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피코초 레이저를 이용한 양극산화 알루미늄 미세 홀 가공의 실험적 연구
오부국,방준호,김종기,임성묵,이승기,정수화,홍순국,Oh, B.K.,Bang, J.H.,Kim, J.K.,Lim, S.M.,Lee, S.K.,Jeong, S.H.,Hong, S.K. 한국레이저가공학회 2014 한국레이저가공학회지 Vol.17 No.2
Aluminum has been widely used in the electric applications because of light metals. When mechanical element is periodically moving with contacting other surfaces, the anodizing process for aluminum is useful for avoiding the abrasive damage. The anodized element has quietly different characteristics with respect to the distribution of hardness and crystal structure. In this work, the laser drilling of anodized surface is studied experimentally. Fusion drilling method - laser drilling with inert gas blowing - is used. The effect of various process parameters (gas pressure, laser power, focus position) is investigated with respect to the hole size and circularity.
LCD 패널 Review & Repair 장비의 결함수정 자동화 알고리즘
이우철(W.C. Lee),임성묵(S.M. Lim),이승기(S.K. Lee),정수화(S.H. Jeong),홍순국(S.K. Hong) 한국레이저가공학회 2012 한국레이저가공학회지 Vol.15 No.1
In TFT-LCD manufacturing process, various defects are generated by manufacturing machine trouble or particle. These defects can be repaired through the TFT-Laser repair process that only can't be automated in TFT-LCD manufacturing Process. In this Paper, we propose auto defect algorithm for TFT-LCD laser repair machine using image processing algorithm in order to automate process. Proposed algorithm can detect very small defects (< 2um) in 98% success ratio, and generated laser repair path guarantee highly precise position accuracy. Through proposed system, much of the work still done the old-fashioned way, by hand, can be automated and manufacturing company can be strengthed the competitiveness of cost.