Patent ID: 6933580
Filing Date: 2005-08-23
Classification: H01L

Abstract:
1. A semiconductor structure comprising: a polysilicon layer; a barrier layer above the polysilicon layer, the barrier layer comprising tungsten silicide having tungsten-rich areas, the tungsten-rich areas forming tungsten oxynitride in the presence of oxygen and nitrogen, wherein the tungsten oxynitride expands relative to the barrier layer to extend outwardly from the sides of the barrier layer to form tungsten oxynitride extrusions, wherein the barrier layer has substantially etched tungsten oxynitride extrusions formed on the side thereof; a conductive layer above the barrier layer, the conductive layer comprising titanium silicide having titanium-rich areas, the titanium-rich areas forming titanium oxynitride in the presence of oxygen and nitrogen, wherein the titanium oxynitride expands relative to the conductive layer to extend outwardly from the sides of the conductive layer to form titanium oxynitride extrusions, wherein the conductive layer has substantially etched titanium oxynitride extrusions formed on the side thereof; and a cap above the conductive layer.