> PCB does min annular ring checks as of several weeks ago. Great! THis is an important check! Thank you!
[ . . . .] > By soldermask bridge width do you mean minimum width in between > soldermask relief areas? Yes. In particular, I am interested to check that the soldermask separating two pins (or a pin and a via, or two vias) is sufficiently wide. Otherwise the possibility of an inadvertent solder bridge exists. > Can you elaborate on "metal slivers"? I mean thin little slivers of copper formed when a circular antipad and some other structure get close to one another, creating a little wedge of copper which sticks into nowhere. These apparently can cause strange etch effects, and are bad for DFM. In the same catagory are slivers of space between metal, where the etchant can apparently concentrate, and eat away more copper than is desirable. Please don't ask me to speak more knowledgably about these strange etch effects -- I am not a PCB fabrication expert. I only repeat here what I have been told. Stuart
