Footprint libraries I use are created mainly for DIY PCB manufacturing, but since I’m going to try Seeedstudio Fusion PCB service, I need few questions answered.
How can I calculate drill size, corrected for hole plating? For Example, if I want finished plated hole with diameter of 38mils, what is the drill size I should use (40mils-42mils)? Is there any standard formula to calculate drill size for Fusion PCB service? Something like: required diameter + 4 mils?
I also need confirmation regarding minimum via size. By searching the forum I found post with following minimum values: 12mils via hole and 24 mil via pad? Is this minimum via size? I also need to know what is the current capacity of minimum via size.
Thanks in advance,