You are depleting the additive - try add about 10 to 15 % of additive
content and check.
Anil kher
----- Original Message -----
From: Francis Lai <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, September 16, 1999 11:05 AM
Subject: [TN] Dull finish around holes in Cu plating


> We are using pattern plating. After carbon treatment of our acid plating
> bath, we ran dummies for 2 hours then plate our panels. However the area
> around the holes showed dull and slightly rough finishes. The areas
> which have no holes showed shiny. We use the plating bar method. We
> etched the pattern and then use platting bar for connections. We ran two
> panels in a bath which was not carbon treated and they were fine. The
> PTH walls looked dull and slightly rough too. Can anyone help?
>
> My e-mail : [log in to unmask]
>
> Thanks!!!!!
>
> Francis
>
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