Coppermine is the code name for Intel's Pentium III CPU family that is a successor to the original Katmai design.
Released 1999.10.25, the 0.18 micron Coppermine chips are available in 500, 533, 550, 600, 650, 667, 700, and 733 MHz versions for desktop PCs. Notebook speeds are 400, 450, and 500 MHz. The front side bus runs at either 100 or 133 MHz, and the chips are multiplied anywhere from 4 to 7 times.
Coppermine CPUs actually use aluminum and not copper, so the name is misleading.