What’s the exact area to be respected for a component? Is it the outer edge of the courtyard? The inner edge? Or the “ideal/mathematical” line at the middle of the courtyard rendered lines?
For most cases, this is irrelevant and one can simply leave a little gap beyond the courtyard outer edge; but for, say, 0201 decoupling capacitors that we want as close to the pins as possible, then I wonder: what is the closest possible?
As an example, graphically — which of the options would be the closest acceptable placement?
Option 1 (being conservative):
Option 2 (considering outer edge of the footprint’s courtyard lines):
Option 3 (considering the ideal/mathematical line at the middle of the footprint’s courtyard lines):
Or can I still go to option 4, where I would make the inner edges match?
In my case (and I’d guess in most cases), the more relevant part is: how close can the capacitors be to each other (since I have several of them connecting to consecutive pins, so any tiny differences add up and I have to space them out or the traces won’t fit).