Patents by Inventor Jongkook Park
Jongkook Park 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: 11514954Abstract: An integrated circuit memory device includes a plurality of row selection transistors and a dummy row selection transistor, on a substrate. A plurality of word lines and a plurality of dummy word lines are also provided on the substrate. A plurality of memory cells are provided, which are electrically connected to corresponding ones of the plurality of word lines. A plurality of dummy memory cells are provided, which are electrically connected to corresponding ones of the plurality of dummy word lines. A first wiring structure is provided, which electrically connects a first one of the plurality of word lines to a first one of the plurality of row selection transistors, and a second wiring structure is provided, which electrically connects the plurality of dummy word lines together and to the dummy row selection transistor.Type: GrantFiled: June 1, 2021Date of Patent: November 29, 2022Inventors: Boram Im, Hongsoo Kim, Jongkook Park, Hose Choi, Hyunju Sung
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Publication number: 20220130430Abstract: An integrated circuit memory device includes a plurality of row selection transistors and a dummy row selection transistor, on a substrate. A plurality of word lines and a plurality of dummy word lines are also provided on the substrate. A plurality of memory cells are provided, which are electrically connected to corresponding ones of the plurality of word lines. A plurality of dummy memory cells are provided, which are electrically connected to corresponding ones of the plurality of dummy word lines. A first wiring structure is provided, which electrically connects a first one of the plurality of word lines to a first one of the plurality of row selection transistors, and a second wiring structure is provided, which electrically connects the plurality of dummy word lines together and to the dummy row selection transistor.Type: ApplicationFiled: June 1, 2021Publication date: April 28, 2022Inventors: Boram Im, Hongsoo Kim, Jongkook Park, Hose Choi, Hyunju Sung
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Patent number: 9366423Abstract: Disclosed is an LED illumination device of a simple configuration, capable of suppressing thermal resistance to a low level, and of effectively dissipating heat generated from LED elements. Rigidity of a mounting plate is ensured by a wall of a certain height, and thereby the mounting plate now becomes possible to endure saturation vapor pressure of a coolant liquid possibly exerted thereon, and vacuum state or near-vacuum state when the coolant liquid is injected, without being deformed. Since the rigidity of the mounting plate is ensured by the wall, a wall composing a bottom face of recesses may now be thinned, and this is advantageous in view of allowing the heat generated from the LED elements to effectively conduct to the coolant liquid, and of effectively cooling the LED elements.Type: GrantFiled: September 19, 2012Date of Patent: June 14, 2016Assignee: Soleco Co., Ltd.Inventors: Jongkook Park, Taro Okamoto, Kazuhiro Katou, Mitsuyoshi Ishikawa
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Publication number: 20140233233Abstract: Disclosed is an LED illumination device of a simple configuration, capable of suppressing thermal resistance to a low level, and of effectively dissipating heat generated from LED elements. Rigidity of a mounting plate is ensured by a wall of a certain height, and thereby the mounting plate now becomes possible to endure saturation vapor pressure of a coolant liquid possibly exerted thereon, and vacuum state or near-vacuum state when the coolant liquid is injected, without being deformed. Since the rigidity of the mounting plate is ensured by the wall, a wall composing a bottom face of recesses may now be thinned, and this is advantageous in view of allowing the heat generated from the LED elements to effectively conduct to the coolant liquid, and of effectively cooling the LED elements.Type: ApplicationFiled: September 19, 2012Publication date: August 21, 2014Inventors: Jongkook Park, Taro Okamota, Kazuhiro Katou, Mitsuyoshi Ishikawa
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Patent number: 8502112Abstract: A variable astigmatic focal beam spot is formed using lasers with an anamorphic beam delivery system. The variable astigmatic focal beam spot can be used for cutting applications, for example, to scribe semiconductor wafers such as light emitting diode (LED) wafers. The exemplary anamorphic beam delivery system comprises a series of optical components, which deliberately introduce astigmatism to produce focal points separated into two principal meridians, i.e. vertical and horizontal. The astigmatic focal points result in an asymmetric, yet sharply focused, beam spot that consists of sharpened leading and trailing edges. Adjusting the astigmatic focal points changes the aspect ratio of the compressed focal beam spot, allowing adjustment of energy density at the target without affecting laser output power. Scribing wafers with properly optimized energy and power density increases scribing speeds while minimizing excessive heating and collateral material damage.Type: GrantFiled: May 4, 2010Date of Patent: August 6, 2013Assignee: IPG Microsystems LLCInventors: Patrick J. Sercel, Jeffrey P. Sercel, Jongkook Park
