Document when to use the generic footprint generators vs. when specialized footprints must be made

[poeschlr]

We currently require every generic package for which we have an IPC generator to use this in preference over the manufacturer suggested footprint.

There are however exceptions to this. MEMS and RF applications sometimes require an exact layout (MEMS to avoid mechanical stress, RF applications to ensure perfect matching) These specialized footprints are to be placed in the footprint lib meant for this special function.

I would go so far as to require a symbol request for such a specialized footprint to be considered as it is useless otherwise.

Also if the manufacturer names a highly specilized package after a generic package then we might also consider this to be an exception (example if they even list "non JEDEC compliant" in the datasheet)