Patents by Inventor Jeong-Hwan Jang
Jeong-Hwan Jang 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: 11971564Abstract: A decoration element is described. The decoration element includes a light reflective layer; a light absorbing layer provided on the light reflective layer; and a color developing layer comprising a color film, wherein the color developing layer is provided: on a surface of the light reflective layer opposite to a surface of the light reflective layer facing the light absorbing layer; between the light reflective layer and the light absorbing layer; or on a surface of the light absorbing layer opposite to a surface of the light absorbing layer facing the light reflective layer.Type: GrantFiled: July 4, 2018Date of Patent: April 30, 2024Assignee: LG CHEM, LTD.Inventors: Pilsung Jo, Song Ho Jang, Yong Chan Kim, Jeong Woo Shon, Jin Suk Song, Ki Hwan Kim
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Patent number: 11476388Abstract: A semiconductor stacking structure according to the present invention comprises: a monocrystalline substrate which is disparate from a nitride semiconductor; an inorganic thin film which is formed on a substrate to define a cavity between the inorganic thin film and the substrate, wherein at least a portion of the inorganic thin film is crystallized with a crystal structure that is the same as the substrate; and a nitride semiconductor layer which is grown from a crystallized inorganic thin film above the cavity. The method and apparatus for separating a nitride semiconductor layer according the present invention mechanically separate between the substrate and the nitride semiconductor layer. The mechanical separation can be performed by a method of separation of applying a vertical force to the substrate and the nitride semiconductor layer, a method of separation of applying a horizontal force, a method of separation of applying a force of a relative circular motion, and a combination thereof.Type: GrantFiled: February 5, 2021Date of Patent: October 18, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Eui-Joon Yoon, Dae-Young Moon, Jeong-Hwan Jang, Yongjo Park, Duk-Kyu Bae
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Patent number: 11446901Abstract: A hot-stamped part according to an embodiment of the present invention comprises, as a base layer, a steel comprising: 0.28-0.38 wt % of carbon (C); 0.1-0.4 wt % of silicon (Si); 1.2-2.0 wt % of manganese (Mn); from greater than 0 to 0.020 wt % of phosphorus (P); from greater than 0 to 0.003 wt % of sulfur (S); 0.1-0.5 wt % of chromium (Cr); 0.0015-0.0040 wt % of boron (B); 0.025-0.05 wt % of titanium (Ti); and the remainder of iron (Fe) and inevitable impurities, wherein the microstructure of the base layer is full martensite.Type: GrantFiled: December 26, 2019Date of Patent: September 20, 2022Assignee: Hyundai Steel CompanyInventors: Je Youl Kong, Ji Young Kim, Young Chul Park, Hye Jin Kim, Byung Gil Yoo, Wan Yook, Seung Chae Yoon, Gi Hak Yim, Jeong Hwan Jang
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Publication number: 20220168996Abstract: A hot-stamped part according to an embodiment of the present invention comprises, as a base layer, a steel comprising: 0.28-0.38 wt % of carbon (C); 0.1-0.4 wt % of silicon (Si); 1.2-2.0 wt % of manganese (Mn); from greater than 0 to 0.020 wt % of phosphorus (P); from greater than 0 to 0.003 wt % of sulfur (S); 0.1-0.5 wt % of chromium (Cr); 0.0015-0.0040 wt % of boron (B); 0.025-0.05 wt % of titanium (Ti); and the remainder of iron (Fe) and inevitable impurities, wherein the microstructure of the base layer is full martensite.Type: ApplicationFiled: December 26, 2019Publication date: June 2, 2022Inventors: Je Youl Kong, Ji Young Kim, Young Chul Park, Hye Jin Kim, Byung Gil Yoo, Wan Yook, Seung Chae Yoon, Gi Hak Yim, Jeong Hwan Jang
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Publication number: 20210184075Abstract: A semiconductor stacking structure according to the present invention comprises: a monocrystalline substrate which is disparate from a nitride semiconductor; an inorganic thin film which is formed on a substrate to define a cavity between the inorganic thin film and the substrate, wherein at least a portion of the inorganic thin film is crystallized with a crystal structure that is the same as the substrate; and a nitride semiconductor layer which is grown from a crystallized inorganic thin film above the cavity. The method and apparatus for separating a nitride semiconductor layer according the present invention mechanically separate between the substrate and the nitride semiconductor layer. The mechanical separation can be performed by a method of separation of applying a vertical force to the substrate and the nitride semiconductor layer, a method of separation of applying a horizontal force, a method of separation of applying a force of a relative circular motion, and a combination thereof.Type: ApplicationFiled: February 5, 2021Publication date: June 17, 2021Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Eui-Joon YOON, Dae-Young MOON, Jeong-Hwan JANG, Yongjo PARK, Duk-Kyu BAE
