Patent ID: 8129280

Claim:
A method of forming a device on a substrate, comprising: depositing a dielectric layer atop a substrate having a conductivity well; depositing a work function layer comprising titanium aluminum or titanium aluminum nitride having a first nitrogen composition atop the dielectric layer; etching the work function layer to selectively remove a portion of the work function layer from atop the dielectric layer to expose portions of the dielectric layer; depositing a layer comprising titanium aluminum or titanium aluminum nitride having a second nitrogen composition atop the etched work function layer and the exposed portions of the dielectric layer, wherein at least one of the work function layer or the layer comprises nitrogen; etching the layer and the dielectric layer to selectively remove a portion of the layer and the dielectric layer from atop the substrate; and annealing the substrate at a temperature less than about 1500 degrees Celsius.