Drilling - connecting the layers (part 1)
In order to connect the various layers of your layout with each other, the PCBs initially go to the mechanical process, drilling.
At the beginning, locating and registration holes are introduced into our production panel so that human error can be minimized as far as possible. This is done fully automatically and by means of X-ray of the PCB inner layers.
The panels are then fed into the individual drilling machines via a loading system. Each of the buffers can hold up to 20 drill packages and they are processed according to priority. Before the intended vias and component holes are created, the drilling pattern is aligned again using the previously introduced registration features.
Now the tools of between 0.2mm and 6.0mm can start processing the material at rotational speeds of up to 300,000 rpm. Before the PCBs make their next departmental change, all panels are rechecked for burr or offset. This maintains the quality level and detects any potential errors early. Now the PCBs are prepared and ready for through hole plating.