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January 1997

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Subject:
FAB: Cupric chloride regeneration with sodium chlorate
From:
Ted Stern <"[log in to unmask]"@pconline.com>
Reply To:
[log in to unmask]
Date:
Wed, 22 Jan 1997 12:07:21 -0800
Content-Type:
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I was wondering if any of you fabricators out there would provide me
with information on the following:

a.  method of regerating CuCl2 final etch with sodium chlorate,
including sodium chlorate concentration, HCl additions, rate of
additions, equipment used;

b.  method of automated control (ie. ORP control versus colormetric
control); and

c.  opinions on the ease of use (or lack thereof) of sodium chlorate
versus chlorine gas;

Thanks for you help!

Ted Stern
612-479-6525
[log in to unmask]

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