Patents by Inventor Dong Han Kho
Dong Han Kho 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: 10011743Abstract: A dielectric adhesive film for an electronic paper display device, by which the operating performance of a flexible display device is excellent even applying a high voltage when the flexible display device is operated, by controlling a dielectric constant with respect to an adhesive film for attaching a lower electrode to which a voltage is applied with an image upper electrode on which particles, which possess electric charges with various colors that change according to an applied voltage, are coated to adjust the electric charges of the adhesive film in the thickness direction to thereby minimize loss of the applied voltage while maintaining an adhesive property and reliability.Type: GrantFiled: May 21, 2012Date of Patent: July 3, 2018Assignee: TORAY ADVANCED MATERIALS KOREA, INC.Inventors: Dong Han Kho, Sang Hoon Lee, Chang Ik Hwang, Yeon Soo Kim
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Patent number: 9793103Abstract: Provided are an epoxy composition, an adhesive film, a dicing die bonding film and a semiconductor device using the same. Specifically, the epoxy composition and a use thereof are provided, wherein the epoxy composition has a gel content of 5˜20%, measured under certain conditions. The epoxy composition according to the present invention, as an adhesive agent, shows excellent elastic properties, when prepared to have a low glass transition temperature, exhibiting good adhesion at high temperature and having minimal occurrence of burrs during processing. According to the present invention, it is therefore possible to prevent defects owing to die cut shift, during a wire bonding or molding process at high temperature, and obtain a highly reliable semiconductor device owing to the excellent adhesiveness and workability of the adhesive agent.Type: GrantFiled: June 11, 2013Date of Patent: October 17, 2017Assignee: LG Chem, Ltd.Inventors: Hyun Jee Yoo, Dong Han Kho, Jang Soon Kim, Hyo Soon Park, Jong Wan Hong, Hyo Sook Joo
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Patent number: 9695345Abstract: The present invention relates to a dicing die bonding film employed in a semiconductor packaging process, and a semiconductor device using the same. The dicing die bonding film is configured such that a ratio X/Y of adhesive power X between the wafer and the adhesive layer of the die bonding portion to tacky power Y between the die bonding portion and the tacky layer of the dicing portion is 0.15 to 1, and the adhesive layer of the die bonding portion has a storage modulus of 100 to 1000 MPa at a normal temperature. The dicing die bonding film according to the present invention reduces burr generation in dicing process, and thereby preparing a semiconductor device having excellent reliability without inferiority caused by bad connection reliability due to the burr covering a bonding pad.Type: GrantFiled: October 28, 2008Date of Patent: July 4, 2017Assignee: LG Chem, Ltd.Inventors: Hyun Jee Yoo, Jang Soon Kim, Jong Wan Hong, Hyo Soon Park, Dong Han Kho
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Patent number: 9659763Abstract: Provided are an epoxy composition, an adhesive film, a dicing die bonding film and a semiconductor device using the same. Specifically, the epoxy composition and a use thereof are provided, wherein the epoxy composition has a gel content of 5˜20%, measured under certain conditions. The epoxy composition according to the present invention, as an adhesive agent, shows excellent elastic properties, when prepared to have a low glass transition temperature, exhibiting good adhesion at high temperature and having minimal occurrence of burrs during processing. According to the present invention, it is therefore possible to prevent defects owing to die cut shift, during a wire bonding or molding process at high temperature, and obtain a highly reliable semiconductor device owing to the excellent adhesiveness and workability of the adhesive agent.Type: GrantFiled: April 24, 2009Date of Patent: May 23, 2017Assignee: LG Chem, Ltd.Inventors: Hyun Jee Yoo, Dong Han Kho, Jang Soon Kim, Hyo Soon Park, Jong Wan Hong, Hyo Sook Joo
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Publication number: 20150118432Abstract: The present disclosure provides a dielectric adhesive film for an electronic paper display device, by which the operating performance of a flexible display device is excellent even applying a high voltage when the flexible display device is operated, by controlling a dielectric constant with respect to an adhesive film for attaching a lower electrode to which a voltage is applied with an image upper electrode on which particles, which possess electric charges with various colors that change according to an applied voltage, are coated to adjust the electric charges of the adhesive film in the thickness direction to thereby minimize loss of the applied voltage while maintaining an adhesive property and reliability.Type: ApplicationFiled: May 21, 2012Publication date: April 30, 2015Inventors: Dong Han Kho, Sang Hoon Lee, Chang Ik Hwang, Yeon Soo Kim
