Verfahren zum Bohren von Löchern mittels eines Laserstrahls in einem elektrischen Schaltungssubstrat

摘要

The laser beam has a beam spot diameter which is less than the diameter to be drilled, and is moved along a circular path. When aligning the laser beam to a new hole, the beam axis is firstly guided to the mid point of the hole and then in a defined radial movement away from the mid point. The angular direction of the movement is defined based on the jump direction (S) defined by the start position.