The annular ring is the ring of via pad area left after drilling; finding the minimum annular ring size that does not impede general reliability leaves designers with more room for routing. Like most design features, the scope and capabilities extend from the IPC Performance Classes and Producibil...
Hello everone, What is standard method of drill and annular ring size of a PTH pin? In other words, how much dimension we have to add to a PTH pin to define a drill and annular ring size? According to one source we have to add 10 mils to the pin size ...
Simply put a mask, a pad, and an annular ring. To be even more specific we want the mask opening to be what we specify. We want the mask size to be smaller than the pin but by only so much. So, we want a way to measure the annular ring of the mask inside the pin pad. We...
and the max drill size is 6.3mm. The hole size in this range does not need extra charges. Usually, engineers will confirm the standard tolerance of the annular ring with customers after receiving the order of PCB assembly prototype or PCB mass production, and provide the right suggestion to...