1.Uridine-cytidine kinase (UCK) (EC 2.7.1.48) is a pyrimidine ribonucleoside kinase that catalyzes the phosphorylation of uridine and cytidine to UMP and CMP.
4.Meanwhile, CMP slurries are continually flushed with water to keep their fine particles from forming chunks that would tear apart the fragile copper lines.
5.Before the next level of copper lines are added, this one's uneven lines must be polished flat, to near-atomic precision, using a sophisticated grinding process called chemical mechanical polishing, or CMP.
6.CMP levels off the top layers of the wafer and is typically used as the last step in a cycle of processes in order to prepare the wafer for another layer to be added.