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March 1998

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Subject:
Re: copper etching -Reply
From:
RSedlak <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 23 Mar 1998 20:58:02 EST
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One of the ways that is being looked into to control etching, using ammoniacal
etchant, is to use ORP, as you would in Cupric Chloride etching.

This tends to give real predictable etching.

The ORP is used to control an air flow butterfly type valve.

Rudy Sedlak
RD Chemical Company

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