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Patent number: 9018303Abstract: The present invention relates to an acrylic pressure-sensitive adhesive composition. More specifically, the present invention relates to an acrylic pressure-sensitive adhesive composition comprising a) acrylic copolymers; b) a hydrophilic plasticizer; and c) a hydrophobic plasticizer. The acrylic pressure-sensitive adhesive composition according to the present invention has no mura under moisture and heat resistant condition, and thus has an excellent stain resistance of adherends, and an excellent wettability, endurance reliability, transparency and adhesion reliability, regardless of whether surface property of the adherend is hydrophillic or hydrophobic.Type: GrantFiled: October 17, 2007Date of Patent: April 28, 2015Assignee: LG Chem, Ltd.Inventors: Dong Han Kho, Hyun Ju Cho, Suk Ky Chang, Jang Soon Kim, Yoon Jung Baek
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Publication number: 20130281571Abstract: Provided are an epoxy composition, an adhesive film, a dicing die bonding film and a semiconductor device using the same. Specifically, the epoxy composition and a use thereof are provided, wherein the epoxy composition has a gel content of 5˜20%, measured under certain conditions. The epoxy composition according to the present invention, as an adhesive agent, shows excellent elastic properties, when prepared to have a low glass transition temperature, exhibiting good adhesion at high temperature and having minimal occurrence of burrs during processing. According to the present invention, it is therefore possible to prevent defects owing to die cut shift, during a wire bonding or molding process at high temperature, and obtain a highly reliable semiconductor device owing to the excellent adhesiveness and workability of the adhesive agent.Type: ApplicationFiled: June 11, 2013Publication date: October 24, 2013Inventors: Hyun Jee YOO, Dong Han Kho, Jang Soon Kim, Hyo Soon Park, Jong Wan Hong, Hyo Sook Joo
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Patent number: 8541289Abstract: The present invention relates to a dicing die bonding film, which is able to maintain good workability and reliability in any semiconductor packaging process, such as adhesive property, gap filling property and pick-up property, while controlling burr incidence in a dicing process and thus contamination of die, and a dicing method. Specifically, the present invention is characterized by optimizing tensile characteristics of the dicing die bonding film, or carrying out the dicing on the parts of the die bonding film in the dicing process and separating it through an expanding process. Therefore, the present invention may regulate physical properties of films so as to have the maximized adhesive property, pick-up property and gap filling property without any specific restriction, while controlling burr incidence in the dicing process and contamination of die. As a result, workability and reliability in a packaging process may be excellently maintained.Type: GrantFiled: October 15, 2008Date of Patent: September 24, 2013Assignee: LG Chem, Ltd.Inventors: Jong Wan Hong, Jang Soon Kim, Hyo Soon Park, Hyun Jee Yoo, Dong Han Kho, Hyo Sook Joo
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Publication number: 20130171399Abstract: A dielectric adhesive film for an electronic paper display device. A lower electrode to which voltage is applied and an image upper electrode coated with charged particles whose colors are changed depending on the applied voltage are attached to the adhesive film. Thickness of the adhesive film is controlled to be uniform and constant, and a resistance value in the thickness direction of the adhesive film, i.e., a resistance value in the direction where an electric field is formed, is controlled without changing adhesive properties and reliability as the thickness of the adhesive film is controlled. Since loss of the applied voltage is minimized and the charged particles are freely driven, driving performance of the display device is excellent although a high voltage is not applied in driving a flexible display device, such as a flexible LED, an organic electro luminescence (EL) element including an electronic paper, and the like.Type: ApplicationFiled: October 19, 2011Publication date: July 4, 2013Applicant: Toray Advanced Materials Korea Inc.Inventors: Dong Han Kho, Sang Hoon Lee, Chang Ik Hwang, Yeon Soo Kim