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Patent number: 7846847Abstract: A lift off process is used to separate a layer of material from a substrate by irradiating an interface between the layer of material and the substrate. According to one exemplary process, the layer is separated into a plurality of sections corresponding to dies on the substrate and a homogeneous beam spot is shaped to cover an integer number of the sections.Type: GrantFiled: June 13, 2007Date of Patent: December 7, 2010Assignee: J.P. Sercel Associates Inc.Inventors: Jongkook Park, Jeffrey P. Sercel, Patrick J. Sercel
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Publication number: 20100301027Abstract: A variable astigmatic focal beam spot is formed using lasers with an anamorphic beam delivery system. The variable astigmatic focal beam spot can be used for cutting applications, for example, to scribe semiconductor wafers such as light emitting diode (LED) wafers. The exemplary anamorphic beam delivery system comprises a series of optical components, which deliberately introduce astigmatism to produce focal points separated into two principal meridians, i.e. vertical and horizontal. The astigmatic focal points result in an asymmetric, yet sharply focused, beam spot that consists of sharpened leading and trailing edges. Adjusting the astigmatic focal points changes the aspect ratio of the compressed focal beam spot, allowing adjustment of energy density at the target without affecting laser output power. Scribing wafers with properly optimized energy and power density increases scribing speeds while minimizing excessive heating and collateral material damage.Type: ApplicationFiled: May 4, 2010Publication date: December 2, 2010Applicant: J. P. Sercel Associates Inc.Inventors: Patrick J. Sercel, Jeffrey P. Sercel, Jongkook Park
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Patent number: 7709768Abstract: A variable astigmatic focal beam spot is formed using lasers with an anamorphic beam delivery system. The variable astigmatic focal beam spot can be used for cutting applications, for example, to scribe semiconductor wafers such as light emitting diode (LED) wafers. The exemplary anamorphic beam delivery system comprises a series of optical components, which deliberately introduce astigmatism to produce focal points separated into two principal meridians, i.e. vertical and horizontal. The astigmatic focal points result in an asymmetric, yet sharply focused, beam spot that consists of sharpened leading and trailing edges. Adjusting the astigmatic focal points changes the aspect ratio of the compressed focal beam spot, allowing adjustment of energy density at the target without affecting laser output power. Scribing wafers with properly optimized energy and power density increases scribing speeds while minimizing excessive heating and collateral material damage.Type: GrantFiled: May 9, 2008Date of Patent: May 4, 2010Assignee: JP Sercel Associates Inc.Inventors: Patrick J. Sercel, Jeffrey P. Sercel, Jongkook Park
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Publication number: 20080242056Abstract: A variable astigmatic focal beam spot is formed using lasers with an anamorphic beam delivery system. The variable astigmatic focal beam spot can be used for cutting applications, for example, to scribe semiconductor wafers such as light emitting diode (LED) wafers. The exemplary anamorphic beam delivery system comprises a series of optical components, which deliberately introduce astigmatism to produce focal points separated into two principal meridians, i.e. vertical and horizontal. The astigmatic focal points result in an asymmetric, yet sharply focused, beam spot that consists of sharpened leading and trailing edges. Adjusting the astigmatic focal points changes the aspect ratio of the compressed focal beam spot, allowing adjustment of energy density at the target without affecting laser output power. Scribing wafers with properly optimized energy and power density increases scribing speeds while minimizing excessive heating and collateral material damage.Type: ApplicationFiled: May 9, 2008Publication date: October 2, 2008Applicant: J.P. SERCEL ASSOCIATES, INC.Inventors: Patrick J. Sercel, Jeffrey P. Sercel, Jongkook Park
