Hi Bev,
Electrolytic copper foil of at least 99.9% purity is essentially a contradiction in terms. Commercial electrolytic Cu foil is plated at very high plating current densities—for reasons of economy, of course, which requires quite a witches brew of organic and other additives to be able to plate Cu with good physical properties and at a high rate. Some of these organics plate out on the grain boundaries, and that is the reason why Cu foil is sold by weight [oz/ft2] and with approximate thickness—the density is a variable.
Werner
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-----Original Message-----
From: Bev Christian <[log in to unmask]>
To: [log in to unmask]
Sent: Wed, Oct 20, 2010 2:26 pm
Subject: [TN] Want to buy electrolytic copper foil
TechNetters,
Where can I buy a roll of 0.002" thick electrolytic copper foil of at least
99.9% purity?
Bev
RIM
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