http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
오부국(B.K. Oh),이승기(S.K. Lee),송민규(M.K. Song),김종원(J.W. Kim),홍순국(S.K. Hong) 한국레이저가공학회 2009 한국레이저가공학회지 Vol.12 No.4
Conventional patterning based on wet-process for multi-layered film is a relatively complex and costly process though it is a necessary step for fabrication of TFT-LCD module. Recently, a direct pattering by laser has been studied because it is low cost and simple process compared to the wet process. In this work, the selective removal process of multi-layered film (polyimide/indium tin oxide/glass) is studied by modeling the thermal and mechanical behavior for multi-layered structure. Especially, the effects of thickness of polyimide layer are examined.
Fe-30 Ni-0.24C합금에서 역변태 오스테나이트의 기계적 성질에 미치는 이전가공도 및 역변태 Cycle수의 영향
김학신,이규복,홍순국 ( H . S . Kim,K . B . Lee,S . K . Hong ) 한국열처리공학회 1990 熱處理工學會誌 Vol.3 No.4
In this study, the ausformed martensite cooled to -196℃ with various deformation degrees in Fe-30%Ni-0.24%C alloy was transformed to reversed austenite at 500℃ by cyclic reverse martensitic transformation. The effects of prior deformation and the number of cyclic reverse transformation on the microstructure and the mechanical properities of reversed anstensite were investigated. Experimental results showed that the strength of reversed austenite was higer than that of original austenite. This is due to higher dislocation density and grain refining. The reversed austenite formed from ausformed martensite was highly strengthened by prior deformation. This strengthening effect of reversed austenite is attributed to higher dislocation density than grain fefining. The yield strength of reversed austenite below 30% prior deformation, but above 30% prior deformation the strength of reversed austenite is lower than that of deformed austenite. This is due to partly disappearance of strain hardening effect at higher deformation degree by reverse transformation. The strength of reversed austenite is increased with the number of cyclic transformation. Especially, it is principally strengthened by the first cyclic transformation and shows higher increase in yield strength than that of ultimate tensile strength.
고정수(J. S. Ko),오부국(B. K. Oh),김두영(D. Y. Kim),이재영(J. Y. Lee),이승기(S. K. Lee),정수화(S. H. Jung),홍순국(S. K. Hong) 한국레이저가공학회 2011 한국레이저가공학회지 Vol.14 No.3
As an active emission display using emissive polymer has had much attention recently, needs for a selective patterning of emissive layer for those displays have been increased abruptly. Therefore, the various laser sources in terms of its wavelength has been used for laser direct patterning. In this work, the feasibility of those processes is examined using numerical analysis and the experimental investigation. A sample has multi-layered structure, emissive polymer on aluminum which is deposited on a glass substrate. Key factors for optimizing the laser patterning of the emissive polymer are considered into the control of ablation products, large-sized particle, and the choice of the appropriate wavelength for minimizing the heat affected zone and the remnant layer.
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.
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.
UV 레이저를 이용한 다 층막의 선택적 직접가공 공정연구
정영모(Y. M. Jeong),안중용(J. Y. An),김두영(D. Y. Kim),백광열(K. Y. Baek),김종원(J. W. Kim),강형식(H. S. Kang),홍순국(S. K. Hong) 한국레이저가공학회 2007 한국레이저가공학회 학술대회 논문집 Vol.2007 No.-
A traditional SiNx pattern making processes require PR coating, exposure, develop, etching and PR strip. This causes high equipment cost, running cost and environment pollution. A selective layer direct patterning with mask projection method can be the good alternatives for those typical processes to overcome the above issues. The patterns on a small mask are projected onto a substrate by the almost homogenized beam of UV Excimer laser. This process can ablate only the selected layers clearly by the required depth. The experimental investigations are discussed for obtaining the optimal process condition to ablate selectively the multiple layers in this paper.