Patent ID: 8786850

Claim:
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, wherein the first portion of the wafer is less than a selected radial distance from the center of the wafer, wherein the first energy level is at least partially based upon the selected spin frequency and at least partially based upon a radial distance of the first portion of the wafer from the center of the wafer; illuminate a second portion of the wafer with illumination having a second energy level, wherein the second portion of the wafer is less than the selected radial distance from the center of the wafer, wherein the second energy level is at least partially based upon the selected spin frequency and at least partially based upon a radial distance of the second portion of the wafer from the center of the wafer; and illuminate a third portion of the wafer with illumination having a third energy level, wherein the third portion of the wafer is greater than the selected radial distance from the center of the wafer.