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September 1999

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Subject:
Re: Ammonium Sulfate vs Ammonium Chloride Etchant
From:
Rudy Sedlak <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 9 Sep 1999 10:59:22 EDT
Content-Type:
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My own experience is that the Ammonium Sulfate based etch is dramatically
slower than the more common Ammonium Chloride based etch, all other things
(temperature, metal content, etc,) being equal.

Rudy Sedlak
RD Chemical Company

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