Howdy,

Just had to do this.  I was scanning through my latest 1,000 or so messages
from my mailbox since I was on Vacay and I came across this:

Dear Colleagues:

Are there any studies correlating etch rates to time / temperature /
[Copper] /      [Sulfuric Acid] /  [Persulfate].

I'd like to hold a narrow etch rate window with fewer bath changes.

Any suggestions?
Thank you.

P.G. Wilson
[log in to unmask]


OOOOOOH NO!  WEBTV.NET !!!! OOOOH all you AOL'ers are now not the "scum" to
be avoided.

AGAIN, this is just a little lite harded (hearted .sp.) joke to the forum
where I read all messages.  I tried to tell one of my customers about MELF'S
and soldering and they wouldn't beleive UNTIL I forwarded all of the
messages I had received about this.  But unfortunately, like most things on
this forum, it is around 50/50 for being for/against. What gives?


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