PCB single-sided or double-sided board production are in the blanking directly after the non-vias or vias drilling, multi-layer board is completed after the pressure plate to drill. The traditional types of holes divided by the simple distinction between conduction or not, the function can be divided into different parts: hole, tool hole, Via, Blind hole, Buried hole Both of which are also via holes.) In recent years, the development trend of electronic products such as light, thin, short, small and fast has led to the rapid development of drilling technology, machine drilling, laser burning holes, photosensitive holes, etc. Equipment technology used in different levels of board