Hi Dave,
 
One way I've been able to meet the needs of the EE's and get a board that  
doesn't cost so much is to put grid marks on the board that match grid  
marks on my assembly drawing.  This way the EE & test group have a  reference 
point to find the parts along with the assembly drawing.  Doesn't  always work 
out that we have enough room, but it is less invasive than the ref  des 
array and more readable.
 
Cherie Litson CID+/CIT
 
 
In a message dated 3/26/2014 10:02:11 A.M. Pacific Daylight Time,  
[log in to unmask] writes:

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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