agree
On Apr 19, 2018, at 10:11 AM, Wayne Showers wrote:

> The real problem is that this PCB has no etchback, positive or  
> negative (PCBs are defective).  As far as resin recession, yes the  
> processing probably caused the separation, but once again, the PCB  
> has no etchback.
>
> I would send that cross-section image to the PCB supplier and asked  
> them if this is typical.  I suspect that they will realize it is a  
> trap and either offer a crazy answer or admit that their is no  
> etchback and offer to re-run/replace the PCBs.