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Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 28 Nov 2001 15:56:25 EST |
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Thanks to Mark M for the compliment.
Generally, the lower the acid, the better the "etch ratio", or the less the
"undercut", and the slower the etch....
The higher the Copper, the faster the etch.
And, yes, Mark is right, high acid can lead to attack on Titanium.
And in the US, the cost of the HCl is a trivial part of the cost of the etch,
the oxidizer (Peroxide, or Chlorate) is the costly part, so that should
really not be the deciding factor.
Rudy Sedlak
RD Chemical Company
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