Paul,

Better check those Jedec Specs again!  I'm very certain the numbers in the
specification are in one direction.  In other words 0 to 4 mils not +/-4
mils.  Makes a big difference!

Now the manufacturer has the problem, not you.
Just for the record our company does coplanarity repair if you need us.

Regards, Russ


-----Original Message-----
From: Paul Stolar <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Monday, September 21, 1998 1:57 PM
Subject: [TN] Planarity


>     Is anyone else having problems with the Jedec planarity standard of
>     +/- 4 mils for fine pitch parts?
>
>     The problem we have is that the spec of +/- 4 mils means that one can
>     have an 8 mil planarity problem. If we have the paste thick enough to
>     compensate, we get shorts.
>
>     Is anyone working on tightening the spec?
>
>     If any component guys are out there, what are your thoughts?

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