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Patent number: 7388172Abstract: A variable astigmatic focal beam spot is formed using lasers with an anamorphic beam delivery system. The variable astigmatic focal beam spot can be used for cutting applications, for example, to scribe semiconductor wafers such as light emitting diode (LED) wafers. The exemplary anamorphic beam delivery system comprises a series of optical components, which deliberately introduce astigmatism to produce focal points separated into two principal meridians, i.e. vertical and horizontal. The astigmatic focal points result in an asymmetric, yet sharply focused, beam spot that consists of sharpened leading and trailing edges. Adjusting the astigmatic focal points changes the aspect ratio of the compressed focal beam spot, allowing adjustment of energy density at the target without affecting laser output power. Scribing wafers with properly optimized energy and power density increases scribing speeds while minimizing excessive heating and collateral material damage.Type: GrantFiled: February 19, 2004Date of Patent: June 17, 2008Assignee: J.P. Sercel Associates, Inc.Inventors: Patrick J. Sercel, Jeffrey P. Sercel, Jongkook Park
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Publication number: 20070298587Abstract: A lift off process is used to separate a layer of material from a substrate by irradiating an interface between the layer of material and the substrate. According to one exemplary process, the layer is separated into a plurality of sections corresponding to dies on the substrate and a homogeneous beam spot is shaped to cover an integer number of the sections.Type: ApplicationFiled: June 13, 2007Publication date: December 27, 2007Applicant: J.P. SERCEL ASSOCIATES INC.Inventors: Jongkook Park, Jeffrey Sercel, Patrick Sercel
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Patent number: 7241667Abstract: A lift off process is used to separate a layer of material from a substrate by irradiating an interface between the layer of material and the substrate. According to one exemplary process, the layer is separated into a plurality of sections corresponding to dies on the substrate and a homogeneous beam spot is shaped to cover an integer number of the sections.Type: GrantFiled: August 30, 2005Date of Patent: July 10, 2007Assignee: J.P. Sercel Associates, Inc.Inventors: Jongkook Park, Jeffrey P. Sercel, Patrick J. Sercel
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Patent number: 7202141Abstract: A lift off process is used to separate a layer of material from a substrate by irradiating an interface between the layer of material and the substrate. According to one exemplary process, the layer is separated into a plurality of sections corresponding to dies on the substrate and a homogeneous beam spot is shaped to cover an integer number of the sections.Type: GrantFiled: December 9, 2004Date of Patent: April 10, 2007Assignee: J.P. Sercel Associates, Inc.Inventors: Jongkook Park, Jeffrey P. Sercel, Patrick J. Sercel
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Publication number: 20060003553Abstract: A lift off process is used to separate a layer of material from a substrate by irradiating an interface between the layer of material and the substrate. According to one exemplary process, the layer is separated into a plurality of sections corresponding to dies on the substrate and a homogeneous beam spot is shaped to cover an integer number of the sections.Type: ApplicationFiled: August 30, 2005Publication date: January 5, 2006Inventors: Jongkook Park, Jeffrey Sercel, Patrick Sercel
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Publication number: 20050227455Abstract: A lift off process is used to separate a layer of material from a substrate by irradiating an interface between the layer of material and the substrate. According to one exemplary process, the layer is separated into a plurality of sections corresponding to dies on the substrate and a homogeneous beam spot is shaped to cover an integer number of the sections.Type: ApplicationFiled: December 9, 2004Publication date: October 13, 2005Inventors: Jongkook Park, Jeffrey Sercel, Patrick Sercel
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Publication number: 20040228004Abstract: A variable astigmatic focal beam spot is formed using lasers with an anamorphic beam delivery system. The variable astigmatic focal beam spot can be used for cutting applications, for example, to scribe semiconductor wafers such as light emitting diode (LED) wafers. The exemplary anamorphic beam delivery system comprises a series of optical components, which deliberately introduce astigmatism to produce focal points separated into two principal meridians, i.e. vertical and horizontal. The astigmatic focal points result in an asymmetric, yet sharply focused, beam spot that consists of sharpened leading and trailing edges. Adjusting the astigmatic focal points changes the aspect ratio of the compressed focal beam spot, allowing adjustment of energy density at the target without affecting laser output power. Scribing wafers with properly optimized energy and power density increases scribing speeds while minimizing excessive heating and collateral material damage.Type: ApplicationFiled: February 19, 2004Publication date: November 18, 2004Inventors: Patrick J. Sercel, Jeffrey P. Sercel, Jongkook Park