Patent ID: 6033983
Filing Date: 2000-03-07
Classification: H01L

Abstract:
A method for forming a barrier metal layer of semiconductor device, comprising:a first step of making a contact hole in an insulating layer by etching the insulating layer to expose a junction after forming the insulating layer on a silicon wafer having a junction therein;a second step of forming a refractory metal layer on the overall surface after stripping a natural silicon oxide layer built up on the surface of the junction;a third step of depositing a refractory metal nitride layer having a thickness on the resultant of the second step;a fourth step of treating the metal nitride layer with oxygen plasma, transforming the surface of the metal nitride layer an amorphous structure and also implanting oxygen ions therein; anda fifth step of depositing a remaining thickness of refractory metal nitride layer on the resultant of the fourth step.