Patent ID: 7244625
Filing Date: 2007-07-17
Classification: H01J,H01L

Abstract:
1. A plasma processing method for performing plasma ashing on a resist on a processing target substrate, comprising: determining in advance a relationship between ashing speed and an addition amount of a deposit gas containing at least one type of deposit component to be generated from the resist by ashing; and adding the deposit gas to gas for plasma generation after the resist or the deposit component generated therefrom decreases to less than a predetermined amount, wherein the amount of the deposit gas added is changed to maintain the deposit component in the plasma at a predetermined amount; monitoring the amount of deposit component by measuring emission intensity thereof; and determining the ashing speed from the addition amount of the deposit gas, calculating the ashing amount from the determined ashing speed and ashing time, and terminating ashing when the calculated ashing amount exceeds a set value.