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Patent number: 8436122Abstract: Disclosed herein is an adhesive composition for transporting a flexible substrate, which is used to manufacture a flexible display device using a flexible substrate such as a plastic substrate by using a conventional line for manufacturing a liquid crystal display device comprising a glass substrate. The present invention provides an adhesive composition for transporting a flexible substrate, which includes 100 parts by weight of an adhesive for transporting a flexible substrate and 0.001 to 5 parts by weight of an antistatic agent, an adhesive sheet containing the composition, and a method of transporting a flexible substrate using the same.Type: GrantFiled: March 22, 2007Date of Patent: May 7, 2013Assignee: LG Chem, Ltd.Inventors: Dong-Han Kho, Sang-Ki Chun, Se-Ra Kim, Suk-Ky Chang
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Patent number: 8207616Abstract: The present invention relates to an adhesive film, a dicing die bonding film and a semiconductor device. More specifically, the adhesive film of the present invention is characterized by comprising a base film and an adhesive layer and having a yield strength of 20 to 50 gf and a slope of tensile elastic region of 30 to 80 gf/mm at a thickness of 5 to 50 ?m. In the present adhesive film, the yield strength and the slope of tensile elastic region are controlled so that the incidence of burrs may be predicted and controlled depending on thickness of an adhesive layer. The dicing die bonding film, and the semiconductor device comprising the same have lower incidence of burrs and an excellent workability and reliability.Type: GrantFiled: October 24, 2008Date of Patent: June 26, 2012Assignee: LG Chem, Ltd.Inventors: Jong Wan Hong, Jang Soon Kim, Hyo Soon Park, Hyun Jee Yoo, Dong Han Kho, Hyo Sook Joo
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Patent number: 8182913Abstract: There are provided a sheet having a silicon/plastic bi-layer structure capable of easily transferring a paste even when a hard roll is used, the hard roll having excellent durability but having disadvantages that the paste is poorly transferred when the paste is printed on a plastic base, and a method for producing the same. The bi-layer structured sheet having excellent printability when printed by hard roll includes a flexible substrate and a silicon resin formed on the substrate.Type: GrantFiled: October 18, 2007Date of Patent: May 22, 2012Assignee: LG Chem, Ltd.Inventors: Sang Ki Chun, Dong Wook Lee, In Seok Hwang, Seung Wook Kim, Dong Han Kho
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Patent number: 8128773Abstract: Disclosed herein is a silicon adhesive composition for transporting a flexible substrate. The composition includes (A) 42 to 70 parts by weight of a polydiorganosiloxane containing an alkenyl group, (B) 55 to 28 parts by weight of a polyorganosiloxane copolymer including R13SiO1/2 units and SiO2 units, wherein R1 is a hydroxy group or a monovalent hydrocarbon group of 1 to 12 carbon atoms, (C) a polyorganosiloxane containing an SiH group, wherein the molar ratio of the SiH group of component (C) to the alkenyl group of component (A) is from 0.5 to 20, and (D) a platinum group catalytic compound, wherein the weight ratio of a metal component of the compound to the sum of components (A) and (B) is from 1 to 5000 ppm by weight.Type: GrantFiled: January 15, 2007Date of Patent: March 6, 2012Assignee: LG Chem, Ltd.Inventors: Sang-ki Chun, Dong-han Kho, Suk-Ky Chang
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Patent number: 8021751Abstract: There are provided a sheet having a silicon/plastic bi-layer structure capable of easily transferring a paste even when a hard roll is used, the hard roll having excellent durability but having disadvantages that the paste is poorly transferred when the paste is printed on a plastic base, and a method for producing the same. The bi-layer structured sheet having excellent printability when printed by hard roll includes a flexible substrate and a silicon resin formed on the substrate.Type: GrantFiled: October 18, 2007Date of Patent: September 20, 2011Assignee: LG Chem, Ltd.Inventors: Sang Ki Chun, Dong Wook Lee, In Seok Hwang, Seung Wook Kim, Dong Han Kho
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Publication number: 20110111218Abstract: Provided are an epoxy composition, an adhesive film, a dicing die bonding film and a semiconductor device using the same. Specifically, the epoxy composition and a use thereof are provided, wherein the epoxy composition has a gel content of 5˜20%, measured under certain conditions. The epoxy composition according to the present invention, as an adhesive agent, shows excellent elastic properties, when prepared to have a low glass transition temperature, exhibiting good adhesion at high temperature and having minimal occurrence of buns during processing. According to the present invention, it is therefore possible to prevent defects owing to die cut shift, during a wire bonding or molding process at high temperature, and obtain a highly reliable semiconductor device owing to the excellent adhesiveness and workability of the adhesive agent.Type: ApplicationFiled: April 24, 2009Publication date: May 12, 2011Applicant: LG CHEM, LTD.Inventors: Hyun Jee Yoo, Dong Han Kho, Jang Soon Kim, Hyo Soon Park, Jong Wan Hong, Hyo Sook Joo
