Patent ID: 9194812
Filing Date: 2015-11-24
Classification: F21V,G01N

Abstract:
1. A system for managing illumination energy applied to a surface of a wafer, comprising: a sample stage configured to receive a wafer; a motor mechanically coupled to the sample stage, the motor configured to actuate the sample stage to rotate the wafer at a selected spin frequency; and an illumination system configured to illuminate a first portion of the wafer with illumination having a first energy level, the illumination system further configured to illuminate a second portion of the wafer with illumination having a second energy level, wherein at least one of the first energy level or the second energy level is determined based on a selected radial distance and the selected spin frequency, a region associated with the selected radial distance being larger than or equal to the first portion of the wafer and the second portion of the wafer, wherein the second energy level is adjusted relative to the first energy level and relative to the selected radial distance.