I have looked and can’t find a positive answer to what is the minimum annular ring for vias that BatchPCb will tolerate. Sparkfun’s DRC file sets the ring to 10 mils. With other board houses I have used in the past allow the annular ring as small as 7 mils. I know 10 mils is industry preferred, but I may need to push that by going to 7 mils on a few vias.
thanks in advance.