I've used a similar LED on designs, but had to modify the footprint per 
the Fabricators' capability.  Spaced the pads out a bit further and 
reduced the size of the hole a bit so there is sufficient clearance for 
them, 13mil.
Try a compromise, maybe?

Kitty Hines
The Chamberlain Group, Inc.
(630)516-6655
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Pete <[log in to unmask]> 
Sent by: DesignerCouncil <[log in to unmask]>
12/19/2012 08:56 AM
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Re: [DC] Micro-modification fab drawing note






This is why we work with only a few vendors, as business partners, rather 
than just brokering out for the cheapest price.  Our vendors know not to 
make artwork changes without asking.  Any quality vendor should know to do 
that.  I'm not sure that should supplant a note, however, but we've never 
needed one.  That's one of the advantages of developing a relationship 
with a vendor, rather than just buying stuff from people.  (It took me 
years to get our purchasing group to that).  On a 3 day or less turn, my 
vendors know they can call me off hours.  For production turns, I get a 
list of questions, suggestions, clarifications on every board.  Some times 
it's the same question every time, but we have a record (those are getting 
taken care of in our new notes).  I did consider a "No mods" note as parft 
of our new notes, but that doesn't make sense.  Doesn't the drawing and 
CAM files already say "make it just like this".   Why else would we bother 
with documentation in the first place?

What I have seen during new vendor qualification, or the occasional 
off-list procurement, is pad shaving in tight areas, with the reason that 
their process doesn't allow them to guarantee 5/5 finished spacing without 
making more space between copper.  Well then, obviously you can't make our 
boards.  I know someone who can.

Pete

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