Patents by Inventor Chang-Mo Ko
Chang-Mo Ko 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: 8648257Abstract: An insulation material composition for a direct current (DC) power cable and the DC power cable using the same are provided. A direct current (DC) power cable insulation material composition includes 0.5 to 5 parts by weight of surface-modified nano-sized cubic magnesium oxide, per 100 parts by weight of a polyethylene base resin.Type: GrantFiled: September 9, 2011Date of Patent: February 11, 2014Assignee: LS Cable & System Ltd.Inventors: Yoon-Jin Kim, Chang-Mo Ko, Jin-Ho Nam, Ho-Souk Cho, Young-Ho Park
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Patent number: 8545731Abstract: A conductive paste containing silver nanoparticles and a conductive circuit board provided therewith are provided. The conductive paste containing silver nanoparticles includes 15 to 50 weight % of silver nanoparticles based on a total weight of the conductive paste, the silver nanoparticles having an average particle size of 1 to 100 nm; 0.1 to 2.5 weight % of carbon nanotubes based on the total weight of the conductive paste, the carbon nanotubes having an average diameter of 2 to 40 nm; 1 to 15 weight % of a binder based on the total weight of the conductive paste; and a solvent.Type: GrantFiled: June 7, 2011Date of Patent: October 1, 2013Assignee: LS Cable & System, LtdInventors: Yoon-Jin Kim, Chang-Mo Ko, Ho-Souk Cho
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Patent number: 8501049Abstract: A semiconductive composition and a power cable using the same are provided. A semiconductive composition includes, per 100 parts by weight of a polyolefin base resin, 0.5 to 2.15 parts by weight of carbon nanotubes, and 0.1 to 1 parts by weight of an organic peroxide crosslinking agent.Type: GrantFiled: September 15, 2011Date of Patent: August 6, 2013Assignee: LS Cable & System Ltd.Inventors: Yoon-Jin Kim, Chang-Mo Ko, Ung Kim
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Patent number: 8481860Abstract: A conductive paste composition is provided. The conductive paste composition includes 20 to 70 weight % of silver nanoparticles having an average particle size of 1 nm to 250 nm based on a total weight of the conductive paste composition, and 0.01 to 2 weight % of silver-decorated carbon nanotubes based on the total weight of the conductive paste composition.Type: GrantFiled: June 7, 2011Date of Patent: July 9, 2013Assignee: LS Cable & System, LtdInventors: Yoon-Jin Kim, Chang-Mo Ko, Ho-Souk Cho
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Publication number: 20120000694Abstract: An insulation material composition for a direct current (DC) power cable and the DC power cable using the same are provided. A direct current (DC) power cable insulation material composition includes 0.5 to 5 parts by weight of surface-modified nano-sized cubic magnesium oxide, per 100 parts by weight of a polyethylene base resin.Type: ApplicationFiled: September 9, 2011Publication date: January 5, 2012Applicant: LS CABLE & SYSTEM LTD.Inventors: Yoon-Jin Kim, Chang-Mo Ko, Jin-Ho Nam, Ho-Souk Cho, Young-Ho Park
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Publication number: 20120001128Abstract: A semiconductive composition and a power cable using the same are provided. A semiconductive composition includes, per 100 parts by weight of a polyolefin base resin, 0.5 to 2.15 parts by weight of carbon nanotubes, and 0.1 to 1 parts by weight of an organic peroxide crosslinking agent.Type: ApplicationFiled: September 15, 2011Publication date: January 5, 2012Applicant: LS CABLE & SYSTEM LTD.Inventors: Yoon-Jin Kim, Chang-Mo Ko, Ung Kim
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Publication number: 20110260115Abstract: A conductive paste containing silver nanoparticles and a conductive circuit board provided therewith are provided. The conductive paste containing silver nanoparticles includes 15 to 50 weight % of silver nanoparticles based on a total weight of the conductive paste, the silver nanoparticles having an average particle size of 1 to 100 nm; 0.1 to 2.5 weight % of carbon nanotubes based on the total weight of the conductive paste, the carbon nanotubes having an average diameter of 2 to 40 nm; 1 to 15 weight % of a binder based on the total weight of the conductive paste; and a solvent.Type: ApplicationFiled: June 7, 2011Publication date: October 27, 2011Applicant: LS CABLE & SYSTEM, LTDInventors: Yoon-Jin Kim, Chang-Mo Ko, Ho-Souk Cho
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Publication number: 20110247866Abstract: A conductive paste composition is provided. The conductive paste composition includes 20 to 70 weight % of silver nanoparticles having an average particle size of 1 nm to 250 nm based on a total weight of the conductive paste composition, and 0.01 to 2 weight % of silver-decorated carbon nanotubes based on the total weight of the conductive paste composition.Type: ApplicationFiled: June 7, 2011Publication date: October 13, 2011Applicant: LS CABLE & SYSTEM, LTDInventors: Yoon-Jin Kim, Chang-Mo Ko, Ho-Souk Cho
