Patent ID: 8242407

Claim:
An apparatus for thermally treating a substrate comprising a semiconductor having a band gap wavelength, comprising: a first source of continuous-wave electromagnetic radiation having a first photon wavelength greater than the bandgap wavelength; a second source of continuous-wave electromagnetic radiation having a second photon wavelength less than the bandgap wavelength; optics interposed between the substrate and the first and second sources (1) directing an output of the first source onto the substrate as an elongate first beam having a first dimension along a first direction substantially smaller than a second dimension of the first beam along a second direction perpendicular to the first direction and (2) directing an output of the second source onto the substrate as a second beam; and a scanning mechanism (1) scanning the first beam relative to the substrate along the first direction and (2) scanning the second beam relative to the substrate so that it surrounds the scanned first beam.