Patent ID: 6320263
Filing Date: 2001-11-20
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate;a first dielectric layer on said semiconductor substrate, said first dielectric layer having an opening provided therein;a first conductive layer disposed in said opening in said first dielectric layer;a second dielectric layer disposed on said first dielectric layer and said first conductive layer, said second dielectric layer having a second opening provided therein exposing a portion of said first conductive layer;a Period 5 transition metal disposed in said second opening whereby said first conductive layer is activated by the Period 5 transition metal; anda plurality of Period 4 transition metals in alloy selectively disposed on said Period 5 transition metal to form a barrier layer thereon an exterior electrical connection the Period 4 transition metals, wherein the external electrical connection uses a material selected from a group consisting of copper, aluminum, gold, silver, an alloy thereof, and a combination thereof.