Patent ID: 6410448
Filing Date: 2002-06-25
Classification: H01J,H01L

Abstract:
A method for etching a wafer comprising the steps of:placing the wafer in a reactor chamber in association with a first electrode; applying first power from a first power source to the first electrode at a voltage of about 1,200 volts; applying second power from a second power source to the first electrode at a voltage of about 300 volts; introducing process gasses into the reactor chamber in association with the applying steps; developing a pressure in the reactor chamber of less than 150 millitorr in association with the applying steps and the introducing step; controlling a plasma in the reactor chamber with magnetic confinement; and etching a feature on the wafer; wherein said placing step includes placing a wafer comprising at least one of a film of lead zirconium tantalate (PZT), platinum (Pt), iridium (Ir), bismuth strontium tantalate (Y-1), barium strontium tantalate (BST), iridium oxide (IrO2), ruthenium (Ru), and ruthenium oxide (RuO4).