How many pads on the 1000 boards are affected? What is the final finish?

It could be as easy as returning them to the supplier, have them remove the
ink with a razor knife and recoat the boards covering any exposed copper.

If they are using lead free HASL and you're using a wave solder process,
and, the ink is not on the pads to a great degree it may not present any
problems.

Franklin

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Black, Paul
Sent: Tuesday, May 16, 2006 7:46 AM
To: [log in to unmask]
Subject: [TN] Silkscreen on pads

Hi Fellow TechNetters,

I am expecting a fabbed board for our first leadfree production build next
month and have just been informed by the supplier that the artwork contained
silkscreen on quite a few of the solderable SMT pads. They didn't catch it
in time, so now they are asking is we could accept the boards (qty = 1000)
this one time. My PCB spec does not allow silkscreen on any solderable
surface, so I could reject the boards, but my concern is that there may not
be enough time to have more boards fabricated in time for this build. I know
that the boards wouldn't be acceptable per IPC-A-610, but does anyone have
any experience with this situation and the best way to handle it?

Thank you,
Paul Black
Manufacturing Engineer
Kronos

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