METHODS AND SYSTEMS FOR CONTROLLING CRITICAL DIMENSIONS IN TRACK LITHOGRAPHY TOOLS

摘要

A method of controlling wafer critical dimension (CD) uniformity on a track lithography tool includes obtaining a CD map for a wafer. The CD map includes a plurality of CD data points correlated with a multi-zone heater geometry map. The multi-zone heater includes a plurality of heater zones. The method also includes determining a CD value for a first heater zone of the plurality of heater zones based on one or more of the CD data points and computing a difference between the determined CD value for the first heater zone and a target CD value for the first heater zone. The method further includes determining a temperature variation for the first heater zone based, in part, on the computed difference and a temperature sensitivity of a photoresist deposited on the wafer and modifying a temperature of the first heater zone based, in part, on the temperature variation.