From: Scott Westheimer
Date: 10/17/96

I think that you may be excessive in you treatment. But, it depends on how
much organic are building up. If they are building that fast, find the
source. You might want to try and put a carbon filter in your filter
canister. I would say that every 90 days is an over cure. Check hull cell
for the build up, and track them over time. When all else fails contact
your vendor. In the past, unless some unforeseen problem occurred, we
carbon treated either by hull cell or every 6 months.

----------
> From: [log in to unmask]
> To: [log in to unmask]
> Subject: Fab: Carbon Treatment
> Date: Monday, October 14, 1996 12:32 PM
> 
> Does anyone have any recomendations as to the frequency of carbon
treatment
> for copper sulfate plating baths? 
> 
> Currently, we treat each tank once every 90 days of use (or about every
> 60,000 square feet)
> 
> Thanks in advance for the input!
> 
> Dave Pizzoferrato
> QA Manager
> Centerline Circuits
> Longmont, Colorado
> 
>
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