Dan,

Electroplated copper is used to manufacture the circuit boards, and
electroplating an alloy, to the best of my knowledge, is not a practical
process.  I'm not familiar with the properties of alloy 752, but suspect
that there might be other issues.

Before you bring up solder plating, remember that it's electroplated tin and
lead grains until they are fused into an alloy.

Don Vischulis
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Dan R. Johnson
Sent: Monday, August 19, 2002 2:03 PM
To: [log in to unmask]
Subject: [TN] Missing the obvious


I'm hoping some tech-net metallurgist/alchemist or other wizardly type can
help me with this.

I had a stray thought this weekend and can't seem to find the flaw in my
logic.
Here is how the thought process went;
-Copper oxidizes and must be coated to maintain solderability.
-Certain copper alloy's remain solderable even after long term storage and
exposure to hand oils etc. (i.e.;alloy 752)
-Why isn't a corrosion resistant alloy used in the manufacture of PCB's?

I know the electrical resistance is higher for alloy's but it seems this
could be compensated for the same as trace resistance is now, just get a new
set of numbers.

What am I missing, this is really driving me nuts.

Dan
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