Patents by Inventor Geun Young Cha
Geun Young Cha 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).
-
Publication number: 20240075534Abstract: A coated cutting tool having excellent wear resistance and controlled brittleness is provided. An embodiment of the present disclosure provides a coated cutting tool including: a substrate; and a cutting layer disposed on the substrate, wherein: the cutting layer includes a brittleness suppressing layer and a wear-resistant layer disposed on the brittleness suppressing layer; the substrate includes a hard alloy body such as cemented carbide, cermet, ceramic, cubic boron nitride-based materials, or high-speed steel; the brittleness suppressing layer includes a first layer and a second layer disposed on the first layer; the first layer and the second layer each independently includes any one of (AlbTi1-b)X (where 0.6<b<0.8, and X is at least one selected from N, C, CN, NO, CO, and CNO) and (TicAl1-c)X (where 0.4<c?0.5, and X is at least one selected from N, C, CN, NO, CO, and CNO); and the first layer and the second layer include materials different from each other.Type: ApplicationFiled: August 15, 2023Publication date: March 7, 2024Inventors: SOO HYUN CHA, GEUN WOO PARK, SANG YOUNG JO, TAE YANG HAN
-
Patent number: 9733563Abstract: The present invention relates to a photosensitive resin composition and a photosensitive material comprising the same. The photosensitive resin composition according to an exemplary embodiment of the present invention may comprise two multi-functional monomers where structures of side chains comprising unsaturated double bonds are different from each other while a composition ratio is changed. Accordingly, in the exemplary embodiment of the present invention, processability is excellent, and it is possible to decrease defects by a rupture when a LCD substrate is sealed and substrate separation defects due to an impact to the LCD products by improving an adhesion property to a lower substrate after a hard baking process.Type: GrantFiled: January 18, 2012Date of Patent: August 15, 2017Assignee: LG CHEM, LTD.Inventors: Ho Chan Ji, Sunghyun Kim, Dongchang Choi, Kyung Soo Choi, Geun Young Cha, Sang Chul Lee
-
Patent number: 9470975Abstract: The present specification relates to a photoresist resin composition, a touch panel including a bezel pattern manufactured by using the photoresist resin composition, and a display device including the bezel pattern manufactured by using the photoresist resin composition.Type: GrantFiled: April 17, 2013Date of Patent: October 18, 2016Assignee: LG CHEM, LTD.Inventors: Dongchang Choi, Kwang Han Park, Kyung Soo Choi, Geun Young Cha, Sang Chul Lee, Heeyoung Oh
-
Publication number: 20150111009Abstract: The present specification relates to a photoresist resin composition, a touch panel including a bezel pattern manufactured by using the photoresist resin composition, and a display device including the bezel pattern manufactured by using the photoresist resin composition.Type: ApplicationFiled: April 17, 2013Publication date: April 23, 2015Applicant: LG CHEM, LTD.Inventors: Dongchang Choi, Kwang Han Park, Kyung Soo Choi, Geun Young Cha, Sang Chul Lee, Heeyoung Oh
-
Patent number: 8822127Abstract: A photosensitive resin composition for a black matrix and a black matrix formed with the same are provided. The photosensitive resin composition for a black matrix includes a solvent consisting of 5-30 weight % of a first solvent having a boiling point of 110-159° C., 55-90 weight % of a second solvent having a boiling point of 160-200° C., and 3-15 weight % of a third solvent having a boiling point of 201-280° C., and the first solvent, the second solvent, and the third solvent are an aliphatic compound and use at least one solvent composition selected from a group consisting of alkyl ester, alkyl ketone, alkyl ether, and alkyl alcohol, and thus a uniform thin film having no surface defect can be obtained, and the photosensitive resin composition has an excellent process property while securing a high light shielding property and thus a black matrix pattern having a few defect can be obtained, and is thus useful for a liquid crystal display.Type: GrantFiled: September 28, 2009Date of Patent: September 2, 2014Assignee: LG Chem, Ltd.Inventors: Dong Chang Choi, Kyung Soo Choi, Ho Chan Ji, Geun Young Cha, Sung-Hyun Kim
-
Patent number: 8822132Abstract: A colored dispersion according to the present invention comprises a resin including monomers of Formulas 1 to 4, as a binder resin. Accordingly, a photoresist composition for a black matrix of a high light shielding property, which has the dispersion stability of the colored dispersion according to the present invention, could be provided, and a black matrix of high sensibility having an uniform process characteristic while maintaining a high light-shielding property could be produced.Type: GrantFiled: November 10, 2008Date of Patent: September 2, 2014Assignee: LG Chem, Ltd.Inventors: Dong-Chang Choi, Kyung-Soo Choi, Ho-Chan Ji, Geun-Young Cha, Min-Young Lim, Sung-Hyun Kim, Han-Soo Kim, Yoon-Hee Heo, Ji-Heum Yoo
