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인쇄용 롤 제작을 위한 간접식 레이저 패터닝에 관한 연구
강희신(Heeshin Kang),노지환(Jiwhan Noh),서정(Jeong Suh) 한국레이저가공학회 2012 한국레이저가공학회지 Vol.15 No.4
On behalf of the existing semiconductor process, the electronic devices to low-cost mass production to mass print the way, the research for development of roll-to-roll printing process is actively underway. This study was performed in about the research on the manufacturing technology of the printing roll used in the printing process of electronic devices. The indirect laser imprinting technology was used to create printable roll, and after coating copper on the surface of steel and thereon after coating polymer, after removing the polymer on the surface of roll, the printable roll was made. The laser system and roll feeder system were constructed and control program was developed. We has found the optimal conditions to perform laser patterning experiments using a system developed and We can make the minimum line width of 18 ㎛.
강희신(Heeshin Kang),서정(Jeong Suh),이제훈(Jaehoon Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Optimal processing and system to manufacture the laser welded tube for one-body formed bumper beam are studied. The calculated size of the tube is the thickness 1.4㎜, diameter 105.4㎜ and length 2000㎜. The tube is shaped from the cold rolled high strength steel sheet(tensile strength: 60㎏f/㎟ grade). Two-roll bending method is the optimal tube forming process. The monitoring of the welding quality and the seam tracking along the butt-joint lengthwise to the tube axis are also studied. The longitudinal butt-joint is welded by the CO₂ laser welding system equipped with the seam tracker and plasma sensor. The constructed CO₂ laser tube welding system can be used for the precision seam tracking and the real-time monitoring of the welding quality.
강희신(Heeshin Kang),서정(Jeong Suh),김태현(Taehyun Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
This paper describes the evaluation methods of welding qualities in manufacturing the laser welding parts for automobile body. A study of quality evaluation and monitoring technology for the remote laser welding was conducted. The remote laser welding and industrial robotic systems are used with robot-based laser welding systems. This paper proposes the quality monitoring system as a means of resolving the accuracy of conventional laser welding systems.
3차원 레이저 스캐너를 이용한 인쇄롤 가공에 관한 연구
강희신,노지환,손현기,Kang, Heeshin,Noh, Jiwhan,Sohn, Hyonkee 한국레이저가공학회 2013 한국레이저가공학회지 Vol.16 No.4
The research for the development of roll-to-roll printing process is actively underway on behalf of the existing semiconductor process. The roll-to-roll printing system can make the electronic devices to low-cost mass production. This study is performed for developing the manufacturing technology of the printing roll used in the printing process of electronic devices. The indirect laser engraving technology is used to create printable roll and the printable roll is made out of the chrome coated roll after coating copper and polymer on the surface of steel roll, ablating the polymer on the surface of roll and etching the roll. The 3 dimensional laser scanner and roll rotating systems are constructed and the system control program is developed. We have used the fiber laser of 100 W grade, the 3 dimensional laser scanner and the 3 axes moving stage system with a rotating axis. We have found the optimal conditions by performing the laser patterning experiments and can make the minimum line width of $24{\mu}m$ by using the developed 3 dimensional laser scanner system.
인쇄 롤의 간접식 레이저 가공을 위한 코팅과 에칭 기술
이승우,김정오,강희신,Lee, Seung-Woo,Kim, Jeong-O,Kang, HeeShin 한국레이저가공학회 2013 한국레이저가공학회지 Vol.16 No.4
For mass production of electronic devices, the processing of the printing roll is one of the most important key technologies for printed electronics technology. A roll of printing process, the gravure printing that is used to print the electronic device is most often used. The indirect laser processing has been used in order to produce printing roll for gravure printing. It consists of the following processing that is coating of photo polymer or black lacquer on the surface of printing roll, pattering using a laser beam and etching process. In this study, we have carried out study on the coating and etching for $25{\mu}m$ line width on the printing roll. To do this goals, a $4{\mu}m$ coating thickness and 20% average coating thickness of the coating homogeneity of variance is performed. The factors to determine the thickness and homogeneity are a viscosity of coating solution, the liquid injection, the number of injection, feed rate, rotational speed, and the like. After the laser patterning, a line width of $25{\mu}m$ or less was confirmed to be processed through etching and the chromium plating process.