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Patent number: 10916681Abstract: A semiconductor stacking structure according to the present invention comprises: a monocrystalline substrate which is disparate from a nitride semiconductor; an inorganic thin film which is formed on a substrate to define a cavity between the inorganic thin film and the substrate, wherein at least a portion of the inorganic thin film is crystallized with a crystal structure that is the same as the substrate; and a nitride semiconductor layer which is grown from a crystallized inorganic thin film above the cavity. The method and apparatus for separating a nitride semiconductor layer according the present invention mechanically separate between the substrate and the nitride semiconductor layer. The mechanical separation can be performed by a method of separation of applying a vertical force to the substrate and the nitride semiconductor layer, a method of separation of applying a horizontal force, a method of separation of applying a force of a relative circular motion, and a combination thereof.Type: GrantFiled: February 8, 2019Date of Patent: February 9, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Eui-Joon Yoon, Dae-Young Moon, Jeong-Hwan Jang, Yongjo Park, Duk-Kyu Bae
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Publication number: 20190189845Abstract: A semiconductor stacking structure according to the present invention comprises: a monocrystalline substrate which is disparate from a nitride semiconductor; an inorganic thin film which is formed on a substrate to define a cavity between the inorganic thin film and the substrate, wherein at least a portion of the inorganic thin film is crystallized with a crystal structure that is the same as the substrate; and a nitride semiconductor layer which is grown from a crystallized inorganic thin film above the cavity. The method and apparatus for separating a nitride semiconductor layer according the present invention mechanically separate between the substrate and the nitride semiconductor layer. The mechanical separation can be performed by a method of separation of applying a vertical force to the substrate and the nitride semiconductor layer, a method of separation of applying a horizontal force, a method of separation of applying a force of a relative circular motion, and a combination thereof.Type: ApplicationFiled: February 8, 2019Publication date: June 20, 2019Inventors: Eui-Joon YOON, Dae-Young MOON, Jeong-Hwan JANG, Yongjo PARK, Duk-Kyu BAE
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Patent number: 10205052Abstract: A semiconductor stacking structure according to the present invention comprises: a monocrystalline substrate which is disparate from a nitride semiconductor; an inorganic thin film which is formed on a substrate to define a cavity between the inorganic thin film and the substrate, wherein at least a portion of the inorganic thin film is crystallized with a crystal structure that is the same as the substrate; and a nitride semiconductor layer which is grown from a crystallized inorganic thin film above the cavity. The method and apparatus for separating a nitride semiconductor layer according the present invention mechanically separate between the substrate and the nitride semiconductor layer. The mechanical separation can be performed by a method of separation of applying a vertical force to the substrate and the nitride semiconductor layer, a method of separation of applying a horizontal force, a method of separation of applying a force of a relative circular motion, and a combination thereof.Type: GrantFiled: July 13, 2015Date of Patent: February 12, 2019Assignee: Seoul National University R&DB FoundationInventors: Eui-Joon Yoon, Dae-Young Moon, Jeong-Hwan Jang, Yongjo Park, Duk-Kyu Bae
