Via in BGA pad again

Here's another example (click image to enlarge) of a via in pad situation we don't like; A large number of vias in the BGA land pads. They're pretty big via holes too.

The component manufacturer will tell you not to do this and we tend to follow that recommendation. Take a look at our white paper on the subject for guidelines on what you should do with vias in and near land pads.

We have some tricks but they will cost extra and will not be guaranteed to work. There are just too many variables.

Duane Benson
A hole lotta nothing under there