Patent ID: 6146996
Filing Date: 2000-11-14
Classification: H01L

Abstract:
A method of making a conductive via in a semiconductor device, comprising:providing a semiconductor substrate having a metal stack and a dielectric layer formed thereover, said metal stack including a conductive layer and a layer containing free titanium formed over said conductive layer, said dielectric layer contacting said metal stack;forming a via hole in said dielectric layer, said via hole being misaligned over said metal stack such that at least a portion of a top and at least a portion of a sidewall of said metal stack are exposed, said exposed portion of said sidewall of said metal stack including said layer containing free titanium and at least a portion of said conductive layer;subjecting said exposed portion of said sidewall of said metal stack to a nitrogen plasma to form a nitrided sidewall cap layer; andfilling said via hole with a conductive material to form a conductive via.