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Etched pcbs are really cheap and the quantity you need could attract a
decent discount. You also get silk screen printing and solder masking
if you want them and, for any proper pcb I think this is essential.
An interesting post.
Setyawan P. Sakti
When mechanical milling removes the copper, it could affect the surface
smoothness of the fiber glass /phenolic layer.
This doesn't happen with etching.
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