1. Department of Mechanical Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangrok-gu, Ansan, Gyeonggi-do 15588, Korea
2. Inkjet Technology Team, LG Production Engineering Research Institute, 222 LG-ro, Jinwi-myeon, Pyeongtaek, Gyeonggi-do 17709, Korea