Hi Rod,

I would recommend performing weight gains (to optimize oxide build-up) and
weight loss (to optimize acid resistance) on coupons.  Perform these at
least daily.  I assume you'll be using a converter so running acid
resistance tests will give you quantitative numbers as to its ability to
withstand electroless and other processing chemistry.  Some people employ a
simple acid dip test on coupons to see if the converter worked (if it turns
pink it fails) but this method just gives a go or no-go picture as to the
conversion effectiveness.  Many times coupons will pass this color test yet
show excessive weight loss, indicating that the conversion was not complete
and acid attack is still possible.

If you write me off-line I can be more descriptive.

Good luck

Mark Mazzoli
Eng. Mgr.
Circuit Technologies, Inc.
3622 Clearview Pkwy.
Atlanta, GA 30340
770-458-1700
[log in to unmask]
----- Original Message -----
From: Rod Semen <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, September 22, 1999 2:39 PM
Subject: [TN]


> I will be testing a new oxide soon. What test methods would someone
recomend
> to insure that my oxide is performing. I am aware of peel strength and
> thermal shock. Anything other suggestions?
>
> Rod
>
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