Patent ID: 6159867
Filing Date: 2000-12-12
Classification: C23C,H01J,Y10S

Abstract:
A semiconductor processing method of plasma enhanced chemical vapor depositing material over a semiconductor workpiece within a processing chamber comprising:providing a first electrode for supporting a workpiece;providing a second electrode operably associated with the chamber, the first and second electrodes constituting the only processing chamber electrodes relative to which a desired bias is to be developed and a plasma processing environment is to be created;applying RF power to both the first and second electrodes from a single RF power generator via a variable transformer having a primary and a secondary winding, the applied power defining a selected power ratio between the first and second electrodes which is other than a 1:1 ratio; andproviding at least one reactive gas within the processing chamber effective to chemical vapor deposit a layer of material on a wafer supported by the first electrode within the processing chamber.