Patent ID: 9613815
Date: 2017-04-04
CPC Classifications: B23K,H01L

Claim:
1. A system for performing defect annealing of a semiconductor wafer having a surface with a pattern, comprising: a CO a beam-conditioning optical system that receives the initial light beam and forms therefrom a conditioned light beam having a first intensity profile with a Gaussian distribution in at least a first direction; a first aperture device operably disposed at an object plane and that defines a first slit aperture that truncates the first intensity profile in the first direction to define first transmitted light that constitutes at least 50% of the conditioned light beam; a relay optical system that defines the object plane and that also defines an intermediate focal plane at which is operably disposed a second aperture device, the relay optical system defining at the intermediate focal plane a second intensity profile having a central peak and first side peaks immediately adjacent the central peak, wherein the second aperture device is configured to truncate the second intensity profile in the first direction and within each of the first side peaks to define second transmitted light; wherein the relay optical system forms from the second transmitted light a first line image at the wafer surface, wherein the first line image includes between 2000 W and 3000 W of optical power, has a first length in the range from 5 mm to 100 mm, and has an intensity uniformity of within +/−5%; a chuck that operably supports the wafer; and a moveable wafer stage that operably supports the chuck and that is configured to move the chuck and the wafer supported thereon so that the first line image scans over the wafer surface to locally raise a temperature of the wafer surface to a defect anneal temperature.