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Publication number: 20110037180Abstract: The present invention relates to a dicing die bonding film employed in a semiconductor packaging process, and a semiconductor device using the same. The dicing die bonding film is configured such that a ratio X/Y of adhesive power X between the wafer and the adhesive layer of the die bonding portion to tacky power Y between the die bonding portion and the tacky layer of the dicing portion is 0.15 to 1, and the adhesive layer of the die bonding portion has a storage modulus of 100 to 1000 MPa at a normal temperature. The dicing die bonding film according to the present invention reduces burr generation in dicing process, and thereby preparing a semiconductor device having excellent reliability without inferiority caused by bad connection reliability due to the burr covering a bonding pad.Type: ApplicationFiled: October 28, 2008Publication date: February 17, 2011Applicant: LG CHEM, LTD.Inventors: Hyun Jee Yoo, Jang Soon Kim, Jong Wan Hong, Hyo Soon Park, Dong Han Kho
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Publication number: 20110003091Abstract: The present invention relates to an acrylic pressure-sensitive adhesive composition. More specifically, the present invention relates to an acrylic pressure-sensitive adhesive composition comprising a) acrylic copolymers; b) a hydrophilic plasticizer; and c) a hydrophobic plasticizer. The acrylic pressure-sensitive adhesive composition according to the present invention has no mura under moisture and heat resistant condition, and thus has an excellent stain resistance of adherends, and an excellent wettability, endurance reliability, transparency and adhesion reliability, regardless of whether surface property of the adherend is hydrophillic or hydrophobic.Type: ApplicationFiled: October 17, 2007Publication date: January 6, 2011Applicant: LG CHEM, LTD.Inventors: Dong Han Kho, Hyun Ju Cho, Suk Ky Chang, Jang Soon Kim, Yoon Jung Baek
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Publication number: 20100289158Abstract: The present invention relates to an adhesive film, a dicing die bonding film and a semiconductor device. More specifically, the adhesive film of the present invention is characterized by comprising a base film and an adhesive layer and having a yield strength of 20 to 50 gf and a slope of tensile elastic region of 30 to 80 gf/mm at a thickness of 5 to 50 ?m. In the present adhesive film, the yield strength and the slope of tensile elastic region are controlled so that the incidence of burrs may be predicted and controlled depending on thickness of an adhesive layer. The dicing die bonding film, and the semiconductor device comprising the same have lower incidence of burrs and an excellent workability and reliability.Type: ApplicationFiled: October 24, 2008Publication date: November 18, 2010Inventors: Jong Wan Hong, Jang Soon Kim, Hyo Soon Park, Hyun Jee Yoo, Dong Han Kho, Hyo Sook Joo
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Publication number: 20100291739Abstract: The present invention relates to a dicing die bonding film, which is able to maintain good workability and reliability in any semiconductor packaging process, such as adhesive property, gap filling property and pick-up property, while controlling burr incidence in a dicing process and thus contamination of die, and a dicing method. Specifically, the present invention is characterized by optimizing tensile characteristics of the dicing die bonding film, or carrying out the dicing on the parts of the die bonding film in the dicing process and separating it through an expanding process. Therefore, the present invention may regulate physical properties of films so as to have the maximized adhesive property, pick-up property and gap filling property without any specific restriction, while controlling burr incidence in the dicing process and contamination of die. As a result, workability and reliability in a packaging process may be excellently maintained.Type: ApplicationFiled: October 15, 2008Publication date: November 18, 2010Applicant: LG CHEM, LTD.Inventors: Jong Wan Hong, Jang Soon Kim, Hyo Soon Park, Hyun Jee Yoo, Dong Han Kho, Hyo Sook Joo
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Publication number: 20100285244Abstract: The present invention relates to an acrylic pressure sensitive adhesive composition. More specifically, the present invention relates to an acrylic pressure sensitive adhesive composition which comprises a) acrylic copolymers; and b) a compound having an ester value of 200 or more. The acrylic pressure sensitive adhesive composition of the present invention has an excellent wettability to the surface of an adhered article with surface unevenness, an excellent endurance reliability, transparency, and stain resistance of adhered article, and a high-rate release property without any considerable change of adhesive properties.Type: ApplicationFiled: October 17, 2007Publication date: November 11, 2010Inventor: Dong Han Kho