5:30 PM - 5:45 PM ▲ [6p-A410-10] Real-time determination of focal position during laser fabrication with double-hole masks 〇(D)Binh Xuan Cao1,2, Phuong Le Hoang3, Jiwhan Noh1,2 (1.UST, 2.KIMM, 3.Kaist)