Hi Mike,

In some instance we have been using anti-tarnish scrubbing before AOI when
necessary. It would reduce drastically the pseudo defects.
An other possibility is to have much different optical set-ups, some are
even using some sort of filters.

Very Best Regards

Roland

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_______________________________________________________________________

----- Original Message -----
From: Mike Bailey <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, February 24, 2000 8:31 PM
Subject: [TN] Outerlayer AOI


> We recently changed AOI machines on which we do outerlayer inspection
after
> etch.  The unit is reflective. The surface topography and reflectiveness
of
> the copper plating cause many psuedo defects.  Has anyone had success with
> either a modification of the tin stripper chemistry or possible using an
> oxide process prior to scanning?
>
> Mike Bailey
> Director of Engineering
> McCurdy Circuits Inc.
> 4900 E. Hunter Ave.
> Anaheim, CA  92870
> Phone: 714 507-4900 Ext 253
> FAX: 714 507-4911
> e-mail: [log in to unmask] <mailto:[log in to unmask]>
>
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