Patent ID: 6445443
Filing Date: 2002-09-03
Classification: G03B,G03F

Abstract:
A method of operating a lithography system, the lithography system including a spinner which coats, bakes, cools and develops a photoresist film, a stepper which exposes the photoresist film, and first and second controllers which respectively control the spinner and the stepper, said method comprising:applying first wafer information denoting characteristics of a semiconductor wafer to the first controller when the semiconductor wafer is loaded on a transfer unit within the spinner; setting a first optimal process parameter within the spinner according to the first wafer information applied to the first controller; coating, baking and cooling the photoresist film within the spinner in accordance with the first process parameter; applying second wafer information denoting characteristics of the semiconductor wafer to the second controller when the semiconductor wafer is loaded into the stepper; setting a second optimal process parameter within the stepper according to the second wafer information applied to the second controller; exposing the photoresist film to light within the spinner in accordance with the second process parameter; reloading the semiconductor wafer into the spinner; applying third wafer information denoting characteristics of the semiconductor wafer to the first controller when the semiconductor wafer is reloaded into the spinner; setting a third optimal process parameter within the spinner according to the received third wafer information; and developing the photoresist film within the spinner in accordance with the third process parameter.