You don't HAVE to put the ref des on the PWB for every component. On the
assembly drawing, where I have a cluster of resistors/caps, I break out a
magnified view. I do not attempt to put every single 0401 and smaller ref
des on the ink layer for the PWB.

-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of David
Baldwin
Sent: Wednesday, March 26, 2014 12:00 PM
To: [log in to unmask]
Subject: [DC] Smallest Reasonable Ref. Des. Size?

I am finding as I design tighter and tighter boards, especially with 0201's,
the ref des just no longer fit.  I've been moving ref. des to the assembly
layer and leaving them off of the PCB, and where I can, I run leader lines
to their positions.  I've been trying to stay with 1.25mm height with .125mm
line width.  I know it may vary between board shop capabilities, but what is
the smallest reasonable ref. 
des. size that most shops can deal with today.

Thanks,

David Baldwin CID+


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