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February 2000

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Subject:
From:
"Dion, Mario" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 16 Feb 2000 17:31:22 -0500
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Bonjour Technet,

We plan to place BGA packages with our regular P & P equipment that is not
having the capability to inspect balls prior to place the component onto a
CCA. To do so, we will use the mechanical outline of the package and the P &
P vision system to place the BGA.

We however had the following information from one of our customer saying:

..." a variation in the distance between the edge and the first ball is
possible, and
difficult for the component manufacturers to control..." So it could be very
risky in terms of
reliability, quality and repeatability to use this mean to place a BGA onto
a CCA.

However we are aware that BGA packages exhibit excellent self-centering
properties so even if a slight variation exist from package edge and the
first ball this should not be a problem.

Is anybody else have a concern about that ? Please let me know a.s.a.p.

Thanks and Best Regards,

Mario Dion

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