Happy New Year All,

Is there any good reason to call out a maximum gold thickness / nickel thickness on fab notes or is it sufficient to rely on simply stating that the fabricator shall follow ipc-4552 minimum thickness?  I have seen some companies state that a maximum thickness upwards of 15 µin to be acceptable.  Is there any value in stating an upper range?
I know it states in 4552 that an upper range had been debated and not necessary but I still see an upper added to fab notes.

Regards,

Murray Campbell
PCB Design Specialist
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