Before revision: CMOS fabrication process While the term front end of line (FEOL) refers to the first portion of any IC fabrication where theindividual devices are patterned in the semiconductor, back end of line (BEOL) comprises the subsequent depositionof metal interconnect layers .
After revision: CMOS fabrication process Back end of the line or Back end of line (BEOL) is a process in semiconductor device fabrication that consists of depositing metal interconnect layers .