I think the name "
coppermine" was specifically chosen by
Intel to be misleading.
They saw a lot of media attention around
copper interconnect in
PowerPCs, and wondered how they could take advantage of the
copper craze.
Aha! Pick a codename for the next-generation processor that's still using standard old aluminum interconnect that sounds like it's based on copper interconnect. Coppermine, yes, it doesn't declare that the processor is using copper technology but it sure seems to imply it.