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자외선 나노초 펄스 레이저를 이용한 경연성(Rigid Flexible) 인쇄전자회로기판(Printed Circuit Board) 고속 절단에 관한 연구
배한성(Han Sung Bae),박희천(Hee Chun Park),류광현(Kwang Hyun Ryu),남기중(Gi Jung Nam) Korean Society for Precision Engineering 2010 한국정밀공학회지 Vol.27 No.2
High speed cutting processes of rigid flexible printed circuit board by making use of high power UV laser with nano-second pulse width have been proposed and investigated experimentally. Also robust laser cutting system has been designed and developed in order to obtain a good cutting quality of rigid and flexible PCB with multi-layers (2-6 layers). Power controller module developed for ourselves is adapted to control the laser output power in the range less than 1%. The systems show the good performance of cutting speed, cutting width and cutting accuracy, respectively. Especially we have confirmed that the short circuit problem due to the carbonized contamination occurred in cross section of multi-layers by thermal effect of high power laser has been improved largely by using multi-pass cutting process with low power and high speed.
강진(Jin Kang),이종문(Jong Mun Lee),강정호(Jung Ho Kang),박영철(Young Chul Park),박희천(Hee Chun Park) Korean Society for Precision Engineering 2006 한국정밀공학회지 Vol.23 No.8
Kriging model is widely used as design DACE(analysis and computer experiments) model in the field of engineering design to accomplish computationally feasible design optimization. In this paper, the optimization of gate valve was performed using Kriging based approximation model. The DACE modeling, known as the one of Kriging interpolation, is introduced to obtain the surrogate approximation model of the function. In addition, we describe the definition, the prediction function and the algorithm of Kriging method and examine the accuracy of Kriging by using validation method.