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May 2004

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Subject:
From:
Lance Mayes <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 17 May 2004 06:19:03 -0600
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Something for the weekend.

We have a SMT prototype board in the works and around the leads for the
IC's there is no mask.  Is there a standard that states whether mask is
required or not?  These are fine pitch leads also.  Another thing is how
much of pad clearance should there be on either side of the lead?  As I
see now there appears to be less than .001 on either side of the leads.
This doesn't allow for any variance of component placement with our pick
and place machine.  Recommendations, suggestions and or directions please.
 Anything to help prevent changing a process further down the road, rev
changes are really cost eaters.

Thanks Net Buddies and Buddettes

                        P.  Lance Mayes

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                        Mfg. Trainer

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