Patent ID: 7659973

Claim:
A wafer inspection system comprising: a. an imager operative to image at least one wafer while the wafer is illuminated and to determine a plurality of spectra for a plurality of regions of the wafer based on data including a degree of color variation in first and second regions of the wafer, the imager including at least one detector; b. an illumination source comprising a laser and a non-linear optical component having a spectral broadening effect on light from the laser, so that the illumination source is configured to illuminate the at least one wafer with a pulse of illumination no longer than 1 ps in time and having a continuous spectral range of at least 20 nm; and c. tuning means disposed in an optical path between the illumination source and the imager, the tuning means operative to tune a spectrum of the wafer inspection system to a desired spectrum by adjusting the spectrum to at least a first spectrum for inspection of the first region of the wafer and adjusting the spectrum to a second spectrum for inspection of the second region of the wafer.