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Publication number: 20070103269Abstract: A thermistor, which is to be mounted on a PCB, for protecting other circuit elements is disclosed. Electrode patterns separately formed on both surfaces of a film resistance element are respectively shaped into two parts which are engaged to each other with a non-conductive gap interposed therebetween. Thus, a Tombstone phenomenon caused by asymmetric structure may be fundamentally prevented. Grooves are formed in both sides of the thermistor, and connection portions for electrically connecting the electrodes formed on both surfaces of the thermistor are formed through the inside of the grooves or through the sides except the grooves. Thus, though a crack arises in the connection portion, it is possible to prevent the crack from being propagated to the entire connection portion along the side of the thermistor.Type: ApplicationFiled: December 19, 2006Publication date: May 10, 2007Inventors: Jun-Ku Han, Su-An Choi, Chang-Mo Ko, An-Na Lee, Jong-Hwan Lee, Ju-Dam Kim, Jong-Ho Lee, Dong-Hyun Kim
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Patent number: 7173512Abstract: A thermistor of which resistance is changed depending on temperature and a secondary battery to which the thermistor is attached are disclosed. The thermistor is attached to an object via a lead which is made of different kinds of materials. The lead is configured so that a part of the lead to be united to the thermistor electrode is mainly made of the same material as the electrode and a part of the lead to be united to the object is mainly made of the same material as the surface of the object. Thus, the thermistor may be simply attached to the object only using the ultrasonic welding, thereby remarkably reducing junction inferiorities.Type: GrantFiled: July 9, 2004Date of Patent: February 6, 2007Assignee: LG Cable, Ltd.Inventors: Chang-Mo Ko, Su-An Choi, Jun-Ku Han, An-Na Lee, Jong-Hwan Lee, Ju-Dam Kim, Jong-Ho Lee, Jong-Seo Yoon
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Patent number: 7173511Abstract: A thermistor, which is to be mounted on a PCB, for protecting other circuit elements is disclosed. Electrode patterns separately formed on both surfaces of a film resistance element are respectively shaped into two parts which are engaged to each other with a non-conductive gap interposed therebetween. Thus, a Tombstone phenomenon caused by asymmetric structure may be fundamentally prevented. Grooves are formed in both sides of the thermistor, and connection portions for electrically connecting the electrodes formed on both surfaces of the thermistor are formed through the inside of the grooves or through the sides except the grooves. Thus, though a crack arises in the connection portion, it is possible to prevent the crack from being propagated to the entire connection portion along the side of the thermistor.Type: GrantFiled: June 1, 2004Date of Patent: February 6, 2007Assignee: LG Cable Ltd.Inventors: Jun-Ku Han, Su-An Choi, Chang-Mo Ko, An-Na Lee, Jong-Hwan Lee, Ju-Dam Kim, Jong-Ho Lee, Dong-Hyun Kim
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Patent number: 7145431Abstract: A thermistor is disclosed, which comprises a resistance element having upper and lower surfaces and showing a resistance varying characteristics according to the change of temperature; first and second conductive layers formed on the upper surface of the resistance element and engaged to each other with a non-conductive gap interposed therebetween; first and second electrodes formed on the lower surface of the resistance element and electrically separated from each other; a first connector for electrically connecting the first conductive layer to the first electrode; and a second connector for electrically connecting the second conductive layer to the second electrode. Thus, the thermistor has a structurally point-symmetric shape, so it is possible to prevent the Tombstone phenomenon, caused by an asymmetric structure.Type: GrantFiled: November 28, 2003Date of Patent: December 5, 2006Assignee: LG Cable, Ltd.Inventors: Jun-Ku Han, Su-An Choi, Chang-Mo Ko, An-Na Lee, Jong-Hwan Lee, Ju-Dam Kim, Jong-Ho Lee
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Patent number: 7041238Abstract: PTC conductive polymer composition includes organic polymer containing polyolefin components essentially consisting of 30˜40 w % high density polyethylene (HDPE), 20˜40 w % low density polyethylene (LDPE) and 10˜30 w % ethylene-acrylic-acid (EAA) or ethylene-vinyl-acetate (EVA), and 20˜30 w % high or low density polyethylene which is denaturated into maleic anhydride compound; 60˜120 w % electrical conductive particles dispersed into the organic polymer, the electrical conductive particles by weight of the organic polymer; and 0.2˜0.5 w % peroxidic cross-linking agent added for cross-linking reaction by weight of the organic polymer. Thus, it becomes possible to control PTC characteristics such as switching temperature and trip time of an electrical device by suitably adjusting an added amount of the polyethylene, which is denaturated into maleic anhydride compound.Type: GrantFiled: April 25, 2002Date of Patent: May 9, 2006Assignee: LG Cable Ltd.Inventors: Do-Yun Kim, Jong-Ho Lee, Soo-An Choi, Joon-Koo Han, Chang-Mo Ko
