Patent ID: 8194301
Filing Date: 2012-06-05
Classification: G01N,G02B,Y10S

Abstract:
1. A multi-spot scanning method comprising: selecting a number of spots N for a one-dimensional (1D) spot array; determining a separation M between the spots in the spot array to minimize crosstalk; performing a scan on a wafer using the spot array and a full field of view (FOV) for each scan line cycle; performing a complete scan without overlapping/missing tracks by providing that: where i=2,3, . . . N and j=2,3, . . . M, wherein performing the complete scan includes performing a plurality of scan line cycles, each scan line cycle filling in gaps left by previous scan line cycles; and using a table to determine allowable combinations of M and N, the table being organized using (1) a spot index i and the separation M, or (2) a swath index j and the number of spots N.