Patents Assigned to LTC CO., LTD.
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Patent number: 12429777Abstract: The present invention relates to a photoresist stripper composition for manufacturing a display, and more particularly, to an integrated photoresist stripper composition which can be used in every process for manufacturing a display. More specifically, the photoresist stripper composition for manufacturing a display according to the present invention can be applied to all of transition metals and oxide semiconductor wirings, and has an excellent ability to remove modified photoresist after a hard bake process, and implant process, and a dry etch process have been performed. In particular, the photoresist stripper composition for manufacturing a display according to the present invention exhibits a corrosion inhibitory effect that has been further specialized for copper (Cu) wiring pattern edge portions which are susceptible to corrosion following dry-etching.Type: GrantFiled: November 18, 2020Date of Patent: September 30, 2025Assignee: LTC CO., LTD.Inventors: Ho Sung Choi, Kyu Sang Kim, Jong Soon Lee, Sang Ku Ha, Byeong Woo Jeon, Yun Mo Yang, Ki Cheon Byun, Yeon Soo Choi, Seon Jeong Kim
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Patent number: 11092895Abstract: The present invention relates to a peeling solution composition for dry film resist, which is usable for manufacturing a PCB for forming a microcircuit, and particularly is applicable for a process of manufacturing a flexible multi-layer PCB.Type: GrantFiled: April 16, 2019Date of Patent: August 17, 2021Assignee: LTC Co., Ltd.Inventors: Hosung Choi, Kyusang Kim, Jongil Bae, Jongsoon Lee, Sangku Ha, Yunmo Yang
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Patent number: 10859917Abstract: The present disclosure relates to a photoresist stripper composition for manufacturing an LCD, and relates to an integrated photoresist stripper composition capable of being used in all processes for manufacturing a TFT-LCD. More specifically, the present disclosure relates to an aqueous photoresist stripper composition capable of being used in all of transition metal, potential metal and oxide semiconductor wires.Type: GrantFiled: August 10, 2016Date of Patent: December 8, 2020Assignee: LTC CO., LTD.Inventors: Ho-Sung Choi, Kwang-Hyun Ryu, Jong-Il Bae, Jong-Soon Lee, Sang-Ku Ha, Hye-Sung Yang, Mi-Yeon Han, Hyo-Jin Lee
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Publication number: 20200272056Abstract: The present invention relates to a peeling solution composition for dry film resist, which is usable for manufacturing a PCB for forming a microcircuit, and particularly is applicable for a process of manufacturing a flexible multi-layer PCB.Type: ApplicationFiled: April 16, 2019Publication date: August 27, 2020Applicant: LTC CO., LTD.Inventors: HOSUNG CHOI, KYUSANG KIM, JONGIL BAE, JONGSOON LEE, SANGKU HA, YUNMO YANG
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Patent number: 10494483Abstract: A photosensitive resin composition, an organic light emitting display device, and method for manufacturing an organic light emitting device, the composition including a photosensitive compound; a solvent; and a silsesquioxane-based copolymer, the silsesquioxane-based copolymer being obtained by copolymerizing a compound represented by the following Chemical Formula 1 with at least one of a compound represented by the following Chemical Formula 2, and a compound represented by the following Chemical Formula 3; R1—R2—Si(R3)3??[Chemical Formula 1] R4—Si(R5)3??[Chemical Formula 2] Si(R6)4.Type: GrantFiled: January 27, 2017Date of Patent: December 3, 2019Assignees: Samsung Display Co., Ltd., LTC Co., Ltd.Inventors: Jeong Won Kim, Jun Hyuk Woo, Jin Ho Ju, Beung Hwa Jeong, Jun-young Kim, Hwa-young Kim, Ho-Sung Choi
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Patent number: 10409162Abstract: The present invention relates to a highly heat resistant silsesquioxane-based photosensitive resin composition for a liquid crystal display device or an organic EL display device, and a positive resist insulating layer prepared therefrom, and in particular, to a silsesquioxane-based photosensitive resin composition having high heat resistance and a low dielectric property, capable of being used as an insulating layer forming a via hole of the thin film transistor (TFT), and simultaneously, capable of being used as an insulating layer for forming a bank pattern dividing pixels of an organic EL display device.Type: GrantFiled: August 28, 2015Date of Patent: September 10, 2019Assignee: LTC CO., LTD.Inventors: Jun Young Kim, Hwa Young Kim, Sang Hun Cho, Kwang Hyun Ryu, Ho Sung Choi
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Patent number: 9360761Abstract: The present invention relates to a photoresist stripping composition for all process of manufacturing LCD, more specifically to a water-borne united photoresist stripping composition, as a weak basic composite comprising a tertiary alkanolamine, water, and an organic solvent. The composition according to the present invention prevents a corrosion of Al and Cu metal wiring in process of manufacturing LCD, has a good capability of removing photoresist, and is applied to all Al process, Cu process, an organic film process, and COA process.Type: GrantFiled: August 19, 2010Date of Patent: June 7, 2016Assignee: LTC Co., Ltd.Inventor: Ho Sung Choi
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Patent number: 9353339Abstract: The present invention proposes a method for removing an oxide formed on the surface of a copper film used in the process of manufacturing a circuit for a semiconductor, an organic light-emitting diode, an LED, or a liquid crystal display without causing corrosion on a lower metal film. The composition including corrosive amine may remove a metal oxide depending on the content of additive ranging from 0.01 to 10% regardless of the content of ultrapure water. A polar solvent other than the corrosive amine may efficiently remove an oxide from the surface of the metal when the same contains water and 0.01 to 20% of the additive.Type: GrantFiled: July 24, 2013Date of Patent: May 31, 2016Assignee: LTC Co., Ltd.Inventors: Ho Sung Choi, Kwang Hyun Ryu, Jong Il Bae, Jong Soon Lee, Hye Sung Yang, Sang Ku Ha
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Publication number: 20130345106Abstract: The present invention relates to a photoresist stripping composition for all process of manufacturing LCD, more specifically to a water-borne united photoresist stripping composition, as a weak basic composite comprising a tertiary alkanolamine, water, and an organic solvent. The composition according to the present invention prevents a corrosion of Al and Cu metal wiring in process of manufacturing LCD, has a good capability of removing photoresist, and is applied to all Al process, Cu process, an organic film process, and COA process.Type: ApplicationFiled: August 19, 2010Publication date: December 26, 2013Applicant: LTC CO., LTD.Inventor: Ho Sung Choi