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).
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Patent number: 8325262Abstract: 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: GrantFiled: December 3, 2008Date of Patent: December 4, 2012Assignee: Dongbu HiTek Co., Ltd.Inventor: Chee-Hong Choi
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Patent number: 8039387Abstract: 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: GrantFiled: December 3, 2008Date of Patent: October 18, 2011Assignee: Dongbu HiTek Co., Ltd.Inventor: Chee-Hong Choi
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Patent number: 7687392Abstract: 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: GrantFiled: October 31, 2007Date of Patent: March 30, 2010Assignee: Dongbu Hitek Co., Ltd.Inventor: Chee Hong Choi
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Patent number: 7662695Abstract: 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: GrantFiled: May 8, 2008Date of Patent: February 16, 2010Assignee: Dongbu Electronics Co. Ltd.Inventor: Chee Hong Choi
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Patent number: 7635898Abstract: 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: GrantFiled: June 18, 2007Date of Patent: December 22, 2009Assignee: Dongbu Electronics Co., Ltd.Inventors: Seok Su Kim, Chee Hong Choi
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Publication number: 20090267237Abstract: 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: ApplicationFiled: July 6, 2009Publication date: October 29, 2009Inventor: Chee-Hong Choi
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Patent number: 7595217Abstract: 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: GrantFiled: December 21, 2006Date of Patent: September 29, 2009Assignee: Dongbu HiTek Co., Ltd.Inventor: Chee Hong Choi
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Patent number: 7572694Abstract: 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: GrantFiled: December 15, 2006Date of Patent: August 11, 2009Assignee: Dongbu HiTek Co., Ltd.Inventor: Chee-Hong Choi
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Publication number: 20090141159Abstract: 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: ApplicationFiled: December 3, 2008Publication date: June 4, 2009Inventor: Chee-Hong Choi
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Publication number: 20090140303Abstract: 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: ApplicationFiled: December 3, 2008Publication date: June 4, 2009Inventor: Chee-Hong Choi
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Publication number: 20090108310Abstract: 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: ApplicationFiled: October 3, 2008Publication date: April 30, 2009Inventors: Dong Hee Seo, Chee Hong Choi
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Patent number: 7449359Abstract: 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: GrantFiled: December 29, 2005Date of Patent: November 11, 2008Assignee: Dongbu Electronics Co., Ltd.Inventors: Dong Hee Seo, Chee Hong Choi
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Publication number: 20080213958Abstract: 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: ApplicationFiled: May 8, 2008Publication date: September 4, 2008Inventor: Chee Hong Choi
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Publication number: 20080157379Abstract: 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: ApplicationFiled: October 31, 2007Publication date: July 3, 2008Inventor: Chee Hong Choi
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Patent number: 7385241Abstract: 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: GrantFiled: December 28, 2005Date of Patent: June 10, 2008Assignee: Dongbu Electronics Co., Ltd.Inventor: Chee Hong Choi
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Patent number: 7358574Abstract: 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: GrantFiled: December 29, 2005Date of Patent: April 15, 2008Assignee: Dongbu Electronics Co., Ltd.Inventor: Chee Hong Choi
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Patent number: 7314831Abstract: 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: GrantFiled: August 11, 2005Date of Patent: January 1, 2008Assignee: Dongbu Electronics Co., Ltd.Inventor: Chee Hong Choi
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Patent number: 7306987Abstract: 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: GrantFiled: December 29, 2005Date of Patent: December 11, 2007Assignee: Dongbu Electronics Co., Ltd.Inventors: Chee Hong Choi, Dong Yeal Keum
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Patent number: 7307000Abstract: 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: GrantFiled: March 6, 2006Date of Patent: December 11, 2007Assignee: Dongbu Electronics Co., Ltd.Inventor: Chee Hong Choi
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Patent number: 7265026Abstract: 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: GrantFiled: December 28, 2004Date of Patent: September 4, 2007Assignee: Dongbu Electronics Co., Ltd.Inventor: Chee Hong Choi