Patent ID: 7259092

Claim:
A method for fabricating a semiconductor device comprising: forming a contact hole in an insulating interlayer of a semiconductor substrate; depositing a barrier metal layer on an inner surface of the contact hole and an upper surface of the insulating interlayer, wherein the process of depositing the barrier metal is performed by sequentially progressing one cycle of: injecting a reaction gas of SiH 4 to the chamber; injecting a first purging gas to the chamber; injecting a reaction gas of WF 6 to the chamber; injecting a second purging gas to the chamber; injecting a reaction gas of NH 3 to the chamber; and injecting a third purging gas to the chamber; depositing a first metal layer for nucleation on the barrier metal layer by the atomic layer deposition process; and depositing a second metal layer on the first metal layer inside the contact hole, to fill the contact hole completely.