Patent ID: 8222570

Claim:
A process for heating semiconductor substrates comprising: placing a semiconductor substrate in a processing chamber, the semiconductor substrate being coated with at least one material to form a pattern on a surface of the semiconductor substrate; directing first and second laser beams onto said semiconductor substrate from at least a first laser and a second laser for heating and increasing the temperature of the wafer, wherein said first laser emits light at a first wavelength range and said second laser emits light at a second wavelength range, said first wavelength range being different than second wavelength range, and wherein at least one of the laser beams contacts the semiconductor substrate at an angle of incidence of greater than about 40° and in a p-polarized state and has a power of at least about 10 watts; and based upon the pattern on the semiconductor substrate, determining an optimal angle of incidence of at least one of the laser beams that optimizes an absorption of the laser beam by the semiconductor substrate and contacting the semiconductor substrate at the determined optimal angle of incidence with the laser beam.