Patent ID: 8501638
Filing Date: 2013-08-06
Classification: H01L

Abstract:
1. A method of annealing semiconductor device structures supported by a semiconductor wafer, comprising: providing the semiconductor wafer having a wafer surface, with the semiconductor device structures having a cross-scan width WD and spaced apart by scribe lines having a cross-scan width WS: defining a length L of an annealing laser beam that satisfies the relationship n·WD+(n−1)·WS<L<n·WD+(n+1)·WS for integer n, the annealing laser beam having a central section of substantially uniform intensity and opposite tails of substantially reduced intensity as compared to the central section; and scanning the annealing laser beam over the semiconductor device structures over a scan path having adjacent scan path segments such that the center section simultaneously passes over at least n semiconductor devices while the tails of the annealing laser beam associated with the adjacent scan path segments reside only within the scribe lines.