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November 1999

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Subject:
Re: Banking agent for copper etching
From:
Rudy Sedlak <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 29 Nov 1999 15:21:11 EST
Content-Type:
text/plain
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text/plain (26 lines) 
The banking agent is some chemical that causes a precipitate to "protect" the
sidewall, but that can be knocked out of the bottom of the etched area by the
pressure of the sprays.

Some have said that this "precipitating agent" should work better with
Cuprous Copper, as that is in excess in the etched out area.

Most suppliers are VERY protective of the nature of such agents.

Rudy Sedlak
RD Chemical Company

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