Patent ID: 8039331

Claim:
A method for forming a metal gate field effect transistor comprising: forming a titanium metal gate upon a gate dielectric formed over a semiconductor substrate, and a source region and a drain region are present in the semiconductor substrate on opposing sides of the titanium metal gate; and opto-thermal annealing the source region and the drain region with a laser anneal to activate the source region and the drain region while avoiding opto-thermal annealing damage to the metal gate and metal gate to gate dielectric interface, wherein opto-thermal annealing damage to the metal gate and metal gate to gate dielectric interface is avoided by an opto-thermal annealing radiation reflectivity in the titanium metal gate that is at least 50 percent provided by a laser wavelength ranging from 200nm to 1200 nm, wherein the opto-thermal annealing uses a temperature ranging from 1000° to 1400° centigrade, and wherein the opto-thermal annealing uses a time period ranging from 0.01to 100 milliseconds.