Patent ID: 6303045
Filing Date: 2001-10-16
Classification: C03C,H01L

Abstract:
A method for etching at least partially through a layer disposed on a substrate, comprising:introducing said substrate into a plasma processing chamber;flowing an etchant source gas into the plasma processing chamber;applying a first pressure set point to an automatic pressure control system to control the chamber pressure in the plasma processing chamber;stabilizing the chamber pressure in response to the first pressure set point;forming a plasma in the plasma processing chamber;applying a process pressure set point to the automatic pressure control system;stabilizing the chamber pressure in response to the process pressure set point, the first pressure set point being less than the process pressure set point so that the time required to stabilize the chamber pressure in response to the process pressure set point is less than the time required would be if the first pressure set point were equal to the process pressure set point; andEtching said layer with said plasma.