On the PCB shop copper problem, if it is a double panel, is not also do not have to layout the ground, both sides of the shop copper, and finally casually playing some holes?
It is best to first walk with a fine line to see if the place to be able to, to ensure that can be reached, and then copper. Otherwise, it is easy to cause some parts of the barrier, and sometimes you can not see
See you this "casually playing some of the hole", I think I have also thought that. Long time later to understand that those holes are pay attention to, but in the ordinary low frequency board is not so strict requirements only.
After a long time to understand that those holes are stress, but in the ordinary low-frequency board is not so strict requirements only
