Patent ID: 7122474

Claim:
A method for forming a barrier metal of a semiconductor device, comprising: forming an insulating layer on a semiconductor substrate and forming an opening in the insulating layer; forming a TiSiN layer having a desired thickness by repeatedly performing a process of forming a TiSiN layer having an atomic layer thickness in a reaction chamber, wherein the process of forming a TiSiN layer having an atomic layer thickness comprises performing deposition of a Si layer inside the opening and on the insulating layer using an atomic layer deposition process, discharging a gas remaining in the reaction chamber by using an inert gas, performing deposition of a certain precursor layer on the Si layer, and discharging a gas of precursor material remaining in the reaction chamber by using an inert gas; and performing plasma processing for the TiSiN layer so as to remove impurities contained in the TiSiN layer, wherein a pressure of the reaction chamber is between 90 and 300 Torr.