abstract: A copper line on a semiconductor device and a method for forming the same is disclosed, wherein an insulating layer is deposited so as to minimize the dishing of IMD without using a dummy area when performing the planarization process. The method of forming the copper line on the semiconductor device includes the steps of forming an IMD on a semiconductor substrate including a lower metal layer, forming an isolation layer on the IMD, exposing the lower metal layer by patterning the IMD and the isolation layer, forming a copper layer on the exposed lower metal layer and the isolation layer, and planarizing the copper layer.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: January 1, 2008
    Assignee: Dongbu Electronics Co., Ltd.
    Inventor: Chee Hong Choi
  • Patent number: 7307000
    Abstract: A capacitor for a semiconductor device includes a first inter metal dielectric layer is disposed on a substrate. A first electrode is disposed on the first inter metal dielectric layer. A second electrode partially overlaps the first electrode. A first dielectric layer is disposed between the first and second electrodes. A third electrode partially overlaps the second electrode. A second dielectric layer is disposed between the second and third electrodes. An etch stop layer is disposed on the first, second, and third electrodes. A second inter metal dielectric layer is formed on the etch stop layer and includes first, second, and third via holes exposing the first and third electrodes and the etch stop layer. First, second, and third plugs are disposed in the first, second, and third via holes.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: December 11, 2007
    Assignee: Dongbu Electronics Co., Ltd.
    Inventor: Chee Hong Choi
  • Patent number: 7306987
    Abstract: A capacitor structure and a method of fabricating the capacitor structure wherein. The lower electrode and the upper electrode are constructed to be separated from each other by a predetermined interval and to be engaged with each other using a series of alternating ridges so that an effective surface area can increase within a limited area.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: December 11, 2007
    Assignee: Dongbu Electronics Co., Ltd.
    Inventors: Chee Hong Choi, Dong Yeal Keum
  • Patent number: 7265026
    Abstract: An isolation method in a semiconductor device is disclosed. The example method sequentially forms a pad oxide layer and a pad nitride layer on a semiconductor substrate, patterns the pad nitride and oxide layers to form an opening exposing a portion of the substrate, and forms a trench in exposed portion of the substrate. The example method also etches the patterned pad nitride layer to extend the opening, carries out SAC oxidation on the extended opening and the trench to provide a rounded corner to an upper corner of the substrate in the vicinity of the trench, and fills the trench with an insulating layer.
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: September 4, 2007
    Assignee: Dongbu Electronics Co., Ltd.
    Inventor: Chee Hong Choi