Why it is bad if vias are too close to pads of the same Net?
Why putting a via near a pad of the same net makes a board non-manufacturable?
some people will worry about the via theiving solder from the SMD pad, if there is solder resist between the pad and the via this won't happen. Another reason is the width of the solder resist between the pad and via, this may be too small for the manufacturers tolerance.
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