Patent ID: 8173036
Filing Date: 2012-05-08
Classification: C23F,H01J,H01L

Abstract:
1. A plasma processing method for plasma-processing a target object accommodated in a processing chamber, comprising the sequential steps of: etching the target object with a CF-based processing gas by using a patterned resist film as a mask; removing deposits accumulated inside the processing chamber during the step of etching the target object by using a first processing gas containing at least an O igniting a plasma of a second processing gas containing at least an O lowering a pressure in the processing chamber; and ashing the resist film by using the plasma of the second processing gas, wherein relevant places in the processing chamber from which the deposits are removed are heated in the step of removing the deposits, wherein the pressure in the processing chamber during the step of igniting the plasma is higher than that during the step of removing the deposits, and the pressure in the processing chamber during the step of removing the deposits is higher than that during the step of ashing the resist film, and in the step of removing the deposits, the relevant places are heated to a temperature equal to or higher than 150° C.