-
Patent number: 8597861Abstract: The present invention relates to a method for manufacturing a color filter and a color filter manufactured by using the same. More particularly, the present invention pertains to a method for manufacturing a color filter, which includes performing plasma treatment of a black matrix (BM) pattern formed on a substrate to increase a difference in ink repellency of the black matrix pattern and a pixel unit, and a color filter manufactured by using the same. When the production method of the present invention is used, it is possible to provide the color filter in which color mixing does not occur in a pixel unit or between pixel units during discharging of ink by using an inkjet printing process, discoloration due to unfilling does not occur, a surface is uniform, and there is an insignificant step in the pixel unit or between the pixel units.Type: GrantFiled: March 6, 2008Date of Patent: December 3, 2013Assignee: LG Chem, Ltd.Inventors: Dae-Hyun Kim, Dong-Chang Choi, Kyung-Soo Choi, Ho-Chan Ji, Hyun-Sik Kim, Geun-Young Cha, Sung-Hyun Kim, Jae-Joon Kim, Min-A Yu, Mi-Ae Kim, Mi-Kyoung Kim
-
Patent number: 8535874Abstract: Provided is a novel fluorene-based polymer having urethane bonds and a method for preparing the fluorene-based polymer. According to the method, a diol compound is condensed with a diisocyanate instead of an acid dianhydride, and then an acid anhydride is reacted with the reaction mixture to introduce desired acid groups into the final polymer. Further provided is a negative-type photosensitive resin composition comprising of the fluorene-based polymer as a binder resin. The composition exhibits improved chemical resistance, good development margin and high sensitivity due to presence of the acid groups despite the low molecular weight of the fluorene-based polymer.Type: GrantFiled: September 26, 2008Date of Patent: September 17, 2013Assignee: LG Chem, Ltd.Inventors: Han Soo Kim, Sung Hyun Kim, Dong Chang Choi, Kyung Soo Choi, Ho Chan Ji, Min Young Lim, Geun Young Cha, Yoon Hee Heo, Ji Heum Yoo, Sun Hwa Kim
-
Publication number: 20120189961Abstract: The present invention relates to a photosensitive resin composition and a photosensitive material comprising the same. The photosensitive resin composition according to an exemplary embodiment of the present invention may comprise two multi-functional monomers where structures of side chains comprising unsaturated double bonds are different from each other while a composition ratio is changed. Accordingly, in the exemplary embodiment of the present invention, processability is excellent, and it is possible to decrease defects by a rupture when a LCD substrate is sealed and substrate separation defects due to an impact to the LCD products by improving an adhesion property to a lower substrate after a hard baking process.Type: ApplicationFiled: January 18, 2012Publication date: July 26, 2012Applicant: LG CHEM, LTD.Inventors: Ho Chan JI, Sunghyun KIM, Dongchang CHOI, Kyung Soo CHOI, Geun Young CHA, Sang Chul LEE
-
Publication number: 20110151379Abstract: The present invention relates to a black matrix photosensitive resin composition having high light-shielding and improved adhesion properties and a black matrix for a liquid crystal display including the same. The black matrix photosensitive resin composition comprises an alkali-soluble binder resin, a multi-functional monomer having an ethylenic unsaturated double bond, a photopolymerization initiator, an adhesion accelerator, a solvent, and a colorant comprising black pigments. A Cardo type binder is mixed in an amount of 10 to 90 wt % and an acryl type binder is mixed in an amount of 10 to 90 wt % based on a total weight of the alkali-soluble binder resin including the Cardo type binder and the acryl type binder.Type: ApplicationFiled: December 10, 2010Publication date: June 23, 2011Applicant: LG CHEM, LTD.Inventors: Dong Chang Choi, Kyung Soo Choi, Ho Chan Ji, Geun Young Cha, Sang Chul Lee
-
Publication number: 20110101268Abstract: A photosensitive resin composition for a black matrix and a black matrix formed with the same are provided. The photosensitive resin composition for a black matrix includes a solvent consisting of 5-30 weight % of a first solvent having a boiling point of 110-159° C., 55-90 weight % of a second solvent having a boiling point of 160-200° C., and 3-15 weight % of a third solvent having a boiling point of 201-280° C., and the first solvent, the second solvent, and the third solvent are an aliphatic compound and use at least one solvent composition selected from a group consisting of alkyl ester, alkyl ketone, alkyl ether, and alkyl alcohol, and thus a uniform thin film having no surface defect can be obtained, and the photosensitive resin composition has an excellent process property while securing a high light shielding property and thus a black matrix pattern having a few defect can be obtained, and is thus useful for a liquid crystal display.Type: ApplicationFiled: September 28, 2009Publication date: May 5, 2011Applicant: LG CHEM, LTD.Inventors: Dong Chang Choi, Kyung Soo Choi, Ho Chan Ji, Geun Young Cha, Sung-Hyun Kim