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Publication number: 20050206494Abstract: A thermistor of which resistance is changed depending on temperature and a secondary battery to which the thermistor is attached are disclosed. The thermistor is attached to an object via a lead which is made of different kinds of materials. The lead is configured so that a part of the lead to be united to the thermistor electrode is mainly made of the same material as the electrode and a part of the lead to be united to the object is mainly made of the same material as the surface of the object. Thus, the thermistor may be simply attached to the object only using the ultrasonic welding, thereby remarkably reducing junction inferiorities.Type: ApplicationFiled: July 9, 2004Publication date: September 22, 2005Inventors: Chang-Mo Ko, Su-An Choi, Jun-Ku Han, An-Na Lee, Jong-Hwan Lee, Ju-Dam Kim, Jong-Ho Lee, Jong-Seo Yoon
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Publication number: 20050079422Abstract: Disclosed is a lithium secondary battery with high stability and excellent performance, and its manufacturing method. The lithium secondary battery includes a positive electrode including a positive electrode active material, a conductive material and a binding material and a negative electrode including a negative electrode active material and a binding material, and PTC powder is contained in at least one of the positive electrode and the negative electrode. If the battery is overheated due to overcharge, the PTC powder contained in the positive electrode and/or the negative electrode abruptly increases electric resistance to break electric current, thereby preventing further increase of temperature and resultantly preventing fire or explosion. In addition, the conductive material is contained separately from the PTC powder, performance of the battery is not deteriorated in the normal operation.Type: ApplicationFiled: October 4, 2004Publication date: April 14, 2005Inventors: Chang-Mo Ko, Ju-Dam Kim, Anna Lee, Su-An Choi, Jun-Ku Han, Jong-Hwan Lee
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Publication number: 20050057338Abstract: A thermistor, which is to be mounted on a PCB, for protecting other circuit elements is disclosed. Electrode patterns separately formed on both surfaces of a film resistance element are respectively shaped into two parts which are engaged to each other with a non-conductive gap interposed therebetween. Thus, a Tombstone phenomenon caused by asymmetric structure may be fundamentally prevented. Grooves are formed in both sides of the thermistor, and connection portions for electrically connecting the electrodes formed on both surfaces of the thermistor are formed through the inside of the grooves or through the sides except the grooves. Thus, though a crack arises in the connection portion, it is possible to prevent the crack from being propagated to the entire connection portion along the side of the thermistor.Type: ApplicationFiled: June 1, 2004Publication date: March 17, 2005Inventors: Jun-Ku Han, Su-An Choi, Chang-Mo Ko, An-Na Lee, Jong-Hwan Lee, Ju-Dam Kim, Jong-Ho Lee, Dong-Hyun Kim
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Publication number: 20040232387Abstract: PTC conductive polymer composition includes organic polymer containing polyolefin components essentially consisting of 30˜40 w % high density polyethylene (HDPE), 20˜40 w % low density polyethylene (LDPE) and 10˜30 w % ethylene-acrylic-acid (EAA) or ethylene-vinyl-acetate (EVA), and 20˜30 w % high or low density polyethylene which is denaturated into maleic anhydride compound; 60˜120 w % electrical conductive particles dispersed into the organic polymer, the electrical conductive particles by weight of the organic polymer; and 0.2˜0.5 w % peroxidic cross-linking agent added for cross-linking reaction by weight of the organic polymer. Thus, it becomes possible to control PTC characteristics such as switching temperature and trip time of an electrical device by suitably adjusting an added amount of the polyethylene, which is denaturated into maleic anhydride compound.Type: ApplicationFiled: February 25, 2004Publication date: November 25, 2004Inventors: Do-Yun Kim, Jong-Ho Lee, Soo-An Choi, Joon-Koo Han, Chang-Mo Ko
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Publication number: 20040108936Abstract: A thermistor is disclosed, which comprises a resistance element having upper and lower surfaces and showing a resistance varying characteristics according to the change of temperature; first and second conductive layers formed on the upper surface of the resistance element and engaged to each other with a non-conductive gap interposed therebetween; first and second electrodes formed on the lower surface of the resistance element and electrically separated from each other; a first connector for electrically connecting the first conductive layer to the first electrode; and a second connector for electrically connecting the second conductive layer to the second electrode. Thus, the thermistor has a structurally point-symmetric shape, so it is possible to prevent the Tombstone phenomenon, caused by an asymmetric structure.Type: ApplicationFiled: November 28, 2003Publication date: June 10, 2004Inventors: Jun-Ku Han, Su-An Choi, Chang-Mo Ko, An-Na Lee, Jong-Hwan Lee, Ju-Dam Kim, Jong-Ho Lee