| 摘要 |
<p>The present invention relates to a drilling machine for a multilayer printed circuit board, which comprises a drilling unit which forms a guide hole by drilling a circuit board with a drill, and supports the circuit board with a drilling clamp at a position corresponding to the drill at the opposite side of the circuit board; and an entry sheet supplying unit which supplies an entry sheet between the drilling clamp and the circuit board in order to prevent burrs and damage of the edge of the guide hole during drilling. The drilling machine can rapidly drill the guide hole at a relatively accurate position on multiple circuit boards when manufacturing a multilayer printed circuit board, and can increase productivity by removing the need to replace a drill when drilling a direction hole or an etching hole with a different diameter from that of a reference hole. Moreover, the drilling machine can increase the quality of a circuit board by preventing increase in the diameter of a drill hole of the drilling clamp and the generation of burrs by supplying the entry sheet in a process of forming the guide hole on the circuit board, can prevent the waste of working hours due to frequent replacement of the drilling clamp by extending the life of the drilling clamp, and can prevent the degradation of productivity accordingly.</p> |
