Patent ID: 6723631
Filing Date: 2004-04-20
Classification: H01L

Abstract:
A fabrication method of a semiconductor integrated circuit device, comprising the steps of:(a) a step of forming a first insulation film on a main surface of a semiconductor substrate; (b) a step of forming an interconnect opening in said first insulation film; (c) a step of depositing a first conductor film for interconnect formation and a second conductor film based on copper for interconnect formation in that order on said first insulation film including an inside of said interconnect opening; (d) a polishing process of polishing said first and second conductor films for interconnect formation thereby forming an interconnect in said interconnect opening; (e) a process of carrying out a cleaning process on the semiconductor substrate after said polishing process; (f) a process of carrying out a plasma process in a hydrogen atmosphere on the substrate after said cleaning process; (g) a process of carrying out a plasma process in an ammonia atmosphere on the substrate after said cleaning process; and (h) a process of depositing a second insulation film on said first insulation film and interconnect after said hydrogen gas plasma and ammonia gas plasma processes.