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August 2001

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Subject:
From:
"<Rudy Sedlak>" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 22 Aug 2001 10:39:37 EDT
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Bill, unless I am severely mistaken, electroplated gold contains zero
Phosphorous.

Electroplating is always the lowest cost way of depositing a metal, and
electroless is always the most expensive, with immersion plating being
between the two.

Also to be remembered, in the general case, although this is probably
irrelevant in electronics, electroless Nickel, with its contained Phosphorus
is always MUCH more corrosion resistant than electroplated Nickel.

And an aside....electroless Nickel and immersion Gold are the most difficult
to control processes, and the most expensive per unit deposited of any
process that I have ever heard of.  They are a nightmare to control, without
a replenishment/turnover rate that is staggering in its expense.  Anyone
doing it deserves maximum sympathy and understanding.

Rudy Sedlak
RD Chemical Company

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