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Patent number: 9978907Abstract: A semiconductor ultraviolet light emitting device includes: a substrate; a buffer layer disposed on the substrate and comprising a plurality of nanorods between which a plurality of voids are formed; a first conductive nitride layer disposed on the buffer layer and having a first conductive AlGaN layer; an active layer disposed on the first conductive nitride layer and having a quantum well including AlxInyGa1-x-yN (0?x+y?1, 0?y<0.15); and a second conductive nitride layer disposed on the active layer and having a second conductive AlGaN layer, in which the plurality of nanorods satisfy 3.5?n(?)×D/??5.0, where ? represents a wavelength of light generated by the active layer, n(?) represents a refractive index of the plurality of nanorods at a wavelength of ?, and D represents diameters of the plurality of nanorods.Type: GrantFiled: May 5, 2016Date of Patent: May 22, 2018Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Jung Sub Kim, Dong Hyun Lee, Jin Sub Lee, Kyung Wook Hwang, In Su Shin, Eui Joon Yoon, Gun Do Lee, Jeong Hwan Jang
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Publication number: 20170271556Abstract: A semiconductor stacking structure according to the present invention comprises: a monocrystalline substrate which is disparate from a nitride semiconductor; an inorganic thin film which is formed on a substrate to define a cavity between the inorganic thin film and the substrate, wherein at least a portion of the inorganic thin film is crystallized with a crystal structure that is the same as the substrate; and a nitride semiconductor layer which is grown from a crystallized inorganic thin film above the cavity. The method and apparatus for separating a nitride semiconductor layer according the present invention mechanically separate between the substrate and the nitride semiconductor layer. The mechanical separation can be performed by a method of separation of applying a vertical force to the substrate and the nitride semiconductor layer, a method of separation of applying a horizontal force, a method of separation of applying a force of a relative circular motion, and a combination thereof.Type: ApplicationFiled: July 13, 2015Publication date: September 21, 2017Applicants: Seoul National University R &DB Foundation, Hexasolution Co., Ltd.Inventors: Eui-Joon YOON, Dae-Young MOON, Jeong-Hwan JANG, Yongjo PARK, Duk-Kyu BAE
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Publication number: 20170054055Abstract: A semiconductor ultraviolet light emitting device includes: a substrate; a buffer layer disposed on the substrate and comprising a plurality of nanorods between which a plurality of voids are formed; a first conductive nitride layer disposed on the buffer layer and having a first conductive AlGaN layer; an active layer disposed on the first conductive nitride layer and having a quantum well including AlxInyGa1-x-yN (0?x+y?1, 0?y<0.15); and a second conductive nitride layer disposed on the active layer and having a second conductive AlGaN layer, in which the plurality of nanorods satisfy 3.5?n(?)×D/??5.0, where ? represents a wavelength of light generated by the active layer, n(?) represents a refractive index of the plurality of nanorods at a wavelength of ?, and D represents diameters of the plurality of nanorods.Type: ApplicationFiled: May 5, 2016Publication date: February 23, 2017Applicants: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Jung Sub KIM, Dong Hyun LEE, Jin Sub LEE, Kyung Wook HWANG, In Su SHIN, Eui Joon YOON, Gun Do LEE, Jeong Hwan JANG
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Publication number: 20060087180Abstract: Disclosed herein is a bi-directional operating compressor using a transverse flux linear motor, the compressor comprising: a pair of stators including a plurality of U-shape upper stator iron cores and a plurality of U-shape lower stator iron cores, and a pair of neighboring circular winding coils; a rotor placed between the pair of stators including a plurality of permanent magnets connected to iron cores, a rotor center installed between a pair of structures facing each other, a pair of supports connected to both sides of the center, and a pair of pistons connected to one side of the support respectively; and a pair of cylinders provided facing the pistons at both side ends of the rotor, for compressing air in response to the reciprocating motion of the pistons.Type: ApplicationFiled: July 1, 2005Publication date: April 27, 2006Inventors: Byung-Chul Woo, Do-Hyun Kang, Jeong-Hwan Jang, Ji-Won Kim