Patent ID: 6579789
Filing Date: 2003-06-17
Classification: H01L

Abstract:
A method for fabricating a metal wiring, comprising the steps of:forming an insulation film on a semiconductor substrate, the insulation film having a contact hole exposing the semiconductor substrate; forming a Tiâ€”Si film over the semiconductor substrate and the insulation film; forming a Tiâ€”Siâ€”N film on the Tiâ€”Si film; filling up the contact hole by depositing copper on the Tiâ€”Siâ€”N film; and removing a portion of the copper so that a top surface of the copper in the contact hole and a top surface of the Ti-Si-N film over the insulation film are coplanar, wherein the removing step is performed using a chemical-mechanical polishing (OMP) process with the Tiâ€”Siâ€”N film as a polish stop layer.