Lou,
I agree with Roger.  Silkscreen on pads should be addressed at design
stages and should not be allowed on pads.  Most of the Gerber editors have
the capability to clear the silkscreen from any pads and hopefully, your
designers/contractors are aware of that capability and know they should not
have silkscreens on pads: SM or thruhole.

bilal


>     Lou,
>
>     We have never allowed silkscreen ink on the pads.  We have had our
>     vendors put the silkscreen on the pads before due to misregistration
>     or errors in their fab artwork.  We have seen solderability problems
>     due to this kind of defect.  If it's not in an industry spec., then it
>     would have to be a requirement in your company's specs. or your
>     individual specs.  PC boards should be DESIGNED such that there is no
>     silkscreen on the pads.
>
>     Regards,
>
>     Roger Held
>     Hitachi Computer Products (America), Inc.
>
>
>______________________________ Reply Separator
>_________________________________
>Subject: FAB:  Silk-screen ink on surface mount pads
>Author:  [log in to unmask] at Internet-HICAM-OK
>Date:    5/28/96 8:42 AM
>
>
>Recently I have seen PC boards with silk screen ink on surface mount
>pads.  Is any of this allowed?  Looking at the PC board IPC standards, I
>don't see this subject addressed.  May I have some guidance?
>Lou Hart   412-858-6117
>
>
>.
>