-
Publication number: 20100201925Abstract: Provided is a novel fluorene-based polymer having urethane bonds and a method for preparing the fluorene-based polymer. According to the method, a diol compound is condensed with a diisocyanate instead of an acid dianhydride, and then an acid anhydride is reacted with the reaction mixture to introduce desired acid groups into the final polymer. Further provided is a negative-type photosensitive resin composition comprising of the fluorene-based polymer as a binder resin. The composition exhibits improved chemical resistance, good development margin and high sensitivity due to presence of the acid groups despite the low molecular weight of the fluorene-based polymer.Type: ApplicationFiled: September 26, 2008Publication date: August 12, 2010Applicant: LG CHEM LTD.Inventors: Han Soo Kim, Sung Hyun Kim, Dong Chang Choi, Kyung Soo Choi, Ho Chan Ji, Min Young Lim, Geun Young Cha, Yoon Hee Heo, Ji Heum Yoo, Sun Hwa Kim
-
Publication number: 20100104981Abstract: A colored dispersion according to the present invention comprises a resin including monomers of Formulas 1 to 4, as a binder resin. Accordingly, a photoresist composition for a black matrix of a high light shielding property, which has the dispersion stability of the colored dispersion according to the present invention, could be provided, and a black matrix of high sensibility having an uniform process characteristic while maintaining a high light-shielding property could be produced.Type: ApplicationFiled: November 10, 2008Publication date: April 29, 2010Inventors: Dong Chang Choi, Kyung Soo Choi, Ho Chan Ji, Geun Young Cha, Min Young Lim, Sung Hyun Kim, Han soo Kim, Yoon Hee Heo, Ji Heum Yoo
-
Publication number: 20100085518Abstract: The present invention relates to a photosensitive resin composition for a black matrix, a black matrix produced by the composition and a liquid crystal display including the black matrix. The resin composition for a black matrix comprising a fluorene-based resin polymer as a resin binder has high sensitivity and optical density, and excellent development adherence.Type: ApplicationFiled: February 21, 2008Publication date: April 8, 2010Inventors: Kyung-Soo Choi, Yoon-Hee Heo, Dong-Chang Choi, Ho-Chan Ji, Geun-Young Cha, Dae-Hyun Kim
-
Publication number: 20100062377Abstract: The present invention relates to a method for manufacturing a color filter and a color filter manufactured by using the same. More particularly, the present invention pertains to a method for manufacturing a color filter, which includes performing plasma treatment of a black matrix (BM) pattern formed on a substrate to increase a difference in ink repellency of the black matrix pattern and a pixel unit, and a color filter manufactured by using the same. When the production method of the present invention is used, it is possible to provide the color filter in which color mixing does not occur in a pixel unit or between pixel units during discharging of ink by using an inkjet printing process, discoloration due to unfilling does not occur, a surface is uniform, and there is an insignificant step in the pixel unit or between the pixel units.Type: ApplicationFiled: March 6, 2008Publication date: March 11, 2010Applicant: LG CHEM, LTD.Inventors: Dae-Hyun Kim, Dong-Chang Choi, Kyung-Soo Choi, Ho-Chan Ji, Hyun-Sik Kim, Geun-Young Cha, Sung-Hyun Kim, Jae-Joon Kim, Min-A Yu, Mi-Ae Kim, Mi-Kyoung Kim
-
Patent number: 7556910Abstract: The present invention relates to a photosensitive composition comprising a triazine-based photoactive compound containing oxime ester. The photosensitive composition according to the present invention has good sensitivity, retention rate, mechanical strength, heat resistance, chemical resistance and developing durability since it contains, as photopolymerization initiator, a compound having an oxime ester group and a triazine group in one molecule and thus effectively absorbs UV radiation. Therefore, the photosensitive composition according to the present invention is advantageous not only in curing of materials for color filters, resin black matrixes, column spacers, overcoats and passivation films of liquid crystal displays, but also in high temperature process characteristics.Type: GrantFiled: November 29, 2006Date of Patent: July 7, 2009Assignee: LF Chem, Ltd.Inventors: Sung Hyun Kim, Kyung Jun Kim, Dong Chang Choi, Jeong Ae Yoon, Hee Kwan Park, Geun Young Cha, Keon Woo Lee, Il Eok Kwon, Dong Kung Oh, Jong Hyun Park, Xiang Li Li, Han Soo Kim, Min Young Lim, Chang Ho Cho